期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到8,127篇文章
< 1 2 … 250 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
In Situ Construction of Fluorinated Polyester-based Block Copolymer Electrolytes via Orthogonal Polymerization 认领 引用
1
作者 Kai-Rui Guo Mu-Yao Lv Zhi-Gang Xue 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第3期623-631,I0007,共9页
The practical deployment of polyester-based solid electrolytes such as poly(ε-caprolactone)(PCL)is hindered by two inherent material-level constraints:the semicrystalline nature of PCL chains severely restricts segme... The practical deployment of polyester-based solid electrolytes such as poly(ε-caprolactone)(PCL)is hindered by two inherent material-level constraints:the semicrystalline nature of PCL chains severely restricts segmental mobility and limits ionic conductivity,whereas interfacial instability against lithium metal anodes jeopardizes long-term cycling.Based on orthogonal polymerization technology combined with electrolyte structural design concepts,this work achieved a one-step fabrication of a polyester-based block copolymer electrolyte(BCPE)system comprising fluorinated segments(PTFEA)and poly(ε-caprolactone)(PCL).Structurally,this design enables a dual breakthrough in electrochemical performance:on one hand,the introduction of fluorinated segments with steric hindrance effects can effectively disrupt the regular arrangement of the PCL main chain,reduce the crystallinity of PCL within the polymer electrolyte,and significantly enhance the segmental mobility of the polymer matrix;on the other hand,during the charge/discharge cycles of lithium batteries,fluorinated segments can induce the formation of a LiF-rich solid electrolyte interphase(SEI)through in situ decomposition reactions,achieving interface stabilization and homogeneous lithiumion deposition regulation. 展开更多
关键词 Ring-opening polymerization Reversible addition-fragmentation chain-transfer(RAFT)polymerization Well-defined polymer One pot Solid polymer electrolyte
暂未订购 下载PDF
The Magic of Organocatalytic Synergism in Switchable Polymerization:One-pot Synthesis of Block Copolymers with Programmable Sequences and Compositions 认领 引用
2
作者 Shuai-Shuai Zhu Mao-Ji Zhao +1 位作者 Ying-Jie Yuan Yong Wang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第1期68-78,I0010,共11页
Switchable polymerization is emerging as a powerful tool to construct block copolymers directly from mixtures of monomers.However,current achievements typically iterate between two polymerization cycles to afford prod... Switchable polymerization is emerging as a powerful tool to construct block copolymers directly from mixtures of monomers.However,current achievements typically iterate between two polymerization cycles to afford products with fixed sequences and compositions.Herein,we report the triethylborane/1,8-diazabicyclo[5.4.0]undec-7-ene(Et_3B/DBU)pair-mediated four-component switchable polymerization of propylene oxide(PO),CO2,phthalic anhydride(PA),and racemic lactide(rac-LA),which enables the on-demand synthesis of four different block copolymers,i.e.,poly(propylene phthalate)-b-polylactide(PPE-b-PLA),PPE-b-PLA-b-poly(propylene carbonate)(PPC),PPE-b-PPC-b-PLA,and PPE-b-PPCb-poly(propylene oxide)(PPO),through rationally modulating the Lewis pair(LP)ratio.Core to this protocol is that increasing the loading of Et3B accelerates the ring-opening of PO while impeding the reactivity of rac-LA,thus allowing for fine-tuning of the thermodynamic and kinetic of the switchable polymerization.Therefore,the four polymerization cycles involving PO/PA ring-opening copolymerization(ROCOP),PO/CO2 ROCOP,rac-LA ring-opening polymerization(ROP),and PO ROP can be connected and discriminated in precisely programmed manners. 展开更多
关键词 Switchable polymerization Organic Lewis pair Block copolymers Ring-opening copolymerization Multicomponent reaction
暂未订购 下载PDF
Alkyl Alcohol Chain-length Mediated Steric Hindrance at Support Surface in Heterogeneous α-Diimine Ni Catalysts for Modulating Ethylene Polymerization 认领 引用
3
作者 Fan Yu Bin Dai +2 位作者 Ning Liu Bin-Yuan Liu Chen Zou 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第2期331-340,I0007,共10页
Heterogeneous polymerization represents a widely employed method in the polyolefin industry.In recent years,various heterogenization strategies for late transition metal catalysts have been developed,enabling effectiv... Heterogeneous polymerization represents a widely employed method in the polyolefin industry.In recent years,various heterogenization strategies for late transition metal catalysts have been developed,enabling effective control of polymer morphology and optimization of catalytic performance.However,while most studies have focused on designing anchoring groups and advancing support approaches,systematic investigations into how the support influences the catalytic behavior of the late transition metal catalysts.In this work,we fabricated supported α-diimine nickel catalysts by functionalizing the ligand with alkyl alcohol chains of varying lengths and supporting them onto MgCl2supports.The ethylene polymerization behavior of these catalysts was then investigated.By precisely adjusting the alkyl alcohol chain length,the distance between the catalytically active metal center and the support surface was modulated.This approach demonstrates that support-induced steric hindrance effect can be effectively regulated by controlling the separation distance between the metal center and the support surface. 展开更多
关键词 Ethylene polymerization Ni catalysts α-Diimine Heterogeneous polymerization Polyethylene
暂未订购 下载PDF
Controlled Chain-Walking Polymerization in the Gas Phase to Ultrahigh Molecular Weight Polyethylene 认领 引用
4
作者 Yan Wang Shuaikang Li +1 位作者 Mengyao Zhang Shengyu Dai 《Precision Chemistry》 CAS CSCD 2026年第1期13-19,共7页
This study presents an unconventional approach for the gasphase synthesis of ultrahigh molecular weight polyethylene(UHMWPE)using sterically hindered 2,6-bis(diarylmethyl)α-diimine palladium(II)catalysts.By leveragin... This study presents an unconventional approach for the gasphase synthesis of ultrahigh molecular weight polyethylene(UHMWPE)using sterically hindered 2,6-bis(diarylmethyl)α-diimine palladium(II)catalysts.By leveraging a self-supported chain-walking polymerization mechanism,the catalysts form thin films on reactor walls,enabling efficient ethylene polymerization without solvents.The gas-phase chain-walking mechanism facilitates the migration of palladium species within the porous polymer matrix,enabling them to locate and access optimal sites for ethylene capture and subsequent insertion.The distal substituents on the catalysts were systematically varied to investigate their electronic and steric effects on polymerization activity,molecular weight,and branching density.Under optimized conditions(6 atm ethylene,25°C),the catalysts achieved high activity(up to 3.90×105 g/(mol·h))and produced UHMWPE with molecular weights exceeding 1600 kg/mol.Kinetic studies revealed a unique three-stage polymerization process,while branching densities(29−131 branches/1000 C)were tunable via catalyst design.The resulting polyethylene exhibited a porous network morphology and balanced mechanical properties,combining high impact resistance with processability.This work highlights the potential of gas-phase polymerization as an environmentally friendly and cost-effective route to UHMWPE with tailored microstructures. 展开更多
关键词 UHMWPE palladium catalysts chain-walking gas-phase polymerization ethylene polymerization
Uniform Branched Polymer Microspheres via Reversible Addition-fragmentation Chain Transfer Dispersion Self-condensing Vinyl Polymerization 认领 引用
5
作者 Chao-Jian Luo Li Zhang Jian-Bo Tan 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第7期2153-2166,共14页
We report a reversible addition-fragmentation chain transfer(RAFT)dispersion self-condensing vinyl polymerization(SCVP)platform using a chain-transfer monomer(CTM)and macro-RAFT agent for the one-pot synthesis of mono... We report a reversible addition-fragmentation chain transfer(RAFT)dispersion self-condensing vinyl polymerization(SCVP)platform using a chain-transfer monomer(CTM)and macro-RAFT agent for the one-pot synthesis of monodisperse microspheres composed of well-defined branched(multi)block copolymers.Under RAFT dispersion polymerization conditions,the CTM functions as both a comonomer and branching RAFT site,affording polymer microspheres containing branched polymers while maintaining narrow particle size distributions.The preserved RAFT end-groups on the branches enabled seeded chain extension to give branched diblock and multiblock copolymer microspheres with methyl methacrylate(MMA)and a range of second monomers,while retaining microsphere monodispersity.Using styrene(St)as the second monomer yielded nanostructured branched PMMA-b-PSt microspheres,whose internal morphologies underwent a sphere-to-cylinder transition as the branching degree in the PMMA block was decreased at a fixed composition.These results establish the branching degree in the branched block as an effective parameter to manipulate intraparticle phase behavior and demonstrate RAFT dispersion SCVP as a scalable route to sequence-controlled,topologically complex polymer microspheres with tunable internal nanostructures. 展开更多
关键词 Reversible addition-fragmentation chain transfer(RAFT)dispersion polymerization Self-condensing vinyl polymerization Polymer microspheres Branched polymers
暂未订购 下载PDF
Wide bandgap steric carbazole-fluorene-nanogrid polymers via metal-free C-N polymerization for deep-blue polymer light-emitting diodes 认领 引用
6
作者 Man Xu Qianyi Li +8 位作者 Jingyao Ma Hao Li Yunfei Zhu Fan Yu Kuande Wang Tao Zhou Quanyou Feng Linghai Xie Jinyi Lin 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第1期356-360,共5页
To precisely control intrachain π-electron delocalization and interchain interaction simultaneously is the prerequisite to obtain stable and efficient deep-blue light-emitting p-n polymer semiconductors for the polym... To precisely control intrachain π-electron delocalization and interchain interaction simultaneously is the prerequisite to obtain stable and efficient deep-blue light-emitting p-n polymer semiconductors for the polymer light-emitting diodes(PLEDs).Herein,we introduced the steric carbazole-fluorene nanogrid into light-emitting diphenyl sulfone-based p-n polymer semiconductors(PG and PDG) via metal-free C-N coupling polymerization for the fabrication of deep-blue PLEDs.The steric,rigid and twisted configuration between nanogrid and diphenyl sulfone in PG and PDG present the unique characteristic of large steric hindrance interaction to suppress interchain aggregation in solid state.Due to the different length of electron-deficient diphenyl sulfone monomers,PG showed a deep-blue emission with a maximum peak at 428 nm but red-shifted to 480 nm for the PDG films.Interestingly,similar deep-blue emission behavior of PG in diluted non-polar solution and films suggested the extremely weak interchain aggregation.Finally,PLEDs based on PG are fabricated with a stable deep-blue emission of CIE(0.15,0.10),and corresponding EL spectral profile is also completely identical to PL ones of diluted solution,revealed the intrachain emission without obvious interchain excited state,confirmed effectiveness of the steric hindrance functionalization of nanogrid in p-n polymer semiconductor for deep-blue light-emitting organic optoelectronics. 展开更多
关键词 p-n polymer semiconductors Metal-free C-N polymerization Steric carbazole-fluorene nanogrid Diphenyl sulfone Deep-blue polymer light-emitting diodes
暂未订购 下载PDF
Crosslinking Behavior and Curing Properties of Environmentally Friendly Polyurethane Modified Asphalt Prepared by In-situ Polymerization 认领 引用
7
作者 GONG XING SUN Mingzhi +2 位作者 WAN PEI LIU Quantao WU Shaopeng 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2026年第4期1134-1144,共11页
This study investigated the crosslinking behavior and curing properties of environmentally friendly polyurethane(PU)modified asphalt(PUMA)prepared by in-situ polymerization.The research aimed to clarify the chemical r... This study investigated the crosslinking behavior and curing properties of environmentally friendly polyurethane(PU)modified asphalt(PUMA)prepared by in-situ polymerization.The research aimed to clarify the chemical reaction sites and sequence between the PU prepolymer(PUP)and asphalt components,and to evaluate the microstructural and performance evolution of PUMA during curing.Density functional theory(DFT)calculations were employed to predict reactive sites based on electrostatic potential and frontier molecular orbitals,and to compute Gibbs free energy and transition state energy barriers.The experimental results indicate that phenolic hydroxyl and pyridinic nitrogen in asphaltene molecules and phenolic hydroxyl in resin molecules are the primary sites for reaction with PUP.PUP reacts spontaneously with chain extender(BDO),water,asphaltene,and resin at room temperature,with the reaction following the order:BDO>H2O>asphaltene-1>asphaltene-2>resin.Microstructural analysis by atomic force microscopy reveals that PU acts as a bridge connecting asphaltene and resin,forming an integrated network that became more perfect with prolonged curing time.Fourier transform infrared spectroscopy of SARA fractions confirms the formation of amide bonds between PUP and asphalt components.The high-temperature performance of PUMA improves with curing time,while the low-temperature performance slightly decreases but still meets specification requirements after 180 days of curing.The findings can provide a fundamental basis for the design and preparation of high-performance PUMA. 展开更多
关键词 PU modified asphalt density function theory crosslinking behavior curing property insitu polymerization
暂未订购 下载PDF
Synthesis of Polydicyclopentadiene Thermosets with High Stretchability and Self-healing Properties via Ring-opening Metathesis Polymerization 认领 引用
8
作者 Wu Li Cheng-Yang Ban +4 位作者 Yu-Hao Xiong Da-Wei Zhang You-Gui Li Meng-He Xu Gui-Fu Si 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第4期1083-1089,I0015,共7页
Thermosetting polymers exhibit outstanding mechanical properties,thermal stability,and chemical resistance due to their permanently cross-linked network structures.However,the irreversible nature of covalent cross-lin... Thermosetting polymers exhibit outstanding mechanical properties,thermal stability,and chemical resistance due to their permanently cross-linked network structures.However,the irreversible nature of covalent cross-linking renders these materials non-reprocessable and non-recyclable,posing significant environmental challenges.Although healable polymers based on dynamic covalent bonds and supramolecular interactions have emerged as promising alternatives,a broadly applicable strategy utilizing metal-ligand coordination in thermoset systems remains underexplored.In this work,we present a robust and healable thermoset system fabricated via ring-opening metathesis polymerization(ROMP)of commercially available chelating norbornene comonomers.Cross-linking is accomplished through O-donor coordination to Lewis acidic metal centers,yielding polydicyclopentadiene(PDCPD)-based networks that demonstrate high mechanical strength(up to 60.8 MPa)and effective self-healing performance.This methodology offers a simple and scalable approach to developing high-performance,sustainable thermosetting materials. 展开更多
关键词 Polydicyclopentadien Ring-opening metathesis polymerization High Stretchability Self-healing properties
暂未订购 下载PDF
In situ Multiple Optical Monitoring of Bulk Polymerization 认领 引用
9
作者 ZHANG Ruiqing YIN Kuo +3 位作者 CHEN Yanjie GU Fan LIU Jian MA Xiang 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2026年第5期247-253,共7页
Optical visualization provides a highly sensitive,non-invasive,and straightforward approach for the in situ monitoring of bulk polymerization processes.This paper synthesized a 9,14-diphenyl-9,14-dihydrodibenzo[a,c]ph... Optical visualization provides a highly sensitive,non-invasive,and straightforward approach for the in situ monitoring of bulk polymerization processes.This paper synthesized a 9,14-diphenyl-9,14-dihydrodibenzo[a,c]phenazine(DPAC)-based molecule,whose distinct excited-state conformational responses under different microenvironments enabled the monitoring of microscopic dynamic changes within the system.During the polymerization of methyl methacrylate(MMA),the system transfer from a liquid monomer to a solid polymer.Accompanying this process,the fluorescence of DPAC shifts from red to blue,reflecting the increase in local viscosity and the restriction of molecular motion.Subsequently,the gradual enhancement of phosphorescence and the extension of its lifetime indicate the rising rigidity of the polymer network.Through dual-channel monitoring based on ratio-metric fluores⁃cence and phosphorescence,this strategy makes the visual tracking of bulk polymerization feasible. 展开更多
关键词 In situ monitoring Bulk polymerization Vibration-induced emission
暂未订购 下载PDF
Oligomeric α-diimine nickel catalysts for enhanced ethylene polymerization 认领 引用
10
作者 Jingfeng Yue Zhenxin Tang +1 位作者 Yuxing Zhang Zhongbao Jian 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第1期380-384,共5页
Catalysts are key for olefin polymerization reactions and are also ubiquitous in catalysis science.Multinuclear metal catalysts have witnessed enhanced performances in catalytic reactions relative to mononuclear catal... Catalysts are key for olefin polymerization reactions and are also ubiquitous in catalysis science.Multinuclear metal catalysts have witnessed enhanced performances in catalytic reactions relative to mononuclear catalysts,but which substantially involve multi-step,tedious,and difficult synthesis.Herein,this study reports an intriguing approach to construct multi-nuclear catalysts for the milestoneα-diimine nickel catalysts using an oligomeric strategy.A polymerizable norbornene unit is incorporated into theα-diimine ligand backbone,leading to the formation of the monomeric nickel catalyst Ni1and its corresponding oligomeric nickel catalysts(Ni3and Ni5)with varying degrees of polymerization(DP=3 and 5).Notably,the oligomeric catalyst Ni5was facilely scaled up(50 g-level),showed enhanced thermal stability,exhibited 4.6 times higher activity,and yielded polyethylene elastomer with a 379%increased molecular weight in ethylene polymerization,compared to the monomeric catalyst Ni1.Catalytic performance enhancements of oligomeric catalysts were found to be DP-dependent.The kilogram-scale polyethylene,produced using Ni5in a 20 L reactor,presented a highly branched all-hydrocarbon structure,which demonstrated typical elastic properties(tensile strength:4 MPa,elastic recovery:SR=72%)along with great processability(MFI=3.0 g/10 min),insulating characteristics(volume resistivity=2×1016Ω/m),and hydrophobicity(water vapor permeability:0.03 g/m2/day),suggesting potentially practical applications. 展开更多
关键词 Polyolefin Oligomeric catalyst Polyethylene elastomer Ethylene polymerization Nickel catalyst
暂未订购 下载PDF
Discovery of Two Novel Pyrazole Derivatives as Anticancer Agents Targeting Tubulin Polymerization and MAPK Signaling Pathways 认领 引用
11
作者 Denisse A.Gutierrez Elisa Robles-Escajeda +7 位作者 Jose A.Lopez-Saenz Robert A.Kirken Edgar A.Borrego Ana P.Betancourt Soumya Nair Sourav Roy Armando Varela-Ramirez Renato J.Aguilera 《Oncology Research》 SCIE 2026年第4期381-412,共32页
Objectives:Drug resistance is the major determinant of chemotherapy failure,leading to relapse and tumor progression,demonstrating the urgent need for novel antineoplastic drugs.This study aimed to evaluate the antica... Objectives:Drug resistance is the major determinant of chemotherapy failure,leading to relapse and tumor progression,demonstrating the urgent need for novel antineoplastic drugs.This study aimed to evaluate the anticancer potential of two novel pyrazole derivatives,P3C.1 and P3C.2,and to elucidate their mechanism of action in cancer cells.Methods:The cytotoxicity of the compounds was evaluated across 27 different cancer cell lines via a nuclear staining assay.Subsequent flow cytometric and biochemical analyses were performed to assess reactive oxygen species(ROS)generation,apoptosis induction,mitochondrial integrity,and cell cycle progression.Additional studies included transcriptome analyses and immunoassays to characterize the molecular mechanisms underlying drug activity.Results:Two novel pyrazole derivatives,P3C.1 and P3C.2,were identified with potent cytotoxicity on a variety of cancer cell lines.Among the adherent cell lines tested,the triple-negative breast cancer(TNBC)cell line MDA-MB-231 exhibited the highest sensitivity to both compounds and was therefore selected for further experimentation.In vitro assays demonstrated that both compounds induced ROS generation,mitochondrial membrane depolarization,cell cycle arrest and apoptosis.Whole-transcriptome sequencing of P3C.1 and P3C.2-treated MDA-MB-231 and two lymphoblastic leukemia cell lines revealed four genes in common associated with cell signaling and membrane dynamics.Connectivity Map(CMAP)database comparisons of shared genes for each cancer subtype revealed a strong similarity between the two compounds with tubulin inhibitors,and subsequent assays confirmed that these compounds act as microtubule-disrupting agents.Moreover,protein phosphorylation analysis indicated that both compounds induced hyperphosphorylation of JNK,and ERK1/2,along with hypophosphorylation of p38 kinases.Conclusions:P3C.1 and P3C.2 emerged as promising anti-breast cancer agents with dual mechanisms of action involving microtubule disruption and altered kinase signaling,leading to induction of apoptosis. 展开更多
关键词 Pyrazoles cytotoxicity triple-negative breast cancer(TNBC) apoptosis tubulin polymerization inhibition phosphorylation
暂未订购 下载PDF
Recent Advances in Nickel-and Palladium-catalyzed Copolymerization of Ethylene with Fundamental Polar Monomers 认领 引用
12
作者 Kang-Kang Li Zhong-Bao Jian 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第7期2062-2085,共24页
Coordination-insertion copolymerization of ethylene with polar vinyl monomers offers a direct route to functionalized polyolefins,enabling regular incorporation of polar groups under mild conditions and superior micro... Coordination-insertion copolymerization of ethylene with polar vinyl monomers offers a direct route to functionalized polyolefins,enabling regular incorporation of polar groups under mild conditions and superior microstructural control compared with post-functionalization or radical routes.The persistent polar monomer problem—the tendency of polar groups to coordinate to or poison active metal sites—motivates the focus on late-transition-metal catalysts,chiefly Ni and Pd.Recent advances in ligand design,catalyst engineering,and monomer modification have improved comonomer incorporation,suppressed chain transfer,and enhanced thermal robustness.Mechanistic studies now resolve2,1-versus 1,2-insertion,ligand-induced chelate isomerization,and polar-monomer-promoted chain-transfer pathways.This feature article surveys nickel-and palladium-based catalytic systems reported from 2020 onward for copolymerization of ethylene with fundamental polar monomers,with an emphasis on acrylates,while also covering acrylic acid,vinyl acetate,butyl vinyl ether,acrylonitrile,acrylamide,vinyl silyl ethers,and selected disubstituted monomers,categorizing recent advances by key ligand classes([N,N],[N,O],[P,O])and linking mechanism,selectivity,and polymer properties to guide catalyst design and scale-up. 展开更多
关键词 Nickel and palladium catalysts Polar monomers Coordination-insertion polymerization Polyolefin
暂未订购 下载PDF
In-situ polymerization technology for all-solid state lithium batteries:Current status and future development 认领 引用
13
作者 Zhaojun Chen Yongqi Wang +6 位作者 Yongshun Liang Liang Shan Ying Wang Jiyue Hou Ziyi Zhu Xue Li Yiyong Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第6期15-26,共12页
The utilization of solid electrolytes as substitutes for flammable liquid electrolytes represents a crucial strategy for enhancing both the safety and energy density of lithium metal batteries.However,the poor solid-s... The utilization of solid electrolytes as substitutes for flammable liquid electrolytes represents a crucial strategy for enhancing both the safety and energy density of lithium metal batteries.However,the poor solid-solid contact between electrodes/electrolytes and the inherent difficulties of Li dendrite growth have seriously hindered their practical applications.Among the various types of solid electrolytes,polymer electrolytes are highly regarded for their potential high ionic conductivity,good deformability,and wide electrochemical window.In-situ curing technology has been demonstrated to be an effective solution to these problems and shows great application prospects in polymer electrolyte all-solid-state lithium-metal batteries.This paper will provide a comprehensive review of the three primary types of polymerization methods:free radical polymerization,ring-opening metathesis polymerization,and ionic polymerization.The technical principles,research progress,and performance optimization of in-situ polymerized solid state electrolytes will be reviewed,and the review will look forward to the future development of in-situ curing.The emerging challenges faced by the field and the potential opportunities in practical applications will be pointed out.As research progresses and technology advances,in-situ curing technology is poised to reinvigorate the development of all-solid-state batteries,propelling them towards enhanced safety,efficiency,and reliability. 展开更多
关键词 Solid-state electrolytes In-situ polymerization technology Polymer electrolytes Lithium metal batteries Initiators Interfacial stability Lithium dendrite suppression
暂未订购 下载PDF
Dual-stimuli regulated atom transfer radical polymerization with red-light-active carbon dots 认领 引用
14
作者 Yang Li Zhang Cheng Zhou +3 位作者 Yu Rui Wang Jianfei Chen Xue Li Tao Cai 《Science China Chemistry》 SCIE EI CAS CSCD 2026年第7期3678-3685,共8页
Carbon dots(CDs)have shown great potential as photocatalysts for photoinduced atom transfer radical polymerization(photo-ATRP),offering high polymerization rates and precise control over polymer structures.However,the... Carbon dots(CDs)have shown great potential as photocatalysts for photoinduced atom transfer radical polymerization(photo-ATRP),offering high polymerization rates and precise control over polymer structures.However,their reliance on high-energy ultraviolet(UV)or blue light causes side reactions and restricts practical application.To overcome this limitation,we developed red-light-active pyridine nitrogen-doped CDs through an HNO3-assisted hydrothermal method.The optimized material,nCD-50,exhibited strong absorption in the red region and outstanding photocatalytic activity under 640 nm light,enabling the synthesis of well-defined polymers with predictable molecular weights and low dispersity.The system was responsive to both light and pH switching.Under red light,the polymerization rates showed strong pH-dependence:it was more than two times faster under acidic conditions than under neutral pH,and nearly ceased in alkaline environments.In contrast,blue light irradiation resulted in fast polymerization without observable pH dependence,achieving near-quantitative monomer conversion within 1 h.This performance exceeds most reported CDs-based photocatalysts.Moreover,the nCD-50-based system enabled scalable polymer production in a continuous flow reactor.This work provides a strategic design for efficient long-wavelength photocatalysts and advances the potential of photo-ATRP for industrial applications. 展开更多
关键词 carbon dots photo-ATRP red light mediation dual stimuli continuous flow polymerization
暂未订购 下载PDF
Study on the decomposition mechanism of supercritical ethylene during ultra-high pressure polymerization process 认领 引用
15
作者 Yao Chen Zhichen Zhang +6 位作者 Yunfeng Zhu Haowen Chen Yifan Song Ruiyi Zhang Xiaogang Shi Bing Sun Wei Xu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第2期146-156,共11页
In the production of low density polyethylene(LDPE),the presence of oxygen may induce the decomposition of supercritical ethylene,thereby affecting the stability of equipment operation and potentially leading to safet... In the production of low density polyethylene(LDPE),the presence of oxygen may induce the decomposition of supercritical ethylene,thereby affecting the stability of equipment operation and potentially leading to safety hazards.This study investigated the inducing and promoting effects of oxygen on the runaway decomposition of supercritical ethylene.The reaction mechanism of oxygen-induced supercritical ethylene was explored through ReaxFF molecular dynamics simulation,and the reaction network was systematically constructed.It was found that the minimum oxygen concentration required to initiate ethylene decomposition at 240℃ and 240 MPa was 0.0042%(mass).The coupling of oxygen and ethylene to form the intermediate C2HxO·promoted the cleavage of the C-C bond in ethylene.Under the condition of oxygen absence,ethylene mainly underwent polymerization reactions.As the oxygen concentration increased,unstable intermediates such as C2HxO·were generated,and the dominant reaction pathway of ethylene shifted from polymerization to decomposition.This study provided a theoretical basis for understanding the oxygen induced supercritical ethylene decomposition in low density polyethylene process. 展开更多
关键词 Ethylene decomposition Ethylene polymerization Low density polyethylene ReaxFF molecular dynamics Decomposition mechanism
暂未订购 下载PDF
In-situ carbene polymerization on copper electrodes to modulate interface microenvironment for selective electrochemical CO2 reduction 认领 引用
16
作者 Yuyang Cao Tingting Zhang +4 位作者 Huaqian Yang Wenfeng Zhang Feifei Li Liwei Xiong Gongwei Wang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第3期153-160,共8页
The development of functional interfacial microenvironments via polymer coating modification offers a promising strategy for enhancing electrocatalytic reactions.However,conventional polymer modification typically rel... The development of functional interfacial microenvironments via polymer coating modification offers a promising strategy for enhancing electrocatalytic reactions.However,conventional polymer modification typically relies on physical approaches such as drop-coating or spraying,which often suffer from issues such as uneven distribution and limited controllability.In this study,we introduce a novel approach that leverages the direct metal-catalyzed cleavage of diazo compounds to initiate carbene polymerization,enabling the in-situ growth of functional polymers on the Cu surface.By employing this method with three different diazo monomers,we fabricated distinct carbene polymer(CP)modification layers on a Cu electrode surface and investigated their influence on the electrocatalytic CO2 reduction reaction.Our findings demonstrate that Cu electrodes modified with CP derived from phenyl diazo compounds exhibit a substantial improvement in C2+production(primarily ethylene).In-situ Raman spectroscopy analysis revealed that CP modification effectively reduced the interfacial H2O content and increased the*CO intermediate coverage,thereby facilitating C-C coupling and enhancing ethylene production.This study highlights the potential of surface polymerization for constructing functional interfacial microenvironments to control electrocatalytic reactions. 展开更多
关键词 CO2reduction Interfacial microenvironment Surface modification Carbene polymerization Ethylene
暂未订购 下载PDF
3D Turing nanowrinkles via anisotropic photopolymerization 认领 引用
17
作者 Qi Duan Xian-Zi Dong +3 位作者 Jie Liu Fan-Chun Bin Xin-Yi Wu Mei-Ling Zheng 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第2期544-559,共16页
Inspired by the diverse wrinkled surface patterns in nature,micro-nano scale wrinkled surfaces have become an essential part of materials science.Nowadays,it is still a challenge to flexibly fabricate three-dimensiona... Inspired by the diverse wrinkled surface patterns in nature,micro-nano scale wrinkled surfaces have become an essential part of materials science.Nowadays,it is still a challenge to flexibly fabricate three-dimensional(3D)nanowrinkled structures with precise configuration.Herein,we introduce a reaction-diffusion-based self-organized Turing mechanism integrated with femtosecond laser direct writing(FsLDW)to achieve controlled anisotropic photopolymerization,fabricating 3D hydrogel-based biomimetic Turing nanowrinkled structures.This approach enables precise spatial modulation of wrinkle periodicity,orientation,and amplitude.Furthermore,using methacrylated hyaluronic acid(MeHA)monomers,we elucidate the mechanistic interplay between anisotropic photopolymerization and Turing-patterned nanowrinkle formation.We further propose a theoretical framework—the polarization modulation of femtosecond laser pulses enables the anisotropic photopolymerization of Turing-patterned nanowrinkles,selectively generating aligned linear(Turing-line)and vertically ordered pillar(Turing-column)structures.According to this theoretical framework,we propose the concept of the nanowrinkle parameter(Wr),alongside an empirical formula derived from two-photon polymerization(TPP)fabrication parameters to predict Turing nanowrinkle emergence conditions.We also demonstrate the ability to create high-resolution,3D nanowrinkled structures,including patterned structures,bio-inspired microvilli resembling those of the small intestine,cicada wing replicas,and moth-eye structures.Moreover,we functionalize Turing-patterned structures with magnetron-sputtered Ag coatings,creating microano-devices for molecular surface enhanced Raman scattering(SERS)detection.The Turing-inspired SERS devices demonstrate ultra-trace detection capability for Rhodamine 6G(R6G)at concentrations as low as 10−9M.This work provides a novel,high-precision methodology for the fabrication of complex,bionic,free-form Turing nanowrinkled structures. 展开更多
关键词 hyaluronic acid derivative two-photon polymerization 3D Turing patterns nanowrinkled structure surface-enhanced Raman scattering
暂未订购 下载PDF
Two-photon polymerization based microfluidic biochip incorporating a herringbone microchannel and deterministic lateral displacement design for efficient capture of circulating tumor cells 认领 引用
18
作者 Xinyi LIANG Changwei QIN +10 位作者 Kaiqiang LI An REN Jiarui HU Weikang LV Lunan KE Zhen WANG Mengfei YU Xiuxiu JIANG Huayong YANG Xiaobin XU Liang MA 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS CSCD 2026年第4期334-347,I0008,I0009,I0049,共14页
Circulating tumor cells(CTCs)are cells that become detached from a primary tumor and enter the vascular or lymphatic system.These cells contain nearly the entire genetic information of the primary tumor.Enrichment and... Circulating tumor cells(CTCs)are cells that become detached from a primary tumor and enter the vascular or lymphatic system.These cells contain nearly the entire genetic information of the primary tumor.Enrichment and detection of CTCs play a crucial role in prognostications and risk assessments of tumor metastasis and recurrence,evaluation of efficacy and potential medications for precision tumor therapy,and detection of dynamic biomarkers during tumor treatment.Current methods of CTC capture often face the challenge of balancing capture rate and purity.To address these issues,we propose a microfluidic biochip based on the principle of immunoaffinity,which incorporates a herringbone microchannel and deterministic lateral displacement(DLD)technology for the capture of CTCs.By manipulating the internal structural design of the microfluidic chip,we optimized the flow field within the chip,thereby enhancing the contact frequency between cells and aptamers and ultimately improving the capture rate.The proposed chip demonstrated a capture efficiency of approximately 91.87%for human breast cancer cells(MCF7),with a release rate of 77.5%.The relative activity of the released cells was approximately 94.08%.Notably,the specificity of the aptamers toward tumor cell surface antigens enables high-purity capture.Additionally,the use of DNA enzymes to digest aptamers facilitates the release of high-activity CTCs,offering a method to simultaneously achieve a high capture rate,purity,and activity enrichment. 展开更多
关键词 Circulating tumor cell(CTC) Cell sorting Microfluidic chip Two-photon polymerization Deterministic lateral displacement
暂未订购 下载PDF
A robust photoinduced radicals-catalyzed reversible addition-fragmentation chain transfer(RAFT)polymerization with wide-spectral utilization:from visible to full NIR-I region 认领 引用
19
作者 Haitao Zhao Chaowei Cheng +6 位作者 Nannan Liao Mengyu Xu Peidong Chen Xiaoguang Bao Weiwei He Lifen Zhang Zhenping Cheng 《Science China Chemistry》 SCIE EI CAS CSCD 2026年第7期3656-3670,共15页
A photoinduced radicals-catalyzed reversible addition-fragmentation chain transfer(PRC-RAFT)polymerization that differs from the well-known photoiniferter RAFT and photoinduced electron/energy transfer RAFT(PET-RAFT)t... A photoinduced radicals-catalyzed reversible addition-fragmentation chain transfer(PRC-RAFT)polymerization that differs from the well-known photoiniferter RAFT and photoinduced electron/energy transfer RAFT(PET-RAFT)techniques is proposed based on a breakthrough discovery of the photo-radical synergy(PRS)effect,where photon and non-initiating organotellurium radicals that produced readily from ditellurium compound interact synergistically to cleave the C-S bond in chain transfer agent(CTA)to generate initiating radicals for polymerization.Unlike the photocatalysts(PCs)in PET-RAFT relying on special absorption window,the PRS is energy-matching,therefore this PRC-RAFT is capable of utilization of light in a wide range of wavelength from the visible to full NIR-I region(500-980 nm).Additionally,the"living"features and spatiotemporal control of the polymerization system are demonstrated successfully by polymerization kinetics,multiple light"on-off"cycle experiments and synthesis of block copolymers.Well-defined polymers with narrow molar mass dispersity(minimumĐ=1.04)are synthesized from a broad range of monomers including methacrylates and acrylates,thanks to the high efficiency of this PRC-RAFT polymerization.Finally,green aqueous PRC-RAFT polymerization is also developed successfully by choosing hydrophilic ditellurium compound,demonstrating great promise in high-end area such as biomedical field. 展开更多
关键词 photochemistry near infrared(NIR)light radical catalyst organotellurium reversible addition-fragmentation chain transfer(RAFT)polymerization
暂未订购 下载PDF
Multicomponent Polymerization of Alkynes,Amines,and Benzaldehyde toward Main-chain Charged Aggregation-induced Emission Polyelectrolytes 认领 引用
20
作者 Qiu-Shuo Zhang Bo Song +1 位作者 An-Jun Qin Ben-Zhong Tang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第4期988-995,I0011,共8页
Aggregation-induced emission(AIE)polymers have been extensively studied;however,the integration of AIE units into polyelectrolytes remains largely limited by the laborious multistep synthesis of pre-designed emissive ... Aggregation-induced emission(AIE)polymers have been extensively studied;however,the integration of AIE units into polyelectrolytes remains largely limited by the laborious multistep synthesis of pre-designed emissive monomers.Herein,we report a one-pot multicomponent polymerization method that directly produces main-chain charged polyelectrolytes with intrinsic AIE characteristics from non-emissive building blocks.By optimizing the monomer structures and reaction conditions,a series of soluble high-molecular-weight polymers with welldefined backbones were obtained in high yields.The resulting polyelectrolytes displayed robust AIE behavior,exhibiting fluorescence enhancement up to about 60-fold in an aqueous environment,and maintained excellent thermal stability.Owing to their cationic backbones,these polymers interact strongly with microbial surfaces and exhibit remarkable antimicrobial activities.This study establishes a synthetically efficient route to AIE polyelectrolytes and highlights their potential applications as multifunctional materials for bioimaging,antimicrobial therapy,and other applications. 展开更多
关键词 Multicomponent polymerization Aggregation-induced emission Polyelectrolyte Antibacterial
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 250 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈