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Thermal and Structural Analyses of PMMA/TiO2Nanoparticles Composites 认领 引用 被引量：3
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作者 Nabawia A. El-Zaher Mohamed S. Melegy Osiris W. Guirguis 《Natural Science》 2014年第11期859-870,共12页
In the present work, composites of poly (methyl methacrylate)itanium oxide nanoparticles (100/0, 97.5/2.5, 95/5, 92.5/7.5, 90/10 and 0/100 wt/wt%)were prepared to be used as bioequivalent materials according to their ... In the present work, composites of poly (methyl methacrylate)itanium oxide nanoparticles (100/0, 97.5/2.5, 95/5, 92.5/7.5, 90/10 and 0/100 wt/wt%)were prepared to be used as bioequivalent materials according to their importance broad practical and medical applications. Thermal properties as well as X-ray diffraction analyses were employed to characterize the structure properties of such composite. The obtained results showed variations in the glass transition temperature (Tg), the melting temperature (Tm), shape and area of thermal peaks which were attributed to the different degrees of crystallinity and the existence of interactions between PMMA and TiO2 nanoparticle molecules. The XRD patterns showed sharpening of peaks at different concentrations of nano-TiO2 powder with PMMA. This indicated changes in the crystallinity/amorphosity ratio, and also suggested that the miscibility between the amorphous components of homo- polymers PMMA and nano-TiO2 powder is possible.The results showed that nano-TiO2 powder mix with PMMA can improve the thermal stability of the homo-polymer under investigation, lead- ing to interesting technological applications. 展开更多
关键词 Poly(methyl methacrylate) Nano-Titanium Dioxide Powder PMMA/TiO2 Nanoparticle Composites Differential Scanning Calorimetry (DSC) Thermogravimetric Analysis (TGA) X-Ray Diffraction (XRD)
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Characterization of Calcined Kaolin/TiO2Composite Particle Material Prepared by Mechano-Chemical Method 认领 引用 被引量：12
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作者 WANG Baikun DING Hao DENG Yanxi 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第5期765-769,共5页
Calcined kaolin/TiO2 composite particle material(CK/TCPM)was prepared with TiO2 coating on the surfaces of calcined kaolin particles by the mechano-chemical method.X-ray diffraction(XRD)and scanning electron microscop... Calcined kaolin/TiO2 composite particle material(CK/TCPM)was prepared with TiO2 coating on the surfaces of calcined kaolin particles by the mechano-chemical method.X-ray diffraction(XRD)and scanning electron microscope(SEM)were used to investigate the microstructures and morphologies,respectively.The mechanism of the mechano-chemical reaction between calcined kaolin and TiO2 was studied by infrared spectra(IR).The results show that TiO2 coats evenly on the surfaces of calcined kaolin particles by Si-O-Ti and Al-O-Ti bonds on their interfaces.The hiding power and whiteness of CK/TCPM are 17.12 g/m^2 and 95.7%,respectively,presenting its similarity to TiO2 in pigment properties. 展开更多
关键词 mechano-chemical method calcined kaolin TiO2 composite particles material pigment properties
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Preparation and characterization of ZrO_2/TiO_2 composite photocatalytic film by micro-arc oxidation 认领 引用 被引量：9
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作者 罗强 蔡启舟 +4 位作者 李欣蔚 潘振华 李玉洁 陈喜娣 严青松 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第10期2945-2950,共6页
ZrO2/TiO2 composite photocatalytic film was produced on the pure titanium substrate using in-situ Zr（OH）4 colloidal particle by the micro-arc oxidation technique and characterized by scanning electron microscope （... ZrO2/TiO2 composite photocatalytic film was produced on the pure titanium substrate using in-situ Zr（OH）4 colloidal particle by the micro-arc oxidation technique and characterized by scanning electron microscope （SEM）, energy dispersive X-ray （EDX）, X-ray diffraction （XRD） and ultraviolet-visible （UV-Vis） spectrophotometer. The composite film shows a lamellar and porous structure which consists of anatase, futile and ZrO2 phases. The optical absorption edge of film is shifted to longer wavelength when ZrO2 is introduced to TiO2. Furthermore, the photocatalytic reaction rate constants of degradation of rhodamine B solution with ZrO2/TiO2 composite film and pure TiO2 film under ultraviolet irradiation are measured as 0.0442 and 0.0186 h 1, respectively. 展开更多
关键词 pure titanium micro-arc oxidation Zr（OH）4 colloidal particle ZrO2/TiO2 composite photocatalytic film
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Preparation of Barite/TiO2Composite Particle and Interaction Mechanism between TiO2and Barite Particles 认领 引用 被引量：6
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作者 Wang Baikun Ding Hao +1 位作者 Wang Yongkui Liang Ning 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2011年第S3期193-197,共5页
Barite/TiO2 composite particle(B/TCP)was prepared by coating TiO2 on the surfaces of barite particles through mechano-chemical method.The preparation parameters and pigment properties of B/TCP as well as the interacti... Barite/TiO2 composite particle(B/TCP)was prepared by coating TiO2 on the surfaces of barite particles through mechano-chemical method.The preparation parameters and pigment properties of B/TCP as well as the interaction mechanism between barite and TiO2 were studied.The results indicated that the mechanical co-grinding process and the proportion of TiO2 affected the properties of B/TCP significantly.B/TCP prepared under optimal conditions was similar to TiO2 in pigment properties.It was mainly the strong electrostatic attraction between barite and TiO2 in water that combined them firmly and then formed B/TCP. 展开更多
关键词 barite/TiO2 composite particle mechano-chemical titanium dioxide interaction mechanism between particles
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Environmentally friendly wollastonite@TiO2 composite particles prepared by a mechano-chemical method 认领 引用 被引量：3
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作者 Xifeng Hou Yihe Zhang +1 位作者 Hao Ding Paul K.Chu 《Particuology》 SCIE EI CAS CSCD 2018年第5期105-112,共8页
Core-shell wollastonite@ TiO2(WOT)composite particles are prepared by a mechano-chemical method (MCM)to improve the dispersion of TiO2and reduce its dosage,and to achieve synergistic effects with the wollastonite mine... Core-shell wollastonite@ TiO2(WOT)composite particles are prepared by a mechano-chemical method (MCM)to improve the dispersion of TiO2and reduce its dosage,and to achieve synergistic effects with the wollastonite mineral.The crystal structure,morphology,functional groups,and pigment properties of the as-prepared composite powders are determined.The W@T composite particles are formed by van der Waals force in addition to electrostatic attraction and chemical bonding.The anatase TiO2coating is anchored on the woUastonite surface by Si-O-Ti and Ca-O-Ti bonds.The W@T powders possess excellent characteristics such as whiteness of 96.6%,hiding power of 17.97g/m^2,and oil absorption of 22.72g/100g.The properties of the W@T composite are similar to those of TiO2and the former,which is much cheaper,can potentially substitute the latter as a white paint in many applications. 展开更多
关键词 Wollastonite TiO2 Composite particles Mechano-chemical method
纳米SiO_2-TiO_2改性形状记忆聚氨酯 认领 引用 被引量：2
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作者 牛古丹 吴宝华 +3 位作者 牟宏晶 鹿桂芳 俞志刚 李立波 《内蒙古师范大学学报（自然科学汉文版）》 北大核心 2015年第2期220-224,共5页
在合成形状记忆聚氨酯(SMPU)的过程中,加入经过KH550表面处理后的纳米SiO2-TiO2复合粒子,制备了新型的纳米SiO2-TiO2形状记忆聚氨酯复合材料.讨论了改性形状记忆聚氨酯产品的形状记忆性能、力学性能和热性能等.研究结果表明:随着纳米SiO... 在合成形状记忆聚氨酯(SMPU)的过程中,加入经过KH550表面处理后的纳米SiO2-TiO2复合粒子,制备了新型的纳米SiO2-TiO2形状记忆聚氨酯复合材料.讨论了改性形状记忆聚氨酯产品的形状记忆性能、力学性能和热性能等.研究结果表明:随着纳米SiO2比例的增加,复合产品形状固定率有所增加而形状回复率减小;当纳米SiO2与TiO2的配比为2∶8时,复合材料的力学性能增加,但随着纳米SiO2所占比例的增加,复合材料的力学性能反而减小;复合材料的热变形温度和维卡软化点均有所提高. 展开更多
关键词 形状记忆 聚氨酯 纳米SiO2-TiO2复合粒子 复合材料
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化妆品用聚甲基丙烯酸甲酯-二氧化钛复合微球的制备及性能 认领 引用 被引量：14
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作者 罗付生 韩爱军 +1 位作者 杨毅 李凤生 《日用化学工业》 北大核心 2002年第2期40-42,共3页
根据微粒子设计的原理 ,通过使用搅拌磨和干式冲击设备在微米级 (d50 为 5 0 μm )的聚甲基丙烯酸甲酯 (PMMA)微球上包覆一层纳米级 (d50 为 10 0nm)的TiO2 粒子 ,并用扫描电镜观察了所得微粒子的形貌 ,用紫外分光光度仪扫描了其紫外吸... 根据微粒子设计的原理 ,通过使用搅拌磨和干式冲击设备在微米级 (d50 为 5 0 μm )的聚甲基丙烯酸甲酯 (PMMA)微球上包覆一层纳米级 (d50 为 10 0nm)的TiO2 粒子 ,并用扫描电镜观察了所得微粒子的形貌 ,用紫外分光光度仪扫描了其紫外吸收谱图 ,发现经复合后的纳米TiO2 粒子的分散性得到明显改善 ,且经复合处理后TiO2 粒子的紫外吸收能力增强了 3倍～ 10倍。并介绍了该复合粒子在化妆品中的应用。 展开更多
关键词 化妆品 聚甲基丙烯酸甲酸-二氧化钛 复合微球 制备 性能
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高聚物复合微球的制备研究 认领 引用 被引量：2
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作者 罗付生 丁建东 李凤生 《中国粉体技术》 CAS 2002年第3期10-12,共3页
根据机械力化学的原理 ,通过使用自行研制的设备在微米级Ps和PMMA微球上复合一层纳米级的TiO2 粒子 ,使用扫描电镜和光电子能谱对制得的复合微粒子进行表征 ,发现该方法可以使纳米TiO2 粒子呈很好的分散状态复合在聚合物微球上 ,而且由... 根据机械力化学的原理 ,通过使用自行研制的设备在微米级Ps和PMMA微球上复合一层纳米级的TiO2 粒子 ,使用扫描电镜和光电子能谱对制得的复合微粒子进行表征 ,发现该方法可以使纳米TiO2 粒子呈很好的分散状态复合在聚合物微球上 ,而且由于聚合物微球原料的不同 ,纳米TiO2 粒子能在高聚物的表面的复合状态也不同。 展开更多
关键词 高聚物微球 TiO2纳米粒子 复合粒子
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