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The Structure and Electrorheological Effect of PAn/BaTiO3 Nanocomposite
Wei Jianhong,Guan Jianguo,Shi Jing,Yuan Runzhang
Author NameAffiliationE-mail
Wei Jianhong Department ofPhysics, Wuhan University, Wuhan 430072;State KeyLaboratory ofAdvancedTechnologyfor Materials Synthesis and Processing, Wuhan University ofTechnology, Wuhan 430070  
Guan Jianguo State KeyLaboratory ofAdvancedTechnologyfor Materials Synthesis and Processing, Wuhan University ofTechnology, Wuhan 430070  
Shi Jing Department ofPhysics, Wuhan University, Wuhan 430072; jshi@whu.edu.cn 
Yuan Runzhang State KeyLaboratory ofAdvancedTechnologyfor Materials Synthesis and Processing, Wuhan University ofTechnology, Wuhan 430070  
Abstract:
Organic-inorganic nanocomposite, which is the complexof inorganic nanoparticleswiththe organic compound, is a popular research project in the nanoscale composite. The blending of different sorts of materials produces composite structures which can combine different material properties, or may reveal novel properties not existing in the constituent phases. In this issue, taking account of the problems in electrorheological fluids such as the high leakage current, low yield stress and stability, a novel type of electrorheological particleswhichwere composed of the polyaniline core and BaTiO3shell were prepared. As the core was made of polyaniline, the diameter and its distribution of ER particle (ERP) could be readily controlled. Furthermore, the polymer core contributed to the reduction of the density of ER particles, whichwas expected to prevent the sedimentation of the particles. The outer nonconductive layer, on the other hand, should have strong electronic resistance and excellent dielectric strength. In this sense, barium titanate was one of the best materials for the nonconductive layer. We had deposited BaTiO3layers on the particles bymeans of the sol-gel technique. The structure of particles was characterized byTEMand FT-IR; the influence of the thickness of barium titanate of the ERP on the ER effectswere studied in detail. The results showed that the ER effect of composite particleswas far stronger than that of pure polyanilineswhichwere synthesized by the same method, the thickness of BaTiO3thin filmhad an important influence on the ER effects and the optimum effectwas obtained atd=20 nm.
Key words:  PAn/BaTiO3nanocomposite, Core-shell structure, Dielectric properties, ER effects
FundProject:
核壳型聚苯胺/钛酸钡的结构及其电流变性能
魏建红,官建国,石兢*,袁润章
摘要:
用改进的溶胶-凝胶法制备了核壳型聚苯胺/钛酸钡复合微粉,通过TEM及FT-IR分析表征了其形貌及微观结构,用复合微粉与氯化石蜡油配制成无水电流变(ER)液,研究其不同膜厚核壳粒子的电流变性能.研究结果表明,聚苯胺/钛酸钡复合粒子配置成的电流变液的电流变性能较纯聚苯胺的为强;钛酸钡的涂层厚度对复合粒子电流变性能有重要影响;并在d=20 nm时获得最佳电流变性能.
关键词:  核壳结构  PAn-BaTiO3  纳米复合材料  电流变性能
DOI:10.1088/1674-0068/16/5/401-405
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