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作者针对目前电流变(ER)液领域存在的问题,在建立ER液测试系统和方法的基础上,系统地研究了含聚合物粒子的ER液的设计、性能以及它们产生ER效应的机理。 首次用反相乳液聚合工艺直接合成了具有较高ER活性的聚甲基丙烯酸盐的含水ER液,研究了影响该体系的屈服应力(τs)、漏电流密度(J)和稳定性的因素。提出了水分在含水ER液中的作用是协助产生可移动离子的观点,并用离子极化机理解释了实验现象。 首次通过α,ω-双甲基丙烯酰氧基封端的聚乙二醇均聚或与甲基丙烯酸盐共聚,用反相悬浮聚合工艺成功地制备了有较高活性的含AB交联型聚醚类固体电解质的无水ER液。 研究了含聚苯胺(PAn)的ER液的性能及其与组成材料性能的关系。证实了“多粒子效应”和由于自由电荷在粒子间跃迁产生的“导电率效率”对ER效应有重要作用。指出ER液的电流主要是沿粒子链或柱状体进行传输的,并首次将电导的不同程跳跃模型推广到ER液中,较好地解释了ER液的电导行为。 用共混或接枝共聚等三种方法制备了具有核壳结构的PAn复合粒子。并用它们组成ER液,得到了E=2.8kV/mm时,τs高达16.3kPa,J仅为2.67μA/cm~2的高性能ER液。首次系统地研究了核壳型复合粒子中的核与绝缘壳层间的相互作用和ER效应的关系。
In the light of the existing problems in ER fluid field, the author systematically studied the design and properties of ER fluid containing polymer particles and their mechanism of ER effect based on the establishment of ER fluid test system and method. For the first time, an aqueous ER solution of polymethacrylate with higher ER activity was directly synthesized by inverse emulsion polymerization. The factors affecting the yield stress (τs), leakage current density (J) and stability of the system were investigated. It is proposed that the role of water in aqueous ER solution is to assist in the generation of mobile ions and the experimental phenomena are explained by the ion polarization mechanism. For the first time, α, ω-bismethacryloxy-capped polyethylene glycol was homopolymerized or copolymerized with methacrylic acid. Polymerization reaction of AB with cross-linked poly Ethers solid electrolyte anhydrous ER solution. The properties of polyaniline (PAn) -containing ER solution and its relationship with the properties of the constituent materials were investigated. It is confirmed that “multiparticle effect” and “conductivity efficiency” due to the transition of free charge between particles play an important role on ER effect. It is pointed out that the current of ER fluid is mainly transported along the particle chain or the columnar body, and for the first time the different conductivity jump models are extended to the ER fluid, which can well explain the conductance of ER fluid. PAn composite particles with core-shell structure were prepared by blending or graft copolymerization. And used them to make up ER fluid. High performance ER fluid with τ = 16.3 kPa and J of 2.67 μA / cm ~ 2 was obtained at E = 2.8 kV / mm. For the first time, the relationship between the core-shell interaction and the ER effect in core-shell composite particles has been studied systematically.