核壳结构的半导体 PMMA/聚苯胺类雪人状各向异性微米粒子及其电流变性能。

Core-shell structured semiconducting PMMA/polyaniline snowman-like anisotropic microparticles and their electrorheology.

机构信息

Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Korea.

出版信息

Langmuir. 2010 Aug 3;26(15):12849-54. doi: 10.1021/la101165k.

PMID:20593791

Abstract

Core-shell structured semiconducting snowman-like particles were synthesized, and their electrorheological (ER) characteristics under an applied electric field were examined. Monodispersed snowman-like poly(methyl methacrylate) (PMMA) particles were fabricated previously using a seed emulsion polymerization procedure. These anisotropic particle-based ER fluids, which were tested using a rotational rheometer, exhibited unusual ER properties in the flow curves at various electric field strengths when analyzed using the Cho-Choi-Jhon model. The dielectric spectra, as supporting data for the ER effect, were measured using a LCR meter. The relaxation time of the ER fluid was relatively shorter than typical ER fluids.

摘要

核壳结构的半导体雪人状粒子被合成，并在施加电场的情况下研究了它们的电流变（ER）特性。先前使用种子乳液聚合程序制备了单分散性雪人状聚甲基丙烯酸甲酯（PMMA）粒子。这些各向异性基于粒子的 ER 流体使用旋转流变仪进行测试，当使用 Cho-Choi-Jhon 模型分析时，在各种电场强度下的流动曲线中表现出异常的 ER 特性。介电谱作为 ER 效应的支持数据，使用 LCR 仪表进行测量。ER 流体的弛豫时间相对比典型的 ER 流体短。