Abstract As an electrically stimuli-responsive organic/inorganic hybrid material, poly(3,4-ethylenedioxythiophene) (PEDOT)/silica nanocomposite particles were synthesized by in-situ chemical oxidative polymerization using an ultrafine methanolic silica sol. The morphology and structure of the PEDOT/silica nanocomposite were confirmed by both scanning electron microscopy and transmission electron microscopy, while their chemical structure and thermal properties were examined by Fourier transform infrared spectroscopy and thermogravimetric analysis, respectively. The rheological response of the PEDOT/silica-based electrorheological (ER) fluid dispersed in silicone oil was measured using a rotational rheometer. Under an electric field, the ER fluid exhibited a solid-like behavior and the flow curves of shear stress were fitted well to the Cho-Choi-Jhon model. In addition, the dielectric property of PEDOT/silica nanocomposite exhibited a relatively small polarizability difference, but with a very short relaxation time.

中文翻译：

---

半导体聚（3, 4-乙撑二氧噻吩）/二氧化硅纳米复合颗粒的制备和电刺激响应

摘要 作为电刺激响应的有机/无机杂化材料，使用超细甲醇硅溶胶通过原位化学氧化聚合合成了聚（3,4-乙撑二氧噻吩）（PEDOT）/二氧化硅纳米复合颗粒。PEDOT/二氧化硅纳米复合材料的形貌和结构通过扫描电子显微镜和透射电子显微镜进行确认，而它们的化学结构和热性能分别通过傅里叶变换红外光谱和热重分析进行检测。使用旋转流变仪测量分散在硅油中的 PEDOT/二氧化硅基电流变 (ER) 流体的流变响应。在电场作用下，ER 流体表现出类似固体的行为，剪切应力的流动曲线与 Cho-Choi-Jhon 模型拟合良好。此外，PEDOT/二氧化硅纳米复合材料的介电性能表现出相对较小的极化率差异，但弛豫时间非常短。