The influence of particle size and functional group as one of the pivots for particle interaction that enhances electrorheological performance were studied by varying the particles to micron and nanometer-sized polyacrylonitrile (PAN) spheres for rheological comparability analysis. Emulsion polymerization and catalytic amination with diethylene triamine (DETA) were used to successfully synthesize ER particle samples and then dispersed in silicon oil for suspension analysis. Micron-sized particles presented a large surface electron density for high conversion of nitrile groups with DETA than in nano. Polar groups from DETA improved particle polarization which enhanced ER effect by increasing yield strength by more than 10 folds on raw PANs. However, small sized nano particle exhibited relatively reduced ER effect owing to aggregation by Brownian motion pronouncing aminated micro PAN with the best ER activity followed by the aminated nano PAN, micro PAN and nano PAN as follows.

通过将颗粒改变为微米和纳米尺寸的聚丙烯腈 (PAN) 球体进行流变比较分析，研究了粒径和官能团作为增强电流变性能的颗粒相互作用的关键之一的影响。采用乳液聚合和二亚乙基三胺 (DETA) 催化胺化成功合成 ER 颗粒样品，然后分散在硅油中进行悬浮分析。与纳米相比，微米尺寸的颗粒呈现出较大的表面电子密度，可用于使用 DETA 进行腈基团的高转化。DETA 的极性基团改善了粒子极化，通过将原始 PAN 的屈服强度提高了 10 倍以上，从而增强了 ER 效应。然而，