Electric-field-induced aggregation in dilute colloidal suspensions

Paul M. Adriani, A. Gast
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引用次数: 22

Abstract

Electric-field-induced chain formation in dilute, non-aqueous suspensions of sterically stabilized, 1 µm poly(methyl methacrylate)(PMMA) latices are investigated. Optical microscopy and digital image analysis provide the chain-length distribution. We find that the particles carry a charge sufficient to inhibit field-induced aggregation. Equilibrium predictions of chain aggregation incorporating a screened Coulombic repulsion and field-induced dipole attraction agree well with experimental observations near the onset of aggregation; chain formation becomes diffusion limited above the threshold field strength.
稀胶体悬浮液中电场诱导的聚集
在空间稳定的1µm聚甲基丙烯酸甲酯(PMMA)晶格的稀非水悬浮液中,研究了电场诱导的链形成。光学显微镜和数字图像分析提供了链长分布。我们发现这些粒子携带的电荷足以抑制场诱导的聚集。结合筛选的库仑斥力和场致偶极吸引的链聚集平衡预测与聚集开始附近的实验观测结果一致;在阈值场强以上,链形成成为扩散限制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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