Structure and Frictional Properties of Colloid Gel
Structure and Frictional Properties of Colloid Gel
复制标题
胶体凝胶的结构和摩擦性能
作者：
M. Tokita
已知当制备条件如反应温度和组成改变时，聚合物凝胶是不透明的。凝胶不透明度的增加强烈地暗示了网络结构的变化。本文就近年来不透明聚丙烯酰胺凝胶的结构和摩擦学研究作一综述。结果表明，不透明聚丙烯酰胺凝胶是由亚微米级胶粒的分形聚集体组成。从结构参数计算胶体颗粒的密度，发现其为约1g/cm 3的量级。结果表明，主链组分和交联剂紧密交联成颗粒。从聚丙烯酰胺凝胶的结构参数出发，分析了聚丙烯酰胺凝胶的摩擦性能。结果表明，不透明凝胶的摩擦特性可以用不透明凝胶的结构参数很好地解释。
Polymer gels are known to be opaque when the preparation conditions, such as the reaction temperature and the composition, are changed. The increase of the opaqueness of the gel suggests strongly the change of network structure. Here, we are going to review the recent studies on the structure and the frictional study of the opaque poly(acrylamide) gel. The results indicate that the opaque poly(acrylamide) gel consists of the fractal aggregate of the colloidal particles of sub-micrometer in size. The density of the colloid particle is calculated from the structural parameters and is found to be of the order of about 1 g/cm3. The results indicate that the main chain component and the cross-linker is densely cross-linked into the particle. The frictional property of poly(acrylamide) gel is analyzed in terms of the structural parameters of the gel. It is found that the frictional property of the opaque gel is well explained in terms of the structural parameters of the opaque gel.