Response of Crystal-like Suspension of Polymer Colloids to the External Field

去离子悬浮液中胶体球的研究引起了人们极大的兴趣。在这个项目中，由于扩大了德拜筛选长度和球体之间的静电排斥，排序已经明确。最近，日本研究者从双态结构的错误假设出发，提出离子间存在静电吸引。然而，他的一系列想法是完全错误的。在本研究项目中，得到了许多重要的结果，有力地支持了球间斥力的重要性；(1)测定了胶体球的有效电荷数。(2)建立了获得高度去离子的胶体悬浮液的实验程序，该悬浮液具有强烈的虹彩颜色和明亮的晶体。(3)在沉积平衡状态下对有序胶体进行微观观察，得到胶体晶体的弹性模量。(4)利用反射光谱和透射光谱方法研究了去离子胶体球的晶体状结构。(5)研究了聚合物胶体晶体状结构在电场、高压、离心压缩、引力场、剪应力等作用下的响应。(6)测量了晶体状和液体状悬浮液的结构和平动弛豫时间。(7)讨论了线性巨离子和胶体的旋转弛豫时间。(8)观察到聚合物胶体的气状、液体状和晶体状悬浮液的特殊粘度行为。

There has been a great deal of interest on the colloidal spheres in deionized suspensions. In this project, the ordering has been clarified due to the expanded Debye screening length and the electrostatic repulsion between spheres. Recently, Japanese researcher proposed that there is electrostatic intermacroion attraction from the erroneous assumption of two-state structure. However, his series of ideas are completely in error.In this research project, many important results, which supports strongly the importance of the interspherical repulsion, are obtained; (1)effective charge number of colloidal spheres are determined. (2)Experimental procedures are established for obtaining highly deionized colloidal suspensions which displays strong iridescent colors and brilliant crystallites. (3)Microscopic observation of ordered colloids are done in sedimentation equilibrium to obtain elastic modulus of the colloidal crystals. (4)Crystal-like structures of deionized colloidal spheres are studied by the reflection spectrum and trans-mitted-light spectrum methods. (5)Response of the crystal-like structures of polymer colloids is studied in an electric fields, high pressure, centrifugal compression, gravitational field, shearing stress,etc. (6)Structural and translational relaxation times of both crystal-like and liquid-like suspensions are measured. (7)Rotational relaxation times of linear-type macroions and colloids are discussed. (8)Extraordinary viscosity behavior is observed for the gas-like, liquid-like and crystal-like suspensions of polymer colloids.