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

近年来，人们对去离子悬浮液中的胶体球产生了极大的兴趣。在这个项目中，由于扩展的德拜屏蔽长度和球间的静电斥力，有序性得到了澄清。最近，日本研究人员从错误的两态结构假设出发，提出了静电大离子间吸引的观点。在这项研究中，获得了许多重要的结果，有力地支持了球间排斥的重要性：(1)确定了胶体球的有效电荷数。(2)建立了获得彩虹色彩浓郁、微晶艳丽的高去离子胶体悬浮液的实验方法。(3)在沉淀平衡条件下，对有序胶体进行微观观察，得到胶体晶体的弹性模数。(4)用反射光谱法和透射法研究了去离子胶体微球的类晶体结构。(5)研究了聚合物胶体的晶态结构在电场、高压、离心力、重力场、剪切力等作用下的响应。(6)测量了晶态和液态悬浮液的结构和平移弛豫时间。(7)讨论了线型大离子和胶体的转动弛豫时间。(8)聚合物胶体的气态、液态和晶态悬浮液具有特殊的粘度行为。

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.