STUDIES ON FABRICATION OF SUPRAPARTICLES USING REACTIVE POLYMERIC MICROSPHERES

以苯乙烯和甲基丙烯酰氧基苯基二甲基硫鎓甲基硫酸盐为单体，采用无皂乳液共聚法合成了粒径约0.2μ m、表面活性酯基含量较高的单分散反应性聚合物微球。利用反应性高分子微球表面的阳离子电荷和对伯氨基的高反应性，主要在玻璃板的固/液界面上，通过吸附和结合两种方法，研究了反应性高分子微球的粒子组装体--超粒子.使用吸附方法，通过将玻璃板浸入相对高浓度的含有低浓度添加的盐NaCl的水性颗粒分散体（胶乳）中来制造稳定的颗粒单层。对于该系统，通过将吸附的颗粒层浸渍到十二烷基硫酸钠的水溶液中，然后浸渍到胶乳中的重复几次循环，形成了更致密堆积结构的颗粒单层。另一方面，使用粘合方法，通过将用带有伯氨基的硅烷偶联剂表面胺化的玻璃板浸入含有相对高浓度的添加盐的低浓度胶乳中来完成具有近似最紧密堆积结构的颗粒单层的制造。此外，发现胶乳颗粒也被吸附到用不具有伯氨基的偶联剂疏水化的玻璃板上，并且在胶乳中加入阳离子或非离子表面活性剂时，吸附被抑制。从本研究中得到的结果，它被披露，在玻璃板表面的粒子单分子膜的制造和结构可以通过改变胶乳浓度和添加的盐浓度，用硅烷偶联剂的表面改性，和向胶乳中添加表面活性剂来控制。

Monodisperse, reactive polymeric microspheres of about 0.2μ m in diameter, which have a high concentration of active ester group at their surfaces, were synthesized by emulsifier-free emulsion copolymeriztion of styrene with methacryloyloxyphenyldimethylsulfonium methysulfate. The fabrication of particle assemblies, supraparticles, from the reactive polymeric microspheres by two methods, adsorption and binding method, was investigated based on their cationic surface charges and high reactivitity towards primary amino groups, respectively, mainly at solid/liquid interface for glass plates. Using the adsorption method, stable particle monolayers were fabricated through dipping the glass plates into a relatively high concentration of the aqueous particle dispersion, latex, containing a low concentration of added salt, NaCl. For the system, the particle monolayers of a more densely packed structure were formed by repeating several times cycles of dipping the adsorbed particle layers into the aqueous solution of sodium dodecylsulfate and then the latex. On the other hand, using the binding method, the fabrication of particle monolayers with an approximately closest packed structure was accomplished by dipping the glass plate surface-aminated with silane coupling agent bearing primary amino group into a low concentration of latex containing a relatively high concentration of the added salt. Furthermore, the latex particles were found to be also adsorbed onto the glass plate hydrophobized with coupling agents having no primary amino groups and the adsorption was inhibited on adding cationic or nonionic surfactants into the latex. From the results obtained in the present studies, it was disclosed that the fabrication and the structure of particle monolayers at the surface of glass plate can be controlled by changing the latex concentration and the added salt concentration, the surface modification with silane coupling agents, and the addition of surfactants into the latex.