Study on Structure Formation Induced by Chemical Reactions in Molecular Assemblies Composed of Amphiphilic Molecules

用两亲分子组成的分子组合研究了化学反应诱导的结构形成。(1)研究了聚合物和分子组合混合物的平衡结构。聚丙烯酸溶解在二十二烷基二甲酰胺（DDAB）组成的反胶束相中，聚烯丙胺溶解在二（2-乙基己基）琥珀酸磺酯钠（AOT）的胶束相中。在这两种情况下，分子组合的几何形状都没有因聚合物的溶解而改变，这表明分子组合作为模板使用的可能性。(2)利用AOT/苯乙烯/水体系中形成的液晶，研究了两亲性分子在高浓度条件下的聚合结构形成。通过苯乙烯聚合，反六边形结构变得更强。此外，还利用电场控制了反六边形结构圆柱体的轴线方向。(3)研究了DDAB/环己烷/四乙氧基硅烷（TEOS）组成的反胶束体系中硅酸盐聚合的微观结构形成。在酸性条件下形成原生二氧化硅颗粒，形成珍珠项链状的团簇，经氢氧化钠中和后，形成具有部分分支的线性二氧化硅结构。溶液变成透明的凝胶。在没有TEOS的情况下，线性二氧化硅结构的直径与ddab -圆柱形反胶束的直径接近，表明该胶束具有模板作用。另一方面，在碱性条件下形成较大的球形胶体颗粒，胶束不能作为模板。(4)以正胶束为模板，研究了十二烷基胺(LA)/ TEOS体系中硅酸盐微观结构的形成过程。在酸性条件下制备了二氧化硅纳米管，并对其形成过程进行了分析。随着pH的变化，微观结构形成了不同的形态。微观结构随pH的变化可以通过考虑TEOS的水解缩合反应速率随pH的变化以及LA的状态随pH的变化来解释。进一步表明了液-液界面对形成完整有序微观结构的重要作用。少

Structure formation induced by chemical reactions was studied using molecular assemblies composed of amphiphilic molecules. (1) We studied on the equilibrium structure of mixtures of polymers and molecular assemblies. Poly (acrylic acid) were dissolved in the reverse micellar phase composed of didodecyldimethylammonium brimide (DDAB) and poly (allylamine) was dissolved in that of sodium bis (2-ethylhexyl) sulfosuccinate (AOT). In both cases, the geometrical shape of molecular assemblies was not changed by dissolution of polymers, indicating possibility for usage of molecular assemblies as template. (2) Structure formation by polymerization was investigated under high concentrations of amphiphilic molecules using liquid crystals formed in AOT/styrene/water system. The reverse hexagonal structure became stronger by polymerization of styrene. Furthermore, the orientation of the axis of cylinders in reverse hexagonal structure was controlled by electric field. (3) Microstructure formation … More by polymerization of silicates was investigated in reverse micellar system composed of DDAB/cyclohexane/tetraethoxysilane (TEOS). Primary particles of silica was formed under acidic conditions and made clusters like pearl necklace, which were converted to linear silica-structure with some branches by neutralization with sodium hydroxide. The solution became transparent gel. The diameter of the linear silica-structure was close to that of DDAB-cylindrical reverse micelles in the absence of TEOS, indicating that the micelles functioned as a template. On the other hand, large spherical colloidal particles were formed in alkaline conditions, and the micelles did not work as template. (4) Formation processes of microstructure by polymerization of silicates was investigated in laurylamine (LA)/ TEOS system using normal micelles as template. Silica-nanotubes were formed in acidic conditions, and the formation processes were elucidated. Various morphologies of microstructure were formed with variation in pH. The variation in morphologies with pH can be explained by taking into account the dependency of hydrolysis and condensation reaction rates of TEOS upon pH and also the dependency of state of LA on pH. Further, the important role of liquid-liquid interface for formation of integrated ordered microstructure was shown. Less