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

两亲性分子组成的分子组装体中化学反应诱导结构形成的研究

基本信息

批准号：
09650827
负责人：
ADACHI Motonari
金额：
$ 2.24万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

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

利用由两亲分子组成的分子组装体研究了化学反应诱导的结构形成。(1)研究了高分子混合物和分子组装体的平衡结构。将聚丙烯酸溶于双十二烷基二甲基溴化铵（DDAB）反胶束相，聚烯丙基胺溶于琥珀酸二（2-乙基己基）酯磺酸钠（AOT）反胶束相。在这两种情况下，分子组装体的几何形状没有被聚合物的溶解改变，表明分子组装体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，研究了两亲分子在高浓度下的聚合形成结构。通过苯乙烯的聚合，反六方结构变得更强。此外，反六边形结构中的圆柱体的轴的取向是由电场控制的。(3)组织形成 ...更多信息在DDAB/环己烷/正硅酸乙酯（TEOS）反胶束体系中研究了硅酸盐的聚合反应。二氧化硅在酸性条件下形成初级粒子，形成珍珠项链状的团簇，用氢氧化钠中和后，团簇转变为具有一定支链的线性二氧化硅结构。溶液变成透明凝胶。线性二氧化硅结构的直径接近于在没有TEOS的情况下的DDAB-圆柱形反胶束的直径，表明胶束起模板作用。另一方面，在碱性条件下形成大的球形胶体颗粒，并且胶束不起模板作用。(4)以正胶束为模板，研究了硅酸盐在十二胺（LA）/正硅酸乙酯（TEOS）体系中聚合形成微结构的过程。在酸性条件下形成了二氧化硅纳米管，并阐明了其形成过程。各种形态的微结构形成与pH值的变化。形态与pH值的变化可以解释考虑到的依赖性的水解和缩合反应速率的TEOS pH值和LA的状态对pH值的依赖性。此外，液-液界面的重要作用，形成集成有序的微结构被示出。少