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Control and Design of Nano-Materials Produced with the Help of Amphiphilic Molecules Assemblies

两亲性分子组装体生产纳米材料的控制和设计

基本信息

批准号：
08455356
负责人：
HARADA Makoto
金额：
$ 4.99万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

We elucidated the formation processes and the control method of the microstructures in nano-meso materials, which were prepared using self-organized assemblies of amphiphilic molecules. 1) Nano-meso porous materials : We elucidated the microstructure formation processes in silicon alkoxide(TEOS)/surfactant(laurylamine) composite systems. In acidic aqueous solution, nano-meso network structure composed of silica rods is formed, and in neutral aqueous solution, aerogel-like silica structure is obtained. Whereas in alkaline aqueous solution, cylinder-hexagonal and/or cubic ordered structures of silica can be prepared. The rate-ratio of TEOS-hydrolysis to condensation reaction plays an important role in the formation of these different microstructures. The structure formation at the microstructure interface is also important for the ordered structures. We elucidated the effect of the microstructure interface on the TEOS hydrolysis using reversed micellar system. Based on these results, we succeeded in the preparation of very long silica-tubules with nanometer diameter. 2) Bicontinuous nano-materials of polymers : The structure of reversed micelles was elucidated in the systems composed of ionic surfactants and the polymers with reverse electric charge. This result provides some information on designing bicontinuous materials. We also succeeded in the preparation of bicontinuous polymer materials with hydrophilic passes using hexagonal structure of ionic surfactant as the template. 3) Nano-particle materials with two-dimensional array : We focused on the preparation of nano-particles and the control of the size-distribution of the obtained particles, which can be used for two-dimensional array. Systematic studies were performed for the growth processes of CdS- and Au-nanoparticles in reversed micellar solution. Using the results, we succeeded in the preparation of nano-particles with sharp size-distribution.

阐述了两亲分子自组装制备纳米介观材料的微结构形成过程和控制方法。1)纳米介孔材料：我们阐明了硅醇盐（TEOS）/表面活性剂（月桂胺）复合体系中微观结构的形成过程。在酸性水溶液中，形成了由二氧化硅棒组成的纳米-介观网络结构;在中性水溶液中，得到了气凝胶状的二氧化硅结构。而在碱性水溶液中，可以制备圆柱-六方和/或立方有序结构的二氧化硅。TEOS水解与缩合反应的速率比在这些不同微结构的形成中起着重要的作用。微结构界面处的结构形成对于有序结构也是重要的。利用反胶束体系研究了微结构界面对正硅酸乙酯水解反应的影响。在此基础上，我们成功地制备出了纳米级的超长硅管。2)聚合物双连续纳米材料：阐明了离子型表面活性剂与带反向电荷聚合物组成体系中的反胶束结构。这一结果为双连续材料的设计提供了参考。我们还成功地以六方结构的离子表面活性剂为模板制备了具有亲水孔道的双连续高分子材料。3)二维阵列纳米粒子材料：我们主要研究了二维阵列纳米粒子的制备和粒径分布的控制。系统研究了CdS和Au纳米粒子在反胶束溶液中的生长过程。利用这些结果，我们成功地制备了具有尖锐尺寸分布的纳米颗粒。