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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.

阐述了由两亲分子自组织组装而成的纳米介观材料微结构的形成过程和控制方法。1)纳米介孔材料：阐述了硅醇盐(TEOS)/表面活性剂(月桂胺)复合体系的微结构形成过程。在酸性水溶液中形成由二氧化硅棒组成的纳米介观网络结构，在中性水溶液中形成气凝胶状的二氧化硅结构。而在碱性水溶液中，可以得到柱状-六方和/或立方有序结构的二氧化硅。在这些不同的微观结构的形成过程中，正硅酸乙酯的水解与缩合反应的速率比起着重要的作用。微结构界面的结构形成对有序结构的形成也很重要。用反胶束体系研究了微结构界面对正硅酸乙酯水解的影响。基于这些结果，我们成功地制备了直径为纳米级的超长二氧化硅管材。2)聚合物的双连续纳米材料：在离子表面活性剂与带反向电荷的聚合物组成的体系中，阐明了反胶束的结构。这一结果为双连续材料的设计提供了一些信息。我们还以离子表面活性剂的六方结构为模板，成功地制备了具有亲水通道的双连续聚合物材料。3)二维阵列纳米颗粒材料：重点研究了纳米颗粒的制备和颗粒尺寸分布的控制，可用于二维阵列。系统地研究了硫化镉和金纳米粒子在反胶束溶液中的生长过程。利用这一结果，我们成功地制备出了尺寸分布均匀的纳米粒子。