聚离子复合物单分子膜的聚集结构研究

LB膜在非线性光学材料、生物传感器等众多领域有着诱人的应用前景,受到了广泛的关注.为了充分发挥LB 膜的功能,必须制备高度取向、无缺陷的LB 膜,因此充分把握LB膜的构成单元单分子膜的聚集结构显得十分重要.由于气液界面离子复合结构的形成对单分子膜的聚集结构产生很大的影响,近年,有关这方面的工作越来越活跃.本文以探讨

STUDIES ON THE AGGREGATION STATES OF POLYION COMPLEX MONOLAYER

The aggregation structure of monolayer was discussed by the observations ofelectron diffraction patterns and bright field images.When 2C_(14)SNa was spread onpure water surface,a homogeneous monolayer was formed before compressing as theresult of electrostatic repulsion among hydrophilic anionic groups,the crystallizationwas occurred in the process of compressing,i.e.,it was a compressing crystallizedmonolayer.When 2C_(14)SNa was spread on PEI solution surface,a crystalline monolayerwith an un-oriented domain structure was formed before compressing as the resultsof anchoring effect of ion complex and the weakened electrostatic repulsion,theorientation was occurred in the process of compressing,i.e.,it was a compressingoriented crystalline monolayer.The formation of polyion complex at the air/waterinterface greatly affected the aggregation state of monolayer.