磺化POSS的合成及其与聚电解质的组装  

Preparation of Sulfonated POSS and Its Electrostatic Assembly with Polyelectrolyte

作　　者：武国军[1,2] 苏朝晖[1] 

机构地区：[1]中国科学院长春应用化学研究所,高分子化学与物理国家重点实验室,长春130022 [2]中国科学院研究生院,北京

出　　处：《应用化学》2008年第3期270-275,共6页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(50403008,20423003);基金委创新群体(50621302)资助项目

摘　　要：合成了具有立方笼状结构的磺化八苯取代倍半硅氧烷(SOPS),经红外光谱(FTIR)及核磁共振波谱(NMR)分析,确认了产物的结构。用携带负电荷的SOPS与聚丙烯胺(PAH)进行层层组装,制备了纳米复合超薄膜。通过改变PAH溶液的pH值调节SOPS与PAH的组装行为,用石英晶体微重量天平(QCM)、紫外可见光谱(UV-V is)、接触角(CA)及X射线光电子能谱(XPS)等测试技术研究了组装过程。结果发现,SOPS作为一种寡电荷小分子,在与PAH进行组装时有脱落现象发生,但是在合适的条件下仍然可以实现SOPS与PAH的均匀增长,制得复合多层膜。Octa（phenyl） silsesquioxane （ POSS）, a cubic cage-like nano particle was modified to introduce negative charges to the particle via sulfonation, and the structure of the sulfonation product, SOPS, was confirmed by FTIR and NMR. Ultra-thin hybrid films were fabricated via layer-by-layer self-assembly of the SOPS and poly （allylamine） （PAH）. The assembly process was studied by quartz crystal microgravimetry （QCM）, UV-Vis spectroscopy, contact angle （CA） measurement, and X-ray photoelectron spectroscopy （XPS）. The deposited oligo-charged SOPS was found to desorb when in contact with PAH solution. However, when the assembly was carried out at higher pH, the desorption of SOPS was effective suppressed, and SOPS/ PAH multilayers were obtained. This provides a facile and effective approach to fabrication of hybrid thin films containing inorganic nano particles.

关 键 词：层层组装 聚倍半硅氧烷(POSS) 聚电解质 复合多层膜 

分 类 号：O631[理学—高分子化学]