羧酸化β-环糊精与重氮树脂自组装超薄膜  

Layer-by-Layer Self-Assembly Thin Film Based on Carboxymethyl-β-Cyclodextrins and Diazoresin

作　　者：支俊格[1] 田旭玲[1] 佟斌[2] 徐秀玲[1] 赵玮[2] 石建兵[2] 董宇平[2] 

机构地区：[1]北京理工大学理学院,北京100081 [2]北京理工大学材料科学与工程学院,北京100081

出　　处：《北京理工大学学报》2008年第1期85-89,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(20504005)

摘　　要：通过控制反应条件,由β-环糊精制备了不同取代度的羧酸化β-环糊精(CM--βCD),用核磁氢谱表征了其结构及羧酸化取代度.并以此为聚阴离子、光敏性聚合物-重氮树脂(DR)为聚阳离子.基于离子间相互作用,制备了层-层自组装超薄膜,研究了羧酸化取代度、溶剂离子强度、浓度以及pH值对组装膜的影响.实验结果表明:每一自组装循环中,聚离子的沉积量是相等的,并随着羧酸化取代度、溶剂离子强度的增加而增加;但CM--βCD溶液的浓度和pH值对组装膜结构产生的影响很小.在UV光照下,利用重氮盐的光分解使层-层之间形成共价交联,有效提高了膜的稳定性.Carboxymethyl-β-cyclodextrins （CM-β-CDs） having different carboxymethylated degrees were synthesized. Their structures and carboxymethylated degrees were characterized by 1H-NMR. A self-assembled multilayer thin-film was fabricated with CM-β-CD as an anion and photosensitive diazoresin （DR） as a polycation based on ionic interaction. The quantity of deposition of self-assembled CM-β-CD/DR films increased with increasing the degree of carboxymethylation of CM-β-CD and the ionic strength of solvent from which CM-β-CD deposited. However, the concentration and pH value of the CM-β-CD aqueous solution had little effect on the self-assembled multilayer films. Under UV irradiation, following the decomposition of diazonium group between the adjacent interfaces of the multilayers, the ionic bonds of the self-assembly film converted to covalent bonds, which improves the stablity of the film effectively.

关 键 词：羧酸化β-环糊精 重氮树脂 层一层自组装 

分 类 号：O65[理学—分析化学]