重氮树脂-磷酸化聚乙烯醇感光性自组装超薄膜  

PHOTOSENSITIVE SELF-ASSEMBLED ULTRATHIN FILM BASED ON DIAZORESIN AND PHOSPHORYLATED POLY(VINYL ALCOHOL)

作　　者：李琪[1] 欧阳贱华[1] 陈金玉[1] 曹维孝[1] 

机构地区：[1]北京大学化学与分子工程学院,北京100871

出　　处：《高分子材料科学与工程》2003年第5期201-203,207,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金(50173002)资助项目

摘　　要：将聚乙烯醇磷酸化,形成的部分磷酸化的聚乙烯醇(PPVA)是带有侧链磷酸基的聚负离子,与光敏性聚正离子-重氮树脂(DR)可形成自组装超薄膜。此类感光性超薄膜光照后,由于重氮基的分解,组装膜内部层增层发生由离子键转变为共价键交联,膜的稳定性大大提高。用原子力显微镜观察了自织装膜的表面形貌。Phosphorylated poly(vinyl alcohol)(PPVA) was obtained from phosphorylation of poly(vinyl alcohol). A photosensitive ultrathin film with diazoresin(DR) as polycation and PPVA as polyanion was fabricated using self assembly technique. The formation of the multilayer was monitored by determining the UVVis absorbance of DR. The surface morphology of the multilayer film was observed by atomic force microscopy(AFM). Under UV irradiation, a linkage conversion from ionic to convalent bond takes place, as a result, the stability of the film towards etching from polar solvents increases obviously. This method may provide a promising way for the fabrication of the stable films used in biosensors.

关 键 词：重氮树脂 磷酸化聚乙烯醇 感光性 自组装超薄膜 

分 类 号：O484.1[理学—固体物理] TQ325.9[理学—物理]