A NOVEL METHOD TO PREPARE CROSSLINKED POLYETHYLENEIMINE HOLLOW NANOSPHERES  

作　　者：何斌 顾忠伟 

机构地区：[1]Engineering Research Center of Biomaterials Sichuan University,National Engineering Research Center for Biomaterials

出　　处：《Chinese Journal of Polymer Science》2007年第5期431-435,共5页高分子科学（英文版）

基　　金：This work was financially supported by the National Basic Research Program of China(National 973 program,No.2005 CB623903).

摘　　要：A novel method to prepare crosslinked polyethyleneimine （CPEI） hollow nanospheres was reported. Uniform silica nanospheres were used as templates, 3-aminopropyl trimethoxysilane （APS） was immobilized on the surface of silica nanospheres as couple agent. Aziridine was initiated ring-opening polymerization with the amino groups in APS to form polyethyleneimine （PEI） shell layer. 1,4-Butanediol diacrylate was utilized to crosslink PEI polymeric shell. The silica nanospheres in core were etched by hydrofluoric acid to obtain hollow CPEI nanospheres. The hollow nanospheres were characterized by X-ray photoelectron spectroscopy （XPS）, transmission electron microscopy （TEM）, and thermogravimetric analysis （TGA）.A novel method to prepare crosslinked polyethyleneimine （CPEI） hollow nanospheres was reported. Uniform silica nanospheres were used as templates, 3-aminopropyl trimethoxysilane （APS） was immobilized on the surface of silica nanospheres as couple agent. Aziridine was initiated ring-opening polymerization with the amino groups in APS to form polyethyleneimine （PEI） shell layer. 1,4-Butanediol diacrylate was utilized to crosslink PEI polymeric shell. The silica nanospheres in core were etched by hydrofluoric acid to obtain hollow CPEI nanospheres. The hollow nanospheres were characterized by X-ray photoelectron spectroscopy （XPS）, transmission electron microscopy （TEM）, and thermogravimetric analysis （TGA）.

关 键 词：Hollow nanospheres POLYETHYLENEIMINE TEMPLATE Crosslink. 

分 类 号：TB383.1[一般工业技术—材料科学与工程]