聚乙二醇在Al_(2)O_(3)/水界面吸附行为的ESR研究  

THE ESR INVESTIGATION ON ABSORPTION BEHAVIOUR OF POLYETHYLENE GLYCOL AT Al_(2)O_(3)/WATER INTERFACE

作　　者：李国希[1] 邓姝皓[1] 夏笑虹[1] 旷亚非[1] 黄树坤[1] 

机构地区：[1]湖南大学化学化工学院,长沙410082

出　　处：《波谱学杂志》2000年第6期495-499,共5页Chinese Journal of Magnetic Resonance

基　　金：国家自然科学基金资助项目(29773012)

摘　　要：采用电子自旋共振技术结合自旋标记研究了聚乙二醇在Al2 O3/水界面的分子构型和运动行为 .结果表明 ,聚乙二醇在Al2 O3上的吸附等温线呈S型 ,吸附量随聚乙二醇分子量增加而减小 ,聚乙二醇在Al2 O3表面是多点吸附 ,分子中的大部分链节平躺在Al2 O3表面。The molecular configuration and motion behaviour of polyethylene glycol (PEG) at Al\-2O\-3/water interface were investigated by using the electron spin resonance (ESR) technique, coupled with spin label technique. The adsorption isotherms of PEG on the Al\-2O\-3 surface were of S type and the amount of adsorption decreased with the increas of molecular weight. The adsorption of PEG on the Al\-2O\-3 surface was of the multipoint adsorption, where most segments of PEG were bound to the surface and a few residual segments were dangling in the solution.

关 键 词：吸附 ESR 聚乙二醇 

分 类 号：O632.31[理学—高分子化学] O647.3[理学—化学]