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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、少部分链节伸向溶液
The molecular configuration and kinetic behavior of polyethylene glycol at Al 2 O 3 / water interface were studied by using electron spin resonance and spin labeling. The results showed that the adsorption isotherm of polyethylene glycol on Al 2 O 3 was S-type and adsorbed The amount of polyethylene glycol decreases with the increase of molecular weight, polyethylene glycol in the surface of Al2 O3 is multi-point adsorption, the majority of molecules in the chain lying on the Al2 O3 surface, a small part of the chain extending to the solution