海藻酸钠溶液溶胶-凝胶相转变过程的光谱学研究  

SPECTROSCOPIC INVESTIGATIONS ON SOL GEL TRANSITION OF ALGINATE SOLUTIONS BY ADDITION OF CUPRIC ION

作　　者：郑洪河[1,2] 王利亚 张虎成[1,2] 张庆芝 杨书廷 王键吉[1,2] 

机构地区：[1]河南师范大学化学系 [2]河南洛阳高等师范专科学校化学系

出　　处：《光谱学与光谱分析》1998年第5期547-550,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金

摘　　要：以粘度法和１３Ｃ－ＮＭＲ、ＵＶ、Ｒａｍａｎ光谱学方法研究了海藻酸钠溶液溶胶－凝胶相转变过程，结合体系的光谱学特征，分析了体系相转变过程中海藻酸单体官能基与二价铜离子间的结合情形、分子链的构型变化以及与之紧密相关的溶剂行为。Viscosity measurements and 13 C NMR,UV/VIS,and Raman spectroscopic studies have been carried out of various concentration of alginate solutions undergoing sol gel transition induced by addition of cupric cation.From analyses of the spectra,a qualitative explaination was suggested of the interaction mode of the coordination between functional groups and cupric ions,the conformational change of polychains and the behaviour of solvent molecules druing the process of sol gel transition.The mechanisms of phase transition of our system induced by the heavy metal ion have been discussed.

关 键 词：海藻酸钠 溶胶-凝胶 相转变 凝胶化 铜离子 光谱 

分 类 号：O636.1[理学—高分子化学] O648.17[理学—化学]