作　　者： ; ; ;

机构地区： 广东药学院药科学院

出　　处： 《化学通报》 2007年第5期388-391,共4页

摘　　要： 研究了甲醛、环氧氯丙烷交联壳聚糖树脂(AECTS)对Hg2+的吸附行为和吸附Hg2+对树脂结构及性能的影响。用FT-IR、XRD、TG、DSC和SEM对吸附产物进行了结构表征,并深入分析了AECTS与Hg2+之间的作用机理。结果表明,Hg2+与AECTS中的氨基发生配位、与AECTS中的羟基形成离子键而被吸附;AECTS吸附Hg2+后,结晶度下降,总体上热稳定性变差;Hg2+对AECTS的主链分解具有明显的催化功能;Hg2+的成键使得AECTS的表面形态发生了改变。 The adsorption properties of chitosan erosslinked by aldehyde and epiehlorohydrln（AECTS） with Hg^2＋ and the influence of Hg^2＋ on the AECTS structure and performance were investigated. The structure of adsorption products was characterized by Fourier transform IR, XRD, TG, DSC and SEM. The results showed that the adsorption was realized by binding-NH2 and-OH groups in AECTS with Hg^2＋ . Compared with AECTS, the structure and properties of AECTS- Hg^2＋ had been markedly changed. Its erystallinity and generally thermal stability decreased. The metal ion had evident catalyzing function for the decomposition of AECTS main chains. The morphology studies by SEM showed the surface morphology of the loaded AECTS had been changed dramatically.

关 键 词： 交联壳聚糖 配位吸附机理

领　　域： [理学] [理学]