壳聚糖的γ射线辐射降解研究  

Study on γ-Ray Irradiation Degradation of Chitosan

作　　者：李治[1] 刘晓非[1] 徐怀玉[1] 管云林[1] 姚康德[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072

出　　处：《应用化学》2001年第2期104-107,共4页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金!资助项目 (5 97730 0 2 )

摘　　要：用 γ射线照射壳聚糖使之发生辐射降解 ,研究了降解反应的动力学、辐射对壳聚糖脱乙酰化度的影响以及大分子链的断链机理 .结果表明 :壳聚糖在γ射线照射下发生的辐射降解遵循无规降解动力学规律 ;降解过程中壳聚糖的脱乙酰化度略有升高 ;降解反应主要由壳聚糖分子链上的 C1 — O— C4键断裂引起 ,在降解过程中生成了 δ-内酯结构的端基 .Chitosan was degraded by ~60Co γ-ray irradiation. The degradation kinetics, effect of irradiation on the degree of deacetylation(DE) of chitosan and the main chain scission mechanism have been studied. The results showed that the irradiation degradation of chitosan obeys the rule of random degradation. On irradiaton, DE was slightly raised and some of the C_1—O—C_4 bonds broke. Terminal groups with structure of δ-lactone appeared produced during degradation.

关 键 词：壳聚糖 辐射降解 动力学 无规降解 断链机理 Γ射线 

分 类 号：O636.1[理学—高分子化学]