壳聚糖的辐射效应的研究(Ⅱ)——辐射引起的某些化学变化  

Studies on Radiation Effect of Chitosan (Ⅱ)--Some of the Chemical Changes Induced by Irradiation

作　　者：赵文伟[1] 于黎[1] 钟晓光[1] 张月芳[1] 孙家珍[1] 王强[2] 

机构地区：[1]中国科学院长春应用化学研究所,长春130023 [2]东北师范大学分析测试中心

出　　处：《高等学校化学学报》1993年第6期868-871,共4页Chemical Journal of Chinese Universities

基　　金：中国科学院上海原子核研究所辐射化学开放实验室资助

摘　　要：壳聚糖分子中的脱乙酰基单元比乙酰化单元更易被高能辐射破坏。红外光谱的研究结果表明,羟基基团的吸收强度随辐射强度的增加而增加,胺基和醚键的吸收强度则下降。壳聚糖辐照后并未发现有羰基形成。壳聚糖在辐照作用下除了胺基的变化外,主要通过苷键的断裂降解。Partially deacetylated chitosan powders were subjected to γ-ray irradiation in the controlled volume of air. Thermogravimetric analyses indicate that the thermal stability of chitosan decreases after irradiation. The results of infrared spectrum investigation show that hydroxyl group increases with the increase of radiation dose while C-O-C group decreases, and the deacetylated moiety is more sensitive to irradiation than acetylated moiety. No evidence for carbonyl formation was observed. Main chain scission and reactions of amino group are the main chemical changes of chitosan under irradiation.

关 键 词：壳聚糖 辐射效应 胺基 热重分析 

分 类 号：O636.1[理学—高分子化学]