棉纤维素辐射改性研究 Ⅱ.溶胀剂和碱度对纤维素辐射降解的影响  

STUDY ON RADIATION MODIFICATION OF CELLULOSE Ⅱ. EFFECTS OF SWELLING AGENTS AND BASICITY IN MEDIA ON RADIOLYSIS OF CELLULOSE

作　　者：哈鸿飞[1] 郑静怡[1] 张钰华[1] 沈勤长[2] 吴季兰[1] 

机构地区：[1]北京大学技术物理系 [2]石油勘探开发科学研究院钻井所

出　　处：《同位素》1991年第1期41-44,共4页Journal of Isotopes

摘　　要：纤维素辐射接枝反应为自由基机理。本文研究了纤维素辐解生成的自由基,发现它们在较浓的碱性介质中消失得很快。因此,纤维素辐射改性难以在碱性介质中完成。另外,为控制纤维素辐射降解程度,维持较高的分子量,本文还研究了不同溶胀剂对纤维素辐解的影响。结果表明它们对纤维素辐射降解有不同程度的抑制作用,1/_η与剂量呈线性关系。In the present work, radiation-induced free radicals of cellulose were investigated. It was found that the radicals were very unstable in basic media and it is very important in radiation modification of cellulose. The effects of swelling agents (water, iso-propyl alcohol, benzene) on radiolysis of cellulose were studied. The results showed that the swelling agents had protective effects to a certain extent and the radiation degredation of cellulose in the swelling agents obeyed the Charlesby' s equation.

关 键 词：棉纤维素 辐射降解 羧甲基纤维素 

分 类 号：TS102.211[轻工技术与工程—纺织工程]