^(60)Co γ射线辐照剂量对明胶特性和结构的影响  

Effect of Dosage on Property and Structure of Gelatin Irradiated by ^(60)Co γ-ray

作　　者：耿胜荣[1,2,3] 汪兰[1,2,3] 廖涛[1,2,3] 夏和舟[1,2,3] 

机构地区：[1]湖北省农业科学院农产品加工与核农技术研究所,湖北武汉430064 [2]湖北省农产品辐照加工中心,湖北武汉430064 [3]湖北省农业科技创新中心,湖北武汉430064

出　　处：《原子能科学技术》2014年第3期512-517,共6页Atomic Energy Science and Technology

基　　金：国家自然科学基金青年项目资助(11105048)

摘　　要：本文以0~60kGy 60 Coγ射线辐照的明胶为对象,研究了辐照剂量与明胶的黏度、胶凝特性、力学性能、蛋白组分、分子质量的关系。结果表明:明胶的特性黏度、相对黏度、凝胶强度、断裂伸长率、分子质量与剂量呈良好的负相关;明胶的γ、β、α链含量随剂量的增加而减少,大分子链的降解伴随着小分子多肽链混合物的增加,相对分子质量分布逐渐加宽;明胶膜的断裂强度升高而断裂伸长率下降;辐照后明胶表面结构致密而平滑。在有限水和无限氧气存在条件下,辐照明胶以降解为主,同时伴随着少量的交联,剂量越大,反应程度越高。The gelatin was irradiated for 0-60 kGy dosages by 60Co γ-ray . The relationship of dosage and properties including viscosity , gel strength , mechanical property ,molecular weight and protein component was discussed . The results show that there is a negative correlation between the dosage and intrinsic viscosity ,relative viscosity ,gel strength and molecular weight .With the increase of irradiation dosage , the γ,β,αchain content of gelatin decreases but the small molecules content increases , and relative molecular weight distribution changes wider .The elongation decreases but tensile strength of gelatin film increases . Compared with no irradiation one , the irradiation gelatin has more compact and smooth surface texture .It is assumed that＆amp;nbsp;when the limited water and oxygen exist during the irradiation process ,cross-linking and degradation of gelatin molecular produce simultaneously and the main reaction is cross-linking .The reaction degree increases with the dosage .

关 键 词：60COγ辐照 明胶 分子质量 分解 交联 

分 类 号：TL99[核科学技术—核技术及应用]