1.浙江省能源与核技术应用研究院杭州 310012
2.浙江大学杭州 310058
[ "李兆龙, 男, 1982年6月出生, 2008年于中国科学院近代物理研究所获理学硕士学位, 现从事高分子材料的辐射改性工作, 助理研究员, E-mail:lzhaolong@163.com", "LI Zhaolong (male) was born in June 1982, and received his master’s degree from Institute of Modern Physics, CAS, in2008. Now he is an assistant researcher engaging in the irradiation modification of polymer materials" ]
章月红, 工程师, E-mail:hzzhangyuehong@126.comZHANG Yuehong, engineer, E-mail:hzzhangyuehong@126.com
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李兆龙, 汪瑛琦, 谢裕颖, 等. 壳聚糖的敏化辐射降解[J]. 辐射研究与辐射工艺学报, 2017,35(1):10302.
Zhaolong LI, Yingqi WANG, Yuying XIE, et al. Irradiation and sensitizing effects on chitosan degradation[J]. Journal of Radiation Research and Radiation Processing, 2017,35(1):10302.
李兆龙, 汪瑛琦, 谢裕颖, 等. 壳聚糖的敏化辐射降解[J]. 辐射研究与辐射工艺学报, 2017,35(1):10302. DOI: 10.11889/j.1000-3436.2017.rrj.35.010302.
Zhaolong LI, Yingqi WANG, Yuying XIE, et al. Irradiation and sensitizing effects on chitosan degradation[J]. Journal of Radiation Research and Radiation Processing, 2017,35(1):10302. DOI: 10.11889/j.1000-3436.2017.rrj.35.010302.
采用电子束辐照与敏化剂协同降解粉体壳聚糖,以制备具有良好生物活性的低分子量粉体壳聚糖。使用凝胶渗透色谱仪对壳聚糖的分子量进行测定;通过傅里叶变换红外光谱和X-射线衍射仪分别对降解后壳聚糖的化学性能包括主链结构和结晶度进行表征。实验结果表明,降解后的壳聚糖主链结构无明显变化,结晶度随分子量的减小而增大;在敏化剂存在的条件下,较低的吸收剂量(20 kGy)即可有效地降解粉体壳聚糖,得到数均分子量(,M,n,)为1 170的低分子量产物,且降解速率增大至1.51×10,-5,。
Interaction systems of electron beam irradiation and sensitizers were used to degrade wet chitosan powder for preparing chitosan with low molecular weight and well biological activity. The degraded molecular weight of the sample was characterized by gel permeation chromatography (GPC), and chemical characteristics including main chain structure and crystallization were determined by Fourier transform infrared spectroscopy (FTIR) and X ray diffraction (XRD), respectively. The experimental results showed that no obvious change generates in the main chain structure of the degraded chitosan, and the crystallization increased with the decreasing molecular weight. With the presence of sensitizers, the degraded molecular chitosan can be decreased from 1.1×105 to 1 170 at low absorbed dose of 20 kGy with higher rates of 1.51×10,-5,.
壳聚糖辐射降解敏化剂分子量
ChitosanIrradiation degradationSensitizerMolecular weight
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