棉纤维素电子束辐射降解效应研究
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摘要
以棉浆粕纤维为原料,进行电子束辐射降解,考察辐射剂量对棉纤维素的影响。采用XRD对纤维素结晶度进行表征。结果显示,电子束辐射可以有效降解棉纤维素,随着辐射剂量的增大,棉纤维素聚合度迅速降低。棉纤维素电子束辐射降解存在后效应。辐照后7日内,聚合度仍继续显著降低,7日后趋缓,至12日降解反应基本终止。XRD测试结果显示,棉纤维素受辐照后结晶度降低。
Wood pulp fibers are used as raw materials and after degradation by electron beam radiation,the effects of radiation dose on cotton cellulose are investigated. Cellulose crystallinity are characterized by XRD. The results show that electron beam radiation can effectively degrade cotton cellulose. With the increase of radiation dose, cotton cellulose polymerization degree decrease rapidly. The electron beam radiation degradation of cotton cellulose has the post effect. The degree of polymerization continues to reduce inarkedly in 7 days after radiation,slow down after 7 days,on the 12 th day after irradiation,the degradation reaction basically stopped. The results of XRD test shows,crystallinity reduce cotton cellulose after radiation.
Wood pulp fibers are used as raw materials and after degradation by electron beam radiation,the effects of radiation dose on cotton cellulose are investigated. Cellulose crystallinity are characterized by XRD. The results show that electron beam radiation can effectively degrade cotton cellulose. With the increase of radiation dose, cotton cellulose polymerization degree decrease rapidly. The electron beam radiation degradation of cotton cellulose has the post effect. The degree of polymerization continues to reduce inarkedly in 7 days after radiation,slow down after 7 days,on the 12 th day after irradiation,the degradation reaction basically stopped. The results of XRD test shows,crystallinity reduce cotton cellulose after radiation.
引文
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[3]谌恩华,吴华伟,李相前.结晶纤维素的降解[J].草业科学,2016,33(11):2367-2374.
[4]赵玮.固体酸催化玉米皮半纤维素水解及产物综合利用研究[D].吉林:吉林农业大学,2016.
[5]覃忠严.超声波协同TEMPO氧化法制备纳米纤维微晶的研究[D].南京:南京林业大学,2011.
[6]姜凯.微生物生产纤维素酶的生产技术及应用前景[J].青海畜牧兽医杂志,2017,47(3):53-55.
[7]李红亚,李文,李术娜,等.解淀粉芽孢杆菌复合菌剂对玉米秸秆的降解作用及表征[J].草业学报,2017,26(6):153-167.
[8]薛林贵,杨蕊琪,马高高,等.秸秆的生物降解机理及其功能微生物菌群研究进展[J].生态科学,2017,36(3):193-199.
[9]宋佳臻,戚大伟,刘继云,等.微波-超声波辅助水解稻草制备微晶纤维素[J].安徽农学通报,2014,20(5):10-12.
[10] JALBERT J,LACASSE R,KHAKANI M A El,et al. Accelerated ageing of wood Kraft insulating paper by means of a pulsed KrF excimer laser radiation[J]. Applied Physics A,2005,81(1).
[11]程博闻.电子束处理在纤维素纤维改性及生产中的应用[J].广西化纤通讯,2000(2):32-34.
[12]宫宁瑞,刘继华,常德华.辐射降解棉纤维素的研究现状[J].火炸药学报,1999,22(1):70-72.
[13] SOTITON M, CHATELIN R. Electron beam grafting of cellulose fibers[J]. World Textile Technology, 1991(1):527.