蒸煮温度与碱用量对大麻纤维晶体结构与热性能的影响  

Effect of cooking temperature and concentration of alkali on the crystalline structure and thermal characteristic of hemp fiber

作　　者：俞春华 乔鹏娟[2] 陈勤伟 冯新星[3] 陈建勇[3] 

机构地区：[1]绍兴出入境检验检疫局,国家级纺织品检测重点实验室,浙江绍兴312000 [2]国家知识产权局专利局,北京100088 [3]浙江理工大学,先进纺织材料与制备技术教育部重点实验室,浙江杭州310018

出　　处：《印染助剂》2010年第11期28-31,共4页Textile Auxiliaries

基　　金：浙江检验检疫局科技计划项目(ZK2008071X)

摘　　要：研究了大麻纤维高温脱胶技术,讨论了不同蒸煮温度和碱量处理对大麻纤维晶体结构及热稳定性能的影响.用XRD和TG技术对高温脱胶后的大麻纤维晶体结构和热稳定性能进行了表征.试验结果表明:高温蒸煮处理提高了大麻纤维的结晶度、结晶指数和热稳定性,其结晶度、结晶指数和热稳定性与NaOH的用量及反应温度有关;大麻纤维的热稳定性与纤维的晶体结构有关;其最大速率分解温度的升高可能是受纤维素晶体中更高次序的纤维素结构、晶粒尺寸变大和分子链堆砌紧密程度提高所致.Technique of hemp fibre degumming at high temperature was studied. The effects of temperature and concentration of alkali on the structure and thermal characteristic of hemp fiber were discussed. The structure and thermal degradation of hemp fiber after high temperature treatment was investigated through XRD and TG. The result showed： high temperature cooking treatments could improve the crystallinity, crystallinity index and the thermal stability of hemp fiber. Crystallinity, crystallinity index and thermal stability were relative to temperature and mass fraction of NaOH, and thermal stability of hemp fiber was relative to crystal structure of fiber. And the increased temperature of maximum degradation rate of the treated fiber were likely result from a higher crystalline order of fiber structure, increase of crystallite size and stacking density of the cellulose molecule chains.

关 键 词：大麻纤维 脱胶 结晶指数 热性能 

分 类 号：TQ35[化学工程]