摘要
为解决棉秆皮纤维精细化过程中强度受损的共性问题,研究了阳离子改性剂DETA辅助棉秆皮纤维单细胞定向剥离的可行性。利用DETA分子结构较大、在纤维束径向渗透慢的特点,实现纤维束表层阳离子化,从而使后续过氧化氢脱胶行为控制在纤维束外侧,减少纤维强度受损。研究发现:质量分数为9%的DETA可促进束纤维单细胞定向剥离。采用9%DETA方案获得的棉秆皮纤维细度可改善至19.6 dtex,强度保持在3.8 cN/dtex的较高水平,优于目前已报道的碱、碱/过氧化氢或微生物脱胶法。此外,XRD、红外、TG及单细胞形态分析结果证实:采用9%DETA方案得到的纤维内部胶质得以保留,而表面半纤维素及部分木质素被去除,表明单细胞是沿纤维束径向从外向内逐步剥离的。研究结果对富木质素纤维的提取和高值化利用具有一定的参考价值。
To solve the problem of the fiber-strength loss during the extraction of cotton stalk fibers,the feasibility of the directional degumming on the cotton stalk fibers is studied with the assistance of cationic modifier DETA.With the help of the large molecular structure of the modifier and its low penetration rate in the radial fiber direction,the goal of surface cationic is achieved.Thus,the subsequent degumming behavior of hydrogen peroxide is controlled in the outer layer of the fiber bundles,and the damage of the fiber strength is reduced.The results show that directional degumming phenomenon of bundle fibers can be achieved by using a 9%modifier DETA.The fibers obtained have a fineness improved to 19.6 dtex and strength maintained at a high level of 3.8 cN/dtex,which are far better than the corresponding data achieved in the method of alkali,alkali/hydrogen peroxide and microbial degumming.In addition,the results of XRD,IR,TG and cell morphology show that the gum inside the fibers prepared with 9%DETA is retained,while the hemicellulose and partial of lignin substances are removed from the fiber surface.This phenomenon suggests that the single cells are stripped from the outer layer to the inner layer along the radial direction of the fiber bundles.The result can provide an important reference for the extraction and high-value utilization of the lignocellulosic fibers.
作者
董震
丁姜鑫
刁平灏
蔡丹满
聂李鑫
DONG Zhen;DING Jiangxin;DIAO Pinghao;CAI Danman;NIE Lixin(School of Textile and Clothing,Nantong University,Nantong 226019,China;Nantong University Xinglin College,Nantong 226236,China)
出处
《南通大学学报（自然科学版）》
CAS
2022年第4期35-43,共9页
Journal of Nantong University(Natural Science Edition)
基金
南通大学大学生创新项目(2022129)
南通大学杏林学院大学生训练计划项目(201807)。
关键词
木质素
棉秸秆
束纤维
阳离子改性剂
定向剥离
lignin
cotton stalk
fiber bundles
cationic modifier
directed exfoliating
