摘要
以富含羟基的纤维素纳米晶(CNC)为吸湿发热填料,聚丙烯腈(PAN)为基体材料,采用湿法纺丝制备了一系列不同CNC含量的PAN/CNC复合吸湿发热纤维,并对其进行热拉伸处理。通过对不同CNC含量及不同热拉伸倍数的复合纤维进行性能测试发现,复合纤维的吸湿发热性能随着CNC含量的增加而显著提升。热拉伸处理能够有效增加纤维的比表面积,减小PAN微纤的平均横向尺寸,并提高CNC的取向度,使复合纤维的吸湿发热性能和力学性能均得到明显改善。当CNC质量分数为30%,拉伸倍数为12时,复合纤维的拉伸强度达到(414.1±2.9)MPa,在90%相对湿度下的最大吸湿发热温差可达2.9℃。
Cellulose nanocrystals(CNC),rich in hydroxyl groups,were employed as hygroscopic thermal fillers,while polyacrylonitrile(PAN)was used as the matrix material,a series of PAN/CNC composite hygroscopic thermal fibers with varying CNC contents were fabricated via wet spinning,followed by hot-drawing treatment.Performance tests on the composites with different CNC contents and draw ratios revealed that increasing CNC content significantly enhanced the hygroscopic thermal capability of the fibers.Hot-drawing effectively increased the specific surface area,reduced the average transverse dimension of PAN microfibrils,and improved the orientation of CNC,thereby markedly enhancing both the hygroscopic thermal and mechanical properties of the composite fibers.When the CNC content was 30%and the draw ratio was 12,the composite fibers exhibited a tensile strength of(414.1±2.9)MPa,and the maximum hygroscopic thermal temperature difference reached 2.9℃at 90%relative humidity.
作者
曲美洁
陈秋杉
宾月珍
QU Meijie;CHEN Qiushan;BIN Yuezhen(School of Chemical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)
出处
《纺织高校基础科学学报》
2026年第1期110-119,共10页
Basic Sciences Journal of Textile Universities
基金
国家自然科学基金(22073015)
科技部重点研发计划(2022YFB3704600)。
关键词
纤维素纳米晶
聚丙烯腈
吸湿发热纤维
力学性能
cellulose nanocrystals
polyacrylonitrile(PAN)
hygroscopic thermal fibers
mechanical properties
