废棉再生气凝胶/经编间隔织物复合材料的制备及其性能  

Preparation and properties of waste cotton regenerative aerogel/warp-knitted spacer fabric composites

作　　者：李珍珍 支超 余灵婕[1,2] 朱海 杜明娟 LI Zhenzhen;ZHI Chao;YU Lingjie;ZHU Hai;DU Mingjuan(School of Textile Science and Engineering, Xi′an Polytechnic University, Xi′an, Shaanxi 710048, China;Key Laboratory of Functional Textile Material and Product, Ministry of Education, Xi′an Polytechnic University, Xi′an, Shaanxi 710048, China;College of Textiles, Donghua University, Shanghai 201620, China)

机构地区：[1]西安工程大学纺织科学与工程学院,陕西西安710048 [2]西安工程大学功能性纺织材料及制品教育部重点实验室,陕西西安710048 [3]东华大学纺织学院,上海201620

出　　处：《纺织学报》2022年第1期167-171,177,共6页Journal of Textile Research

基　　金：国家自然科学基金项目(51903199);陕西高校青年杰出人才支持计划项目(2020);陕西省自然科学基础研究计划资助项目(2019JQ-182,2018JQ5214);陕西省教育厅科研计划项目(18JS039);中国纺织工业联合会科技指导性项目(2020046,2020044)。

摘　　要：针对废旧纺织品制备纤维素气凝胶存在强度低、脆性高、韧性差的问题,将废旧棉花溶解在氢氧化钠/尿素水溶液体系中得到棉纤维素气凝胶(CFA),然后将经编间隔织物(WKSF)与其进行原位复合,经冷冻干燥得到CFA/WKSF复合材料,并对其形貌、压缩和隔热性能进行分析与研究。结果表明:CFA/WKSF复合材料保持了气凝胶的多孔网状结构;WKSF的加入使CFA的力学性能得到提高,其中编链和衬纬结构WKSF的加入使得CFA的压缩弹性模量和屈服强度分别提高了180%和450%,六角形网孔结构WKSF的加入使得CFA的压缩弹性模量和屈服强度分别提高了70%和312%;加入六角形网孔结构WKSF后,CFA/WKSF复合材料的导热系数相比CFA仅增加5%,仍具有良好的隔热性。Aimed at the problem that cellulose aerogel has low strength,high brittleness,and poor toughness,cotton was used as the raw material and dissolved it in the sodium hydroxide/urea aqueous solution system to obtain cotton cellulose aerogel(CFA),which was then combined with the warp-knitted spacer fabric(WKSF)in-situ composite to develop a new type of CFA/WKSF composite.A series of researches were finally conducted to analyze the morphology and performance such as compression and insulation of the new type of material.The results show that CFA/WKSF composite maintains the porous mesh structure of aerogel,and the use of WKSF of chain and inlay structure increases the compression elastic module and yield strength of CFA by 180%and 450%,respectively,and WKSF of hexagonal mesh structure increases the compression elastic module and yield strength of CFA by 70%and 312%,respectively.With the use of hexagonal mesh structure of WKSF,the thermal conductivity of CFA/WKSF composite aerogel is grown only by 5%,indicating excellent insulation of the composite material.

关 键 词：废旧纺织品 棉纤维素气凝胶 经编间隔织物 复合材料 压缩性能 隔热性能 

分 类 号：TS190[轻工技术与工程—纺织化学与染整工程]