基于废旧棉织物的CNCs制备及增强应用研究  

Preparation and reinforcing application of CNCs based on waste cotton fabric

作　　者：张涛[1] 郭红[1,2,3] 赵晓婉 甘胜华 侯文生 ZHANG Tao;GUO Hong;ZHAO Xiaowan;GAN Shenghua;HOU Wensheng(Taiyuan University of Technology,Jinzhong 030600,China;Key Laboratory of Clean and Recycling of Waste Polyester and Cotton Textiles in the Textile Industry,Jinzhong 030600,China;Tongkun Group Co.,Ltd.,Jiaxing 314500,China)

机构地区：[1]太原理工大学,山西晋中030600 [2]纺织行业废旧涤棉纺织品清洁再生重点实验室,山西晋中030600 [3]桐昆集团股份有限公司,浙江嘉兴314500

出　　处：《棉纺织技术》2024年第8期87-92,共6页Cotton Textile Technology

基　　金：山西省科学技术厅青年科学研究项目(20210302124492)。

摘　　要：为实现废旧棉织物的高值化回收利用,采用酸解法将其水解制备成纤维素纳米晶体(CNCs),通过多种表征方法分析了制备的CNCs的形貌尺寸及理化特性,并探究CNCs对PVA膜力学性能的增强效果。结果表明:制备的CNCs呈短棒状结构,长度168 nm±71 nm,直径19 nm±11 nm,收率54.2%;CNCs的Zeta电位值-31.8 mV,分散稳定性良好,且热稳定性较棉织物有一定程度下降;CNCs仍为纤维素Ⅰ型结构,结晶度80.8%。CNCs质量分数为5%时,PVA复合膜拉伸断裂强度和断裂伸长率较原PVA膜分别提高了37.8%和32.7%。认为:硫酸水解废旧棉织物制备CNCs性能良好,显著增强了PVA复合膜的力学性能,拓宽了废旧棉织物循环利用途径。To realize high value recovery of waste cotton fabric,cellulose nanocrystals(CNCs)were prepared from waste cotton fabric by sulfuric acid hydrolysis,and the prepared CNCs were analyzed from morphology,size and physicochemical property by various characterization methods.The enhancement effect of CNCs on mechanical property of PVA films were explored.The results showed that the prepared CNCs presented a short rod-like structure,with length 168 nm±71 nm and diameter 19 nm±11 nm,and the yield was 54.2%.The Zeta potential value of CNCs was-31.8 mV and its dispersion stability was better,the thermal stability of CNCs showed a decrease compared to cotton fabric.The CNCs remained cellulose type I structure with crystallinity of 80.8%.When the mass fraction of CNCs was 5%,compared with PVA film,the tensile strength and breaking elongation rate of PVA composite film were increased 37.8%and 32.7%respectively.It is considered that properties of the prepared CNCs from waste cotton fabric by sulfuric acid hydrolysis are excellent,the mechanical properties of PVA composite film are significantly reinforced,which widen the way of recycling utilization of waste cotton fabric.

关 键 词：废旧棉织物 纤维素纳米晶 酸法水解 PVA复合膜 力学性能 

分 类 号：TS119[轻工技术与工程—纺织材料与纺织品设计]