改性纤维素基发泡材料的制备及其性能研究.pdf

第14期 蔡举艳,等:改性纤维素基发泡材料的制备及其性能研究 • 43 • 改性纤维素基发泡材料的制备及其性能研究 蔡举艳 ，田娜，贾卫敏，王天聪，刘冲涛，鲍园园，石小琴 ，苏琼* (西北民族大学化工学院，甘肃兰州730030) 摘要:先后对小麦秸秆进行NaOH预处理、乙酸酊改性,得到酰化改性小麦秸秆(AWS) o以酰化改性秸秆为原料，以水为发泡剂，以竣甲 基纤维素(CMC)为交联剂，采用冷冻干燥法制备了具有一定强度的纤维素基发泡材料,研究了 m(2%CMC) : m (AWS)对发泡材料表 观密度、微观形貌和力学强度的影响 。结果表明,2%竣甲基纤维素的用量增大有利于表观密度的降低 ,m(2%CMC) : zn(AWS)为6 时，发泡材料的力学性能较好，其载荷为3 770 N,弹性模量为24. 5 MPa。 关键词:改性纤维素;竣甲基纤维素;发泡材料;冷冻干燥 中图分类号:TQ352.6 文献标识码:A 文章编号：1008-021X(2022) 14-0043-03 Preparation and Properties of Modified Cellulose-Based Foaming Materials Cai Jwyan, Tian Na, Jia Weurdn, Wang Tiancong 9 Liu Chongtao, Bao Yuanyuan, Shi Xiaoqin, Su Qiong* (School of Chemical Engineering,Northwest Minzu University,Lanzhou 730030,China) Abstrac :In this paper,acylated wheat straw (AWS) was obtained by NaOH pretreatment and acetic anhydride modification.A cellulose based foaming material wit certain strengt was prepared by freeze drying method using acylated straw as raw material, water as foaming agent and carboxymethyl cellulose as crosslinking agent, the effects of m ( 2% CMC) ： m ( AWS) on the apparent density, microstructure and mechanical strengt of foamed materials were investigated.The results show that the increase of the dosage of 2% carboxymethyl cellulose is beneficial to the decrease of the apparent density. When m (2% CMC) : m (AWS) is 6,the mechanical properties of the foamed material are good,the load is 3 770 N,the elastic modulus is 24. 5 MPa. Key words: modified cellulose; carboxymethyl cellulose; foaming materials; freeze-drying 传统的发泡材料是由不可再生的石油衍生品制成的，其降 万能电子试验机,岛津仪器(苏州)有限公司。 解能力差，制备成本高，且不利于环境的保护和资源的节约⑴。 2实验部分 基于此背景下,利用生物质资源制备生物质基发泡材料已成为 2.1小麦秸秆的预处理 一个研究热点 。生物质基发泡材料具有良好的生物降解性和