羧甲基纤维素吸水性纱布的制备及其吸湿性动力学分析

纺织学报 ›› 2013, Vol. 34 ›› Issue (6): 21-25.

羧甲基纤维素吸水性纱布的制备及其吸湿性动力学分析

密叶,李群,赵昔慧,洪永明

青岛大学

收稿日期:2012-06-08 修回日期:2012-08-20 出版日期:2013-06-15 发布日期:2013-06-19
通讯作者: 李群 E-mail:qunli501@163.com

Preparation of absorbent CMC gauze and analysis of its absorbent kinetics

Received:2012-06-08 Revised:2012-08-20 Online:2013-06-15 Published:2013-06-19

摘要/Abstract

摘要： 对纤维进行羧甲基化处理，可将强亲水性的羧甲基引入纤维素分子结构中，使其吸收液体的能力显著提高。本文以普通棉纱布为原料，通过控制氯乙酸(MCA)的用量，制备了不同取代度(DS)的羧甲基纤维素(CMC)吸水性纱布，研究了DS值不同的CMC吸水性纱布的吸湿动力学。结果表明，CMC吸水性纱布具有较强的吸湿能力，当MCA用量与纤维素糖单元的摩尔比nMCA：nAGU=2:1时，DS值可达到43.10%，DS值越高，吸湿性越好。DS值为43.10%的样品在RH=81%时吸湿率可达18%左右，平衡吸湿量为182.39 mg/g。采用二级吸附动力学方程能够很好地描述其吸湿行为，相关系数达0.999以上，并且计算得到的平衡吸湿量与实验值接近。

关键词: 羧甲基纤维素, 吸湿性, 吸湿动力学, 取代度

Abstract: The ability of absorbing liquid can be improved greatly as introducing carboxymethyl group into fiber structure. Carboxymethyl cellulose (CMC) hydrophilic gauze of different substitution degrees (DS) were prepared by controlling the amount of chloroactic acid (MCA). The moisture absorption capacity and kinetic of sample with different DS were analyzed. The results indicated that the optimized product had a large degree of substitution (DS) of 43.10% as nMCA: nAGU=2:1.The moisture absorption capacity of samples increased while DS values increased. Moisture absorption rate and the equilibrium adsorption amount of samples with DS 43.10% at RH=81% were 18% and 182.39 mg/g , respectively. Kinetic analysis of absorption showed that the second-order model of adsorption kinetic equation could characterize the absorption process well, as the relation coefficient was higher than 0.999. The calculated values of equilibrium moisture content agree well with the experimental values.

Key words: carboxymethyl cellulose, absorbency, absorbent kinetics, substitution degree

中图分类号:

密叶李群赵昔慧洪永明. 羧甲基纤维素吸水性纱布的制备及其吸湿性动力学分析[J]. 纺织学报, 2013, 34(6): 21-25.

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