CMS-g-PAA高吸水性复合材料的制备及性能研究  

Synthesis and Properties of Cotton Mask Substrate Grafted PAA Superabsorbent Composites

作　　者：许晓辉[1] 白波[2] 丁晨旭[2] 王洪伦[2] 索有瑞[2] 

机构地区：[1]长安大学环境科学与工程学院,西安710054 [2]中国科学院西北高原生物研究所,西宁810001

出　　处：《材料导报》2015年第14期58-62,76,共6页Materials Reports

基　　金：中国博士后特别资助项目(201104615);中央高校基本科研业务费专项资金(2013G2291015)

摘　　要：以废弃全棉面膜基布(CMS)和丙烯酸(AA)为原料,采用自由基溶液聚合法制备CMS-g-PAA复合高吸水性材料,并用红外光谱(FTIR)进行表征。研究了吸水性、保水性及反复吸放液性能,采用准一级、二级动力学模型对其吸水溶胀过程进行模拟研究。结果表明,全棉面膜基布和丙烯酸单体之间发生了接枝共聚反应,所合成的CMS-g-PAA复合材料在去离子水和0.9%(质量分数)NaCl溶液的吸水倍率分别可达211.3g/g和45.5g/g,且溶胀过程符合准二级动力学吸附模型。在较高温度和一定压力下,CMS-g-PAA均具有良好的保水性能。反复吸放液性能测试表明循环8次后,去离子水和0.9%(质量分数)NaCl溶液的吸水倍率分别保持了最大吸水倍率的64.9%和44.4%。CMS-g-PAA superabsorbent composite was synthesized through free-radical aqueous copolymeriza tion, using waste cotton facial mask substrate （CMS） and acrylic acid （AA） as raw materials. Meanwhile, the micro- structure of CMS-g-PAA was characterized by means of FTIR. The capacity of liquid absorption and water-retention properties and reusability of the superabsorbent composite were also studied, and the model of pseudo-first-order and pseudo-second-order swelling kinetic were used to simulate the kinetic swelling property of the polymers, respectively. The results indicate that the grafting copolymerization reaction occurred between CMS and acrylic acid monomer. The obtained CMS-g-PAA had the best absorbency of 211.3 g/g in distilled water and 45.5 g/g in 0. 9 wt~ NaC1 solution, respectively. The pseudo-second-order kinetic equation is suitable for simulation of the adsorption processes. Moreo- ver, the CMS-g-PAA showed excellent water retention capability under the condition of high temperature or high pres- sure. In addition, the absorbencies ability in distilled water and 0. 9 wt% NaC1 aqueous solution via eight cycles re- mained about 64. 9% and 44. 4~ of the original maximum value.

关 键 词：全棉面膜基布 聚丙烯酸 高吸水性复合材料 保水性 

分 类 号：S37[农业科学—农产品加工]