CMC-g-PAMPS/APT复合高吸水树脂的溶胀行为及热稳定性能  

Swelling Behaviors and Thermal Stability of CMC-g-PAMPS /APT Superabsorbent Composite

作　　者：徐继红[1] 甘颖[1] 丰芸[1] 李忠[1] 

机构地区：[1]安徽理工大学化学工程学院,安徽淮南232001

出　　处：《精细化工》2014年第8期946-949,954,共5页Fine Chemicals

基　　金：安徽省高校自然科学基金资助项目(KJ2009B054Z;KJ2009B120Z)~~

摘　　要：以2-丙烯酰胺基-2-甲基丙磺酸(AMPS)为单体,凹凸棒黏土(APT)和羧甲基纤维素钠(CMC)为复合组分,采用微波辐射方法制备了CMC-g-PAMPS/APT环境友好复合高吸水性树脂。考察了APT用量对树脂吸水速率、保水性能和反复吸水性能的影响,利用XRD和TG等方法分析了该树脂的结构及其热稳定性能。结果表明,APT和CMC参与了接枝共聚反应,其反应仅在APT的表面进行,单体并没有插入到APT的层间。在APT质量分数为7.5%时,树脂的分解温度主要在250℃以上,具有良好的热稳定性。经过5次反复溶胀后,树脂的吸水倍率较不含APT的树脂提高了近42%。在体系中引入APT能显著提高树脂的吸水速率和保水性能。Using 2-acrylamido-2-methyl propane sulfonic acid（AMPS） as organic monomer, attapulgite （APT） and carboxymethylcellulose（CMC） as composite components, novel eco-friendly carboxymethyl cellulose-g-poly （ 2-acrylamido-2-methyl propane sulfonic acid ）/attapulgite （ CMC-g-PAMPS/APT ） superabsorbent composites were synthesized by means of microwave irradiation. The effects of APT content on swelling rate, water retention and reswelling capability were systematically investigated. The chemical structure and thermal stability of the superabsorbent composites were characterized by means of XRD and TG. The results show that CMC and APT participated in the grafting copolymerization reaction. The reaction occurs only in the APT surface, and monomer is not inserted into the APT interlayer. When the mass fraction of APT is 7.5% , the superabsorbent composites has good thermal stability ,with the decomposition temperature above 250℃. After reswelling for 5 times, the water absorbency of the superabsorbent composites increased by 42% compared to that without APT. The swelling rate and water retention of the superabsorbent composites could be remarkably enhanced by introducing a certain amount of APT into the system.

关 键 词：复合高吸水性树脂 凹凸棒黏土 羧甲基纤维素钠 吸水速率 保水性能 功能材料 

分 类 号：TQ322.91[化学工程—合成树脂塑料工业]