黄原胶/膨润土/P(AA-co-AMPS)复合高吸水树脂的合成与性能

实验以黄原胶(XG)为改性基体材料,丙烯酸(AA)和2-丙烯酰胺基-2-甲基丙磺酸(AMPS)为接枝单体,并添加膨润土黏土,采用水溶液聚合法合成了黄原胶/膨润土/P(AA-co-AMPS)/复合高吸水性树脂,采用单因素实验考察了影响树脂性能的各种因素。较佳工艺条件为:w(膨润土)=15%,m(AMPS)=1.7g,w(引发剂)=0.8%,w(交联剂)=0.045%,聚合温度70℃,树脂最大吸水倍数数为873.4g/g,最大吸盐水倍数达108.9g/g。分析表明黄原胶、AA、AMPS和膨润土之间可能发生了交联共聚反应,膨润土的加入使复合树脂的热稳定性增加。

PREPARATION AND CHARACTERIZATION OF XANTHAN GUM-g-P(AA-co-AMPS)/BENTONITE COMPOSITE SUPERABSORBENT RESIN

With xanthan gum(XG) as the modifing material,2-acrylamido-2-methylpropanesulfonic acid(AMPS) and acrylic acid(AA) as monomers,adding bentonite,XG-g-P(AA-co-AMPS)/Bentonite composite superabsorbent resin was prepared through solution polymerization.The effects on composite superabsorbent were studied by single factor test.The results showed that the optimum conditions were: mass fractions of bentonite,APS and cross linker being 15%,0.8% and 0.004 5%,respectively,1.7 g AMPS,and reaction temperature 70 ℃.Under the above conditions,the water and 0.9% NaCl solution absorption was up to 873.4 g/g and 108.9 g/g,respectively.IR and XRD indicated that the graft copolymerization between XG-g-P(AA-co-AMPS) and bentonite was generated.TGA indicated that with the addition of bentonite,the thermal stability of the composite superabsorbent was increased.