PVA/CTS/P(AA-AMPS)互穿网络结构高吸水树脂耐盐性和防潮性能研究

Salt-tolerating and moisture-resisting property of PVA/CTS/P(AA-AMPS)

以过硫酸钾(KPS)为引发剂,N,N′-亚甲基双丙烯酰胺(NMBA)为交联剂,丙烯酸(AA)和2-丙烯酰胺-2-甲基丙磺酸(AMPS)为单体,壳聚糖(CTS)为天然聚合物,聚乙烯醇(PVA)为合成聚合物,采用水溶液聚合法合成了互穿网络结构高吸水性树脂[PVA/CTS/P(AA-AMPS)],并对其进行了表征。考察了引发剂用量、交联剂用量、CTS用量和PVA用量对树脂吸液性能的影响。在最佳反应条件下,PVA/CTS/P(AA-AMPS对蒸馏水和0.9%(wt,质量分数)的氯化钠溶液的吸附量分别为1800g/g和110g/g。暴露在空气中8d条件下的吸湿性低于单层网络的87.5%,在不同阳离子盐溶液中(Na^+、Ca2^+和Fe3^+)的吸液性能也明显优于单层网络。

The Interpenetrating network superabsorbent resin[PVA/CTS/P(AA-AMPS]was synthesized by aqueous solution polymerization method,used acrylic acid(AA)and 2-acrylamido-2-methylpropane sulfonic acid as monomers,poly(vinyl alcohol)(PVA)as synthesized polymer,chitosan(CTS)as natural polymer,N,N′- methylenebisacrylamide as crosslinker and potassium persulfate as initiator.The structure and morphology of PVA/ CTS/P(AA-AMPS was characterized,respectively.Meanwhile,the effects of content of crosslinker,initiator,chitosan and PVA on the absorbency of the PVA/CTS/P(AA-AMPS)were investigated in details.The absorbency of the PVA/ CTS/P(AA-AMPS)was up to 1800g/g in distilled water and 110g/g in 0.9wt% NaCl solution.Under the condition of exposure to air for 8days,the moisture absorption of PVA/CTS/P(AA-AMPS)was lower than 87.5%of the single network SAR and PVA/CTS/P(AA-AMPS)had superior absorbency capacity in various saline solutions with different cations(Na^+,Ca2^+,Fe3^+).