用β-环糊精、聚乙烯醇和丙烯酰胺制备的高吸水性树脂的耐盐性及生物降解行为

Salt Tolerance and Biodegradation Behavior of β-Cyclodextrin / Poly( vinyl alcohol) / Acrylamide Superabsorbent Resin

采用反相悬浮法,以β-环糊精、聚乙烯醇和丙烯酰胺为主要原料,制备了高吸水性树脂。分别研究了树脂在不同浓度Cl-盐、SSO_4^(2-)盐,以及不同pH缓冲溶液中的吸液行为,并测定了树脂在青霉、黑曲霉及褐腐菌中的生物降解性能。实验结果表明:树脂在同浓度Cl^-盐溶液中的吸液效果比在SO_4^(2-)盐溶液中好;在0.05~1.00 mg/L的低质量浓度Fe^(3+)盐溶液中,树脂的吸液量仍可达700~1 050 g/g。树脂在pH=4~12的范围内均具有较好的吸液效果。霉菌对树脂具有不同程度的生物降解作用,树脂水凝胶在褐腐菌中的生物降解效果最佳,生物降解率高达81.3%,是环保型材料。

The β-cyclodextrin / poly（ vinyl alcohol） / acrylamide superabsorbent resin was synthesized by inverse suspension method using β-cyclodextrin,poly（ vinyl alcohol） and acrylamide. We studied the swelling characteristics of resin in the different concentrations of Cl^-,SO4^2-,and different pH buffer solution,and the biodegradability of resin in Penicillium,Aspergillus niger and Brown rot fungi. The swelling capability of resin in chlorine salt was better than that in sulfate. The swelling capability of resin was up to 700-1 050 g / g in 0.05-1.00 mg / L in Fe^3＋. There was good absorption of resin in pH of 4-12. The biodegradation efficiency of the resin hydrogel reached 81.3% in Brown rot fungi. The resin was an environmentally friendly material.