P(AA-AM)/Nano-SiO_(2)/PVA半互穿网络复合吸水树脂合成及性能研究

Synthesis and performance of P(AA-AM)/Nano-SiO_(2)/PVA semi-interpenetrated network composite absorbent resin

以丙烯酸(AA)、丙烯酰胺(AM)为单体,再引入纳米二氧化硅(Nano-SiO_(2)),以过硫酸铵为引发剂,N,N-亚甲基双丙烯酰胺(NMBA)为交联剂,采用加入聚乙烯醇来使体系具备互穿网络结构,采用水溶液聚合法制备了P(AA-AM)/Nano-SiO_(2)/PVA有机/无机复合互穿网络高吸水性树脂,考察了交联剂加量、引发剂加量、纳米二氧化硅加量对树脂吸水倍率的影响。结果表明,亲水纳米二氧化硅的加入对吸水树脂的吸水性能具有负面作用,粒径在20~80目时,复合树脂吸水倍率最高达到360 g/g,P(AA/AM)/PVA树脂吸水倍率为477 g/g;但在蒸馏水与0.9%(质量分数)氯化钠溶液中分别测试其吸水能力,发现纳米二氧化硅的加入使得复合树脂具有较好的保水性能,树脂80℃条件下干燥5 h,其保水率最高达到92.7%。

Taking acrylic acid(AA)and acrylamide(AM)as monomers,and then introducing nano-silica(nano-SiO_(2)),with ammonium persulfate as the initiator,N,N-methylenebisacrylamide(NMBA)as the crosslinking agent,using the addition of polyvinyl alcohol to make the system have an interpenetrating network structure,P(AA-AM)/Nano-SiO_(2)/PVA organic/inorganic composite interpenetrating network superabsorbent resin was prepared by aqueous solution polymerization method,and the crosslinker dosage and initiator were investigated.Effect of nano-silica addition on resin water absorption magnification.The results show that the addition of hydrophilic nano-silica has a negative effect on the water absorption performance of the water-absorbing resin,and the water absorption rate of the composite resin reaches 360 g/g at a particle size of 20~80 mesh.P(AA/AM)/PVA resin water absorption multiple of 477 g/g;test its water absorption capacity in distilled water and 0.9%sodium chloride solution,respectively;the addition of nano-silica makes the composite resin have good water retention performance,and the resin is dried for 5 h at 80℃,and its water retention rate reaches 92.7%.