微波法合成凹凸棒复合丙烯酸高吸水性树脂的研究

以N,N′-亚甲基双丙烯酰胺为交联剂,过硫酸钾和亚硫酸氢钠为引发剂,在微波辐照下合成了凹凸棒复合丙烯酸高吸水性树脂。研究了凹凸棒用量、微波反应功率和反应时间等因素对高吸水树脂吸液性能的影响,并用IR谱对最佳产物的结构进行了表征。实验结果表明,最佳的反应条件为:丙烯酸和凹凸棒的质量比为10∶1,引发剂用量为单体质量的0.6%,交联剂N,N′-亚甲基双丙烯酰胺的用量为单体质量的0.04%,反应器功率为600 W,反应时间45 s,并且在该条件下高吸水树脂的吸水倍率为1 250,吸盐水倍率为210。

Synthesis of Graft Copolymerization of Acrylic Acid onto Attapulgite Clay by Method of Microwave Polymerization

A super-absorbent resin of attapulgite clay acrylate graft copolymer was synthesized by the method of microwave polymerization using N,N′-methylenebis-acrylamide as a crosslinking agent and potassium persulfate and sodium bisulfite as an initiator.The effect of attapulgite clay amount,microwave reactor power and response time on the fluid absorption of resin was investigated.FTIR was used to characterize the best product.The optimal reaction conditions came out as follows:weight ratio of acrylic acid to attapulgite clay was 10:1;the amount of initiator accounted for 0.6% of the monomer′s;the amount of crosslinking agent N,N′-methylenebis-acrylamide accounted for 0.04% of the monomer′s; the microwave reactor power was 600 W and response time was 45 s,and this resin could absorb 1 250 times of distilled water and 210 times of salt water.