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以甲基丙烯酸(MAA)、丙烯酰胺(AM)为单体,N,N-亚甲基双丙烯酰胺作交联剂(BIS),过硫酸铵为引发剂(APS),用溶液聚合的方法合成水凝胶P(MAA-co-AM),研究了单体配比及干燥方式对水凝胶表面形貌以及对水、不同pH溶液及盐溶液的溶胀行为的影响。结果表明,P(MAA-co-AM)16凝胶(MAA/AM摩尔比为16∶100)冻干处理后具有均匀的大孔;与PAM和PMAA凝胶相比,P(MAA-co-AM)16凝胶的吸水溶胀速率快(1h溶胀平衡)、平衡溶胀比大(ESR=250)、pH体积响应变化大(pH为4.01、6.86、9.18时的ESR分别为20、60、141),吸盐率比PMAA有所提高。
Using MAA, AM as monomer, N, N-methylenebisacrylamide as cross-linking agent (BIS) and ammonium persulfate as initiator (APS) The effects of monomer ratio and drying method on the surface morphology of hydrogel and the swelling behavior of water, different pH solutions and salt solutions were studied. The results showed that P (MAA-co-AM) 16 gel had a uniform macropore after freeze-drying with MAA / AM 16: 100. Compared with PAM and PMAA gel, (ESR = 250), the volume response of pH changes sharply (ESR at pH 4.01,6.86 and 9.18 respectively) , Salt absorption rate than PMAA increased.