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以丙烯酸(AA)和磺化腐植酸(SHA)为原料,N,N′-二亚甲基双丙烯酰胺(MBA)为交联剂,过硫酸铵(APS)为引发剂,采用水溶液法合成了一系列高SHA含量的AA-SHA共聚物[P(AA-SHA)]吸水树脂。分别采用正交试验和单因素实验考察了AA中和度、MBA用量、APS用量和AA单体浓度对P(AA-SHA)吸液性能的影响。研究了P(AA-SHA)在不同离子强度盐溶液和不同温度去离子水中的吸液性能。并用傅里叶变换红外光谱和热重分析对吸水树脂进行了表征。结果显示:在最佳实验条件下,当m(AA)/m(SHA)分别为4∶1,4∶2,4∶3,4∶4时,吸去离子水率分别为410,430,260,160 g/g。
Using AA and sulfonated humic acid (SHA) as raw materials, N, N’-dimethylene bisacrylamide (MBA) as crosslinking agent and ammonium persulfate (APS) as initiator, A series of high SHA content AA-SHA copolymer [P (AA-SHA)] water-absorbing resin. The effects of AA neutralization degree, MBA dosage, APS dosage and AA monomer concentration on liquid-absorbent properties of P (AA-SHA) were investigated by orthogonal test and single factor experiment respectively. The liquid absorption properties of P (AA-SHA) in different ionic strength salt solutions and deionized water at different temperatures were studied. The water-absorbent resin was characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis. The results showed that under the optimal experimental conditions, the rates of water absorption and iontophoresis were 410, 430, 260 and 160 g / g, respectively, when m (AA) / m .