HA/AA-UREA缓释保水剂的制备

Preparation of HA/AA-UREA slow released Superabsorbent Resin and Its Property

摘要:

以腐殖酸(HA)、部分中和的丙烯酸(AA)、尿素(UREA)为原料，过硫酸钾为引发剂，N,N-亚甲基双丙烯酰胺为交联剂，采用水溶液聚合法制备具有互穿网络结构的功能性缓释保水材料。并采用FTIR、SEM、DSC和压力势法等对产物的结构和性能进行表征和测试，探讨了单体配比、尿素用量、反应温度、引发剂用量及交联剂用量对产品吸水性能及缓释性能的影响。结果表明: 在聚合温度为80℃、引发剂的质量分数为1% (相对单体AA的质量，下同)、交联剂的质量分数为0.2%、HA的质量分数为20%、UREA的质量分数为50%时，制得高吸水性树脂吸自来水能力最高可达310g/g，且具有良好的保水性能，可利用水分占总吸水量的93.81%，氮元素30天累计释放71.50%。

Abstract:

humic acid/acrylic acid-urea controlled release superabsorbent resin with interpenetrating polymer networks was prepared by solution polymerization using acrylic acid(AA) urea and humic acid(HA) as raw materials, N`N-methylenebisacryla mide as crosslinkingagent and ammonium persulfate as initiator, respectively. The effect of the neutralization degree acrylic acid, reactant ratio, reaction temperature, the amount of initiator and cross-linking agent on the water absorbent ability were investigated. In addition, The structures and performance of products were studied by FTIR、SEM、DSC and Pressure potential method．The results show that the obtained superabsorbent resin has maximum waterabsorption ability up 310g/g, available water rate up to 93.81% and has good water retention performance when the polymerization temperature is 80℃, the amount of initiator,crossing agent, humic acid and urea in the acrylic acid were 0.3%, 0.06%, 20% and 50% respectively.