工艺因素对XG-AM接枝共聚型吸水树脂性能的影响

INFLUENCE OF PROCESS FACTORS ON WATER ABSORPTION CAPACITY OF SUPERABSORBENT COPOLYMER OF XG-AM

以APS为引发剂,MBAA为交联剂,采用水溶液聚合法,制备了XG-AM接枝共聚耐盐型高吸水性树脂.分别研究了丙烯酰胺用量、碱用量、聚合温度、交联剂和引发剂用量等因素对树脂吸水性能的影响.采用红外光谱仪、X射线粉末衍射仪对树脂进行了表征和测试.结果表明:黄原胶与丙烯酰胺发生了接枝聚合反应,当m(AM)/m(XG)为6∶1,m(NaOH)/m(AM)为1∶1,聚合温度为60℃,m(MBAA)/m(AM)为0.04∶1,m(APS)/m(AM)为0.07∶1时,树脂对去离子水的吸收倍率可达1 240 g.g-1,对0.9%NaCl溶液的吸收倍率达到235 g.g-1.

The superabsorbent polymer with good salt tolerance was synthesized with acrylamide grafted on xanthan gum through solution polymerization using APS as initiator and MBAA as cross-linking agent. The effects of factors such as amount of acrylamide, temperature, amount of alkali, initiator and cross-linking agent on the absorption capacity of the copolymer were discussed. The copolymer were characterized and analyzed by FT-IR and XRD, and the thermal properties were analyzed by TGA. The result shows that acrylamide monomers were successfully graft polymerized onto xanthan gum, the absorbent ability of the copolymer was 1 240 g·g^-1 for pure water and 235 g·g^-1 for NaCl solution under the condition that reaction temperature was 60 ℃, m （AM） ： m （xanthan gum） = 6 ： 1 and, m （APS） ： m（AM） =0.07：1, m （MBAA） ： m（AM） =0.04：1, m （NaOH） ： m（AM） = 1：1.