St–AM–AMPS三元共聚物的制备及吸附性能研究

Preparation and Adsorptive Capacity of St–AM–AMPS Ternary Copolymer

在不加氮气保护下,采用静置热聚合法,以过硫酸铵(APS)为引发剂,N,N'-亚甲基双丙烯酰胺(NMBA)为交联剂,制备了淀粉(St)–丙烯酰胺(AM)–2-丙烯酰胺基-2-甲基丙磺酸(AMPS)三元共聚物,探索了反应条件对共聚物吸附亚甲基蓝和蒸馏水能力的影响。结果表明,当反应体系中AM与AMPS物质的量之比为1.51∶1,St在St,AM和AMPS混合体系中的质量分数为23%,St,AM和AMPS在反应体系中的总质量分数为23%,p H=3,交联剂NMBA和引发剂APS在反应体系中的质量分数均为0.03%时,所制备的共聚物对亚甲基蓝的吸附能力最高,且此时的吸水倍率完全满足工业应用要求。

Using ammonium persulfate （APS） as initiator, N, N＇ -methylene-bis-acrylmide （NMBA） as crosslinker, a ternary copolymer of starch（St）-acrylamide（AM）-2-acrylamido-2-methylpropanesulfonic acid（AMPS） was prepared in water solution by static thermal polymerization without nitrogen atmosphere. The effect of reaction conditions on adsorptive capacity of methylene blue and water of the copolymer was studied. The results show that when the molar ratio of AM and AMPS in the reaction system is 1.51 ： 1, the mass fraction of St in the St, AM and AMPS hybrid system is 23%, the total mass fraction of St, AM and AMPS in the reaction system is 23%, pH=3, the mass fraction of NMBA and APS in the reaction system is 0.03% respectively, the prepared copolymer has best adsorption performance for methylene blue and the water absorbent rate can meet the requirements of industry application.