淀粉/AMPS/DMC高吸水树脂的合成及对重金属离子的吸附性能

Synthesis and Absorption Properties of Starch/AMPS/DMC Superabsorbent Resin

以可溶性淀粉、2-丙烯酰胺-2-甲基丙磺酸(AMPS)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为单体,过硫酸铵为引发剂,N,N’-亚甲基双丙烯酰胺(NMBA)作交联剂,采用水溶液聚合法,合成了一种新型淀粉/AMPS/DMC高吸水树脂。通过红外光谱、扫描电镜和热重分析确定了所合成高吸水树脂的结构组成,并研究了其对Cu^(2+)、Ni^(2+)两种重金属离子的吸附能力。结果显示,淀粉/AMPS/DMC高吸水树脂对于CuSO_4和NiSO_4的吸附极限浓度均为2g/L,均在2~3 min内吸附完全,其等温吸附行为符合Freundlich方程。

A new nontoxic and harmless superabsorbent resin was prepared through free-radical polymerization in aqueous solution using starch,2-acrylamido-2-methylpropanesulfonic acid（AMPS） and methacryloyloxyethyl trimethyl ammonium chloride as raw materials. The resin was characterized by FTIR,SEM and TG analysis. The absorption capacities of as-prepared starch/AMPS/DMC resin for Cu^（2＋）and Ni^（2＋）was examined. Cu^（2＋）and Ni^（2＋）can be completely absorbed by superabsorbent resin within 2 ~ 3 min when the concentration of Cu SO4 and Ni SO4are2 g/L. The isothermal adsorption equation shows that Freundlich equation can better describes the adsorption behavior.