腐植酸钠/聚N-异丙基丙烯酰胺水凝胶的合成及脱色性能研究

 以过硫酸铵为引发剂、N,N'-亚甲基双丙烯酰胺为交联剂、N-异丙基丙烯酰胺单体和腐植酸钠为原料，用溶液聚合交联法合成了温敏腐植酸钠/聚N-异丙基丙烯酰胺（SH/PNIPA）系列水凝胶。用红外光谱分析仪对其内部相互作用进行了研究，并用紫外可见分光光度计对水凝胶吸附-解吸亚甲基蓝的性能进行了测试。实验结果表明凝胶中SH与PNIPA形成了氢键;凝胶对亚甲基蓝（MB）的吸附和解吸能力受腐植酸钠的含量、亚甲基蓝的起始浓度和温度的影响; 每克干的SH0.03凝胶最大可吸附亚甲基蓝10.8 mg。

Synthesis and Decoloring Properties of Sodium Humate/Polyisopropylacrylamide Hydrogels

A series of sodium humate/polyisopropylacrylamide (SH/PNIPA) hydrogels was synthesized by solution polymerization using acrylamide and sodium humate(SH) as raw materials, ammonium persulfate (APS) as the initiator and N,N′- methyleneb is acrylamide(MBA) as the crosslinker. Their swelling property and decoloring property were examined. Experiment results show that there exist hydrogen bonding between SH and PNIPA; the absorption and desorption of methylene blue(MB) for hydrogels were influenced by temperature, initial MB concentration and SH content. The maximum absorption capacit was 10.8 mg MB per gram of SH/PNIPA gel.