冷冻交联制备ZM-CSt-PVA复合凝胶及吸附Cu2+性能  

Preparation of ZM-CSt-PVA Composite Gel though Freezing Cross-linking Method and Its Adsorption Performance of Cu2+

作　　者：王梓民 石海信 王爱荣 王锋 何强 WANG Zi-min;SHI Hai-xin;WANG Ai-rong;WANG Feng;HE Qiang(College of Petroleum and Chemical Engineering,Beibu Gulf University,Qinzhou 535011,Guangxi,China;School ofChemistry and Chemical Engineering,Guangxi University,Nanning530004,Guangxi,China)

机构地区：[1]北部湾大学石油与化工学院,广西钦州535011 [2]广西大学化学化工学院,广西南宁530004

出　　处：《精细化工》2019年第6期1198-1202,1209,共6页Fine Chemicals

基　　金：广西高校高水平创新团队及卓越学者计划(桂教人[2016]42号);广西教育厅高校中青年教师基础能力提升项目(2018KY0618);广西高校北部湾石油天然气资源有效利用重点实验室基金(2017KLOG13)~~

摘　　要：以两性离子单体二甲氨基丙基丙烯酰胺-1-羧酸(ZM)、木薯淀粉(CSt)和聚乙烯醇(PVA)为主要原料,采用“一锅法”,通过冷冻交联制备ZM接枝共聚CSt-PVA互穿网络复合凝胶(ZPG2)。使用FTIR、TGA、POM、SEM-EDS对ZPG2进行了表征,评价了ZPG2对Cu2+的静态吸附效果。结果表明:300℃以下,ZPG2的热稳定性良好;ZM的存在可产生反聚电解质效应和化学配位效应,显著提高凝胶吸附能力;在吸附温度25℃、ZPG20.1 g、Cu2+质量浓度2×103 mg/L、溶液体积100 mL时,饱和吸附量为199 mg/g;吸附过程符合Langmuir等温吸附模型和准二级动力学模型。Zwitterionic monomer(ZM), cassava starch(CSt) and polyvinyl alcohol(PVA) were used as main raw materials to prepare a ZM graft copolymerized CSt-PVA interpenetrating network composite gel(ZPG2) through freezing cross-linking method with a one-pot process. ZPG2 was characterized by FTIR,TGA, POM, SEM-EDS. The static adsorption effect of ZPG2 on Cu2+ was evaluated. The results showed that ZPG2 had good thermal stability below 300 ℃. The presence of ZM produced an anti-polyelectrolyte effect and a chemical coordination effect, which increased the gel adsorption capacity significantly.Saturated adsorption amount was as much as 199 mg/g when adsorption temperature was 25 ℃, ZPG2 dosage was 0.1 g, Cu2+ mass concentration was 2×103 mg/L, and solution volume was 100 mL. The data of adsorption isotherm was well described by the Langmuir isotherm adsorption model while the adsorption kinetics of ZPG2 fitted well with the pseudo-second-order kinetic model.

关 键 词：互穿网络凝胶 反聚电解质效应 冷冻交联法 两性离子 聚乙烯醇 吸附 淀粉 水处理技术 

分 类 号：TQ085[化学工程] O648.17[理学—物理化学]