明胶-环氧聚醚胺交联膜的合成及其对重金属离子的吸附性能  

Preparation of Gelatin-Epoxy Poly(ether amine)Crosslinked Membrane and Its Adsorption Behavior for Heavy Metal Ions

作　　者：张赛[1] 史子兴[1] 印杰[1] 

机构地区：[1]上海交通大学化学化工学院,上海200240

出　　处：《功能高分子学报》2016年第1期29-35,共7页Journal of Functional Polymers

摘　　要：首先利用聚乙二醇二缩水甘油醚(PEO-DE)、聚二甲基硅氧烷二缩水甘油醚(PDMSDE)与无水哌嗪以1∶1∶1的物质的量之比反应合成环氧封端的聚醚胺(ePEA),然后将ePEA分散在水相中与明胶混合,浇铸固化成膜。利用红外光谱(FT-IR)、X射线衍射(XRD)、示差扫描量热法(DSC)和原子吸收光谱(AAS)等手段研究了明胶-环氧聚醚胺交联膜的结构和离子吸附性能。结果表明,与纯明胶膜相比,交联膜中的环氧聚醚胺与明胶之间出现了新的化学交联结构,在水溶液中的稳定性提高;交联膜对Cu2+、Pb2+、Cd2+均有一定的吸附作用,并且吸附能力随着ePEA含量的增加而增加;吸附过程符合二级动力学模型和Langmuir等温模型。Polyethyleneglycol diglycidyl ether（PEO-DE）and polydimethylsiloxane diglycidyl ether（PDMSDE）were used as difunctional monomers to react with anhydrous piperazine（molar ratio was 1∶1∶1）to synthesize a novel kind of epoxy poly（ether amine）（ePEA）ended with epoxy groups.Then ePEA was mixed with gelatin in aqueous solution,casting in teflon mold to get dried crosslinked membrane.FT-IR,XRD patterns,DSC and Atomic Absorption Sepectroscopy（AAS）were exploited to study the structure and heavy metal ions adsorption capacities of the gelatin-ePEA crosslinked membrane.Results showed that gelatin was chemically crosslinked by ePEA,which could improve the stability of the gelatin membrane swelling in water.And the gelatin-ePEA crosslinked membrane exhibited agood adsorption ability to Cu2＋,Pb2＋and Cd2＋in water,which was increased with the increasing of ePEA content.Adsorption process could be matched with pseudo second order model and Langmuir model.

关 键 词：聚醚胺 明胶 交联膜 重金属离子吸附 

分 类 号：O636.9[理学—高分子化学]