聚乙烯亚胺交联三维石墨烯制备与吸附性能  

Preparation and Adsorption Property of Polyethyleneimine Crosslinked 3D Graphene

作　　者：刘红宇[1] 杜西刚[1] 潘炳力[1] 牛青山[1] 张玉清[1] 

机构地区：[1]河南科技大学高分子科学与纳米技术重点实验室,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2017年第5期96-100,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(21101058);河南科技大学博士科研基金项目(13480051)

摘　　要：以聚乙烯亚胺(PEI)为交联剂,制备了PEI交联石墨烯絮状分散液。采用冷冻干燥法除掉絮状分散液中的溶剂水后,得到三维石墨烯。通过X射线衍射、扫描电子显微镜和红外光谱表征了所得三维石墨烯的结构及形貌特征,并测试了三维石墨烯对亚甲基蓝的吸附性能。研究结果表明:聚乙烯亚胺分子链的胺基可以与氧化石墨烯片层的环氧基和羧基反应,使PEI接枝到多个氧化石墨烯片层上,形成PEI交联的三维石墨烯。三维石墨烯能够快速吸附亚甲基蓝,当三维石墨烯添加量为10 mg、吸附时间为20 min时,亚甲基蓝去除率为85%,接近平衡去除率。Gaphene flocculent dispersions were prepared by taking polyethyleneimine( PEI) as crosslink agent.After removing the solvent water from floculent dispersions by using the freeze-drying method,3D porous graphene were obtained. By means of XRD,SEM and FT-IR characterizations,the structure and morphology features of the 3D graphene were characterized. The adsorption performance of 3D graphene for methylene blue was tested. The results show that the amine groups of PEI can react with the epoxy and carboxyl groups of graphene oxide( GO). Therefore one PEI chain is grafted with several GO sheets to form PEI crosslinked 3D graphene composites. The 3D graphene exhibits the rapid adsorption capacity for methylene blue. When the additive amount of 3D graphene is 10 mg and the adsorption time is 20 min,the removal efficiency of 3D graphene for methylene blue is 85%,closing to the equilibrium removal efficiency.

关 键 词：三维石墨烯 聚乙烯亚胺 吸附 亚甲基蓝 

分 类 号：X703.5[环境科学与工程—环境工程]