Graphene oxide/polyacrylonitrile fiber hierarchical-structured membrane for ultra-fast microfiltration of oil-water emulsion

被引：288
作者：
Zhang, Jianqiang [1 ,2 ]
Xue, Qingzhong [1 ,2 ]
Pan, Xinglong [2 ]
Jin, Yakang [2 ]
Lu, Wenbo [2 ]
Ding, Degong [2 ]
Guo, Qikai [2 ]
机构：
[1] China Univ Petr, State Key Lab Heavy Oil Proc, Qingdao 266580, Shandong, Peoples R China
[2] China Univ Petr, Coll Sci, Qingdao 266580, Shandong, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2017年 / 307卷
关键词：
Hierarchical structure; Superhydrophilic surface; Oil-water emulsion separation; Graphene oxide; Polyacrylonitrile; NANOFIBROUS MEMBRANES; EFFECTIVE SEPARATION; GRAPHITE OXIDE; FABRICATION; SURFACE;
D O I：
10.1016/j.cej.2016.08.124
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Novel hierarchically structured membrane consisting of graphene oxide coating aminated polyacrylonitrile (GO/APAN) fibers were successfully fabricated by controlled assembly of GO sheets on the surface of electrospun APAN fibers and the gap between fibers. This membrane which was superhydrophilic and low-oil-adhesion exhibited ultra-high flux (similar to 10,000 LMH), preferable rejection ratio (>= 98%) and remarkable antifouling performance for the separation of oil-water emulsion. The ultra-high flux was attributed to the large porosity of GO/APAN membrane, whereas the preferable rejection ratio and remarkable antifouling performance were attributed to the smaller GO sheets modified on the APAN fibers and larger GO sheets connected to two or more APAN fibers. More importantly, GO/APAN membrane also exhibited supernormal stability in treating oil-water emulsion with a broad pH range or high-concentration salt, which indicated that the membrane was promising for practical using in oily wastewater. The novel hierarchical structures of GO/APAN membrane greatly enhanced its oil-water separation performance and opened an avenue for designing new nanostructured membrane materials. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：643 / 649
页数：7
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