Binary nanofibrous membranes with independent oil/water transport channels for durable emulsion separation

被引:44
作者
Ding, Yajie [1 ]
Wang, Jianqiang [1 ,2 ]
Wu, Jindan [3 ]
Wang, Jiping [4 ]
Liu, Fu [1 ,2 ]
机构
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Key Lab Marine Mat & Protect Technol, Key Lab Marine Mat & Related Technol, Ningbo 315201, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Zhejiang Sci Tech Univ, Minist Educ, Key Lab Adv Text Mat & Mfg Technol, Hangzhou 310018, Zhejiang, Peoples R China
[4] Shanghai Univ Engn Sci, Shanghai 200336, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
Oil fouling; Binary nanofibrous membranes; Heterogenous wetting; Oil; water separation; Independent water; oil transport channels; IN-OIL EMULSIONS; WATER; DEMULSIFICATION; PERMEATION; EFFICIENCY;
D O I
10.1016/j.memsci.2023.121484
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Oil fouling threatens the stability of water permeability for oil-water separation membrane. Homogeneous hy-drophilic surface modification provided an opportunity to prevent oil pollution, but failed to maintain stable water traverse due to oil accumulation. Here we report a binary nanofibrous membrane (BNM) through co-electrospinning technique and Michael addition reaction, where hydrophilic polyacrylonitile (mPAN) and hy-drophobic poly (vinylidene fluoride) (mPVDF) nanofibers with certain ratio constructed independent water/oil transport channels respectively. The fabricated binary nanofibrous membrane provides stable permeance and high separation efficiency (>99.5%) for viscous oily emulsions in continuous cross-flow filtration. The oil droplets transport experienced deposition, migration, coalescence and removal to significantly alleviate fouling. The binary nanofibrous membrane with heterogenous wetting property provides durable permeation and sep-aration efficiency for durable emulsion separation, which sheds light on a new approach for the development of ideal oil/water separation membranes.
引用
收藏
页数:9
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