TY - JOUR
T1 - Constructing A Janus membrane with extremely asymmetric wettability for water unidirectional permeation and switchable emulsion separation
AU - He, Huaqiang
AU - Wu, Yue
AU - Wang, Yuan
AU - Zhang, Tie Jun
AU - Zhang, Tian C.
AU - Yuan, Shaojun
N1 - Funding Information:
The authors acknowledged the financial support from Sichuan Province Science and Technology Department Support Program ( 2021YFH0045 ), the National Natural Science Foundation of China ( 21978182 ), and the Miaozi Project in Science and Technology Innovation Program of Sichuan Province of China (21-YCG021). They also appreciate Dr. Yingming Zhu from the Institute of New Energy and Low Carbon Technology of Sichuan University for the measurement of XRD pattern, SEM imaging and EDS spectra, Dr. Xiang Lin, Dr. Ji Li, Dr. Wen Tian, Mr. Pan Wu and Dr. Jie Wei from the Engineering Teaching Center, School of Chemical Engineering, Sichuan University for the FTIR, COD, DLS and KFMT measurements, and Miss Panpan Li from Shiyanjia Lab (www.shiyanjia.com) for the XPS analyses.
Funding Information:
The authors acknowledged the financial support from Sichuan Province Science and Technology Department Support Program (2021YFH0045), the National Natural Science Foundation of China (21978182), and the Miaozi Project in Science and Technology Innovation Program of Sichuan Province of China (21-YCG021). They also appreciate Dr. Yingming Zhu from the Institute of New Energy and Low Carbon Technology of Sichuan University for the measurement of XRD pattern, SEM imaging and EDS spectra, Dr. Xiang Lin, Dr. Ji Li, Dr. Wen Tian, Mr. Pan Wu and Dr. Jie Wei from the Engineering Teaching Center, School of Chemical Engineering, Sichuan University for the FTIR, COD, DLS and KFMT measurements, and Miss Panpan Li from Shiyanjia Lab (www.shiyanjia.com) for the XPS analyses.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/12/15
Y1 - 2022/12/15
N2 - The anisotropic Janus membrane with double side-opposite wettability shows a great potential for switchable emulsion separation, but it remains a challenge to construct a Janus membrane with good mechanical stability, extremely asymmetric wettability, and excellent anti-fouling performance. In this study, a novel Janus copper mesh membrane with extremely asymmetric wettability was rationally constructed for water unidirectional permeation and emulsion separation. The superhydrophilic CuO nanosheets lower skin layer of the novel Janus membrane was fabricated by the chemical oxidation method, while the superhydrophobic γ-Fe2O3@PVDF upper skin layer was deposited on the CuO-coated mesh surface by elaborately tuning the transient state of the electrospraying and electrospinning. The as-prepared Janus membrane exhibited a tightly interlocking structure with extremely asymmetric wettability and delivered water unidirectional permeation and efficient separation of both oil-in-water and water-in-oil emulsions. After separation with such Janus membrane, the residual oil contents in the filtrates after oil-in-water emulsion separation were all less than 50 mg/L, and the residual water contents in the filtrates after water-in-oil emulsion separation were lower than 150 mg/L. The Janus membrane was further demonstrated desirable anti-fouling ability and superior recycle stability. Therefore, this novel Janus membrane may be potentially used as a next-generation membrane for a broad field-scale application in smart oil/water separation.
AB - The anisotropic Janus membrane with double side-opposite wettability shows a great potential for switchable emulsion separation, but it remains a challenge to construct a Janus membrane with good mechanical stability, extremely asymmetric wettability, and excellent anti-fouling performance. In this study, a novel Janus copper mesh membrane with extremely asymmetric wettability was rationally constructed for water unidirectional permeation and emulsion separation. The superhydrophilic CuO nanosheets lower skin layer of the novel Janus membrane was fabricated by the chemical oxidation method, while the superhydrophobic γ-Fe2O3@PVDF upper skin layer was deposited on the CuO-coated mesh surface by elaborately tuning the transient state of the electrospraying and electrospinning. The as-prepared Janus membrane exhibited a tightly interlocking structure with extremely asymmetric wettability and delivered water unidirectional permeation and efficient separation of both oil-in-water and water-in-oil emulsions. After separation with such Janus membrane, the residual oil contents in the filtrates after oil-in-water emulsion separation were all less than 50 mg/L, and the residual water contents in the filtrates after water-in-oil emulsion separation were lower than 150 mg/L. The Janus membrane was further demonstrated desirable anti-fouling ability and superior recycle stability. Therefore, this novel Janus membrane may be potentially used as a next-generation membrane for a broad field-scale application in smart oil/water separation.
KW - Asymmetric wettability
KW - CuO nanosheets
KW - Janus membrane
KW - Switchable emulsion separation
KW - γ-FeO@PVDF nanofibrous
UR - http://www.scopus.com/inward/record.url?scp=85139023078&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2022.122254
DO - 10.1016/j.seppur.2022.122254
M3 - Article
AN - SCOPUS:85139023078
SN - 1383-5866
VL - 303
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 122254
ER -