TY - JOUR
T1 - Facile surface coating of metal-tannin complex onto PVDF membrane with underwater Superoleophobicity for oil-water emulsion separation
AU - Yang, Jie
AU - Wang, Lulu
AU - Xie, Atian
AU - Dai, Xiaohui
AU - Yan, Yongsheng
AU - Dai, Jiangdong
N1 - Publisher Copyright:
© 2020
PY - 2020/5/15
Y1 - 2020/5/15
N2 - In this study, inspired by self-cleaning property of fish scale in water, a novel superhydrophilic and underwater superoleophobic tannin-metal complex@polyvinylidene fluoride (TA-Fe@PVDF) nanocomposite membrane was prepared by a facile and one-pot surface coating technology at room temperature using the ferric nitrate and tannic acid as the building blocks. The as-fabricated TA-Fe@PVDF nanocomposite membrane was characterized by scanning electron microscopy (SEM), attenuated total reflection fourier transform infrared spectroscopy (ATR-IR), atomic force microscope (AFM) and contact angle measuring instrument. It was found that the TA-Fe complexes improved the surface wetting, separation efficiency and repeatability. The optimal TA-Fe@PVDF-1 composite membrane was obtained at the concentration ratio of TA and Fe3+ of 1:3, which show underwater oil contact angle of 155°, and low oil adhesion. The separation efficiencies of TA-Fe@PVDF-1 composite membrane for various oil-water mixtures and oil-in-water emulsions are higher than 99.5%. The membrane flux can reach 2551 L m−2 h−1 bar−1 for surfactant-stabilized petroleum ether-in-water emulsion separation, and 4505 L m−2 h−1 bar−1 for petroleum ether/water mixture. This nanocomposite membrane exhibits excellent repeatability and good chemical stability (salt/acid/alkali resistance), to be potentially applied for the treatment of oily wastewater.
AB - In this study, inspired by self-cleaning property of fish scale in water, a novel superhydrophilic and underwater superoleophobic tannin-metal complex@polyvinylidene fluoride (TA-Fe@PVDF) nanocomposite membrane was prepared by a facile and one-pot surface coating technology at room temperature using the ferric nitrate and tannic acid as the building blocks. The as-fabricated TA-Fe@PVDF nanocomposite membrane was characterized by scanning electron microscopy (SEM), attenuated total reflection fourier transform infrared spectroscopy (ATR-IR), atomic force microscope (AFM) and contact angle measuring instrument. It was found that the TA-Fe complexes improved the surface wetting, separation efficiency and repeatability. The optimal TA-Fe@PVDF-1 composite membrane was obtained at the concentration ratio of TA and Fe3+ of 1:3, which show underwater oil contact angle of 155°, and low oil adhesion. The separation efficiencies of TA-Fe@PVDF-1 composite membrane for various oil-water mixtures and oil-in-water emulsions are higher than 99.5%. The membrane flux can reach 2551 L m−2 h−1 bar−1 for surfactant-stabilized petroleum ether-in-water emulsion separation, and 4505 L m−2 h−1 bar−1 for petroleum ether/water mixture. This nanocomposite membrane exhibits excellent repeatability and good chemical stability (salt/acid/alkali resistance), to be potentially applied for the treatment of oily wastewater.
KW - Oil-water separation
KW - PVDF membrane
KW - Superhydrophilic
KW - Surface coating
KW - Tannin-metal complex
KW - Underwater superoleophobic
UR - http://www.scopus.com/inward/record.url?scp=85082673532&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2020.125630
DO - 10.1016/j.surfcoat.2020.125630
M3 - 文章
AN - SCOPUS:85082673532
SN - 0257-8972
VL - 389
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
M1 - 125630
ER -