TY - JOUR
T1 - Durable superhydrophobic polyvinylidene fluoride membranes via facile spray-coating for effective membrane distillation
AU - Lin, Jiuyang
AU - Du, Jiale
AU - Xie, Shuangling
AU - Yu, Fan
AU - Fang, Shengqiong
AU - Yan, Zhongsen
AU - Lin, Xiaocheng
AU - Zou, Dong
AU - Xie, Ming
AU - Ye, Wenyuan
N1 - Funding Information:
J. Lin, D. Zou and W. Ye would like to thank the funding support from the Natural Science Foundation of Fujian Province (Grant No.: 2021J01628 ), Natural Science Foundation of Jiangsu Province ( SBK2022041812 ; Grant No.: BK20220492 ) and Fujian Provincial Department of Science and Technology (Grant No.: 2019Y0006 ). M. Xie also thanked financial support from the Royal Society ( IEC\NSFC\211021 ).
PY - 2022/9/15
Y1 - 2022/9/15
N2 - Membrane wetting and fouling substantially limits application and deployment of membrane distillation process. Designing high-performance superhydrophobic membranes offers an effective solution to solve the challenge. In this work, a highly durable superhydrophobic surface (water contact angle of 170.8 ± 1.3°) was constructed via a facile and rapid spray-coating of extremely hydrophobic SiO2 nanoparticles onto a porous polyvinylidene fluoride (PVDF) substrate for membrane distillation. The superhydrophobic membrane coated by fluorinated SiO2 nanoparticles exhibited a superior physicochemical stability in a wide range of extreme environments (i.e., NaOH, HCl, hot water, rust water, humic acid solution, ultrasonication, and high-speed water scouring). During 8-h continuous membrane distillation desalination experiment, the coated superhydrophobic membrane experienced a consistently stable water vapor flux (ca. 19.1 kg·m−2·h−1) and desalination efficiency (99.99 %). Additionally, such a stable superhydrophobicity endowed the spray-coated PVDF membrane to overcome membrane wetting and fouling during membrane distillation of highly saline solutions containing foulants (i.e., humic acid and rust). Results reported in this study provides a useful concept and strategy in facile construction of robust superhydrophobic membranes via spray-coating for effective membrane distillation.
AB - Membrane wetting and fouling substantially limits application and deployment of membrane distillation process. Designing high-performance superhydrophobic membranes offers an effective solution to solve the challenge. In this work, a highly durable superhydrophobic surface (water contact angle of 170.8 ± 1.3°) was constructed via a facile and rapid spray-coating of extremely hydrophobic SiO2 nanoparticles onto a porous polyvinylidene fluoride (PVDF) substrate for membrane distillation. The superhydrophobic membrane coated by fluorinated SiO2 nanoparticles exhibited a superior physicochemical stability in a wide range of extreme environments (i.e., NaOH, HCl, hot water, rust water, humic acid solution, ultrasonication, and high-speed water scouring). During 8-h continuous membrane distillation desalination experiment, the coated superhydrophobic membrane experienced a consistently stable water vapor flux (ca. 19.1 kg·m−2·h−1) and desalination efficiency (99.99 %). Additionally, such a stable superhydrophobicity endowed the spray-coated PVDF membrane to overcome membrane wetting and fouling during membrane distillation of highly saline solutions containing foulants (i.e., humic acid and rust). Results reported in this study provides a useful concept and strategy in facile construction of robust superhydrophobic membranes via spray-coating for effective membrane distillation.
KW - Antifouling
KW - Desalination
KW - Fluorinated SiO nanoparticles
KW - Membrane distillation
KW - Spray-coating
KW - Superhydrophobicity
UR - http://www.scopus.com/inward/record.url?scp=85132753484&partnerID=8YFLogxK
U2 - 10.1016/j.desal.2022.115925
DO - 10.1016/j.desal.2022.115925
M3 - Article
AN - SCOPUS:85132753484
SN - 0011-9164
VL - 538
JO - Desalination
JF - Desalination
M1 - 115925
ER -