CF4 plasma-modified superhydrophobic PVDF membranes for direct contact membrane distillation

Chi Yang; Xue Mei Li; Jack Gilron; Ding feng Kong; Yong Yin; Yoram Oren; Charles Linder; Tao He

doi:10.1016/j.memsci.2014.01.013

CF₄ plasma-modified superhydrophobic PVDF membranes for direct contact membrane distillation

Chi Yang, Xue Mei Li, Jack Gilron, Ding feng Kong, Yong Yin, Yoram Oren, Charles Linder, Tao He

Zuckerberg Institute for Water Research

Research output: Contribution to journal › Article › peer-review

208 Scopus citations

Abstract

High performance superhydrophobic PVDF flat sheet membranes for direct contact membrane distillation (DCMD) were prepared via CF₄ plasma surface modification. The performance of the virgin and CF₄ modified membranes was examined using sodium chloride solution (4wt%) as feed in a DCMD process. Results reveal that CF₄ surface modification yielded superhydrophobic membranes (water contact angle: 162.4°) with about 30% higher water flux than the virgin PVDF membrane. The underlying mechanism that leads to the significant improvement in membrane performance was investigated in detail with respect to membrane morphology, gas permeability, liquid entry pressure, and contact angle measurements. Results indicate that the combination of increased gas permeability and superhydrophobicity contributes mostly to the improved water flux.

Original language	English
Pages (from-to)	155-161
Number of pages	7
Journal	Journal of Membrane Science
Volume	456
DOIs	https://doi.org/10.1016/j.memsci.2014.01.013
State	Published - 15 Apr 2014

Keywords

Contact angle
Membrane distillation
PVDF
Plasma
Superhydrophobic

ASJC Scopus subject areas

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

Access to Document

10.1016/j.memsci.2014.01.013

Cite this

@article{f21e369dcb7d4b02be2aa034a3e87318,

title = "CF4 plasma-modified superhydrophobic PVDF membranes for direct contact membrane distillation",

abstract = "High performance superhydrophobic PVDF flat sheet membranes for direct contact membrane distillation (DCMD) were prepared via CF4 plasma surface modification. The performance of the virgin and CF4 modified membranes was examined using sodium chloride solution (4wt%) as feed in a DCMD process. Results reveal that CF4 surface modification yielded superhydrophobic membranes (water contact angle: 162.4°) with about 30% higher water flux than the virgin PVDF membrane. The underlying mechanism that leads to the significant improvement in membrane performance was investigated in detail with respect to membrane morphology, gas permeability, liquid entry pressure, and contact angle measurements. Results indicate that the combination of increased gas permeability and superhydrophobicity contributes mostly to the improved water flux.",

keywords = "Contact angle, Membrane distillation, PVDF, Plasma, Superhydrophobic",

author = "Chi Yang and Li, {Xue Mei} and Jack Gilron and Kong, {Ding feng} and Yong Yin and Yoram Oren and Charles Linder and Tao He",

note = "Funding Information: The authors are grateful for the partial financial support from National Natural Science Fund China (Project nos. 21176119 and 51206114 ), the National Key Basic Research Program of China (973 Program) (Project nos. 2012CB932800 (TH) and 2009CB623402 ). ",

year = "2014",

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doi = "10.1016/j.memsci.2014.01.013",

language = "English",

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journal = "Journal of Membrane Science",

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T1 - CF4 plasma-modified superhydrophobic PVDF membranes for direct contact membrane distillation

AU - Yang, Chi

AU - Li, Xue Mei

AU - Gilron, Jack

AU - Kong, Ding feng

AU - Yin, Yong

AU - Oren, Yoram

AU - Linder, Charles

AU - He, Tao

N1 - Funding Information: The authors are grateful for the partial financial support from National Natural Science Fund China (Project nos. 21176119 and 51206114 ), the National Key Basic Research Program of China (973 Program) (Project nos. 2012CB932800 (TH) and 2009CB623402 ).

PY - 2014/4/15

Y1 - 2014/4/15

N2 - High performance superhydrophobic PVDF flat sheet membranes for direct contact membrane distillation (DCMD) were prepared via CF4 plasma surface modification. The performance of the virgin and CF4 modified membranes was examined using sodium chloride solution (4wt%) as feed in a DCMD process. Results reveal that CF4 surface modification yielded superhydrophobic membranes (water contact angle: 162.4°) with about 30% higher water flux than the virgin PVDF membrane. The underlying mechanism that leads to the significant improvement in membrane performance was investigated in detail with respect to membrane morphology, gas permeability, liquid entry pressure, and contact angle measurements. Results indicate that the combination of increased gas permeability and superhydrophobicity contributes mostly to the improved water flux.

AB - High performance superhydrophobic PVDF flat sheet membranes for direct contact membrane distillation (DCMD) were prepared via CF4 plasma surface modification. The performance of the virgin and CF4 modified membranes was examined using sodium chloride solution (4wt%) as feed in a DCMD process. Results reveal that CF4 surface modification yielded superhydrophobic membranes (water contact angle: 162.4°) with about 30% higher water flux than the virgin PVDF membrane. The underlying mechanism that leads to the significant improvement in membrane performance was investigated in detail with respect to membrane morphology, gas permeability, liquid entry pressure, and contact angle measurements. Results indicate that the combination of increased gas permeability and superhydrophobicity contributes mostly to the improved water flux.

KW - Contact angle

KW - Membrane distillation

KW - PVDF

KW - Plasma

KW - Superhydrophobic

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