Excellent wetting resistance and anti-fouling performance of PVDF membrane modified with superhydrophobic papillae-like surfaces

Wang, Ziyi1,4; Tang, Yuanyuan1; Li, Baoan2,3

2017-10-15

10.1016/j.memsci.2017.06.073

JOURNAL OF MEMBRANE SCIENCE   影响因子和分区

0376-7388

1873-3123

With hydrophobicity as a basic requirement for membrane used in membrane distillation (MD) process, the membrane wetting and fouling can be effectively alleviated with superhydrophobic surface. Since the applications of existing methods were usually restricted by certain limitations, it is highly essential to develop a facile and effective approach to fabricate a superhydrophobic surface for MD process. In this study, a one-step method was employed for superhydrophobic coating with papillae-like structure on polyvinylidene fluoride (PVDF) membrane surface. The variations in surface morphology and water contact angle (WCA) were explicated as functions of PVDF and polybasic alcohol mixture (PG) contents in coating solution, the immersion temperature and time. The optimal modification was conducted in a 45 degrees C coating solution for 35 s with 2 wt% of PVDF and 30 wt% of PG, resulting in a superhydrophobic surface with a maximum WCA of 156.8 degrees. Moreover, the performance of the modified membrane was compared with the original membrane in MD process with different feeds. The modified membrane demonstrated the excellent wetting and fouling resistance after superhydrophobic modification. Through the efficient one-step fabrication for superhydrophobic papillae-like surfaces, this study proposed a promising strategy to improve the performance of PVDF membrane in the MD process.

Membrane modification Superhydrophobic Micro/nano-papillae structure Wetting resistance Anti-fouling performance

SCI ; EI

英语

第一 ; 通讯

National Key Technology R & D Program of China[2006BAB03A06]

Engineering ; Polymer Science

Engineering, Chemical ; Polymer Science

WOS:000407954300040

ELSEVIER SCIENCE BV

20172703878763

Coatings ; Distillation ; Fluorine compounds ; Fouling ; Hydrophobicity ; Membranes ; Surface properties

Chemical Operations:802.3 ; Coating Materials:813.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
2.Tianjin Univ, Sch Chem Engn & Technol, Chem Engn Res Ctr, Tianjin 300354, Peoples R China
3.Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300354, Peoples R China
4.Nankai Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

Wang, Ziyi,Tang, Yuanyuan,Li, Baoan. Excellent wetting resistance and anti-fouling performance of PVDF membrane modified with superhydrophobic papillae-like surfaces[J]. JOURNAL OF MEMBRANE SCIENCE,2017,540:401-410.

Wang, Ziyi,Tang, Yuanyuan,&Li, Baoan.(2017).Excellent wetting resistance and anti-fouling performance of PVDF membrane modified with superhydrophobic papillae-like surfaces.JOURNAL OF MEMBRANE SCIENCE,540,401-410.

Wang, Ziyi,et al."Excellent wetting resistance and anti-fouling performance of PVDF membrane modified with superhydrophobic papillae-like surfaces".JOURNAL OF MEMBRANE SCIENCE 540(2017):401-410.