A novel composite coating mesh film for oil-water separation

doi:10.1007/s11705-009-0149-x

Front Chem Eng Chin

2009, Vol. 3

Issue (1) : 112-118 https://doi.org/10.1007/s11705-009-0149-x

RESEARCH ARTICLE

A novel composite coating mesh film for oil-water separation

Futao QIN, Zhijia YU(

), Xinhui FANG, Xinghua LIU, Xiangyu SUN

School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China

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Abstract

Polytetrafluoroethylene-polyphenylene sulfide composite coating mesh film was successfully prepared by a simple layered transitional spray-plasticizing method on a stainless steel mesh. It shows super-hydrophobic and super-oleophilic properties. The contact angle of this mesh film is 156.3° for water, and close to 0° for diesel oil and kerosene. The contact angle hysteresis of water on the mesh film is 4.3°. The adhesive force between the film and substrate is grade 0, the flexibility is 1 mm and the pencil hardness is 4H. An oil-water separation test was carried out for oil-contaminated water in a six-stage super-hydrophobic film separator. The oil removal rate can reach about 99%.

Keywords super-hydrophobic super-oleophilic composite coating mesh film separation of oil and water

Corresponding Author(s): YU Zhijia,Email:yuzhijia@dl.cn

Issue Date: 05 March 2009

Cite this article:

Futao QIN,Zhijia YU,Xinhui FANG, et al. A novel composite coating mesh film for oil-water separation[J]. Front Chem Eng Chin, 2009, 3(1): 112-118.

URL:

https://academic.hep.com.cn/fcse/EN/10.1007/s11705-009-0149-x
https://academic.hep.com.cn/fcse/EN/Y2009/V3/I1/112

Fig.1 1 oily feed water tank; 2 pump; 3 flow meter; 4 oily feed water inlet; 5 oil outlet; 6 water outlet; 7 oil tank; 8 water tank
Flow chart of oil-water separation

Fig.2 1 oily feed water inlet; 2 mesh film; 3 water outlet; 4 oil outlet
Sketch of one-stage film separator

Fig.3 Relationship between pore diameters and the CA of water on the corresponding mesh film

Fig.4 (a) Digital photograph and (b) optical image of water droplet on the mesh film

Fig.5 (a)-(f)Processes of kerosene passing through the mesh film easily

Fig.6 (a) Firstly, a drop of water is dripped on the mesh film; (b)-(f) then some drops of kerosene are dripped on the water drop on the mesh film

Tab.1 Feasibility test of PTFE-PPS composite coating mesh films

Tab.2 Corrosion resistance test results of mesh films (being immersed in different solution for 60 days)

Fig.7 Oil removal rate vs. the number of separation stage for different content of oil in feed

Fig.8 SEM images of the prepared mesh film

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