Spray-coating process in preparing PTFE-PPS composite super-hydrophobic coating | Zendy

Rui Weng | Zendy; Haifeng Zhang | Zendy; Xiaowei Liu | Zendy

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Spray-coating process in preparing PTFE-PPS composite super-hydrophobic coating

Author(s) -

Rui Weng,

Haifeng Zhang,

Xiaowei Liu

Publication year - 2014

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4868377

Subject(s) - materials science , contact angle , coating , composite number , composite material , superhydrophobic coating , polytetrafluoroethylene , silicon dioxide , tetrafluoroethylene , silicon , adhesion , layer (electronics) , polymer , copolymer , metallurgy

In order to improve the performance of a liquid-floated rotor micro-gyroscope, the resistance of the moving interface between the rotor and the floating liquid must be reduced. Hydrophobic treatment can reduce the frictional resistance between such interfaces, therefore we proposed a method to prepare a poly-tetrafluoroethylene (PTFE)-poly-phenylene sulphide (PPS) composite super-hydrophobic coating, based on a spraying process. This method can quickly prepare a continuous, uniform PTFE-PPS composite super-hydrophobic surface on a 2J85 material. This method can be divided into three steps, namely: pre-treatment; chemical etching; and spraying. The total time for this is around three hours. When the PTFE concentration is 4%, the average contact angle of the hydrophobic coating surface is 158°. If silicon dioxide nanoparticles are added, this can further improve the adhesion and mechanical strength of the super-hydrophobic composite coating. The maximum average contact angle can reach as high as 164° when the mass fraction of PTFE, PPS and silicon dioxide is 1:1:1

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