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Citation: YE Wenbo, HUANG Shijun, GUAN Huaimin, TONG Yuejin. Preparation and Properties of Superhydrophobic Polysiloxane Coatings[J]. Chinese Journal of Applied Chemistry, ;2012, 29(10): 1123-1129. doi: 10.3724/SP.J.1095.2012.00529 shu

Preparation and Properties of Superhydrophobic Polysiloxane Coatings

YE Wenbo ^a,b ,
HUANG Shijun ^a,b ,
GUAN Huaimin ^a,b,, ,
TONG Yuejin ^b,c,,

1.
a College of Materials Science and Engineering, Fujian Normal University, Fuzhou 350007, China;
2.
b Fujian Key Laboratory of Polymer Materials, Fuzhou 350007, China;
3.
c College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou 350007, China

Corresponding author: GUAN Huaimin, TONG Yuejin,
Received Date: 28 November 2011
Available Online: 2 February 2012

Using methyltriethoxysilane(MTES) as precursor,the polysiloxane gels were obtained by a sol-gel approach based on the acid-base catalysis mechanisms.Subsequently,the superhydrophobic polysiloxane coatings were fabricated on a glass at room temperature by a simple dip coating technique.The chemical composition,hydrophobicity and morphology of the resultant coatings were investigated by Fourier transform infrared spectrum(FT-IR),water contact angle and field emission scanning electron microscopy(FE-SEM).It was confirmed that the polysiloxane network had partially end-capped methyl and residual silanol groups formed inside the coatings.The water contact angles reached as high as 160° and 162°,the water sliding angle as low as 7° for two coatings with the molar ratios of MTES,EtOH and H₂O at 1:35:8 and 1:45:8,respectively.Their superhydrophobicities could be retained even heat-treated up to 250℃.FE-SEM showed that the coating surface displayed a micro-nano-sized structure composed of micropore with diameter of 0.5~1.0 μm.The aggregates of nano particles were composed of primary smaller particles with diameter in the range of 50~100 nm.Meanwhile,the coatings possessed higher transparency,superhydrophobic properties for the corrosive liquid.It was expected that these superhydrophobic coatings may be attached on surfaces of glass,textile,metal substrates and so on for protecting and corrosion resistant layers.
- methyltriethoxysilane,
- polysiloxane,
- contact angle,
- superhydrophobic coating
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