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Wednesday, 18 September 2019
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Raw materials & technologies, Technologies, Functional coatings

Functional coatings: Preparing a polydimethylsiloxane based superhydrophobic coating

Monday, 11 August 2014

In a study, researchers developed a simple and easy way to prepare a polydimethylsiloxane (PDMS)/CaCO3 based superhydrophobic coating.

The contact angle and sliding angle were measured for the superhydrophobic coating

Source: Rainer Schmittchen/Fotolia

The contact angle and sliding angle were measured for the superhydrophobic coating

Source: Rainer Schmittchen/Fotolia

The obtained coating can be applied to different substrates such as craft paper, glass slide and copper sheet. After being dried under ambient condition, the water contact angle and sliding angle on the coating surface were tested to evaluate the wettability of the coating surface.

Coating exhibits good abrasion resistance

Results showed that the contact angle and sliding angle on the obtained superhydrophobic coating with the optimum ratio of PDMS and nano-CaCO3 particles can reach 160° and 3°, respectively. Mechanism of the wettability change of the coating surface was analysed. Moreover, robustness of the superhydrophobic coating against mechanical shear and adhesion strength of the superhydrophobic coating were tested, and the results demonstrated that the coating surface was stable.

The study is published in: Surface and Coatings Technology, Volume 254, 15 September 2014, Pages 97-103.

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