Fabrication of SiO2 wrapped polystyrene microcapsules by Pickering polymerization for self-lubricating coatings

Journal of Colloid and Interface Science
Haiyan LiHuaiyuan Wang

Abstract

The facile and efficient encapsulation of a lubricant oil in SiO2 wrapped polystyrene microcapsules is accomplished using a Pickering polymerization technique. Triton X-100-IPTS fumed SiO2 nanoparticles are used as emulsifiers for the formation of O/W Pickering emulsions and the stability factor of the Pickering emulsions was investigated. The as-obtained microcapsules are characterized by scanning electron microscope, thermogravimetric analysis, Fourier transform infrared spectra and dynamic laser scattering. These results suggest that the microcapsules display a spherical shape with a core content of ∼38.3%, an average diameter of 3.3 μm, a shell thickness is ∼900 nm and outstanding thermal stability for lubricant oil with a decomposition temperature of 250 °C. Moreover, the microcapsules are embedded into an epoxy resin for self-lubricating coatings. On the basis of frictional coefficient measurements and wear testing, the self-lubricating microcapsules-incorporated epoxy coatings on an aluminum plate indicate the excellent dispersibility of the microcapsules in coatings and the favorable antifriction effects.

References

Aug 31, 2010·Journal of Colloid and Interface Science·Justyna FrelichowskaYves Chevalier
Jun 11, 2011·Journal of Colloid and Interface Science·Kiyofumi KatagiriKunihito Koumoto
Jul 5, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Tianyou ChenZhiqiang Fan
May 9, 2014·Chemical Society Reviews·Jiafu ShiZhongyi Jiang
Oct 29, 2015·ACS Applied Materials & Interfaces·Lei GaoChao Wang
Aug 12, 2016·Soft Matter·Laure RidelYves Chevalier

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