Applied Surface Science, Vol.423, 293-304, 2017
Tuning the superhydrophobicity of magnesium stearate decorated ZnO porous structures for self-cleaning urinary coatings
In this study, we developed a superhydrophobic coating comprising of porous ZnO and magnesium stearate (MgSt(2)) by cost-effective drop casting technique. Porous ZnO powder is employed here to generate essential roughness for the superhydrophobic coating. A sonication process is adopted to decorate magnesium stearate over hierarchical ZnO structures. Characteristic studies like X-ray diffraction, Fourier transform infra-red spectroscopy, Scanning probe microscopy, Scanning electron microscopy, Energy dispersive X-ray analysis were used to understand the physico-chemical properties of the fabricated ZnOMgSt(2) coatings. The composite coating was optimized with response surface methodology and by that, a water contact angle of 170.9. was achieved in these coatings. Highest achieved WCA of the optimized coating was correlated with the factors like roughness, contact angle hysteresis, work of adhesion and adhesion. Further, the extreme hydrophobic coating was tested for anti-staining, self-cleaning and urine repellant properties. Results observed after these tests vindicate the potent of this coating in development of stainless and maintenance-less urine repellant surfaces. (C) 2017 Elsevier B.V. All rights reserved.
Keywords:Magnesium stearate decorated ZnO;Self-cleaning surface;Anti-staining surface;Superhydrophobicity;Urine repellant surface