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Research Paper

Preparation and hydrophobic behaviours of polystyrene composite coating

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Pages 95-101 | Received 01 Aug 2014, Accepted 17 Jan 2015, Published online: 12 Feb 2016
 

Abstract

A polystyrene (PS)/paraffin wax composite coating with excellent hydrophobic property was prepared on stainless steel strainer using a simple, inexpensive immersion drying method. The thickness and bonding strength of the composite coating were measured. Scanning electron microscopy (SEM) was used to characterise the coating surface of the stainless steel strainer. The effects of the paraffin concentration in the PS composite coating and the drying temperature of the coating were studied. The contact angles for oil and water were investigated. The results indicated that the composite coating on stainless steel strainer obtained the best hydrophobic property under paraffin concentration 5 mg mL− 1 and drying temperature 50°C. The water contact angle reached 154 ± 1°, and the coating of the stainless steel strainer also showed a distinct oleophilic characteristic, which could be used for oil–water separation.

Acknowledgements

This research is supported by the National Natural Science Foundation of China (No. 51305459) the Science Foundation of China University of Petroleum, Beijing (No. 2462013YJRC032) and the Tribology Science Fund of State Key Laboratory of Tribology (No. SKLTKF14A08).

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