Superhyrophilic and superoleophobic coating for separation oil/water mixture
Publish place: International Comprehensive Chemical Congress
Publish Year: 1396
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
CHCI01_007
تاریخ نمایه سازی: 21 بهمن 1397
Abstract:
The main objective of this project is preparing coatings with different wettability of water and oil on the 304 stainless steel mesh, for achieving phase separation . PDMS-NH2 resin and Perfluorooctanoic acid were used for achieving hydrophilicity and superoleophobicity, respectively. Dibutyltin dilaurate was added as a hardener and silica nanoparticles have been used to make the surface rough. The contact and slip angle measurements, Field Emission Scanning Electron Microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDS) and Fourier-transform infrared spectroscopy (FTIR) characterization were done on samples. Different concentrations of SiO2 nanoparticles were evaluated and ultimately 10 g/l silica nanoparticles were chosen as the optimal concentration. It was observed that in order to achieve the simultaneous superoleophobicity and hydrophilicity, the concentration of 1 g/l PDMS- NH2 should be chosen. Different amounts of superoleophobic component in the range of 300-900 ml/l were added to the solution and it was observed the optimal amount needed to react with a hydrophilic polymer was 200 m/l PFONa. After achieving a coating with different wettability of water and oil (oil contact angle= 144o and water contact angle =0o), an oil and water separation system with high separation efficiency of 96% was designed.
Keywords:
superhydrophilic , superoleophobic , stainless steel mesh , silica nanoparticle , separation of oil and water
Authors
Setareh Amirpoor
Department of Materials Science and Engineering, Sharif University of Technology Tehran, Iran
Abolghasem Dolati
Department of Materials Science and Engineering, Sharif University of Technology Tehran, Iran