Fabrication and Characteristic of Oil/Water Separation Membrane by Polyvinyl Alcohol

• Main Authors: Ching-Wei Wang, 王勁崴
• Other Authors: Ping-Szu Tsai
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/588zp2

碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系碩士在職專班 === 103 === This study used stainless steel mesh to dip in the solution contained polyvinyl alcohol(thickener, PVA) and acrylamide(monomer, AM), followed by the baking or UV-light curing process to obtain compactly PAM oil-water separation membrane. The effects of membrane’s monomer conversion, mesh coverage and the efficiency and the rate of oil-water separation were discussed by the thickeners(PAM or PVA), the proportion of PVA and AM, the baking temperature and the polymerization procedure. Experimental data showed that the ability of oil-water separation was enhanced owing to better dispersion of PVA thickener. On the condition of adding proportion of 3 : 1, membrane had optimal concentration of AM and the better ability of oil-water separation; on the condition of adding proportion of 1 : 1, membrane had higher concentration of AM, oil or water cannot pass through the membrane; on the condition of adding proportion of 7 : 1, membrane had lower concentration of AM, the oil droplets will pass through the membrane. Higher baking temperature(80℃) will enhance the conversion of PAM and improve the ability of oil-water separation. Process on the UV illumination after baking(P1 process) makes the mesh bigger and the oil-water separation efficiency lower. Process on the baking after UV illumination(P2 process) makes the mesh smaller , oil-water separation efficiency higher and oil-water separation rate lower. At last, the effect of ability of oil-water separation on the surface tension, specific gravity and density of wasted oil-water were discussed on the oil types, temperature of wasted oil-water, concentration of sodium chloride, surfactant and sonication. The results showed that the more difference on the surface tension between oil and water, the lower oil-water separation efficiency; the higher wasted oil-water temperature will decrease the ability of oil-water separation. Increasing the concentration of sodium chloride resulted in the increasing the disparity of wasted oil-water specific gravity and the speed of wasted oil-water separation. Adding surfactant caused oil droplets emulsified and sonication process caused oil droplets physically broken to narrow particle size. Both decreased the ability of wasted oil-water separation.