| 摘要 |
PURPOSE:To obtain the title reverse osmosis membrane with improved performance by treating the surface of a polysulfone membrane carrier with plasma, polymerizing furfuryl alcohol in the presence of sulfuric acid, and uniformly forming a polymer thin membrane. CONSTITUTION:A polysulfone porous membrane having 10Angstrom -1mum pore diameter is treated with plasma in a gaseous nitrogen atmosphere at 0.01-0.1Torr. The treatment with plasma is carried out at 40-70W output for 1-20min by using a 13.56MHz high-frequency power source. The membrane is then dipped for about 1-30min in a soln. consisting of furfuryl alcohol, concd. sulfuric acid, and distilled water to carry out the polymerization of furfuryl alcohol, and a polymer thin membrane is formed on the surface of the polysulfone membrane. From 1 to 3.5g furfuryl alcohol and 1-3.5ml concd. sulfuric acid are dissolved in 100ml distilled water, and the soln. is used as the liq. reactant. The membrane is then dried in an oven at 120-160 deg.C for 10-20min, dipped in a 0.1% aq. barium hydroxide soln. to neutralize the sulfuric acid, and washed with water. |
