Preparation method of high-flux and anti-pollution reverse osmosis membrane and application of membrane
2014
The invention provides a preparation method of a high-flux and anti-pollution reverse osmosis membrane. The preparation method of the high-flux and anti-pollution reverse osmosis membrane comprises the following steps: soaking a support layer in an aqueous solution with multifunctional aromatic amine compounds, taking the support layer out, drying the support layer, then soaking the support layer in a multifunctional acyl chloride oil phase solution, volatilizing and drying the support layer, then soaking the support layer in a modifier for 10-600 seconds, taking the support layer out and poaching the support layer in pure water to obtain the high-flux and anti-pollution reverse osmosis membrane, wherein the modifier is selected from any one of monoethanolamine, diethanol amine, triethanolamine, dimethylaminoethanol, diethylaminoethanol, 2-amino-propanol, dimethyl amine isopropyl alcohol, 3-amino-isopropyl alcohol and the like. According to the high-flux and anti-pollution reverse osmosis membrane prepared by the method, the hydrophilcity of the membrane can be improved; the salt removing rate remains at the level before modification; the charge performance of the membrane surface is reduced; the effect of shielding pollution of the charge substances in the running water is reduced; the high-flux and anti-pollution reverse osmosis membrane is suitable for industrial production and capable of meeting the requirements for long-term operation under the ultra-low voltage condition.
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