High-flux aromatic polyamide reverse osmosis membrane and preparation method thereof

The invention provides a high-flux aromatic polyamide reverse osmosis membrane and a preparation method thereof. The reverse osmosis membrane comprises a non-woven fabric, a polysulfone porous support layer and a polyamide desalination layer, wherein the polyamide desalination layer is formed by an aqueous phase solution of m-phenylenediamine and an oil phase solution of trimesoyl chloride through an interfacial polycondensation reaction. The reverse osmosis membrane provided by the invention simultaneously has the characteristics of high flux, high desalination rate and reduced flux attenuation after long-time operation, the desalination rate of the reverse osmosis membrane is 98.0% or more and the permeation flux is 60.0 L/(m < 2 >. H) or more at the temperature of 25 DEG C and the concentration of 250mg/L as raw water under the operation pressure of 0.41 MPaG, and the permeation flux attenuation amplitude is lower than 15% after the reverse osmosis membrane continuously operates for 90 hours. The membrane