Reverse osmosis membrane based on polysulfone material

Abstract

The invention relates to the technical field of reverse osmosis membranes, in particular to a reverse osmosis membrane based on a polysulfone material. The reverse osmosis membrane comprises a support body which is a polyester knitted fabric subjected to stiff finishing; a polysulfone layer which is formed on the support body and has pores formed in a surface thereof; a compact layer which is arranged on the polysulfone layer, plays a desalting role and is a polyamide layer doped with graphene oxide. The stiff polyester knitted fabric is used as a supporting body, so that the overall strength of the reverse osmosis membrane is enhanced; the polysulfone layer is used as a supporting layer, the manufacturing cost of the reverse osmosis membrane is reduced, the membrane manufacturing procedure is simplified, and the polysulfone material is good in mechanical strength and environmentally friendly; the polyamide layer doped with the graphene oxide is used as the compact layer, and graphene has extremely high hydrophilicity and extremely good antibacterial activity, so that the water flux of the reverse osmosis membrane is enhanced, and the problems that the water flux becomes small due to dirt accumulation after the reverse osmosis membrane is used for a long time, and the reverse osmosis efficiency is reduced are solved.

Description

technical field [0001] The invention relates to the technical field of reverse osmosis membranes, in particular to a reverse osmosis membrane based on polysulfone material. Background technique [0002] Reverse osmosis membrane is an artificial semipermeable membrane with certain characteristics made by simulating biological semipermeable membrane, and is the core component of reverse osmosis technology. The principle of reverse osmosis technology is to separate these substances from water based on the fact that other substances cannot pass through the semi-permeable membrane under the action of the osmotic pressure higher than the solution. The membrane pore size of the reverse osmosis membrane is very small, so it can effectively remove dissolved salts, colloids, microorganisms, organic matter, etc. in water. [0003] The composite membrane is mainly made of the above two materials, and it is composed of a very thin dense layer and a porous support layer. The porous supp...

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Problems solved by technology

[0004] However, since the reverse osmosis membrane has a multi-layer structure, its thickness will be larger than that of a general single-layer membrane. Although the desalination performance has been improved, the water flux will become smaller due to the accumulation of dirt after long-term use, which will reduce the reverse osmosis efficiency.