Preparation method of high-flux nanofiltration membrane based on piperazine derivative

Abstract

The invention discloses a preparation method of a high-flux nanofiltration membrane based on a piperazine derivative. The preparation method comprises the following steps: pretreating a nanofiltration base membrane; the preparation method comprises the following steps: dissolving a novel water-phase monomer piperazine derivative into deionized water, and then performing ultrasonic treatment to prepare a water-phase solution; the preparation method comprises the following steps: mixing trimesoyl chloride and an n-hexane solvent to prepare an organic phase solution; the preparation method comprises the following steps: soaking a pretreated nanofiltration base membrane into a water phase solution, taking out the nanofiltration base membrane, draining off surface moisture, putting the nanofiltration base membrane into an organic phase solution to generate interfacial polymerization reaction, taking out the nanofiltration base membrane, draining off surface moisture, and soaking the nanofiltration base membrane into deionized water to obtain the novel water phase monomer high-flux nanofiltration membrane. An interfacial polymerization method is adopted on a nanofiltration base membrane, a traditional piperazine water-phase monomer is replaced with a novel polyamine water-phase monomer to prepare the nanofiltration membrane, and the addition of the polyamine water-phase monomer can enhance the hydrophilicity of the membrane and greatly improve the water flux, so that the rate of interfacial polymerization reaction and the completeness of reaction are greatly improved; the water permeability of the membrane is improved.

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