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Method for improving water flux and anti-pollution capacity of polyamide reverse osmosis membrane

A technology of reverse osmosis membrane and polyamide, which is used in osmosis/dialysis water/sewage treatment, semi-permeable membrane separation, water/sewage treatment, etc., can solve the problem of low water flux and poor anti-pollution ability of polyamide composite reverse osmosis membrane and other problems, to achieve the effect of strong anti-pollution ability and improved water flux

Inactive Publication Date: 2016-06-15
SHANGHAI EMATE INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem of low water flux and poor anti-pollution ability of the existing polyamide composite reverse osmosis membrane

Method used

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  • Method for improving water flux and anti-pollution capacity of polyamide reverse osmosis membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Dissolve 20 parts by weight of polysulfone (P3500) in N-N, dimethylacetamide solution, add 0.2 parts of sodium dodecylsulfonate, mix well, apply it on the surface of non-woven fabric, immerse in water, remove solvent to obtain a porous support layer. The polysulfone support layer was immersed in 3% hydrogen peroxide solution, and treated with ultraviolet light for 10 minutes. Rinse the surface of the support layer repeatedly with deionized water, and after air-drying, immerse it in an aqueous solution with a concentration of m-phenylenediamine of 2%, and contact for 40s to form an aqueous phase liquid layer on the surface of the porous support layer to obtain a wet film; immerse the wet film in In the naphtha organic solution containing 0.05% trimellitic acid chloride, contact with it for 30s, interfacial polymerization reaction occurs with it, dry in an oven at 100°C for 2min, wash with deionized water several times, and obtain the treated polyamide composite Reverse ...

Embodiment 2

[0016] Dissolve 20 parts by weight of polysulfone (P3500) in N-N, dimethylacetamide solution, add 0.2 parts of sodium dodecylsulfonate, mix well, apply it on the surface of non-woven fabric, immerse in water, remove solvent to obtain a porous support layer. Rinse the surface of the support layer repeatedly with deionized water, and after air-drying, immerse it in an aqueous solution with a concentration of m-phenylenediamine of 2%, and contact for 40s to form an aqueous phase liquid layer on the surface of the porous support layer to obtain a wet film; immerse the wet film in In the naphtha organic solution containing 0.05% trimellitic acid chloride, contact with it for 30s, interfacial polymerization reaction occurs with it, dry in an oven at 100°C for 2 minutes, and wash with deionized water several times to obtain the treated polyamide Composite reverse osmosis membrane. Immerse the polyamide composite reverse osmosis membrane in an aqueous solution with a sodium sulfate c...

Embodiment 3

[0018] Dissolve 20 parts by weight of polysulfone (P3500) in N-N, dimethylacetamide solution, add 0.2 parts of sodium dodecylsulfonate, mix well, apply it on the surface of non-woven fabric, immerse in water, remove solvent to obtain a porous support layer. The polysulfone support layer was immersed in 3% hydrogen peroxide solution, and treated with ultraviolet light for 10 minutes. Wash it several times with deionized water, and after air-drying, immerse it in an aqueous solution with a concentration of m-phenylenediamine of 2%, and contact it for 40 seconds to form an aqueous phase liquid layer on the surface of the porous support layer to obtain a wet film; In the naphtha organic solution of 0.05% phenyltrimethyl acid chloride, contact with it for 30s, and interfacial polymerization reaction occurs with it, after drying in an oven at 100°C for 2 minutes, wash it several times with deionized water, and obtain the polyamide composite reaction after treatment. permeable membr...

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Abstract

The invention discloses a method for improving the water flux and anti-pollution ability of a polyamide reverse osmosis membrane, specifically: dissolving polysulfone in N-N, dimethylacetamide solution, adding sodium dodecylsulfonate, Mix well, apply and scrape on the surface of non-woven fabric, immerse in water, remove the solvent to obtain a polysulfone support layer, and then treat the polysulfone support layer with ultraviolet light; rinse the surface of the polysulfone support layer with deionized water repeatedly, and after air-drying, Immerse it in an aqueous solution of m-phenylenediamine, form an aqueous liquid layer on the surface of the polysulfone support layer, and prepare a wet film; immerse the wet film in a naphtha organic solution of trimellitic acid chloride, and interfacially polymerize with it Reaction; immersing the polyamide composite reverse osmosis membrane in an aqueous solution of sodium sulfate; then immersing it in an aqueous solution containing hydroxyethyl acrylate, and performing a contact reaction to obtain a high-flux anti-pollution polyamide composite reverse osmosis membrane. The invention has strong anti-pollution ability, and the water flux is improved compared with the traditional reverse osmosis membrane under the same pressure.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a method for improving the water flux and anti-pollution ability of a polyamide reverse osmosis membrane. Background technique [0002] Reverse osmosis can effectively remove organic matter, inorganic matter, bacteria, and other particles dissolved in water, and is the most important part of dialysis water treatment. The so-called osmosis means that two solutions of different concentrations are separated by a semi-permeable membrane. The solute in the water cannot pass through the semi-permeable membrane, and the water molecules on the side with the lower concentration will pass through the semi-permeable membrane to the other side with the higher concentration. concentrations are equal. The purification effect of reverse osmosis can reach the level of ions, and the exclusion rate of monovalent ions can reach more than 90%. [0003] Due to its excellent separation abi...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D71/56B01D67/00B01D69/12B01D69/02C02F1/44
CPCB01D71/68B01D67/0002B01D69/02B01D69/125B01D71/56B01D2325/36B01D2325/48C02F1/441
Inventor 张晓姮李剑
Owner SHANGHAI EMATE INDAL
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