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Method and device for preparing reverse osmosis membrane capable of resisting biological pollution

A technology of anti-biological pollution and reverse osmosis membrane, applied in the direction of reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of short service life, no antibacterial and bactericidal effect, etc.

Inactive Publication Date: 2017-05-10
XIAMEN RUNNER IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, reverse osmosis membranes such as cellulose acetate membranes, aromatic polyhydrazide membranes or aromatic polyamide membranes are easily oxidized and have a short service life. At the same time, they do not have antibacterial and bactericidal effects.

Method used

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  • Method and device for preparing reverse osmosis membrane capable of resisting biological pollution

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Embodiment 1

[0027] A method for preparing an anti-biological fouling reverse osmosis membrane, comprising the following steps: passing the reverse osmosis membrane substrate through an ethylene glycol ethyl acrylate organic phase containing 1% propenylguanidine at a speed of 0.1m / min In the process, the solvent used in the organic phase is N,N-dimethylacetamide, and then passes through the ammonium persulfate solution containing 2% of the organic phase at a speed of 0.1m / min, and the solution also contains a mass fraction of 5% NaCl, after the cross-linking reaction, it is dried in a 50°C oven, and finally wind-cooled before winding.

Embodiment 2

[0029] A method for preparing an anti-biological fouling reverse osmosis membrane, comprising the following steps: passing the reverse osmosis membrane substrate through the organic phase of ethylene glycol ethyl acrylate containing 1% aminoacrylic acid at a speed of 0.1m / min , the solvent used in the organic phase is N,N-dimethylacetamide, and then passed through the ammonium persulfate solution containing 2% of the mass fraction of the organic phase at a speed of 0.1m / min, and the solution also contains a mass fraction of 5% NaCl, after the cross-linking reaction, it is dried in a 50°C oven, and finally wind-cooled and wound.

Embodiment 3

[0031] A method for preparing an anti-biological fouling reverse osmosis membrane, comprising the steps of: passing the reverse osmosis membrane substrate through an acrylic acid amino-2-methyl-propane containing 1% propenylguanidine at a speed of 0.2 m / min In the sulfonic acid organic phase, the solvent used in the organic phase is dimethyl sulfoxide, and then passes through the ammonium persulfate solution containing 3% of the organic phase with a mass fraction at a speed of 0.2m / min, and the solution also contains a mass fraction of 5% NaCl, after the cross-linking reaction, it is dried in a 50°C oven, and finally wind-cooled before winding.

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Abstract

The invention discloses a method for preparing a reverse osmosis membrane capable of resisting biological pollution. The method comprises the following steps: putting a reverse osmosis membrane substrate into an organic phase containing an antibacterial additive, wherein the organic phase is ethylene glycol ethyl acrylate or acrylic amino-2-methyl-propanesulfonic acid; then, treating the reverse osmosis membrane substrate by using a water phase containing an initiator; carrying out drying treatment to obtain the reverse osmosis membrane capable of resisting the biological pollution. The invention also discloses a device for preparing the reverse osmosis membrane capable of resisting the biological pollution. The reverse osmosis membrane prepared by the method not only has good pure water flux and salt removing rate, but also has excellent biological pollution resistance.

Description

technical field [0001] The invention relates to the technical field of water treatment and concentration separation, in particular to a method and device for preparing a reverse osmosis membrane against biological pollution. Background technique [0002] Reverse osmosis membrane is an artificial semipermeable membrane made of simulated biological semipermeable membrane, generally made of polymer materials, such as cellulose acetate membrane, aromatic polyhydrazide membrane or aromatic polyamide membrane. The diameter of micropores on the surface of the reverse osmosis membrane is generally between 0.1-1nm, and the permeability is related to the chemical structure of the membrane itself. Reverse osmosis membranes can be used in chemical unit operations such as separation, concentration, and purification, and are mainly used in pure water preparation and water treatment industries. [0003] The reverse osmosis membrane uses the pressure difference as the driving force to sepa...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D61/02C02F1/44
CPCY02A20/131B01D69/125B01D61/02B01D67/0083B01D67/0095B01D2323/30B01D2323/42B01D2325/48C02F1/441
Inventor 金碧陈玲彭晓璊李明仁
Owner XIAMEN RUNNER IND CORP
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