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Inorganic pollution resistance antibacterial reverse osmosis membrane and preparation method thereof

A reverse osmosis membrane and inorganic technology, applied in the field of water treatment, can solve the problems of polyamide layer without substantial binding force, polyamide membrane binding force is not enough, easy to hydrolyze and fall off, etc., to improve the ability of anti-inorganic pollution, realize large-scale and Continuity, effect of low equipment operation requirements

Active Publication Date: 2014-06-04
BEIJING JIUZHANG ENVIRONMENTAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing anti-pollution technology mainly contains three classes, one, the method for coating PVA (polyvinyl alcohol) coating on the functional layer surface, two, improve the hydrophilicity of diaphragm, three, weaken the electronegativity of surface, as CN1213985, CN1923348, but the PVA molecule has not been cross-linked, and has no substantial binding force with the polyamide layer, it is very easy to hydrolyze and fall off during operation, and eventually loses its effect
Therefore patent CN101130444 adopts to add a certain amount of catalyst and cross-linking agent in the solution, the strength of the diaphragm antifouling layer prepared in this way is improved to some extent, but the bonding force with the polyamide membrane of the substrate is not enough, and the reverse osmosis membrane is still not enough in the use process Stable, sometimes falling off

Method used

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  • Inorganic pollution resistance antibacterial reverse osmosis membrane and preparation method thereof
  • Inorganic pollution resistance antibacterial reverse osmosis membrane and preparation method thereof
  • Inorganic pollution resistance antibacterial reverse osmosis membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Composite reverse osmosis membranes were prepared in the following steps:

[0019] (1) Solution preparation: Weigh 2.5g of polyvinyl alcohol 1499 and 1g of titanium dioxide powder, stir and dissolve in 1000g of water, then weigh 1.5g of maleic anhydride and add it to obtain a mixed functional solution.

[0020] (2) The basic reverse osmosis membrane is completely immersed in the mixed solution for 5 seconds, and then placed in an oven at 80° C. for 10 minutes to obtain an anti-pollution composite reverse osmosis membrane.

Embodiment 2

[0022] Composite reverse osmosis membranes were prepared in the following steps:

[0023] (1) Solution preparation: weigh 4g of polyvinyl alcohol 1799 and 0.5g of titanium dioxide powder, stir and dissolve in 1000g of water, then weigh 0.5g of glyoxal and add it to obtain a mixed functional solution.

[0024] (2) The basic reverse osmosis membrane is completely immersed in the mixed solution for 10 seconds, and then placed in an oven at 100°C for 8 minutes to obtain an anti-pollution composite reverse osmosis membrane.

Embodiment 3

[0026] Composite reverse osmosis membranes were prepared in the following steps:

[0027] (1) Solution preparation: Weigh 3g of polyvinyl alcohol 2699 and 0.2g of alumina powder, stir and dissolve in 1000g of water, then weigh 1.5g of glutaraldehyde and add it to obtain a mixed functional solution.

[0028] (2) The basic reverse osmosis membrane is completely immersed in the mixed solution for 10 seconds, and then placed in an oven at 100°C for 10 minutes to react to obtain an anti-pollution composite reverse osmosis membrane.

[0029] The flux and effective desalination rate of the diaphragm produced according to the above specific examples, rolled into a household membrane module and the spiral-wound membrane element in the prior art are shown in Table 1:

[0030] Table 1

[0031]

[0032]

[0033] Table 2 is the comparison of the initial flux and the flux after running for 15 hours between the anti-fouling membrane module of the present invention and the spiral woun...

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Abstract

The invention relates to an inorganic pollution resistance antibacterial reverse osmosis membrane and a preparation method thereof. According to the invention, by the curing of a hydroxy polymer and the cross-linking of nano sterilization particles, a cross-linked dense mesh coating is formed on the surface of a basic reverse osmosis membrane comprising a non-woven fabric layer, a polymer supporting layer and a polyamide functional layer through high temperature treatment; and meanwhile, due to the reaction of hydroxyl groups and membrane surface groups, the strength of an anti-pollution layer is greatly reinforced, the inorganic resistance capacity of the reverse osmosis membrane is improved and the service life of the reverse osmosis membrane is effectively prolonged. The sterilization particles are uniformly distributed on the membrane surface and are cross-linked in the coating, so that not only is the antibacterial activity improved, but also the antibacterial timeliness is prolonged. The preparation method of the reverse osmosis membrane, which is disclosed by the invention, is simple and convenient, is easy to operate, has no specific requirement on equipment and has the characteristic of high salt rejection.

Description

technical field [0001] The invention belongs to the technical field of water treatment. Specifically, the present invention relates to a reverse osmosis membrane and a preparation method thereof, in particular to an inorganic pollution-resistant composite reverse osmosis membrane with antibacterial characteristics and a preparation method thereof. Background technique [0002] Reverse osmosis technology is a high-end water treatment technology based on the principle of osmotic pressure. It realizes the separation of water and different solutes. Compared with other technologies, it has a simpler operation method and can effectively remove salts, small molecular acids, aldehydes, Organic substances and colloids such as phenol. Applications include desalination of seawater, desalination of brackish water, purification of drinking water, production of industrial ultrapure water, and reuse of industrial wastewater such as papermaking, electroplating, petrochemical, pharmaceutica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/56
Inventor 王美许家旺许家昌姜训镜
Owner BEIJING JIUZHANG ENVIRONMENTAL ENG CO LTD
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