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Nanometer grade filter membrane, method for preparing same and application of nanometer grade filter membrane

A nano-scale, membrane-filtering technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of different separation technologies, achieve high water permeability, long service life, easy preparation and operation Effect

Active Publication Date: 2018-11-27
QINGDAO JUSTO PACKAGING
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Biofilm is also used to treat raw water in water supply, but it is different from filtration membrane separation technology

Method used

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Embodiment Construction

[0021] Below in conjunction with specific embodiment, further illustrate the present invention.

[0022] A method for preparing a nanoscale filter membrane, characterized in that the method comprises the following steps:

[0023] Step 1, mixing and stirring 4-nitrom-phenylenediamine, trimesoyl chloride and sodium hydroxide to obtain a mixed solution;

[0024] Step 2. Place the basement membrane of the nano-scale filter in the mixed solution and soak for 4-15 minutes, wash the surface of the basement membrane with deionized water for 3-6 times, and dry;

[0025] Step 3, immerse the dried basement membrane in step 2 in an acidic aqueous solution of sodium carboxymethylcellulose for ion cross-linking, after immersion for 10-15 minutes, use deionized water to clean the surface of the basement membrane 3-6 times, and dry;

[0026] Step 4: Dry the membrane sheet dried in Step 3 in an oven at 80° C. for 30-60 minutes to obtain a nanoscale filter membrane.

[0027] The mass ratio of...

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PUM

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Abstract

The invention discloses a method for preparing a nanometer grade filter membrane. The method includes impregnating base membranes for the nanometer grade filter membrane in mixed solution; washing thebase membranes by the aid of deionized water and drying the base membranes; impregnating carboxyl in sodium methyl cellulose acidic aqueous solution again and carrying out ionic cross-linking; carrying out washing by the aid of deionized water and carrying out drying to obtain the nanometer grade filter membrane. The method has the advantages that the nanometer grade filter membrane which is a reverse osmosis membrane is easy to prepare and operate; the nanometer grade filter membrane is high in water permeability and salt blocking rate and long in service life.

Description

technical field [0001] The invention relates to a nanoscale filter membrane and its preparation method and application. Background technique [0002] Membrane water treatment is a solid-liquid separation technology. It uses membrane pores to filter water and retain impurities in water without chemical changes. There is also a method of biofilm treatment of raw water in water supply, but it is different from filtration membrane separation technology. The membrane used for membrane separation is called membrane, and the membrane used for biofilm treatment is called film. [0003] The filter membrane is classified by the size of the intercepted raw water particles, and the membrane pores are divided into microfiltration membrane (MF), ultrafiltration membrane (UF), nanofiltration membrane (NF) and reverse osmosis membrane (RO) from coarse to fine. The MF membrane has a pore size of 0.05um or more, or a molecular weight of 1000 or more, and is aimed at removing colloids and hi...

Claims

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Application Information

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IPC IPC(8): B01D61/02B01D67/00B01D71/66B01D71/68C02F1/44
CPCB01D61/027B01D67/0002B01D71/66B01D71/68C02F1/442
Inventor 冯广义
Owner QINGDAO JUSTO PACKAGING
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