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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Problems solved by technology

Biofilm is also used to treat raw water in water supply, but

Method used

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Example Embodiment

[0021] The present invention will be further explained below in conjunction with specific embodiments.

[0022] A method for preparing a nanometer filter membrane, which is characterized in that the method includes the following steps:

[0023] Step 1. Mix 4-nitro m-phenylenediamine, trimesoyl chloride and sodium hydroxide to prepare a mixed solution;

[0024] Step two, immerse the base membrane of the nano-grade filter membrane in the mixed solution for 4-15 minutes, clean the surface of the base membrane 3-6 times with deionized water, and dry;

[0025] Step 3. Immerse the base film dried in Step 2 in an acidic aqueous solution of sodium carboxymethyl cellulose for ion cross-linking. After immersing for 10-15 minutes, clean the surface of the base film 3-6 times with deionized water and dry;

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

[0027] The mass ratio of 4-nitro m-phenylenediamin...

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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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