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Method for preparing porous membrane by virtue of non-solvent induced phase method

A non-solvent, porous membrane technology, applied in the field of materials, to achieve the effect of shortening the cleaning cycle

Inactive Publication Date: 2017-02-01
TIANJIN BISHUIYUAN MEMBRANE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] 2. There is the problem of agglomeration of metal oxides

Method used

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  • Method for preparing porous membrane by virtue of non-solvent induced phase method
  • Method for preparing porous membrane by virtue of non-solvent induced phase method
  • Method for preparing porous membrane by virtue of non-solvent induced phase method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: A method for preparing a porous membrane by a non-solvent phase-induced method, using a non-solvent phase-induced method to dope submicron metal oxides to prepare hollow fiber, flat and tubular membranes with catalytic, hydrophilic, and antibacterial properties;

[0038] Prepare materials according to the following components (weight ratio):

[0039] PVDF resin content 30,

[0040] Submicron level metal oxide content 10,

[0041] Additive 80,

[0042] Organic salt dispersant 10,

[0043] Solvent 70.

[0044] The additive is one or more of polyvinylpyrrolidone, polyethylene glycol, polymethyl methacrylate and polyacrylonitrile with different molecular weights.

[0045]Submicron metal oxides have different particle sizes, in the range of 0.10-1000 microns, transition metals such as nickel oxides, iron oxides, aluminum oxides, magnesium oxides, copper oxides, and zinc oxides One or more of oxides and their oxyhydroxides.

[0046] One or a mixture of organi...

Embodiment 2

[0049] Embodiment 2: A method for preparing a porous membrane by a non-solvent phase-induced method, comprising the following steps;

[0050] Table 1:

[0051]

[0052] The specific implementation formula,

[0053] Do test 1, test 2, test 3, test 4, test 5, test 6 according to the formula in Table 1:

[0054] Test Characterization of Trials:

[0055] Electron microscope photos such as figure 1 (test 4), figure 2 (test 5), image 3 (Test 6) shows:

[0056] Test 1, Test 2, Test 3 and Test 4, Test 5, and Test 6 are comparative tests using nickel oxides, iron oxides, aluminum oxides, magnesium oxides, Copper oxide, zinc oxide and other transition metal oxides and one or more of their oxyhydroxides,

[0057] The test mainly illustrates the following rules:

[0058] 1. The transition metal oxides and their oxyhydroxides with larger particles are not easy to be lost, but the catalytic effect is poor;

[0059] 2. The antibacterial effect decreases with the increase of tra...

Embodiment 3

[0062] Example 3: A method for preparing a porous membrane by a non-solvent-induced phase method, using a non-solvent-induced phase method to dope submicron metal oxides to prepare hollow fiber, flat and tubular membranes with catalytic, hydrophilic, and antibacterial properties;

[0063] Prepare materials according to the following components (weight ratio):

[0064] Polyvinylidene fluoride resin content 15,

[0065] Submicron level metal oxide content 0.1,

[0066] additive 10,

[0067] Organic salt dispersant 0.1,

[0068] Solvent 40.

[0069] The additive is one or more of polyvinylpyrrolidone, polyethylene glycol, polymethyl methacrylate and polyacrylonitrile with different molecular weights.

[0070] Submicron metal oxides have different particle sizes, in the range of 0.10-1000 microns, transition metals such as nickel oxides, iron oxides, aluminum oxides, magnesium oxides, copper oxides, and zinc oxides One or more of oxides and their oxyhydroxides.

[0071] One ...

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Abstract

The invention relates to a method for preparing a porous membrane by virtue of a non-solvent induced phase method and belongs to the technical field of materials. The method comprises the following steps: doping a submicron-grade metal oxide by virtue of the non-solvent induced phase method so as to prepare hollow fiber, flat sheets and tubular membranes which have catalytic property, hydrophily and antibacterial property; preparing the materials in parts by weight: 15-30 parts of polyvinylidene fluoride resin, 0.1-10 parts of submicron-grade metal oxide, 10-80 parts of an additive, 0.1-10 parts of an organic salt dispersing agent and 40-70 parts of a solvent; and stirring the mixture of the materials at 25-80 DEG C, standing or carrying out vacuum defoamation, and spinning by virtue of the non-solvent induced phase method, so as to prepare the porous membrane having the catalytic property, hydrophily and antibacterial property. According to the method, one or more submicron-grade transition metal oxides are synthesized and added into casting film liquid, so that the hydrophily of the hollow fiber or the flat sheet membrane is improved, and meanwhile, the catalysis in the oxygenolysis of ozone and sodium hypochlorite into organic matters is achieved.

Description

technical field [0001] The invention relates to a method for preparing a porous membrane by a non-solvent phase-induced method, and belongs to the field of material technology. Background technique [0002] Catalytic hydrophilic properties: a transition metal oxide with one or more submicron levels can play a catalytic role in the oxidation and decomposition of organic matter by ozone and sodium hypochlorite, and the submicron level transition metal oxides have good affinity watery. [0003] Bactericidal properties: There are many hydroxyl groups and atomic oxygen on the surface of transition metal oxides. The hydroxides formed on the surface use the oxygen dissolved in the solution to generate superoxide ions, etc., which interact with the organic matter in the bacteria to kill the bacteria. [0004] Porous membrane: a separation membrane with a porosity of 70-80% of the total volume, uniform pore size, and a pore size range of 0.001-20 μm. [0005] By synthesizing one or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4318D01F1/10
CPCD04H1/4318D01F1/10D01F1/103
Inventor 陈亦力张向涛代攀彭兴峥丑树人
Owner TIANJIN BISHUIYUAN MEMBRANE MATERIAL CO LTD
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