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Hydrophilic film material and preparation method thereof

A technology of hydrophilic membrane and membrane material, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of anti-pollution performance and insufficient hydrophilic performance, achieve strong hydrophilic performance and reduce usage , Improve the effect of performance

Inactive Publication Date: 2010-07-14
何涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem of insufficient anti-pollution performance and hydrophilic performance of existing membrane materials, and to provide a membrane material with hydrophilic and interconnected pore structures

Method used

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  • Hydrophilic film material and preparation method thereof
  • Hydrophilic film material and preparation method thereof
  • Hydrophilic film material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 20 grams of polyethersulfone, 8 grams of polyethylene glycol (weight-average molecular weight: 200,000 Daltons), dissolved in 75 grams of dimethylacetamide and 6 grams of n-butanol (additive) mixed solvent at 100 ° C and fully stirred In , the proximity ratio α of the solution is 0.75. After the polymer was completely dissolved, it was filtered through a stainless steel mesh with a pore size of 40 microns and left to stand in an oven at 100°C for defoaming. Using a stainless steel spatula with a thickness of 200 microns, the polymer solution was applied to a glass plate, placed in air (25°C, relative humidity 60%) for about 10 seconds, then immersed in 45°C water for phase separation and solidification. After the membrane material is completely cured, take out the membrane material for further cleaning. After cleaning, the membrane material was soaked in potassium persulfate solution with a concentration of 8000ppm for 6 hours for post-treatment, and then the pure wate...

Embodiment 2

[0033] 20 grams of polysulfone, 8 grams of polyethylene glycol (weight average molecular weight 200,000 Daltons), dissolved in 75 grams of dimethylacetamide and 6 grams of diethylene glycol (additive) mixed solvent at 80 ° C and fully stirred In , the proximity ratio α of the solution is 0.56. After the polymer was completely dissolved, it was filtered through a stainless steel mesh with a pore size of 40 microns and left to stand in an oven at 100°C for defoaming. Using a stainless steel spatula with a thickness of 200 microns, the polymer solution was applied to a glass plate, placed in air (25°C, relative humidity 60%) for about 10 seconds, then immersed in 40°C water for phase separation and solidification. After the membrane material is completely cured, take out the membrane material for further cleaning. After cleaning, the membrane material was immersed in a hydrogen peroxide solution with a concentration of 6000ppm for 12 hours for post-treatment, and then the pure w...

Embodiment 3

[0035] 18 grams of polyetherimide and 15 grams of cellulose acetate were dissolved in 65 grams of nitrogen methylpyrrolidone and 25 grams of PEG400 mixed solvent at 120° C. with sufficient stirring. After the polymer is completely dissolved, it is filtered through a stainless steel mesh with a pore size of 40 microns and left to defoam. The proximity ratio α of the solution is 0.5. Using a stainless steel spatula with a thickness of 300 microns, the polymer solution was applied to a glass plate, placed in air (22°C, relative humidity 55%) for about 2 seconds, and then immersed in 30°C water for phase separation and solidification. After the membrane material is completely cured, take out the membrane material for further cleaning. After cleaning, the membrane material was soaked in a potassium persulfate solution with a concentration of 50000ppm for 4 hours for post-treatment, and then the pure water permeability of the membrane was measured to be 550L m -2 ·hr -1 · bar -1...

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Abstract

The invention discloses a hydrophilic film material and a preparation method thereof. The film material is formed by winding amorphous high molecules and hydrophilic high molecules. The structure of the film material is divided into a compact surface layer and a pore supporting structure connected with the compact surface layer, wherein both the compact surface layer and the pore supporting structure have interconnected pore structures. The film material has hydrophilicity through physical cross-linking of a film-forming material and the hydrophilic high molecules on production molecular scale; and the contact angle of water on a film surface of the hydrophilic film material is about 0 degree; and therefore, the method improves the service performance of the film material, reduces the replacement frequency of the film material, reduces the using amount of chemical medicaments, reduces the using cost of film technology and provides good core material for broad application of the film.

Description

technical field [0001] The invention belongs to the field of polymer membrane materials, and in particular relates to a membrane material with hydrophilic and interconnected pore structures and a preparation method thereof. Background technique [0002] Due to the substantial reduction in the manufacturing cost of membrane materials and the gradual maturity of sewage treatment technologies such as membrane bioreactor technology, membrane technology has become one of the most important technologies in environmental protection. In recent years, porous organic membrane materials have been used in industrial wastewater and municipal sewage. The process is constantly being developed. The treatment objects faced by membrane materials are roughly divided into two categories: one is the water source with relatively clean raw water, such as surface water, groundwater, urban pipeline water, or sewage after advanced treatment; the other is the sewage source with relatively complex wate...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D69/02
Inventor 何涛李雪梅潘成张云燕王周为殷勇
Owner 何涛
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