Process for preparing polyacrylic acid-Kynoar polyblend separation film and polyblend resin

A technology of polyvinylidene fluoride and polyacrylic acid, applied in the direction of semi-permeable membrane separation, membrane technology, chemical instruments and methods, etc. Eliminate problems such as shedding, achieve the effects of inhibiting migration and transformation, improving hydrophilic properties, and increasing efficiency

Inactive Publication Date: 2007-07-25
YANSHAN UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, surface grafting modification will have adverse effects on the physical properties of the separation membrane, such as changing the micropore structure and pore size distribution on the surface of the separation membrane, and in some cases, the grafted hydrophilic groups will fall off, etc. The presence of polyvinylidene fluoride will affect the performance of the separation membrane of polyvinylidene fluoride, and ultimately limit the application of polyvinylidene fluoride separation membrane in various fields

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0023] 1) Preparation of blended casting solution:

[0024] The preparation process of 1L blended casting solution is: dissolve 120g polyvinylidene fluoride, 35g polyvinylpyrrolidone, and 10g polyethylene glycol with N,N-dimethylacetamide;

[0025] After the temperature of the solution is slightly cooled, add 60ml of acrylic acid and 20g of acrylamide, and stir to fully dissolve;

[0026] Then 15g terephthaloyl was added to the mixed solution to fully dissolve;

[0027] During the dissolution process, the temperature of the blended casting solution is controlled at 50°C to 60°C. After the components in the casting solution are fully dissolved, the temperature of the casting solution is slowly increased, and the temperature is controlled at 70°C to 80°C. After 2 hours, the blended cast Place the solution in a water bath for 3-5 hours for degassing, and the temperature of the water bath is 40°C-50°C;

[0028] 2) Preparation of polyacrylic acid-polyvinylidene fluoride blended s...

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PUM

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Abstract

A process for preparing polyacrylic acid-polyvinylidene fluoride mixed separating membrane and mixed resin features that the polyvinylidene fluoride, acrylic acid, N, N-dimethyl acetylamine, polyethanediol, polyvinyl pyrrolidone, acrylamide, and p-phenyldimethylacyl are used as raw materials and the acrylic acid polymer is uniformed doped in said separating film and resin to improve their hydrophilicity.

Description

technical field [0001] The invention relates to a performance improvement of a polymer material, in particular to a preparation process of a polyacrylic acid-polyvinylidene fluoride blended separation membrane and a blended resin. Background technique [0002] Polyvinylidene fluoride separation membrane technology operates at room temperature, has no phase change, and has obvious energy-saving effects. It has the advantages of high filtration accuracy, low production pollution, large water output and good quality. Through the sieving and interception of the membrane, it has an excellent removal effect on suspended particles and colloidal pollutants in the water body. Polyvinylidene fluoride separation membranes have excellent pollution resistance and chemical oxidation resistance, and can effectively remove suspended particles and colloidal pollutants in water bodies. Realize the removal of water-soluble heavy metal ions. The treatment process of conventional drinking wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/44
Inventor 宋来洲
Owner YANSHAN UNIV
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