Chemical modification technique for microfiltering separation film of polyvinylidene fluoride

A polyvinylidene fluoride, chemical modification technology, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., to achieve the effect of improving hydrophilic properties, expanding application fields, and simple operation
CN1772359AInactive Publication Date: 2006-05-17YANSHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YANSHAN UNIV
Publication Date
2006-05-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention is chemical modification technique for grafting radical with hydrophilic and ion exchange performance onto the surface of hollow fiber microfiltering film and plate microfiltering film of polyvinylidene fluoride. By using acrylic acid, PVA, acrylamide, methylene bis-acrylamide, potassium persulfate and other reagents as material and through chemical cross-linking polymerization reaction, carboxyl radical and hydroxyl radical are grafted onto the surface of the microfiltering film. The technique has the advantages of simple operation and high grafting efficiency, and can improve the hydrophilic performance of the microfiltering film and raise the treating capacity of the microfiltering film. The modified microfiltering film can eliminate the suspended matter, colloid matter and water soluble heavy metal ion in water simultaneously, and has raised drinking water purifying effect and expanded application field of microfiltering film of polyvinylidene fluoride.
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Description

technical field

[0001] The invention relates to the chemical modification technology of the polyvinylidene fluoride microfiltration separation membrane, in particular to the performance improvement of the polymer microfiltration separation membrane. The invention improves the hydrophilic performance of the microfiltration separation membrane, realizes the adsorption and removal of water-soluble heavy metal ions by the microfiltration membrane, improves the water supply purification performance of the microfiltration separation membrane, and promotes the development of sewage treatment and recycling. Inventions belong to the field of technological transformation of polymer materials and the research and development of new materials in the field of environmental science and engineering. Background technique

[0002] Microfiltration separation membrane technology has the characteristics of high filtration precision, large water output and good quality. Through the sieving and ...

Claims

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