Method for preparing temperature-sensitive polyvinylidene fluoride intelligent membrane material and its product

A polyvinylidene fluoride and smart membrane technology, which is applied in the preparation of temperature-sensitive polyvinylidene fluoride smart membrane materials and its products, can solve the problems of reduced membrane flux, PNIPA swelling degree, and membrane pore changes. Raw membrane filtration level and other issues, to achieve the effect of simple process, easy industrial implementation, and prevent shedding
CN1743351AInactive Publication Date: 2006-03-08TIANJIN POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN POLYTECHNIC UNIV
Publication Date
2006-03-08
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

This invention relates to a method for prparing temperature-sensitive polyvinylidene flourine intelligent membrane. The method is: NIPA as grafted monomer, PVDF as macromelocular initiator, cuprous chloride as catalyst,4,4 demethyl 2,2 bipyridine as ligand, using atom transfer free radical process, preparation of temperature-sensitive polyvinylidene flourine intelligent membrane comprising: in reaction kettle, adding 7-13% PVDF(WT%) and solvent N-methyl-2-pyrrolidone,heating to 50 deg. C to make it solve completely; then adding grafted monomer NIPA, its mol ratio with cuprous chloride is 2000:1-2500:1,filling nitrogen gas 30mins. at stirring, and separately adding 0.20-025g ligand 4,4-dimethyl 2,2-bipyridine and 0.04-0.06g catalyst cupous chloride, stirring and heating to 80-120deg.C,constant reaction 19-25 hrs; then washing reaction product using pure water to obtain light brown solid, filtering and 80 C degree drying to obtain finish product.
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Description

technical field

[0001] The invention relates to a membrane material preparation method and product technology, in particular to a temperature-sensitive and temperature-responsive N-isopropylacrylamide (NIPA) graft copolymerized with polyvinylidene fluoride (PVDF) The preparation method and products of type polyvinylidene fluoride intelligent membrane material belong to the field of functional polymer materials, and the international patent classification number is proposed to be Int.Cl 7 C08F 20 / 54. Background technique

[0002] Membrane is the core of membrane technology. The chemical properties of the membrane material and the membrane structure play a decisive role in the membrane separation process. Membrane materials must have the following basic functions: good selective permeability; certain hydrophobicity or hydrophilicity; excellent chemical resistance and biodegradation resistance, which can be used for a long time without deterioration; good heat resistance; Me...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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