Preparation method of polyvinylidene fluoride separation membrane

A polyvinylidene fluoride and separation membrane technology, which is applied in semipermeable membrane separation, chemical instruments and methods, membranes, etc., can solve problems that need to be improved, and achieve excellent corrosion resistance

Inactive Publication Date: 2016-03-30
CHANGSHU 3F ZHENFU NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Corrosion resistance, heat resistance, cold resistance, oxidation resistance, and weather resistance of existing ultrafiltration membranes, separation membranes, and hollow fiber membranes need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of a polyvinylidene fluoride separation membrane, using polyvinylidene fluoride as the raw material of the film, and the polyvinylidene fluoride is prepared through the following steps:

[0021] 1) Put 1 to 2 parts by weight of hexyldecanol, 0.8 parts by weight of hydrogen peroxide, and 1.1 parts by weight of inorganic alkali solution into the reaction kettle, mix well, then put in 1.6 parts by weight of polyoxyethylene oleate, 14.5 parts by weight of dichlorodifluoromethane Solvent, 1.8 parts by weight of phenylmethylsulfonyl fluoride solution, stirred and reacted at -6°C for 25 minutes;

[0022] 2) Then add 1.3 parts by weight of sodium oleoyl amino acid, 2.2 parts by weight of hexyldecanol solution, 59 parts by weight of vinylidene fluoride monomer, and 1.8 parts by weight of methylcyclopentane, stir and react at 18°C, and the pressure drops below 0.23MPa When the reaction is terminated;

[0023] 3) Filter, wash and dry to obtain powdered polyvi...

Embodiment 2

[0025] The preparation method of the polyvinylidene fluoride separation membrane uses polyvinylidene fluoride as the raw material of the film, and the polyvinylidene fluoride is prepared through the following steps:

[0026] 1) Put 1 weight part of hexyldecanol, 0.8 weight part of hydrogen peroxide, 1.1 weight part of inorganic alkali solution in the reaction kettle, mix evenly, then drop into 1.6 weight part of polyoxyethylene oleate, 14.5 weight part of dichlorodifluoromethane solvent, 1.8 parts by weight of phenylmethylsulfonyl fluoride solution, stirred and reacted at -6°C for 25 minutes;

[0027] 2) Then add 1.3 parts by weight of sodium oleoyl amino acid, 2.2 parts by weight of hexyldecanol solution, 59 parts by weight of vinylidene fluoride monomer, and 1.8 parts by weight of methylcyclopentane, stir and react at 18°C, and the pressure drops below 0.23MPa When the reaction is terminated;

[0028] 3) Filter, wash and dry to obtain powdered polyvinylidene fluoride.

Embodiment 3

[0030] The preparation method of the polyvinylidene fluoride separation membrane uses polyvinylidene fluoride as the raw material of the film, and the polyvinylidene fluoride is prepared through the following steps:

[0031] 1) Put 2 parts by weight of hexyldecanol, 0.8 parts by weight of hydrogen peroxide, and 1.1 parts by weight of inorganic alkali solution into the reactor, mix well, then drop into 1.6 parts by weight of polyoxyethylene oleate, 14.5 parts by weight of dichlorodifluoromethane solvent, 1.8 parts by weight of phenylmethylsulfonyl fluoride solution, stirred and reacted at -6°C for 25 minutes;

[0032] 2) Then add 1.3 parts by weight of sodium oleoyl amino acid, 2.2 parts by weight of hexyldecanol solution, 59 parts by weight of vinylidene fluoride monomer, and 1.8 parts by weight of methylcyclopentane, stir and react at 18°C, and the pressure drops below 0.23MPa When the reaction is terminated;

[0033] 3) Filter, wash and dry to obtain powdered polyvinylidene...

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PUM

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Abstract

The invention discloses a preparation method of a polyvinylidene fluoride separation membrane. Polyvinylidene fluoride is taken as a membrane raw material; and the preparation method comprises following steps: 1) by weight, 1 to 2 parts of hexyldecanol, 0.8 part of hydrogen peroxide, and 1.1 parts of an inorganic base solution are delivered into a reaction vessel for uniform mixing, 1.6 parts of poly(ethylene glycol) monooleate, 14.5 parts of dichlorodifluoromethane solvent, and 1.8 parts of phenylmethylsulfonyl fluoride solution are subjected to 25min of reaction at -6 DEG C with stirring; 2) 1.3 parts of sodium oleoyl amino fatty acid, 2.2 parts of a hexyldecanol solution, 59 parts of vinylidene fluoride monomer, and 1.8 parts of methylcyclopentane are delivered into the reaction vessel, an obtained mixture is subjected to reaction at 18 DEG C with stirring, and reaction is stopped when pressure is reduced to be lower than 0.23MPa; and 3) an obtained product is filtered, washed, and dried so as to obtain polyvinylidene fluoride powder. The polyvinylidene fluoride separation membrane possesses corrosion resistance, heat resistance, cold resistance, oxidation resistance, and weather resistance.

Description

technical field [0001] The invention relates to a preparation method of a polyvinylidene fluoride separation membrane. Background technique [0002] The corrosion resistance, heat resistance, cold resistance, oxidation resistance and weather resistance of existing ultrafiltration membranes, separation membranes and hollow fiber membranes need to be improved. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing a polyvinylidene fluoride separation membrane. Using polyvinylidene fluoride as the raw material of the membrane, the prepared membrane has excellent corrosion resistance, heat resistance, cold resistance, oxidation resistance and weather resistance. [0004] In order to achieve the above object, the technical solution of the present invention is to design a method for preparing a polyvinylidene fluoride separation membrane, using polyvinylidene fluoride as the raw material of the film, and the polyvinylidene fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/02B01D67/00
CPCB01D67/0006B01D69/02B01D71/34B01D2325/22B01D2325/30
Inventor 金飞宗建青邹建良沈达
Owner CHANGSHU 3F ZHENFU NEW MATERIALS CO LTD
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