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Preparing method of hydrophobic PVDF ultrafiltration membrane

An ultrafiltration membrane and hydrophilic technology, which is applied in the field of preparation of hydrophilic PVDF ultrafiltration membrane, can solve problems that need to be improved, and achieve excellent corrosion resistance

Inactive Publication Date: 2016-03-23
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 kind of preparation method of hydrophilic PVDF ultrafiltration membrane, take polyvinylidene fluoride as the raw material of film, described polyvinylidene fluoride is prepared by following steps:

[0021] 1) Put 1 to 2 parts by weight of polyvinylpyrrolidone, 1.9 parts by weight of hydrogen peroxide, and 2.3 parts by weight of inorganic alkali solution into the reactor, mix well, and then put in 1.8 parts by weight of distearyldimethylammonium chloride, 17.4 parts by weight of Chlorofluoroethane solvent, 1.7 parts by weight of isobutyryl chloride solution, stirred and reacted at -6.5°C for 38 minutes;

[0022] 2) Add 2.2 parts by weight of fatty alcohol ether sodium sulfate, 4.2 parts by weight of sodium polyacrylate solution, 73 parts by weight of vinylidene fluoride monomer, and 4.3 parts by weight of 1,2,3-trimethylcyclopentane, and stir at 11°C Reaction, the reaction is terminated when the pressure drops below 0.18MPa;

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

Embodiment 2

[0025] The preparation method of hydrophilic PVDF ultrafiltration 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 polyvinylpyrrolidone, 1.9 weight parts of hydrogen peroxide, 2.3 weight parts of inorganic alkali solution into the reaction kettle, mix evenly, then drop into 1.8 weight parts of distearyl dimethyl ammonium chloride, 17.4 weight parts of dichlorofluoro Ethane solvent, 1.7 parts by weight of isobutyryl chloride solution, stirred and reacted at -6.5°C for 38 minutes;

[0027] 2) Add 2.2 parts by weight of fatty alcohol ether sodium sulfate, 4.2 parts by weight of sodium polyacrylate solution, 73 parts by weight of vinylidene fluoride monomer, and 4.3 parts by weight of 1,2,3-trimethylcyclopentane, and stir at 11°C Reaction, the reaction is terminated when the pressure drops below 0.18MPa;

[0028] 3) Filter, wash and dry to obtain powdere...

Embodiment 3

[0030] The preparation method of hydrophilic PVDF ultrafiltration 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 polyvinylpyrrolidone, 1.9 parts by weight of hydrogen peroxide, and 2.3 parts by weight of inorganic alkali solution into the reaction kettle, mix evenly, then add 1.8 parts by weight of distearyldimethylammonium chloride, 17.4 parts by weight of dichlorofluoro Ethane solvent, 1.7 parts by weight of isobutyryl chloride solution, stirred and reacted at -6.5°C for 38 minutes;

[0032] 2) Add 2.2 parts by weight of fatty alcohol ether sodium sulfate, 4.2 parts by weight of sodium polyacrylate solution, 73 parts by weight of vinylidene fluoride monomer, and 4.3 parts by weight of 1,2,3-trimethylcyclopentane, and stir at 11°C Reaction, the reaction is terminated when the pressure drops below 0.18MPa;

[0033] 3) Filter, wash and dry to ob...

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Abstract

The invention discloses a preparing method of a hydrophobic PVDF ultrafiltration membrane. polyvinylidene fluoride is taken as the raw material of the membrane and is prepared by following steps: (1) according to parts by weight, adding 1-2 parts of polyvinylpyrrolidone and 1.9 parts of hydrogen peroxide, 2.3 parts of inorganic alkali solution into a reaction kettle, mixing uniformly, then adding 1.8 parts of dimethyl distearyl ammonium chloride, 17.4 parts of dichlorofluoroethane solvent and 1.7 parts of isobutyryl chloride solution, and stirring for reacting at -6.5 DEG C for 38min; (2) then, according to parts by weight, adding 2.2 parts of fatty alcohol ether sodium sulfate, 4.2 parts of sodium polyacrylate solution and 73 parts of vinylidene fluoride monomer, 4.3 parts of 1,2,3-trimethylcyclopentane, stirring for reacting at 11 DEG C, and terminating the reacting when pressure drops to be below 0.18MPa; (3) filtering, washing and drying to obtain powdery polyvinylidene fluoride. The hydrophobic PVDF ultrafiltration membrane has anticorrosive, heat resistant, cold resistant, antioxidant and weather resistant performances.

Description

technical field [0001] The invention relates to a preparation method of a hydrophilic PVDF ultrafiltration 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 hydrophilic PVDF ultrafiltration membrane. Polyvinylidene fluoride is used as the raw material of the membrane, and 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 hydrophilic PVDF ultrafiltration 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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IPC IPC(8): B01D71/34B01D67/00B01D69/02
CPCB01D67/0006B01D69/02B01D71/34B01D2325/30B01D2325/36
Inventor 金飞宗建青邹建良沈达
Owner CHANGSHU 3F ZHENFU NEW MATERIALS CO LTD
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