Porous hollow polyvinylidene fluoride fiber membrane

A polyvinylidene fluoride and fiber membrane technology, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., can solve problems that need to be improved, and achieve excellent corrosion resistance

Inactive Publication Date: 2016-03-02
CHANGSHU LIYUAN MEMBRANE TECH
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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 polyvinylidene fluoride porous hollow fiber membrane, using polyvinylidene fluoride as the raw material of the membrane, the polyvinylidene fluoride is prepared through the following steps:

[0021] 1) Put 1 to 2 parts by weight of carboxymethyl cellulose, 2.8 parts by weight of hydrogen peroxide, and 3.6 parts by weight of inorganic alkali solution into the reaction kettle, mix well, then put in 0.8 parts by weight of sodium lauryl sulfate, 18.5 parts by weight of pentafluoroethyl An alkane solvent, 0.8 parts by weight of phenylmethylsulfonyl fluoride solution, stirred and reacted at -7°C for 45 minutes;

[0022] 2) Add 3.4 parts by weight of glycerol monostearate, 6.2 parts by weight of sodium tripolyphosphate solution, 69 parts by weight of vinylidene fluoride monomer, and 1.9 parts by weight of 2-methyl-1-ethylcyclopentane, in Stir the reaction at 23°C, and terminate the reaction when the pressure drops below 0.23MPa;

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

Embodiment 2

[0025] The polyvinylidene fluoride porous hollow fiber membrane uses polyvinylidene fluoride as the raw material of the membrane, and the polyvinylidene fluoride is prepared through the following steps:

[0026] 1) Put 1 part by weight of carboxymethyl cellulose, 2.8 parts by weight of hydrogen peroxide, and 3.6 parts by weight of inorganic alkali solution into the reaction kettle, mix well, and then put in 0.8 parts by weight of sodium lauryl sulfate and 18.5 parts by weight of pentafluoroethane solvent , 0.8 parts by weight of phenylmethylsulfonyl fluoride solution, stirred and reacted at -7°C for 45 minutes;

[0027] 2) Add 3.4 parts by weight of glycerol monostearate, 6.2 parts by weight of sodium tripolyphosphate solution, 69 parts by weight of vinylidene fluoride monomer, and 1.9 parts by weight of 2-methyl-1-ethylcyclopentane, in Stir the reaction at 23°C, and terminate the reaction when the pressure drops below 0.23MPa;

[0028] 3) Filtrate, wash, and dry to obtain po...

Embodiment 3

[0030] The polyvinylidene fluoride porous hollow fiber membrane uses polyvinylidene fluoride as the raw material of the membrane, and the polyvinylidene fluoride is prepared through the following steps:

[0031] 1) Put 2 parts by weight of carboxymethyl cellulose, 2.8 parts by weight of hydrogen peroxide, and 3.6 parts by weight of inorganic alkali solution into the reaction kettle, mix well, and then put in 0.8 parts by weight of sodium lauryl sulfate and 18.5 parts by weight of pentafluoroethane solvent , 0.8 parts by weight of phenylmethylsulfonyl fluoride solution, stirred and reacted at -7°C for 45 minutes;

[0032] 2) Add 3.4 parts by weight of glycerol monostearate, 6.2 parts by weight of sodium tripolyphosphate solution, 69 parts by weight of vinylidene fluoride monomer, and 1.9 parts by weight of 2-methyl-1-ethylcyclopentane, in Stir the reaction at 23°C, and terminate the reaction when the pressure drops below 0.23MPa;

[0033] 3) Filtrate, wash, and dry to obtain p...

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PUM

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Abstract

The invention discloses a porous hollow polyvinylidene fluoride fiber membrane. Polyvinylidene fluoride is taken as raw materials of the membrane and prepared through the following steps that 1, 1-2 parts by weight of carboxymethylcellulose, 2.8 parts by weight of hydrogen peroxide and 3.6 parts by weight of an inorganic alkali solution are put into a reaction kettle to be mixed evenly, 0.8 part by weight of lauryl sodium sulfate, 18.5 parts by weight of pentafluoroethane solvent and 0.8 part by weight of a phenylmethylsulfonyl fluoride solution are put into the reaction kettle, and reacting under stirring is performed for 45 minutes at minus 7 DEG C; 2, 3.4 parts by weight of glycerol monostearate, 6.2 parts by weight of a sodium tripolyphosphate solution, 69 parts by weight of vinylidene fluoride monomers and 1.9 parts by weight of 2-methyl-1-ethyl cyclopentane are put into the reaction kettle, reacting under stirring is performed at 23 DEG C, and reacting is stopped when the pressure is decreased to below 0.23 MPa; 3, filtering, washing and drying are performed, and then the powdery polyvinylidene fluoride is obtained. The porous hollow polyvinylidene fluoride fiber membrane has the corrosion resistance, heat resistance, cold resistance, oxidation resistance and weather resistance.

Description

technical field [0001] The present invention relates to a polyvinylidene fluoride porous hollow fiber 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 object of the present invention is to provide a polyvinylidene fluoride porous hollow fiber membrane, which uses polyvinylidene fluoride 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 polyvinylidene fluoride porous hollow fiber membrane, using polyvinylidene fluoride as the raw material of the membrane, and the polyvinylidene fluoride is prepared by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/02B01D69/08C08F114/22
CPCB01D71/34B01D69/02B01D69/08C08F114/22
Inventor 徐建林邹建良宗建青
Owner CHANGSHU LIYUAN MEMBRANE TECH
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