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Polyvinylidene fluoride ultrafiltration membrane

A polyvinylidene fluoride, ultrafiltration membrane technology, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problem of unsatisfactory strength performance and achieve the effect of high strength

Active Publication Date: 2014-03-26
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] Currently commonly used polyvinylidene fluoride ultrafiltration membrane, the strength performance is not very ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A polyvinylidene fluoride ultrafiltration membrane is made through the following steps:

[0013] 1) Will be composed of 45g / L polyvinylidene fluoride monomer, 1g / L diacetone alcohol, 6g / L dimethyl sulfoxide, 15g / L dimethylamide, 2g / L alkyl alcohol amide polyoxyethylene ether, 5g / L dimethylacetamide, 1g / L isobutyl ketone, 1g / L n-butyl acetate, 3g / L tetramethyl urea, 8g / L trimethyl phosphate, 1g / L formamide, The casting solution prepared by 1g / L cyclohexanone, 1g / L ethyl acetoacetate, 1g / L glycol ether ester, and 3g / L polyoxyethylene oleate was passed into a vacuum fiber scraping mold to make a wet membrane;

[0014] 2) Immerse the wet film at 50°C in a solution filled with 1g / L triethyl phosphate, 15g / L methanol, 1g / L isophorone, 1g / L propylene carbonate, 20g / L ethanol, 25g / L Precipitation tank for the gel solution prepared by isopropanol, 1g / L glycol ether, and 1g / L methyl isobutyl ketone, so that it undergoes phase transition to form a film;

[0015] 3) Dry at 65°C ...

Embodiment 2

[0017] A polyvinylidene fluoride ultrafiltration membrane is made through the following steps:

[0018] 1) Will be composed of 45g / L polyvinylidene fluoride monomer, 1g / L diacetone alcohol, 6g / L dimethyl sulfoxide, 15g / L dimethylamide, 2g / L alkyl alcohol amide polyoxyethylene ether, 5g / L dimethylacetamide, 1g / L isobutyl ketone, 1g / L n-butyl acetate, 3g / L tetramethyl urea, 8g / L trimethyl phosphate, 1g / L formamide, The casting solution prepared by 1g / L cyclohexanone, 1g / L ethyl acetoacetate, 1g / L glycol ether ester, and 3g / L polyoxyethylene oleate was passed into a vacuum fiber scraping mold to make a wet membrane;

[0019] 2) Immerse the wet film at 50°C in a solution filled with 2g / L triethyl phosphate, 15g / L methanol, 1g / L isophorone, 1g / L propylene carbonate, 20g / L ethanol, 25g / L Precipitation tank for the gel solution prepared by isopropanol, 1g / L glycol ether, and 1g / L methyl isobutyl ketone, so that it undergoes phase transition to form a film;

[0020] 3) Dry at 65°C ...

Embodiment 3

[0022] A polyvinylidene fluoride ultrafiltration membrane is made through the following steps:

[0023] 1) Will be composed of 45g / L polyvinylidene fluoride monomer, 1g / L diacetone alcohol, 6g / L dimethyl sulfoxide, 15g / L dimethylamide, 2g / L alkyl alcohol amide polyoxyethylene ether, 5g / L dimethylacetamide, 1g / L isobutyl ketone, 1g / L n-butyl acetate, 3g / L tetramethyl urea, 8g / L trimethyl phosphate, 1g / L formamide, The casting solution prepared by 1g / L cyclohexanone, 1g / L ethyl acetoacetate, 1g / L glycol ether ester, and 3g / L polyoxyethylene oleate was passed into a vacuum fiber scraping mold to make a wet membrane;

[0024] 2) Immerse the wet film at 50°C in a solution filled with 1.2g / L triethyl phosphate, 15g / L methanol, 1g / L isophorone, 1g / L propylene carbonate, 20g / L ethanol, 25g / L The precipitation tank of the gel solution prepared by L isopropanol, 1g / L glycol ether, and 1g / L methyl isobutyl ketone, so that it undergoes phase transition to form a film;

[0025] 3) Dry a...

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PUM

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Abstract

The invention discloses a polyvinylidene fluoride ultrafiltration membrane which is prepared through the following steps: 1) a casting solution prepared from 45 g / L of polyvinylidene fluoride monomer, 1 g / L of acetone alcohol, 6 g / L of dimethyl sulfoxide, 15 g / L of dimethyl formamide, 2 g / L of alkylolamide polyoxyethane ether, 5 g / L of dimethyl acetamide , 1 g / L of isobutyl ketone, 1 g / L of n-butyl acetate, 3 g / L of tetramethyl urea, 8 g / L of trimethyl phosphate, 1 g / L of formamide, 1 g / L of cyclohexanone, 1 g / L of ethyl acetoacetate, 1 g / L of glycol ether ester and 3 g / L of oleic acid polyoxyethylene ester is injected into a vacuum fiber wiped-film mold to be prepared into a wet membrane; 2) the wet membrane is immersed at 50 DEG C into a precipitation tank filled with a gel solution prepared from 1-2 g / L of triethyl phosphate, 15 g / L of methyl alcohol, 1 g / L of isophorone, 1 g / L of allyl carbonate, 20 g / L of ethyl alcohol, 25 g / L of isopropanol, 1 g / L of glycol ether and 1 g / L of methyl isobutyl ketone to undergo phase transformation to be prepared into a membrane; 3) the membrane is dried at 65 DEG C to form a porous dry membrane. The polyvinylidene fluoride ultrafiltration membrane provided by the invention has a great amount of submicron uniform pores and high strength.

Description

technical field [0001] The invention relates to a polyvinylidene fluoride ultrafiltration membrane. Background technique [0002] Currently commonly used polyvinylidene fluoride ultrafiltration membranes have unsatisfactory strength properties. Contents of the invention [0003] The purpose of the present invention is to provide a polyvinylidene fluoride ultrafiltration membrane, which has a large number of uniform pores of submicron order and has high strength. [0004] In order to achieve the above object, the technical solution of the present invention is to design a polyvinylidene fluoride ultrafiltration membrane, which is made through the following steps: [0005] 1) Will be composed of 45g / L polyvinylidene fluoride monomer, 1g / L diacetone alcohol, 6g / L dimethyl sulfoxide, 15g / L dimethylamide, 2g / L alkyl alcohol amide polyoxyethylene ether, 5g / L dimethylacetamide, 1g / L isobutyl ketone, 1g / L n-butyl acetate, 3g / L tetramethyl urea, 8g / L trimethyl phosphate, 1g / L form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D67/00
Inventor 徐建林邹建良宗建青仇峰
Owner CHANGSHU 3F ZHENFU NEW MATERIALS CO LTD
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