Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing quaternary phosphonate anion exchange membrane through irradiation grafting

An anion exchange membrane, irradiation technology, applied in anion exchange, ion exchange, chemical instruments and methods, etc., can solve problems such as poor chemical stability, improve chemical resistance stability, promote development and practical application value, and improve resistance. The effect of chemical stability

Inactive Publication Date: 2017-08-18
ZHONGBEI UNIV
View PDF0 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the shortcomings of poor chemical stability of existing quaternary ammonium salt type anion exchange membranes, and provide a method for preparing quaternary phosphine type anion exchange membranes by irradiation grafting, so as to improve and enhance the chemical stability of anion exchange membranes

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing quaternary phosphonate anion exchange membrane through irradiation grafting
  • Method for preparing quaternary phosphonate anion exchange membrane through irradiation grafting
  • Method for preparing quaternary phosphonate anion exchange membrane through irradiation grafting

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] Preparation of polyvinylidene fluoride-based film: Weigh 1g white polyvinylidene fluoride powder, place it in a 50ml Erlenmeyer flask, slowly add 20ml DMF and stir until it dissolves evenly. Using cast film forming method, slowly spread the homogeneous solution on a glass plate, put it in a blast drying oven, and heat at 50°C overnight to make a polyvinylidene fluoride-based film with a film thickness of about 25 μm.

[0031] Cut the prepared polyvinylidene fluoride-based film into a 1cm×3cm sample, put it in a beaker, stir with acetone to wash away the surface impurities, take it out and dry it.

Embodiment 1

[0033] Weigh the pretreated polyvinylidene fluoride base film and place it in a quartz tube, add 2 mol / L methanol solution of chloromethyl styrene, and keep it sealed with nitrogen gas for 0.5 h. Place the quartz tube in a cobalt source irradiation chamber for 25 hours to obtain a grafted polyvinylidene fluoride-based film. Irradiation dose rate 20Gy·min -1 , the total dose is 30KGy.

[0034] Take out the grafted polyvinylidene fluoride base film from the quartz tube, place it in acetone solvent, extract and wash away other impurities such as homopolymer on the surface of the base film, dry it in an oven, take it out and weigh it.

[0035] The grafting rate was calculated according to the mass change of the polyvinylidene fluoride-based membrane before and after the grafting reaction.

[0036] Grafting rate=(M-M 0 ) / M 0 ×100%.

[0037] Among them, M 0 and M are the mass of polyvinylidene fluoride-based membrane before and after grafting, respectively.

[0038] The calcu...

Embodiment 2

[0042] Take the pretreated polyvinylidene fluoride-based film and place it in a quartz tube, add 2 mol / L methanol solution of chloromethyl styrene, keep it sealed with argon gas for 0.5 h. The quartz tube was placed in a cobalt source irradiation chamber for 16.7 hours to obtain a grafted polyvinylidene fluoride-based film. Irradiation dose rate 30Gy·min -1 , the total dose is 30KGy.

[0043] The grafted polyvinylidene fluoride-based membrane was extracted and washed with acetone, and then dried. According to the mass change before and after grafting, the grafting rate was calculated to be 3.24%.

[0044] Take 0.1g of grafted polyvinylidene fluoride-based film, put it in 2ml DMF and dissolve completely, add 2g of trimethoxyphenylphosphine monomer, heat up to 80°C and stir for 12h, cool to room temperature, follow the method of polyvinylidene fluoride-based film The preparation of the tape was spread on a glass plate, heated and dried to obtain Cl - Type anion exchange membr...

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
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
degree of graftingaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a quaternary phosphonate anion exchange membrane through irradiation grafting. The method comprises the steps of commonly irradiating a fluorine-containing polymer base membrane and vinylbenzyl chloride monomer solution by virtue of a cobalt radiation source by taking a fluorine-containing polymer as a base membrane and vinylbenzyl chloride as a grafting monomer through a common irradiation grafting technique so as to generate free radicals and simultaneously finish grafting reaction, dissolving the obtained grafted polymer base membrane, carrying out quaternary phosphonate reaction by virtue of the dissolved grafted polymer base membrane and a trimethoxyphenyl phosphine, carrying out curtain coating membrane paving by virtue of a reactant solution, and carrying out alkali washing, so as to obtain the quaternary phosphonate anion exchange membrane with high chemical stability. According to the quaternary phosphonate anion exchange membrane prepared by virtue of the method, the chemical stability resistance of an anion exchange membrane is improved and enhanced, and the development and practical application values of the functional membrane are promoted.

Description

technical field [0001] The invention relates to the preparation technology of polymer functional film, in particular to the preparation of an anion exchange membrane. The invention adopts the co-irradiation grafting technique to prepare the anion exchange membrane. Background technique [0002] Anion-exchange membranes are widely used in fuel cells and are ionic polymers containing functionalized groups for transporting anions. As an important part of the fuel cell, it transmits OH during the operation of the battery - , Cl - The anions are exchanged to maintain the internal balance of the battery. In order to meet the operation of the battery, the anion exchange membrane is required to meet high ion conductivity and good mechanical strength, and at the same time, it also needs high chemical stability to increase the battery life. [0003] Radiation grafting technology can combine materials with different functions and complement each other to form new membrane materials...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/18C08J7/12B01J41/14C08L27/16
CPCB01J41/14C08J7/12C08J7/18C08J2327/16
Inventor 王超夏凯解冰孔宇飞何振峰
Owner ZHONGBEI UNIV