Side-chain sulfonic acid type polyarylether, preparation method thereof and application of polyarylether in preparation of proton exchange membrane

A technology of polyarylether and chain sulfonic acid, which is applied in the field of polymer functional materials, can solve the problems of polymers losing mechanical properties, polymer swelling rate is serious, and polymer phase separation is not obvious enough, etc.

Inactive Publication Date: 2012-07-18
JILIN UNIV
View PDF3 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current studies have found that there are still some problems to be solved for this kind of material, that is, the degree of hydrophilicity and hydrophobicity in the microphase structure of this kind of material is not as good as that of perfluorosulfonic acid membrane, resulting in insufficient obvious phase separ

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
  • Side-chain sulfonic acid type polyarylether, preparation method thereof and application of polyarylether in preparation of proton exchange membrane
  • Side-chain sulfonic acid type polyarylether, preparation method thereof and application of polyarylether in preparation of proton exchange membrane
  • Side-chain sulfonic acid type polyarylether, preparation method thereof and application of polyarylether in preparation of proton exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1: Preparation of 4-(3-(4-(2,6-difluorobenzoyl)phenoxy)propoxy)benzenesulfonate sodium difluorosulfonated monomer

[0024] Put 4-(2,6'-difluorophenylcarbonyl) diphenylpropyl ether (10g) into 30mL, 95~98% concentrated sulfuric acid solution at 50℃, stir for 4h; then discharge into 100ml Use 1mol / l sodium hydroxide solution to neutralize to ph=7 in the ice water, and filter to obtain a white solid. After recrystallization, 4-(3-(4-(2,6-difluorobenzoyl)phenoxy)propoxy)benzenesulfonate sodium difluorosulfonated monomer is obtained, and the yield is 40%. FT-IR(KBr: 1 034cm -1 (-SO 3 Na), 1 660cm -1 (C=O), 1257cm -1 (C-O-C). 1 H NMR (300MHz, DMSO) δ 7.78 (d, J = 8.4 Hz, 2H), 7.65 (d, J = 7.1 Hz, 1H), 7.52 (d, J = 8.3 Hz, 2H), 7.30 (t, J = 8.1 Hz, 2H), 7.14 (d, J = 8.7 Hz, 2H), 6.88 (d, J = 8.5 Hz, 2H), 4.26 (t, J = 5.9 Hz, 2H), 4.14 (t, J = 5.7 Hz, 2H), 2.41-1.98 (m, 2H).

Example Embodiment

[0025] Example 2: Preparation of polymer PAEK-1

[0026] In a three-necked flask equipped with a stirrer, a water device and a nitrogen port, add 10mmol of 4,4'-dihydroxydiphenyl ether, 7.36mmol of 4-(3-(4-(2,6-difluoro Benzoyl) phenoxy) propoxy) benzene sulfonate, 2.64mmol of 4,4'-difluorobenzophenone, 11mmol of anhydrous potassium carbonate, 40ml of sulfolane and 8ml of toluene into the above three-necked flask In the middle, nitrogen gas was added and the temperature was raised to 120°C. Reflux with water for 2 hours, evaporate the dehydrating agent, heat up to 175℃ and react for 6 hours, then pour the reaction mixture into water to obtain the polymer, then use a pulverizer to pulverize into particles of about 10 mesh, and then filter with a Buchner funnel for more After washing with deionized water, washing with ethanol and vacuum drying at 100°C for 12 hours, the polymer PAEK-1 was obtained, with a yield of over 90%. Its sulfonation degree is 0.74, and its glass transition...

Example Embodiment

[0027] Example 3: Preparation of polymer PAEK-2

[0028] In a three-necked flask equipped with a stirrer, a water device and a nitrogen port, add 10 mmol of 4,4'-dihydroxydiphenyl ether and 8.1 mmol of 4-(3-(4-(2,6-difluoro Benzoyl)phenoxy)propoxy)benzenesulfonate, 1.9mmol of 4,4'-difluorobenzophenone, 11mmol of anhydrous potassium carbonate, 45ml of sulfolane and 9ml of toluene into the above three-necked flask In the middle, nitrogen gas was added and the temperature was raised to 120°C. Reflux with water for 2 hours, evaporate the dehydrating agent, heat up to 175℃ and react for 6 hours, then pour the reaction mixture into water to obtain the polymer, then use a pulverizer to pulverize into particles of about 10 mesh, and then filter with a Buchner funnel for more After washing with deionized water, washing with ethanol and vacuum drying at 100°C for 12 hours, the polymer PAEK-2 was obtained with a yield of over 90%. Its sulfonation degree is 0.81, and its glass transition t...

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
Glass transition temperatureaaaaaaaaaa
Glass transition temperatureaaaaaaaaaa
Glass transition temperatureaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of high polymer materials and relates to a side-chain sulfonic acid type polyarylether polymer which has high thermal stability and is used in a proton exchange membrane of a fuel cell and a preparation method thereof. The preparation method comprises the following steps: adding a diphenol monomer, a sulfonated difluoro-monomer, a difluoro-monomer and anhydrous potassium carbonate in a three-necked bottle provided with a stirrer, a water-carrying device and a nitrogen hole, adding a solvent and an azeotropic dehydrant which accounts for 20% of the solvent by volume in the three-necked bottle, injecting nitrogen, and heating to reflux the azeotropic dehydrant; and refluxing for 2-5h to dehydrate, evaporating the azeotropic dehydrant, heating to 175-190 DEG C to react for 5-8h, then pouring the reaction mixture in water to obtain a polymer, grinding the polymer to fine particles by using a grinder, filtering by using a buchner funnel, washingwith deionized water and ethanol several times, and performing vacuum drying at 100-110 DEG C for 10-15h to obtain the side-chain sulfonic acid type polyarylether polymer with high thermal stability,good solubility and film-forming property and low water absorption rate.

Description

technical field [0001] The invention belongs to the technical field of polymer functional materials, and in particular relates to a side-chain sulfonic acid type polyarylether polymer with high thermal stability used for fuel cell proton exchange membranes and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell, also known as polymer electrolyte membrane fuel cell, has the advantages of high energy conversion rate, low temperature start-up, no electrolyte leakage, no corrosion, and long life due to the use of polymer membrane as a solid electrolyte. It is recognized as the most promising power source for aerospace, military, electric vehicles and regional power stations. As the key part of the proton exchange membrane fuel cell, the proton exchange membrane plays the role of isolating the contact between the oxidant and the fuel, and as a proton carrier to complete the proton transfer. Its performance determines the performance of t...

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
IPC IPC(8): C08G65/40C08J5/22C08L71/10H01M8/02H01M2/16H01M8/1016H01M8/102H01M8/1069
CPCY02E60/12Y02E60/50
Inventor 姜振华张强刘佰军庞金辉
Owner JILIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap