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

Polypyrron with sulfated side chain and preparation method of polypyrron

A technology of sulfonation and polypyridine, which is applied in electrochemical generators, fuel cell parts, fuel cells, etc., can solve problems such as difficulty in synthesizing sulfonated aromatic tetraamine monomers

Active Publication Date: 2015-01-14
UNIV OF SCI & TECH OF CHINA
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Among them, the synthesis of sulfonated aromatic tetraamine monomers is difficult, and what is more difficult is that the polycondensation reaction of aromatic tetraamine monomers and dianhydride monomers requires a very high temperature to obtain a completely cyclized and stable pyrolone structure. Cross-linking reaction is easy to occur during the chemicalization process

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
  • Polypyrron with sulfated side chain and preparation method of polypyrron
  • Polypyrron with sulfated side chain and preparation method of polypyrron
  • Polypyrron with sulfated side chain and preparation method of polypyrron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: the synthesis of dipyrrolene monomer

[0051] The dipyrrolene monomer is obtained from the condensation reaction between the dianhydride compound and the aryl diamine compound. Take the synthesis of a dipyrrone monomer as an example: 1.0 moles of 1,8-naphthalene dicarboxylic anhydride (97% purity), 2.2 moles of 3,4-diaminodiphenyl ether (97% purity) ), 0.05 moles of zinc acetate and 0.5 liters of N-methylpyrrolidone were added to a 1.0-liter reaction bottle with nitrogen gas, mechanically stirred at 180 ° C for 4 hours, cooled, poured into water, filtered, washed with water and ethanol repeatedly, vacuum After drying, the dipyrrolene monomer (yield: 95%) was obtained, which may be a mixture of cis-trans isomers but does not affect the polymerization, and can be directly used in the next step of polymerization. In the infrared spectrum at 1698cm -1 (C=O, strong) left and right and 1617cm -1 、1548cm -1 (=C=N, weaker) the characteristic absorption peak of...

Embodiment 2

[0054] Sequentially add 1.00 moles of 4,4'-diphenyl ether dicarboxylic acid, 0.99 moles of the dipyrone monomer synthesized in Example 1, and 0.01 moles of 2,2'-bis(3-sulfonated propoxy)biphenyl Add disodium and 4 liters of Eaton's reagent into a nitrogen-filled reaction bottle, stir and react at 80°C for 48 hours, pour the reaction solution into a large amount of deionized water while hot to obtain a polymer precipitate, filter and wash repeatedly with deionized water until the filtrate is Neutral, soak the obtained polymer with 0.1mol / L dilute hydrochloric acid at room temperature for 24 hours, then wash repeatedly with deionized water until the washing solution is neutral, and vacuum dry to obtain H + Polymers with side chains containing sulfonic acid groups in the form of polymers. In the infrared spectrum at 1698cm -1 (C=O, strong) left and right and 1617cm -1 、1548cm -1 (=C=N, weaker) appeared the characteristic absorption peak of pyrolone and 1646cm -1 Carbonyl abso...

Embodiment 3

[0059] Sequentially add 1.00 moles of 4,4'-diphenyl ether dicarboxylic acid, 0.50 moles of the dipyrrolene monomer synthesized in Example 1, and 0.50 moles of 2,2'-bis(3-sulfonated propoxy)biphenyl Disodium (prepared according to the method in Example 2) and 4 liters of Eaton reagent were added to a nitrogen-filled reaction bottle, stirred and reacted at 100°C for 24 hours, the reaction solution was poured into a large amount of deionized water while it was hot to obtain a polymer precipitate, filtered and used Wash with deionized water repeatedly until the filtrate is neutral, soak the obtained polymer with 0.1mol / L dilute hydrochloric acid at room temperature for 24 hours, then wash repeatedly with deionized water until the washing liquid is neutral, and vacuum dry to obtain H + Polymers with side chains containing sulfonic acid groups in the form of polymers. In the infrared spectrum at 1698cm -1 (C=O, strong) left and right and 1617cm -1 、1548cm -1 (=C=N, weaker) appear...

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

No PUM Login to View More

Abstract

The invention provides a polypyrron with a sulfated side chain. The content of sulfonic acid groups in the polypyrron can be controlled; and such polypyrron with the sulfated side chain can be used for preparing a proton exchange membrane which is high in conductivity, excellent in mechanical performance and low in cost. The invention also provides a preparation method of the polypyrron with the sulfated side chain, and also provides the proton exchange membrane.

Description

technical field [0001] The invention relates to the field of polymers and their preparation, in particular to a side chain sulfonated polypyrrole and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is regarded as a clean and efficient energy source in the 21st century due to its remarkable advantages such as high energy conversion rate, low temperature start-up, and no pollution. The proton exchange membrane is a key component of PEMFC, which mainly plays the role of conducting protons and isolating fuel and oxidant. Currently, the commonly used proton exchange membranes are Nafion series perfluorosulfonic acid membranes produced by DuPont of the United States, but perfluorosulfonic acid membranes are expensive, so the development of new low-cost proton exchange membranes has become a research hotspot. Among them, sulfonated aromatic polymers such as polyetherketone, polyethersulfone, and polyimide have attracted people...

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 Patents(China)
IPC IPC(8): C08G73/20C08G73/18C08L79/04H01M8/02H01M8/10H01M2/16H01M8/1027H01M8/103H01M8/1032H01M8/1069H01M8/1072
CPCY02E60/521Y02E60/50
Inventor 徐铜文张正辉
Owner UNIV OF SCI & TECH OF CHINA