Three-dimensional framework and sulfonated aromatic polymer composite proton exchange membrane and preparation method thereof

A technology of aromatic polymers and proton exchange membranes, applied in electrochemical generators, fuel cells, electrical components, etc., can solve the problem of poor spinnability of proton-conducting polymers, low degree of entanglement of polymer chains, and unfavorable large-scale production To achieve the effect of improving mechanical properties and methanol penetration resistance, inhibiting swelling, improving mechanical properties and methanol resistance

Active Publication Date: 2019-05-14
HUBEI ENG UNIV
View PDF10 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the poor spinnability of proton conducting polymers is a problem that cannot be ignored
Due to the low degree of polymer chain entanglement, ionomers such as PFSA tend to be electrosprayed into beads rather than fibers, which is very unfavorable for large-scale production of electrospun ionomer nanofiber PEMs.

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
  • Three-dimensional framework and sulfonated aromatic polymer composite proton exchange membrane and preparation method thereof
  • Three-dimensional framework and sulfonated aromatic polymer composite proton exchange membrane and preparation method thereof
  • Three-dimensional framework and sulfonated aromatic polymer composite proton exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] A preparation method of a three-dimensional skeleton and a sulfonated aromatic polymer composite proton exchange membrane, which comprises the following steps:

[0033] dissolving the sulfonated aromatic polymer in a first solvent and diluting with a second solvent;

[0034] Place the polydopamine-modified three-dimensional skeleton in the casting film tank;

[0035] The sulfonated aromatic polymer solution is poured onto the polydopamine-modified three-dimensional framework and dried to obtain a three-dimensional framework / polyelectrolyte composite proton exchange membrane.

[0036] Preferably, the drying is carried out at 20-40°C, for example, at 20°C, 30°C or 40°C, so that two solvents with different boiling points are volatilized at the same time, ensuring that the sulfonated aromatic polymer is The three-dimensional skeleton is filled densely.

[0037] In the present invention, the sulfonated aromatic polymer is prepared by stirring 25g of aromatic polymer and 50...

Embodiment 1

[0049] (1) Weigh 25g of sulfonated polyaryletherketone, stir it with 500ml of sulfuric acid at 50°C for 6 hours, then slowly pour the mixture into a large amount of ice water and wash the precipitated sulfonated polyaryletherketone with deionized water repeatedly to neutrality, filtered and squeezed dry, and dried at 80°C to obtain sulfonated polyaryletherketone with a sulfonation degree of 75%;

[0050] (2) Take 0.7 g of the sulfonated polyaryletherketone obtained in step (1) and dissolve it in N,N-dimethylacetamide to form a 7wt% solution; then dilute the solution with water to a 2.5wt% solution;

[0051] (3) Prepare an aqueous solution of triisopropylethanesulfonyl with a concentration of 0.4mmol / L; then add the electrospun polyvinylidene fluoride nanofiber membrane to the aqueous solution of triisopropylethanesulfonyl, wherein the polyvinylidene fluoride The ratio of the ethylene nanofiber membrane to the aqueous solution of triisopropylethanesulfonyl is 4g / L; finally, lev...

Embodiment 2

[0058] (1) Weigh 25g of sulfonated polyaryletherketone, stir it with 500ml of sulfuric acid at 50°C for 8 hours, then slowly pour the mixture into a large amount of ice water and wash the precipitated sulfonated polyaryletherketone with deionized water repeatedly to neutrality, filtered and squeezed dry, and dried at 80°C to obtain sulfonated polyaryletherketone with a sulfonation degree of 85%;

[0059] (2) Take 0.7 g of the sulfonated aromatic polymer obtained in step (1) and dissolve it in N,N-dimethylacetamide to form a 10wt% solution; then dilute the solution with water to a 3wt% solution;

[0060] (3) Prepare an aqueous solution of triisopropylethanesulfonyl with a concentration of 0.4mmol / L; then add the electrospun polyvinylidene fluoride nanofiber membrane to the aqueous solution of triisopropylethanesulfonyl, wherein the polyvinylidene fluoride The ratio of the ethylene nanofiber membrane to the aqueous solution of triisopropylethanesulfonyl is 4g / L; finally, levodop...

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
elongation at breakaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a preparation method of a three-dimensional framework and sulfonated aromatic polymer composite proton exchangemembrane. The preparation method includes the following steps: 1) dissolving a sulfonated aromatic polymer in a first solvent, and diluting with a second solvent; and 2) pouring a sulfonated aromaticpolymer solution obtained in the step 1) onto a polydopamine modified three-dimensional framework, and drying to obtain the composite proton exchange membrane. The composite proton exchange membrane prepared by the invention has excellent methanol resistance, proton conductivity and mechanical properties. The composite membrane is low in cost and excellent in comprehensive performance, and has broad prospects in direct methanol fuel cells.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a composite proton exchange membrane with three-dimensional skeleton and sulfonated aromatic polymer and a preparation method thereof. Background technique [0002] Direct methanol fuel cells (DMFCs), as a type of polymer electrolyte membrane fuel cells (PEMFC), have attracted extensive attention from academia and industry because of their high energy conversion efficiency at low temperatures, and are compatible with hydrogen fuels. Compared with liquid methanol, it is easier to store and transport. The proton exchange membrane (PEM) is an important component of DMFC, which acts as both an electrolyte for proton transport and a barrier to isolate the anode / cathode and prevent fuel permeation. Among the various proton exchange membranes developed so far, the perfluorosulfonic acid membrane (PFSA, usually ) has become the leading product of commercial fuel cell pr...

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): H01M8/1069H01M8/1065H01M8/1041
CPCY02E60/50
Inventor 文胜刘国良龚春丽刘海汪广进张丙清胡富强钟菲汪杰郑根稳
Owner HUBEI ENG 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