Hybrid proton exchange membrane based on polyacid/piperidine aryl copolymer and preparation method of hybrid proton exchange membrane

A proton exchange membrane and piperidine aryl technology, applied in the field of proton exchange membranes, can solve the problems of adverse effects on properties of electrolyte membrane fuel cells, degradation of mechanical properties, etc., achieve high proton conductivity and mechanical stability, and improve mechanical properties. , the effect of improving dimensional stability

Active Publication Date: 2021-08-13
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the development of proton exchange membranes faces the problem of balancing conductivity and mechanical properties. Existing membranes such as Nafion and polybenzimidazole have a sharp decline in mechanical properties after doping with phosphoric acid, which has an adverse effect on the properties of electrolyte membrane fuel cells.

Method used

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  • Hybrid proton exchange membrane based on polyacid/piperidine aryl copolymer and preparation method of hybrid proton exchange membrane
  • Hybrid proton exchange membrane based on polyacid/piperidine aryl copolymer and preparation method of hybrid proton exchange membrane
  • Hybrid proton exchange membrane based on polyacid/piperidine aryl copolymer and preparation method of hybrid proton exchange membrane

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preparation example Construction

[0025] The invention provides a method for preparing a hybrid proton exchange membrane based on polyacid / piperidine aryl copolymer, comprising the following steps:

[0026] The polyacid and the piperidine aryl polymer solution are mixed, poured to form a membrane, and dried to obtain a hybrid proton exchange membrane.

[0027] In the present invention, if there is no special requirement, the preparation raw materials used are commercially available products well known to those skilled in the art.

[0028] In the present invention, the polyacid is preferably a heteropolyacid, more preferably phosphotungstic acid and / or silicotungstic acid.

[0029] In the present invention, based on the total mass of the polyacid and the piperidine aryl polymer solution in the piperidine aryl polymer solution, the mass fraction of the polyacid is preferably 0.05% to 85%, more preferably 20% ~50%, more preferably 30~40%.

[0030] In the present invention, the solute of the piperidine aryl poly...

Embodiment 1

[0057]

[0058] Add 26mmol of biphenyl to a three-neck flask equipped with a stirrer and a constant pressure dropping funnel, add 8.6mL of CH 2 Cl 2 Make it dissolve, then add 3mmol N-methylpiperidone and 30mmol 1,1,1-trifluoroacetone, ice-bath, add 34mmol trifluoroacetic acid (TFA) in the constant pressure dropping funnel for 1-2 seconds Add 233mmol trifluoromethanesulfonic acid (TFSA) into the three-necked flask at a rate of 1-2 seconds / drop, and then add 233mmol trifluoromethanesulfonic acid (TFSA) into the three-necked flask at a rate of 1-2 seconds / drop, and polymerize for 6 hours in an ice bath. , pour the resulting product into 1.0mol L- 1 NaOH solution, washed with ethanol for 5-6 times, and baked in a vacuum oven at 80°C for 24 hours to obtain a piperidine aryl polymer.

[0059] Dissolve 0.11 g of the piperidine aryl polymer in 3.0 mL of N-methylpyrrolidone (NMP), and stir to dissolve it to obtain a piperidine aryl polymer solution; then add 0.05 g of phosphotung...

Embodiment 2

[0061]

[0062] Add 26mmol of biphenyl to a three-neck flask equipped with a stirrer and a constant pressure dropping funnel, add 8.6mL of CH 2 Cl 2 Make it dissolve, then add 3mmol N-methylpiperidone and 30mmol 1,1,1-trifluoroacetone, ice-bath, add 34mmol trifluoroacetic acid (TFA) in the constant pressure dropping funnel for 1-2 seconds Add 233mmol trifluoromethanesulfonic acid (TFSA) into the three-necked flask at a rate of 1-2 seconds / drop, and then add 233mmol trifluoromethanesulfonic acid (TFSA) into the three-necked flask at a rate of 1-2 seconds / drop, and polymerize for 6 hours in an ice bath. , pour the resulting product into 1.0mol L- 1 NaOH solution, washed with ethanol for 5-6 times, and baked in a vacuum oven at 80°C for 24 hours to obtain a piperidine aryl polymer.

[0063] Dissolve 0.11g of the piperidine aryl polymer in 3.0mL of NMP, and stir to dissolve it to obtain a piperidine aryl polymer solution; then add 0.03g of silicotungstic acid, stir to dissolv...

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Abstract

The invention provides a hybrid proton exchange membrane based on a polyacid/piperidine aryl copolymer and a preparation method of the hybrid proton exchange membrane, belonging to the technical field of proton exchange membranes. The preparation method of the hybrid proton exchange membrane provided by the invention comprises the following steps: mixing polyacid and a piperidine aryl polymer solution, casting the obtained mixture to form a membrane, and drying the membrane to obtain the hybrid proton exchange membrane. The result of an embodiment shows that the conductivity of the hybrid proton exchange membrane prepared by the invention at 25 DEG C is 14-28 mS.cm<-1>, and the conductivity of the hybrid proton exchange membrane at 80 DEG C is 39-102 mS.cm<-1>; and the hybrid proton exchange membrane has tensile strength at break of 58-64 MPa and elongation at break of 12-18%. Therefore, the hybrid proton exchange membrane prepared by the method has relatively high proton conductivity and mechanical stability at the same time.

Description

technical field [0001] The invention relates to the technical field of proton exchange membranes, in particular to a hybrid proton exchange membrane based on polyacid / piperidine aryl copolymer and a preparation method thereof. Background technique [0002] Polymer Electrolyte Membrane Fuel Cell (PEMFC) is considered to be the most potential energy conversion device due to its clean, efficient, high energy density and portability (J. Jagur-Grodizinski, Polymers for Advanced Technologies 18(2007) 785-799). Proton exchange membrane (PEM) is a conductor of protons and a barrier for fuel, oxidant and electrons, and plays a central role in determining the performance of electrolyte membrane fuel cells, directly affecting the output performance and service life of fuel cells (Zhang, H. ; Shen, P.K. Recent Development of Polymer Electrolyte Membranes for Fuel Cells. Chem. Rev. 2012, 112, 2780-2832). [0003] However, the development of proton exchange membranes faces the problem of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1048H01M8/1081C08G61/12
CPCH01M8/1048H01M8/1081C08G61/122C08G2261/122C08G2261/146C08G2261/1412C08G2261/312C08G2261/332C08G2261/792Y02E60/50
Inventor 李昊龙李婷婷刘炳辉赵成吉
Owner JILIN UNIV
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