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Nafion grafted polyvinyl azole composite proton exchange membrane and preparation method thereof

A polyvinyl azole, proton exchange membrane technology, applied in the direction of final product manufacturing, sustainable manufacturing/processing, solid electrolyte fuel cells, etc., can solve problems such as the decline of proton conductivity, inhibit the permeation of methanol, optimize hydrogen bonding The effect of network and preparation conditions

Inactive Publication Date: 2015-12-23
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially under the condition of high temperature and low humidity, the pure Nafion membrane has a sharp drop in its proton conductivity due to severe dehydration.

Method used

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  • Nafion grafted polyvinyl azole composite proton exchange membrane and preparation method thereof
  • Nafion grafted polyvinyl azole composite proton exchange membrane and preparation method thereof
  • Nafion grafted polyvinyl azole composite proton exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]Add 0.5g of 1-vinylimidazole (the final product is labeled as "Nafion-PVIm") and 0.06g of bipyridine to 10mL of commercially available Nafion solution, stir well, repeat the freeze-degas-dissolve step three times to remove the Oxygen; then, add 0.1g CuBr to the above system, repeat the freezing-degassing-dissolving step three times in the same way to further remove the oxygen in the system, and react at 80°C for 24h; then, the product Nafion is obtained through dialysis and drying -PVIm; Nafion-PVIm was dissolved in DMF to form a homogeneous solution with a mass volume ratio of 5%; the solution was carefully poured into a mold and quickly placed in a 70°C oven, starting from 70°C for 2 hours and then slowly The temperature was raised to 120°C to remove the solvent; vacuum was applied, and the temperature of the vacuum oven was set at 120°C and kept for 16h; finally, the membrane was first soaked with 3wt% H 2 o 2 The solution was soaked at 70°C for 2h, followed by 1MH ...

Embodiment 2

[0028] Add 1.0 g of 1-vinylimidazole (the final product is labeled as "Nafion-2PVIm") and 0.06 g of bipyridine to 10 mL of commercially available Nafion solution, stir well, repeat the freezing-degassing-dissolving step three times to remove the Oxygen; then, add 0.1g CuBr to the above system, repeat the freezing-degassing-dissolving step three times in the same way to further remove the oxygen in the system, and react at 80°C for 24h; then, the product Nafion is obtained through dialysis and drying -2PVIm; Dissolve Nafion-2PVIm in DMF to form a homogeneous solution with a mass volume ratio of 5%; carefully pour the solution into a mold and quickly place it in a 70°C oven, start from 70°C for 2 hours and then slowly The temperature was raised to 120°C to remove the solvent; vacuum was applied, and the temperature of the vacuum oven was set at 120°C and kept for 16h; finally, the membrane was first soaked with 3wt% H 2 o 2 The solution was soaked at 70°C for 2h, followed by 1M...

Embodiment 3

[0031] Add 2.0g of 1-vinylimidazole (the final product is labeled as "Nafion-4PVIm") and 0.06g of bipyridine to 10mL of commercially available Nafion solution, stir well, repeat the freezing-degassing-dissolving step three times to remove the Oxygen; then, add 0.1g CuBr to the above system, repeat the freezing-degassing-dissolving step three times in the same way to further remove the oxygen in the system, and react at 80°C for 24h; then, obtain the product and Nafion-4PVIm; Dissolve Nafion-4PVIm in DMF to make a homogeneous solution with a mass volume ratio of 5% respectively; carefully pour the solution into a mold and quickly place it in a 70°C oven, start from 70°C for 2h Slowly raise the temperature to 120°C to remove the solvent; evacuate, set the temperature of the vacuum oven at 120°C and keep it for 16h; finally, the membrane is first soaked with 3wt% H 2 o 2 The solution was soaked at 70°C for 2h, followed by 1MH 2 SO 4 Convert the membrane to H at 80 °C for 1 h ...

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Abstract

The present invention belongs to the technical field of membranes, and particularly relates to a Nafion grafted polyvinyl azole composite proton exchange membrane and a preparation method thereof. According to the present invention, Nafion is adopted as an ATRP macromolecule initiator to initiate a vinyl azole monomer to be subjected to polymerization so as to prepare the Nafion grafted polyvinyl azole composite proton exchange membrane; the proton conductivity of the obtained Nafion grafted polyvinyl azole composite proton exchange membrane is significantly improved compared with the pure polymer proton exchange membrane, and the Nafion grafted polyvinyl azole composite proton exchange membrane has excellent selectivity; and the method has characteristics of simple operation process, mild preparation condition, low production cost, easy batch and large-scale production, good industrial production foundation and broad application prospects.

Description

technical field [0001] The invention belongs to the field of membrane technology, and in particular relates to a Nafion grafted polyvinylazole composite proton exchange membrane and a preparation method thereof. Background technique [0002] Due to its excellent characteristics such as no pollution and high efficiency, fuel cells have become one of the most competitive alternative power sources for internal combustion engines. Among them, direct methanol fuel cell, as the sixth-generation fuel cell, has attracted widespread attention. It has the additional advantages of mild operating conditions, high energy density per unit volume / mass, no need for fuel pretreatment devices, and long service life. As one of the core components of direct methanol fuel cells, the proton exchange membrane provides channels for the transport and migration of protons and / or hydrated protons; secondly, it effectively separates the fuel (i.e. methanol) from the oxidant. Therefore, the overall pe...

Claims

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Application Information

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IPC IPC(8): H01M8/10
CPCH01M8/1041H01M8/1081Y02E60/50Y02P70/50
Inventor 冯凯汤蓓蓓武培怡
Owner FUDAN UNIV
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