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Preparation method of konjac glucomannan/heteropoly acid composite proton conductive film

A proton-conducting membrane and mannan technology, which is applied to fuel cell components, solid electrolyte fuel cells, circuits, etc., can solve problems such as restrictions on large-scale commercial applications, reduced proton conductivity, and complicated preparation processes, and achieve Superior chemical and thermal stability, improved proton conductivity, and improved alcohol resistance

Active Publication Date: 2015-06-17
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its complex preparation process, high price, high methanol permeability, and reduced proton conductivity under high temperature and low humidity conditions greatly limit its large-scale commercial application.

Method used

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  • Preparation method of konjac glucomannan/heteropoly acid composite proton conductive film
  • Preparation method of konjac glucomannan/heteropoly acid composite proton conductive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of konjac glucomannan / heteropolyacid composite proton conductive membrane comprises the following steps:

[0026] Add 1.0 g of purified konjac glucomannan and 0.2 g of polyvinyl alcohol into 100 g of deionized water, stir at room temperature until the solid is dissolved, and then add a small amount of NaOH dropwise to adjust the pH of the solution to 10.0. Raise the temperature to 60°C, heat for 3 hours to mix the solution evenly, let it stand for 24 hours, defoam, cast on a clean glass plate to form a film, and then dry the glass plate with film at 60°C for 8 hours , peel off the film from the glass plate to obtain the konjac glucomannan-based film;

[0027] Take 5.0 g of phosphotungstic acid in 100 g of deionized water, mix, and prepare an aqueous solution of phosphotungstic acid;

[0028] Soak the prepared konjac glucomannan-based membrane in the aqueous solution of phosphotungstic acid for 24 hours, take it out and dry it at 60°C for 6 hours,...

Embodiment 2

[0032] The preparation method of konjac glucomannan / heteropolyacid composite proton conductive membrane comprises the following steps:

[0033] Add 0.8 g of purified konjac glucomannan and 0.2 g of polyvinyl alcohol into 100 g of deionized water, stir at room temperature until the solid is dissolved, and then add a small amount of NaOH dropwise to adjust the pH of the solution to 10.0. Raise the temperature to 60°C, heat for 3 hours to mix the solution evenly, let it stand for 24 hours, defoam, cast on a clean glass plate to form a film, and then dry the glass plate with film at 60°C for 8 hours , peel off the film from the glass plate to obtain the konjac glucomannan-based film;

[0034] Take 5.0 g of phosphotungstic acid in 100 g of deionized water, mix, and prepare an aqueous solution of phosphotungstic acid;

[0035] Soak the prepared konjac glucomannan-based membrane in the aqueous solution of phosphotungstic acid for 24 hours, take it out and dry it at 60°C for 6 hours,...

Embodiment 3

[0039] The preparation method of konjac glucomannan / heteropolyacid composite proton conductive membrane comprises the following steps:

[0040]Add 1.3 g of purified konjac glucomannan and 0.2 g of polyvinyl alcohol into 100 g of deionized water, stir at room temperature until the solid is dissolved, then add a small amount of NaOH dropwise to adjust the pH of the solution to 10.0. Raise the temperature to 60°C, heat for 3 hours to mix the solution evenly, let it stand for 24 hours, defoam, cast on a clean glass plate to form a film, and then dry the glass plate with film at 60°C for 8 hours , peel off the film from the glass plate to obtain the konjac glucomannan-based film;

[0041] Take 5.0 g of phosphotungstic acid in 100 g of deionized water, mix, and prepare an aqueous solution of phosphotungstic acid;

[0042] Soak the prepared konjac glucomannan-based membrane in the aqueous solution of phosphotungstic acid for 24 hours, take it out and dry it at 60°C for 6 hours, soak...

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Abstract

The invention discloses a preparation method of a konjac glucomannan / heteropoly acid composite proton conductive film. The method is characterized in that the method comprises the following steps: adding konjac glucomannan and polyvinyl alcohol into deionized water, stirring at room temperature until solids are dissolved, and adjusting the pH value of an obtained solution to 9.5-10.5; heating to 55-65DEG C, heating for 2-4h, allowing the heated solution to stand for 24h, and casting on a clean glass plate to form a film; drying the glass plate having the film at 60-80DEG C, and peeling the film to prepare a base film; immersing the base film in an aqueous solution of heteropoly acid for 8-24h, and drying at 60-80DEG C; and immersing the dried base film in deionized water, and taking out to prepare the konjac glucomannan / heteropoly acid composite proton conductive film. The konjac glucomannan / heteropoly acid composite proton conductive film prepared in the invention has a good application prospect in the fields of direct methanol fuel cells and hydrogen oxygen fuel cells.

Description

technical field [0001] The invention belongs to the preparation of fuel cell parts, and relates to a preparation method of konjac glucomannan / heteropolyacid composite proton conductive membrane. The konjac glucomannan / heteropolyacid composite proton conduction membrane prepared by the invention has good application prospects in the fields of direct methanol fuel cells, hydrogen-oxygen fuel cells, and the like. Background technique [0002] Due to its high efficiency, low pollution, high reliability and good maintainability, the fuel cell is known as the fourth generation of power generation device after hydraulic power, thermal power and nuclear power, and the polymer electrolyte fuel cell (PEMFC) is characterized by its unique Advantages such as high power generation efficiency, wide range of fuel sources, high energy density, no corrosion, low operating temperature, easy maintenance, etc., have become the most adaptable fuel cell type. [0003] Proton-conducting membrane ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/10H01M8/02C08J7/00C08J5/22C08L5/00C08K3/32C08K3/34H01M8/0228H01M8/1007H01M8/1011
CPCC08J5/2212C08J7/00C08J2305/00C08L5/00C08L2203/16H01M8/1069C08L29/04C08K2003/329C08K3/34Y02E60/50
Inventor 张亚萍李建峰李劲超王磊张帅
Owner SOUTHWEAT UNIV OF SCI & TECH
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