Preparation method of lignosulphonate proton exchange membrane material

A technology of lignosulfonate and proton exchange membrane, which is applied in fuel cells, electrochemical generators, electrical components, etc., can solve the problems of high cost of proton exchange membranes, few sources of materials, and environmental pollution. Low cost, wide source of raw materials, and the effect of improving solubility

Active Publication Date: 2016-12-07
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a method for preparing a lignosulfonate proton exchange membrane material aiming at th...

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  • Preparation method of lignosulphonate proton exchange membrane material
  • Preparation method of lignosulphonate proton exchange membrane material
  • Preparation method of lignosulphonate proton exchange membrane material

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Experimental program
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Embodiment 1

[0037] 1) Dissolve 8 g of sodium lignosulfonate powder in 40 ml of deionized water at room temperature, stir it thoroughly, filter to remove insoluble solid impurities, and add an aqueous solution of sodium lignosulfonate to a three-necked flask.

[0038] 2) access protection N 2 , at N 2 Add 0.32 g of ammonium persulfate under the atmosphere, stir (rotating speed 120 r / min), and raise the temperature to 80°C.

[0039] 3) Keep the stirring rate constant at 120r / min, use a constant pressure dropping funnel to drop 2g of styrene and 2.4g of grafted comonomer methyl acrylate at the same speed within 20min, and react for 24h after the addition .

[0040] 4) Cool the mixed liquid obtained in step 3) to room temperature, let it stand for 1 hour, and use a rotary evaporator to evaporate water, unreacted styrene, and comonomers to obtain solid powder.

[0041] 5) The solid powder obtained in step 4) was sequentially washed with water, extracted with methanol, and vacuum-dried to re...

Embodiment 2

[0052] 1) Dissolve 8 g of sodium lignosulfonate powder in 40 ml of deionized water at room temperature, stir it thoroughly, filter to remove insoluble solid impurities, and add an aqueous solution of sodium lignosulfonate to a three-necked flask.

[0053] 2) access protection N 2 , at N 2 Add 0.32 g of ammonium persulfate under the atmosphere, stir (at a speed of 120 r / min), and raise the temperature to 80°C.

[0054] 3) Keep the stirring rate constant at 120r / min, and use a constant pressure dropping funnel to successively add 2g of styrene and 2.4g of grafted comonomer methyl acrylate at the same speed within 20min, and the addition is complete Reaction after 24h.

[0055] 4) Cool the mixed liquid obtained in step 3) to room temperature, let it stand for 1 hour, and use a rotary evaporator to evaporate water, unreacted styrene, and comonomers to obtain solid powder.

[0056] 5) The solid powder obtained in step 4) was successively washed with water, extracted with methano...

Embodiment 3

[0061] 1) Dissolve 8 g of sodium lignosulfonate powder in 40 ml of deionized water at room temperature, stir it thoroughly, filter to remove insoluble solid impurities, and add an aqueous solution of sodium lignosulfonate to a three-necked flask.

[0062] 2) access protection N 2 , at N 2 Add 0.32 g of ammonium persulfate under the atmosphere, stir (rotating at 120 r / min), and heat up to 80°C.

[0063] 3) Keep the stirring rate constant at 120r / min, and use a constant pressure dropping funnel to drop successively 2g of styrene and 2.4g of grafted comonomer methyl acrylate at the same speed within 20min. Reaction 24h.

[0064] 4) Cool the mixed liquid obtained in step 3) to room temperature, let it stand for 1 hour, and use a rotary evaporator to evaporate water, unreacted styrene, and comonomers to obtain solid powder.

[0065] 5) The solid powder obtained in step 4) was successively washed with water, extracted with methanol, and vacuum-dried to remove unreacted sodium lig...

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Abstract

The invention provides a preparation method of a lignosulphonate proton exchange membrane material. The method includes the steps of: 1) adding sodium lignosulphonate powder to deionized water, adding an initiator, and dropwise adding styrene and a graft copolymerization monomer, performing a reaction for 20-24 h, cooling and evaporating the reaction products to obtain pure grafted lignosulphonate; 2) adding the grafted modified lignosulphonate and sulfonated polyarylenesulfidesulfone polymer to an organic solvent, and performing ultrasonic dispersion and filtration to obtain a solution, and coating the surface of a glass vessel with the solution, and drying the solution at 50-120 DEG C for 12-24 h to obtain the proton exchange membrane material. The raw materials of the material are easy to obtain. The method has simple modification process and easy conditions. The proton exchange membrane material is low in cost, is stable even at 300 DEG C, is high in capacity, and reaches 0.105 S/cm in proton conductivity.

Description

technical field [0001] The invention relates to the field of fuel cell proton exchange membranes, in particular to a fuel cell proton exchange membrane containing lignosulfonate and a preparation method thereof, belonging to a new method in the field of proton exchange membranes. Background technique [0002] Energy is the lifeblood of the national economy. With the depletion of fossil fuels such as petroleum and coal, it is imminent to develop new alternative renewable energy sources. A fuel cell (Fuel Cell) is a fuel (such as H 2 , CH 3 OH) and oxidizing agents (such as O 2 ) A device that directly generates an electric current through an electrochemical reaction. Since the fuel cell operates without violent combustion and the conversion process is green and environmentally friendly, it is an effective way to solve the current energy crisis and greenhouse gas emissions, and is currently recognized as the most efficient device for converting chemical energy into electric...

Claims

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Application Information

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IPC IPC(8): C08F289/00C08F212/08C08F220/14C08L81/06C08L51/00C08J5/22H01M8/1088
CPCC08F289/00C08J5/2268C08J2381/06C08J2451/00C08L81/06C08L2203/16C08L2203/20H01M8/1088C08F212/08C08F220/14C08L51/00Y02E60/50
Inventor 丁会利蔡聿星刘闪闪侯敬贺
Owner HEBEI UNIV OF TECH
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