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Alkaline polyarylether ionomer material with microphase separation structure and preparation and application thereof

A technology of microphase separation and polyarylether, which is applied in the field of basic polyarylether ionomer and its preparation, can solve the problems of decreased alcohol resistance performance, decreased long-term chemical stability in the working environment, and decreased ion conductivity, etc., to achieve Enhanced ionic conductivity, good ion-conducting performance, and high ionic conductivity

Active Publication Date: 2013-04-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The basic polyarylether ionomers that have been developed are mixed with each other due to the hydrophilic phase and the hydrophobic phase, resulting in a decrease in alcohol resistance, a decrease in the long-term chemical stability of the working environment, and a decrease in ion conductivity.

Method used

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  • Alkaline polyarylether ionomer material with microphase separation structure and preparation and application thereof
  • Alkaline polyarylether ionomer material with microphase separation structure and preparation and application thereof
  • Alkaline polyarylether ionomer material with microphase separation structure and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The present embodiment adopts following method to prepare basic polyarylether ionomer:

[0054] 1) Synthesis of hydrophilic segment: 7.5183g (21.333mmol) (ie m+1=16) of bis(4,4'-hydroxyphenyl) diphenylmethane, 5.085g (20mmol) (ie m=15) ) of dihalogen monomer a1, 4.4417g (32.142mmol) of anhydrous potassium carbonate, 30mL N,N-dimethylacetamide and 30mL toluene were added to a three-necked flask, and under nitrogen protection, the temperature of the oil bath was 140°C under reflux water for 3 hours, then warmed up to 180°C, after 12 hours of reaction, add 0.3759g (1.0666mmol) (ie 5mol% (m+1)) of bis(4,4'-hydroxyphenyl) diphenylmethane, in Continue to react at 180°C for 3 hours, then cool to room temperature, precipitate the reaction solution in 60mL of 1:1 (v / v) methanol / 3% concentrated hydrochloric acid solution, dry the crude product at 80°C in vacuum for 24 hours, and then use chloroform solvent Dissolve, pass through diatomaceous earth, precipitate in methanol, colle...

Embodiment 2

[0079] Except for the following features, other steps and testing methods of the preparation method of the present embodiment are the same as in Example 1:

[0080] When preparing the hydrophilic segment polymer, bis(4,4'-hydroxyphenyl) diphenylmethane 7.440g (21.111mmol), dihalogen monomer b1 (where X is F) 4.364g (20mmol), m= 18, 27mL of N,N-dimethylacetamide, 30mL of toluene, under the protection of nitrogen, the temperature of the oil bath is 150°C and the water is refluxed for 6 hours, then the temperature is raised to 200°C, after 12 hours of reaction, add 5mol% ( m+1) of bis(4,4'-hydroxyphenyl)diphenylmethane, continue to react at 200°C for 3 hours, then cool to room temperature, and dissolve the reaction solution in 60mL of 1:1 (v / v) methanol / 3% concentrated hydrochloric acid solution precipitation, the crude product was dried in vacuum at 80°C for 24 hours, then dissolved in chloroform solvent, passed through diatomaceous earth, precipitated in methanol, collected th...

Embodiment 3

[0105] Except for the following features, other steps and testing methods of the preparation method of the present embodiment are the same as in Example 2:

[0106] When preparing the hydrophilic segment polymer, the reactant is 7.552g (21.4285mmol) of bis(4,4'-hydroxyphenyl) diphenylmethane, 8.8288g (20mmol) of dihalogen monomer c1 (where X is Cl) , m=14, N,N-dimethylacetamide is 37mL, and toluene is 60mL.

[0107] The dihalogen monomer in this embodiment has the following structure:

[0108]

[0109] Wherein X is Cl;

[0110] The hydrophilic segment of the present embodiment has the following structure:

[0111]

[0112] has the following structure:

[0113]

[0114] When preparing hydrophobic segment polymers, the reactant dihalogen monomer c1 (where X is Cl) 8.8799g (21.4285mmol), dihydroxy aromatic monomer I5.0054g (20mmol), n=14, dimethyl sulfoxide 32mL , Toluene 60mL.

[0115] The dihydroxyaromatic monomer of the present embodiment has the following stru...

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Abstract

The invention discloses an alkaline polyarylether ionomer with microphase separation structure. A molecular structure thereof comprises a long series hydrophilic chain segment and a long series hydrophobic chain segment. The invention also discloses a preparation method for the alkaline polyarylether ionomer, which comprises the following steps of polymerizing two (4,4'-hydroxyphenyl) diphenylmethane and dihalogen monomer with an Ar1 structure for preparing the hydrophilic chain segment, polymerizing double hydroxyl aromatic monomer with an Ar2 structure and the dihalogen monomer with the Ar1 structure for preparing the hydrophobic chain segment, carrying out condensation polymerization reaction on the hydrophilic chain segment and the hydrophobic chain segment so as to obtain polyarylether, thus obtaining the polyarylether ionomer through functionalization technologies such as chloromethylation, quaternization, alkalization and the like. The invention also discloses the application of the alkaline polyarylether ionomer. The alkaline polyarylether ionomer has obvious microphase separation structure, realizes the separation of hydrophilic structure and the hydrophobic structure, and has good alcohol resistance, chemical stability, heat stability, mechanical property and electrical property when being used in anion-exchange membrane of an alkaline fuel cell.

Description

technical field [0001] The invention relates to a basic polyarylether ionomer material, in particular to a basic polyarylether ionomer with a microphase separation structure and a preparation method and application thereof. Background technique [0002] Since the 21st century, the demand for energy in human society has continued to rise. On the earth where traditional energy sources are in danger, in order to alleviate the energy crisis and maintain the sustainable development of the national economy, human beings urgently need a new energy utilization technology with high energy conversion efficiency but no pollution or low pollution. Due to its high energy conversion efficiency, environmental friendliness, high specific energy, long life, and short installation period, fuel cells can be widely used in electric vehicles, military fields, and mobile power sources, and have become a new energy technology that has attracted much attention in recent years. A type of proton exc...

Claims

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Application Information

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IPC IPC(8): C08G65/48C08G65/40H01M8/10C08J5/22H01M8/1025
CPCY02E60/523Y02E60/521Y02E60/522Y02E60/50
Inventor 李秀华余英凤刘群方
Owner SOUTH CHINA UNIV OF TECH
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