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A kind of anion exchange membrane loaded with cryptane unit and its preparation method

An ion-exchange membrane and cryptane technology, which is applied in the field of anion-exchange membranes containing cryptane structures and their preparation, can solve problems that do not involve the research of polyphosphazene anion-exchange membranes loaded with cryptethers, and achieve excellent alkali resistance, The effect of good stability

Active Publication Date: 2021-07-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above documents or patents do not relate to the research of loaded cryptate polyphosphazene anion exchange membranes

Method used

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  • A kind of anion exchange membrane loaded with cryptane unit and its preparation method
  • A kind of anion exchange membrane loaded with cryptane unit and its preparation method
  • A kind of anion exchange membrane loaded with cryptane unit and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Dissolve glycerol and triphenylchloromethane in 1,4-dioxane and stir for 3 days to obtain monohydroxyl-protected glycerol.

[0035] Dissolve monohydroxyl-protected glycerol in 1,4-dioxane, add NaH to it and stir for 1 h, then add ethyl bromoacetate, and stir overnight to obtain 3,6-dioxa-4-[( Triphenyl)methyl]-1,8-suberoyl chloride.

[0036] Dissolve bis-aza 18-crown-6 in acetonitrile, and add K 2 CO 3 and 3,6-dioxa-4-[(triphenyl)methyl]-1,8-suberoyl chloride, stirred overnight, with LiAlH 4 The product was reduced and deprotected with dilute hydrochloric acid to obtain hydroxymethyl-[2,2,2]-cryptate.

Embodiment 2

[0038] Take 3.06g of the hydroxycryptate structure represented by formula (3) or formula (4) and add 1.2eq of sodium metal into THF, heat to 50°C, and react for 24h. Then cooled to room temperature, and suction filtered to obtain a THF solution of cryptane sodium salt;

[0039] Add the above THF solution of cryptate sodium salt to the THF solution containing 8.3g of polydichlorophosphazene, and react at 50°C for 48h;

[0040] Add 14.95g of unsubstituted n-amyl alcohol and 1.2eq of metal sodium into THF, react at room temperature for 6h, and then filter with suction to obtain a THF solution of n-amyl alcohol sodium salt;

[0041] Add the obtained THF solution of n-amyl alcohol sodium salt into the above solution, continue to react for 24 hours, then cool to room temperature, remove the solvent, and wash the remaining viscous substance with a large amount of deionized water to obtain a light yellow elastomer;

[0042] Dissolve the resulting elastomer in 30mL THF, and dry it in ...

Embodiment 3

[0045] Take 9.18g of the hydroxycryptate structure shown in formula (3) or formula (4) and add 1.2eq of sodium metal into THF, heat to 50°C, and react for 24h. Then cooled to room temperature, and suction filtered to obtain a THF solution of cryptane sodium salt;

[0046] Add the above THF solution of cryptate sodium salt to the THF solution containing 8.3g of polydichlorophosphazene, and react at 50°C for 48h;

[0047] Add 13.38g of unsubstituted n-amyl alcohol and 1.2eq of metal sodium into THF, react at room temperature for 6h, and then filter with suction to obtain a THF solution of n-amyl alcohol sodium salt;

[0048]Add the obtained THF solution of n-amyl alcohol sodium salt into the above solution, continue to react for 24 hours, then cool to room temperature, remove the solvent, and wash the remaining viscous substance with a large amount of deionized water to obtain a light yellow elastomer;

[0049] Dissolve the resulting elastomer in 30mL THF, and dry it in a petri...

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Abstract

An anion-exchange membrane loaded with cryptane units and a preparation method thereof belong to the technical field of anion-exchange membranes for fuel cells. The anion exchange membrane is a polyphosphazene material containing cryptane units, and its structure is shown in formula (1) or formula (2). The anion-exchange membrane of the load cryptate unit is to react the [2,2,2]-cryptate with alkane hydroxyl branch and polydichlorophosphazene to obtain the polyphosphazene material loaded with cryptate unit, and finally in Formed into a film in a mold and obtained by ion exchange. The cryptate-loaded polyphosphazene anion exchange membrane provided by the present invention does not involve the quaternary phosphonium, quaternary ammonium and other groups used in most anion exchange membranes, avoids the degradation problem in a strong alkali environment, and has high ion conductivity, alkali The advantage of good stability.

Description

technical field [0001] The invention belongs to the technical field of anion exchange membranes for fuel cells. In particular, it relates to an anion exchange membrane containing a cryptin structure and a preparation method thereof. Background technique [0002] Fuel cells are widely considered to be the preferred energy conversion devices for mobile, stationary, and portable power due to their advantages of high energy efficiency, low pollution, and low noise. Compared with other types of fuel cells, the anion exchange membrane fuel cell (AEMFC) technology has many advantages, so it has become one of the research hotspots in recent years. As one of the key components of AEMFCs, anion-exchange membranes (AEMs) play an important role in separating the fuel and anion transport between the anode and cathode. For the reported anion exchange membranes with polyphenylene ether, polyarylene ether, polysulfone, polybenzimidazole, etc. as the main chain, there are defects such as h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G79/025C08J5/18C08L85/02H01M8/103H01M8/1034H01M8/1067H01M8/1072
CPCC08G79/025C08J5/18C08J2385/02H01M8/103H01M8/1034H01M8/1067H01M8/1081Y02E60/50
Inventor 汪中明陈翔朱红
Owner BEIJING UNIV OF CHEM TECH
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