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Ionic liquid doped heterocyclic polyarylether or sulfonate thereof for high-temperature and low-humidity ionic membrane and preparation method thereof

An ionic liquid, high temperature and low humidity technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of decreased proton conductivity, high methanol permeability, high price, etc., to achieve simple preparation process, chemical The effect of stable properties and high conductivity

Inactive Publication Date: 2012-08-01
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the proton membrane used in fuel cells is the Nafion membrane (US3,282,875; US 4,330,645) produced by DuPont Company, but because it is a perfluoropolymer, it is expensive and has a high methanol permeability, and at high temperatures (above 100°C) the membrane is The proton conductivity drops sharply due to water loss, which limits its application

Method used

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  • Ionic liquid doped heterocyclic polyarylether or sulfonate thereof for high-temperature and low-humidity ionic membrane and preparation method thereof
  • Ionic liquid doped heterocyclic polyarylether or sulfonate thereof for high-temperature and low-humidity ionic membrane and preparation method thereof
  • Ionic liquid doped heterocyclic polyarylether or sulfonate thereof for high-temperature and low-humidity ionic membrane and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Weigh 5 g of sulfonated phthalazinone biphenyl polyaryl ether sulfone ketone (SPPESK120, sulfonation degree 1.2, intrinsic viscosity 2.5dL / g), and dissolve it in 50 mL DMAc. After completely dissolved, add 0.5g ionic liquid [NH(CH 2 CH 3 ) + 3 ][CH 3 COO - ], stir evenly, cast on a clean glass plate at 60℃ and dry for 8 hours. After cooling to room temperature, the film was peeled off and transferred to a vacuum oven for drying at 80° C. to obtain a yellow transparent ionic liquid-based sulfonated heterocyclic polyaryl ether composite film.

[0050] Infrared characteristic peak (FT-IR, cm-1): 3461cm -1 It is the superimposed absorption peak of O-H stretching vibration and N-H stretching vibration in the composite membrane; 3067cm -1 It is the characteristic absorption peak of C-H stretching vibration on the benzene ring; 2970cm -1 It is the characteristic absorption peak of alkane C-H stretching vibration, provided by the cation part of the ionic liquid; 1800-2500cm -1 Is t...

Embodiment 2

[0053] Weigh 5 g of sulfonated phthalazinone biphenyl polyaryl ether sulfone ketone SPPESK (degree of sulfonation 1.0) and dissolve it in 50 mL of DMAc. After completely dissolving, add 1 g of ionic liquid 1-ethyl-3 methylimidazole sulfate (EMIMES) and stir evenly. Then cast the film on a clean glass plate at 60°C and dry for 8 hours. After cooling to room temperature, the film was peeled off, and then transferred to a vacuum oven for drying at 80°C to obtain a yellow transparent ionic liquid-based sulfonated heterocyclic polyaryl ether composite film.

[0054] The proton conductivity of the composite membrane without external humidification or anhydrous conditions: 3.50mS / cm at 100°C and 3.52mS / cm at 130°C.

Embodiment 3

[0056] Weigh 5 g of sulfonated phthalazinone biphenyl polyaryl ether nitrile ketone (SPPENK, sulfonation degree 1.0, intrinsic viscosity 1.40dL / g), and dissolve it in 50mL DMSO. After it is completely dissolved, add 1g ionic liquid 1-ethyl 3-methylimidazole sulfate (EMIMES), and 0.75g acrylic acid and a small amount of benzoyl peroxide. Stir uniformly, cast into a film on a clean glass plate at 60°C and dry for 8 hours, cool to room temperature, peel off the film, and transfer to a vacuum oven to dry at 80°C to obtain a transparent ionic liquid / acrylic acid / sulfonated heterocyclic polymer Aromatic ether ternary composite membrane.

[0057] The proton conductivity of the composite membrane under no external humidification or anhydrous conditions: 5.8mS / cm at 100°C and 6.4mS / cm at 130°C.

[0058] Ionic liquid dissolution test. Take a 2×2cm ternary composite membrane, weigh it and soak it in deionized water completely, and measure its conductivity with a conductivity meter until the...

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Abstract

The invention relates to ionic liquid doped heterocyclic polyarylether or sulfonate thereof for a high-temperature and low-humidity ionic membrane and a preparation method thereof, and belongs to the technical field of organic polymer materials and membranes. The preparation method is characterized by comprising the following steps of: dissolving heterocyclic sulfonated polyarylether or heterocyclic polyarylether and ion liquid in a solvent such as DMSO, DMAc, DMF or NMP and the like with stirring to prepare 5 to 20 weight percent casting film liquid, wherein the ion liquid accounts for 1 to 50 weight percent of a polymer; and casting to form a membrane on a clean glass plate at the temperature of 60 DEG C, standing for 3 to 15 hours, cooling and performing vacuum drying to obtain a uniform and transparent membrane. Vinyl monomers or silicate ester is added into the casting film liquid, and a semi-interpenetrating polymer network is generated by an in-situ polymerization method or a sol-gel method, so that the leakage of the ion liquid can be reduced obviously. The prepared composite membrane has the advantages of wide sources of raw materials, low cost, simple and convenient preparation process, high electric conductivity, good mechanical property, stable chemical property and difficult leakage of the ion liquid, and is a substitute product of high-temperature and low-humidity proton exchange membranes or electrolyte membranes in other related industries.

Description

Technical field [0001] The invention belongs to the technical field of organic polymer materials and membranes, and relates to an ionic liquid doped heterocyclic polyarylether or its sulfonate used in a high temperature and low humidity ionic membrane and a preparation method thereof, and particularly relates to an ionic liquid doped phthalazinone biphenyl Polyarylene ether or its sulfonate is used in high temperature and low humidity proton exchange membrane or related electrolyte membrane and its preparation method. Background technique [0002] As a new generation of clean power generation system, fuel cell technology will be widely used in portable power sources, automotive power sources, power stations and other fields. Therefore, it is required not only to have high power generation efficiency, but also to miniaturize and lower the entire system; to simplify the system and improve For power generation efficiency and cost reduction, it is hoped that the operating temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/22C08L71/12C08K3/36C08K5/19C08K5/3445C08L33/00C08L25/04B01D71/52H01M8/02H01M2/16H01M8/1044H01M8/1048H01M8/1069
CPCY02E60/50
Inventor 朱秀玲陈继威
Owner DALIAN UNIV OF TECH