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Preparation method of phosphoric acid-doped polymerized ionic liquid-based composite membranes

A polymeric ionic liquid and composite membrane technology, which is applied in fuel cell parts, solid electrolyte fuel cells, fuel cells, etc., can solve the problems such as the conductivity of difficult-to-form membranes, and achieve the effect of overcoming difficult-to-form membranes

Inactive Publication Date: 2014-03-26
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the technical problems such as difficult film formation by self-polymerization of ionic liquid monomers and low film conductivity, the present invention provides a method for preparing a composite film based on polymerized ionic liquid polymer doped with phosphoric acid, to achieve the preparation of high proton conductivity, good Mechanical properties and stability of high temperature proton exchange membranes for the purpose of

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  • Preparation method of phosphoric acid-doped polymerized ionic liquid-based composite membranes
  • Preparation method of phosphoric acid-doped polymerized ionic liquid-based composite membranes
  • Preparation method of phosphoric acid-doped polymerized ionic liquid-based composite membranes

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Embodiment 1

[0040] The method steps for preparing phosphoric acid doped polymer composite membrane based on polymeric ionic liquid (P(APIM) / PA / SPEEK) are as follows:

[0041] (1) Put 2.25g of sulfonated polyetheretherketone (M=339.4g / mol, 6.63mmol) polymer with a sulfonation degree of 64.3% in a stoppered Erlenmeyer flask, add 100mL of dimethylacetamide, 70 o C magnetically stirred for 24 hours to prepare a SPEEK homogeneous solution.

[0042] (2) Under the protection of nitrogen, 1.53g of ionic liquid monomer chloride 1-acryloyloxypropyl-3-methylimidazole (M=230.5g / mol, 6.64mmol) was added to the homogeneous solution of SPEEK, and at 120 o C under reflux reaction for 2h, according to the molar ratio, the ratio of SPEEK and APIMCl is 1:1.

[0043] (3) Under nitrogen protection, lower the system temperature to 60 o When C, add 0.015g initiator azobisisobutyronitrile, magnetic stirring, at 60 o C under reaction 24h.

[0044] (4) Transfer the solution to a 100mL glass beaker at 60 ...

Embodiment 2

[0060] The method steps for preparing phosphoric acid-doped polyionic liquid-based polymer composite membrane (P(APIM) / PA / SPEEK) are as follows.

[0061] (1) Put 2.04g of sulfonated polyetheretherketone (M=339.4g / mol, 6.01mmol) polymer with a sulfonation degree of 64.3% in a stoppered Erlenmeyer flask, add 100mL of dimethylacetamide, 70 o C magnetically stirred for 24 hours to prepare a SPEEK homogeneous solution.

[0062] (2) Under the protection of nitrogen, 1.40g of ionic liquid monomer chloride 1-acryloyloxypropyl-3-methylimidazole (M=230.5g / mol, 6.07mmol) was added to the homogeneous solution of SPEEK, and at 120 o C under reflux reaction 2h. According to the molar ratio, the ratio of SPEEK and APIMCl is 1:1.

[0063] (3) Under nitrogen protection, lower the system temperature to 60 o When C, add 0.015g initiator azobisisobutyronitrile, magnetic stirring, at 60 o C under reaction for 12h.

[0064] (4) Transfer the solution to a 100mL glass beaker at 60 o The ...

Embodiment 3

[0072] The method steps for preparing phosphoric acid-doped polyionic liquid-based polymer composite membrane (P(APIM) / PA / SPEEK) are as follows.

[0073] (1) Put 2.12g of sulfonated polyetheretherketone (M=339.4g / mol, 6.25mmol) polymer with a sulfonation degree of 64.3% in a stoppered Erlenmeyer flask, add 100mL of dimethylacetamide, 70 o C magnetically stirred for 24 hours to prepare a SPEEK homogeneous solution.

[0074] (2) Under the protection of nitrogen, 1.45g of ionic liquid monomer chloride 1-acryloyloxypropyl-3-methylimidazole (M=230.5g / mol, 6.29mmol) was added to the homogeneous solution of SPEEK, and at 120 o C under reflux reaction 2h. According to the molar ratio, the ratio of SPEEK and APIMCl is 1:1.

[0075] (3) Under nitrogen protection, lower the system temperature to 60 o When C, add 0.015g initiator azobisisobutyronitrile, magnetic stirring, at 60 o C under reaction 6h.

[0076] (4) Transfer the solution to a 100mL glass beaker at 60 o The solven...

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Abstract

The invention discloses a preparation method of phosphoric acid-doped polymerized ionic liquid-based composite membranes, and belongs to the technical field of fuel cell. The preparation method comprises following steps: an ionic liquid cationic monomer containing unsaturated double bonds and polymer sulfonated polyether ether ketone are subjected to electrostatic assembly, so that in the presence of an initiator, the unsaturated double bonds in the ionic liquid cationic monomer are broken, and polymerization is realized; solvent evaporation is performed at a temperature of 60 DEG C, and membranes are obtained via tape casting at room temperature; and the membranes dried in a baking oven are hermetically immersed in a strong phosphoric acid solution with a mass concentration of 95 to 100% so as to prepare the phosphoric acid-doped polymerized ionic liquid-based composite membranes. The preparation method is capable of preparing the phosphoric acid-doped polymerized ionic liquid-based composite membranes via assembling of the polymerized ionic liquid with the polymer; the obtained phosphoric acid-doped polymerized ionic liquid-based composite membranes possess excellent mechanical properties and proton conductivity; a novel method is provided for preparing the polymerized ion liquid-based novel composite membranes; and the obtained composite membranes possess potential application values in the field of fuel cell.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a method for preparing a phosphoric acid-doped composite membrane based on a polymeric ionic liquid. Background technique [0002] The research background of preparing proton exchange membranes based on ionic liquids can be traced back to the 1990s. The C.A. Angell research group of the University of Arizona proposed in 1993: soak the polymer in liquid salt to prepare a polymer membrane electrolyte with high conductivity. The research results were published in the journal Nature, marking the ionic liquid as an ionic liquid. Conductors are beginning to be used in the development of polymer membrane electrolytes. Subsequently, in 1997, the Joan Fuller research group and the R.T.Carlin research group of North Carolina State University in the United States conducted a systematic study on the physical and chemical properties of ionic liquids, especially the electrochem...

Claims

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Application Information

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IPC IPC(8): C08J7/14C08J5/22C08L51/08C08F283/00C08F220/34H01M8/10H01M8/02H01M8/1025H01M8/1081
CPCY02E60/50
Inventor 车全通何荣桓岳杰张晨徐一鑫
Owner NORTHEASTERN UNIV
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