Abstract

The present provides a method for preparing a composite material, wherein the method comprises the following steps: (1) compounding a dispersion solution of an ion exchange resin containing a free radical initiator and a high-valence metal compound, with a functional monomer-grafted porous fluoropolymer membrane with a microporous structure by performing solution pouring, tape casting, screen printing process, spraying, or impregnating process; (2) subjecting a wet membrane to heat treatment at 30˜300° C., so that the free radical initiator can initiate crosslinking reaction between the porous membrane and the resin to obtain the composite material.

IPC Classes  ?

• H01M 8/10 - Fuel cells with solid electrolytes
• B01D 69/10 - Supported membranesMembrane supports
• C08J 5/22 - Films, membranes or diaphragms
• B01D 71/82 - Macromolecular material not specifically provided for in a single one of groups characterised by the presence of specified groups, e.g. introduced by chemical after-treatment
• B01D 69/14 - Dynamic membranes
• B01D 71/32 - Polyalkenyl halides containing fluorine atoms

Abstract

A preparation method of composite materials having ion exchange function is provided. The method comprises the following steps: adding a trace of strong protonic acid and/or Lewis acid as a catalyst into the material during compounding, to allow nitrile groups of at least one nitrile group-containing ion exchange resin and nitrile groups of functional monomers grafted on the porous fluoropolymer membrane to form a triazine ring crosslinked structure.

IPC Classes  ?

• H01M 8/10 - Fuel cells with solid electrolytes
• H01M 8/1072 - Polymeric electrolyte materials characterised by the manufacturing processes by chemical reactions, e.g. insitu polymerisation or insitu crosslinking
• B01D 69/14 - Dynamic membranes
• B01D 71/32 - Polyalkenyl halides containing fluorine atoms
• C08J 5/22 - Films, membranes or diaphragms
• C08J 7/16 - Chemical modification with polymerisable compounds
• H01M 8/1023 - Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer having only carbon, e.g. polyarylenes, polystyrenes or polybutadiene-styrenes
• H01M 8/1039 - Polymeric electrolyte materials halogenated, e.g. sulfonated polyvinylidene fluorides
• H01M 8/106 - Polymeric electrolyte materials characterised by a porous support having no ion-conducting properties characterised by the chemical composition of the porous support
• H01M 8/1018 - Polymeric electrolyte materials

Abstract

Provided is a composite which is comprised of one or more ion exchange resin(s) and a porous fluorine containing polymer membrane (2), wherein the porous membrane and the resin form a carbon-chain crosslinked structure, so that the film prepared from the composite is of good airtightness and stability, as well as high ion exchange capacity and high conductivity. The preparation method of the composite, the product prepared from this composite and the application thereof are also provided.

IPC Classes  ?

• H01M 8/10 - Fuel cells with solid electrolytes
• C08J 5/22 - Films, membranes or diaphragms
• B01D 69/10 - Supported membranesMembrane supports
• B01D 69/14 - Dynamic membranes
• B01D 71/82 - Macromolecular material not specifically provided for in a single one of groups characterised by the presence of specified groups, e.g. introduced by chemical after-treatment
• B01D 71/32 - Polyalkenyl halides containing fluorine atoms

Abstract

A composite having ion exchange function, preparation method and use thereof are provided. The composite is formed by compounding ion exchange resin with fluorine-containing polymer porous membrane, wherein the nitrile groups in the ion exchange resin react with the nitrile groups grafted on the fluorine-contained polymer porous membrane to form triazine ring crosslinked structure. The composite has excellent mechanical property and gas impermeability, high ion exchange capacity and high electroconductivity.

IPC Classes  ?

• H01M 8/10 - Fuel cells with solid electrolytes

Abstract

Provided is a composite which is comprised of one or more ion exchange resin(s) and fluorine containing polymer fiber, wherein the fiber and the film-forming resin form a triazine-ring crosslinked structure, so that the film prepared from the composite is of good airtightness and stability, as well as high ion exchange capacity and high conductivity. The preparation method of the composite, the product prepared from this composite and the use thereof are also provided.

IPC Classes  ?

• H01M 8/10 - Fuel cells with solid electrolytes
• B01D 69/10 - Supported membranesMembrane supports
• B01D 69/14 - Dynamic membranes
• C08J 5/22 - Films, membranes or diaphragms
• D06M 14/28 - Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics or fibrous goods made from such materials using wave energy or particle radiation on to materials of synthetic origin of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• B01D 71/32 - Polyalkenyl halides containing fluorine atoms
• C08K 9/04 - Ingredients treated with organic substances

Abstract

The present invention provides a high exchange capacity perfluorinated resin comprising two kinds of sulfonyl fluoride-containing short pendant groups of different structures, which is prepared by copolymerizing tetrafluoroethylene, vinyl ether monomers comprising two kinds of sulfonyl fluoride-containing short pendant groups of different structures, and vinyl ether monomer comprising bromine-containing pendant group, wherein based on all monomer units in the copolymer, the mol % of tetrafluoroethylene monomer is 50-85%, the mol % of vinyl ether monomers comprising two kinds of sulfonyl fluoride-containing short pendant groups of different structures is 5-49% and the mol % of vinyl ether monomer comprising bromine-containing pendant group is 1-10%. Perfluorinated ion exchanges membrane prepared from such perfluorinated resin have resistance to various chemical media, high ion exchange capacity, high conductivity, high mechanical strength, high size stability, low membrane electrical resistance and long service life, and may be applied in fuel cells or high-temperature fuel cells.

IPC Classes  ?

• H01M 8/10 - Fuel cells with solid electrolytes
• C08F 214/26 - Tetrafluoroethene
• C25B 13/08 - DiaphragmsSpacing elements characterised by the material based on organic materials
• C08J 5/22 - Films, membranes or diaphragms

Abstract

The present invention provides a perfluorinated ion exchange resin, whose structural formula is shown in formula M. The present invention also provides preparation method of the perfluorinated ion exchange resin, comprising subjecting tetrafluoroethylene monomers and two kinds of sulfonyl fluoride-containing vinyl ether monomers in the presence of initiator to ternary copolymerization. The perfluorinated ion exchange resin provided in accordance with the present invention can fulfill the requirements of mechanical strength and ion exchange capacity at the same time and has good thermal stability.

IPC Classes  ?

• H01M 8/10 - Fuel cells with solid electrolytes
• B01J 39/20 - Macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
• B01J 47/00 - Ion-exchange processes in generalApparatus therefor
• C08F 214/26 - Tetrafluoroethene
• C25B 13/08 - DiaphragmsSpacing elements characterised by the material based on organic materials
• C08F 214/18 - Monomers containing fluorine
• C08F 216/14 - Monomers containing only one unsaturated aliphatic radical
• C08J 5/22 - Films, membranes or diaphragms

Abstract

Provided is a perfluorinated ion exchange resin, whose structural formula is shown as formula M. Also provided is preparation method of the perfluorinated ion exchange resin, including ternary copolymerization of tetrafluoroethylene monomer and two kinds of sulfonyl fluoride-containing vinyl ether monomers in the presence of initiator. The perfluorinated ion exchange resin provided can fulfill the requirements of mechanical strength and ion exchange capacity at the same time and has good thermal stability.

IPC Classes  ?

• B01J 39/00 - Cation exchangeUse of material as cation exchangersTreatment of material for improving the cation exchange properties
• C08F 2/22 - Emulsion polymerisation
• C08F 214/18 - Monomers containing fluorine
• C08F 214/26 - Tetrafluoroethene
• C08F 228/02 - Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic ring containing sulfur by a bond to sulfur

Abstract

A composite having ion exchange function, preparation method and use thereof are provided. The composite is formed by compounding ion exchange resin with fluorine-contained polymer porous membrane, wherein the nitrile groups in the ion exchange resin react with the nitrile groups grafted on the fluorine-contained polymer porous membrane to form triazine ring crosslinked structure. The composite has excellent mechanical property and gas impermeability, high ion exchange capacity and high electroconductivity.

IPC Classes  ?

• C08J 5/22 - Films, membranes or diaphragms
• C08J 9/36 - After-treatment
• C08J 9/42 - Impregnation with macromolecular compounds
• H01M 8/1044 - Mixtures of polymers, of which at least one is ionically conductive
• H01M 8/1053 - Polymer electrolyte composites, mixtures or blends consisting of layers of polymers with at least one layer being ionically conductive
• H01M 8/106 - Polymeric electrolyte materials characterised by a porous support having no ion-conducting properties characterised by the chemical composition of the porous support

Abstract

The present invention provides a high exchange capacity perfluorinated resin comprising two kinds of sulfonyl fluoride-containing short pendant groups of different structures, which is prepared by copolymerizing tetrafluoroethylene, vinyl ether monomers comprising two kinds of sulfonyl fluoride-containing short pendant groups of different structures, and vinyl ether monomer comprising bromine-containing pendant group, wherein based on all monomer units in the copolymer, the mol % of tetrafluoroethylene monomer is 50-85%, the mol % of vinyl ether monomers comprising two kinds of sulfonyl fluoride-containing short pendant groups of different structures is 5-49% and the mol % of vinyl ether monomer comprising bromine-containing pendant group is 1-10%. Perfluorinated ion exchanges membrane prepared from such perfluorinated resin have resistance to various chemical media, high ion exchange capacity, high conductivity, high mechanical strength, high size stability, low membrane electrical resistance and long service life, and may be applied in fuel cells or high-temperature fuel cells.

IPC Classes  ?

• C08F 214/26 - Tetrafluoroethene

Abstract

Provided is a composite which is comprised of one or more ion exchange resin(s) and a porous fluorine containing polymer membrane (2), wherein the porous membrane and the resin form a carbon-chain crosslinked structure, so that the film prepared from the composite is of good airtightness and stability, as well as high ion exchange capacity and high conductivity. The preparation method of the composite, the product prepared from this composite and the application thereof are also provided.

IPC Classes  ?

• C08J 5/22 - Films, membranes or diaphragms
• C08J 7/12 - Chemical modification
• C08J 9/42 - Impregnation with macromolecular compounds
• H01M 8/106 - Polymeric electrolyte materials characterised by a porous support having no ion-conducting properties characterised by the chemical composition of the porous support

Abstract

Provided is a composite which is comprised of one or more ion exchange resin(s) and fluorine containing polymer fiber, wherein the fiber and the film-forming resin form a triazine-ring crosslinked structure, so that the film prepared from the composite is of good airtightness and stability, as well as high ion exchange capacity and high conductivity. The preparation method of the composite, the product prepared from this composite and the use thereof are also provided.

IPC Classes  ?

• C08J 5/06 - Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
• C08J 5/22 - Films, membranes or diaphragms
• C08J 7/12 - Chemical modification
• H01M 8/1044 - Mixtures of polymers, of which at least one is ionically conductive