WO2005058980A1 - フルオロポリマー、フルオロポリマー製造方法、電解質膜、活性物質固定体及び固体高分子電解質型燃料電池 - Google Patents
フルオロポリマー、フルオロポリマー製造方法、電解質膜、活性物質固定体及び固体高分子電解質型燃料電池 Download PDFInfo
- Publication number
- WO2005058980A1 WO2005058980A1 PCT/JP2004/018885 JP2004018885W WO2005058980A1 WO 2005058980 A1 WO2005058980 A1 WO 2005058980A1 JP 2004018885 W JP2004018885 W JP 2004018885W WO 2005058980 A1 WO2005058980 A1 WO 2005058980A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- fluoropolymer
- acid
- same
- acid salt
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/20—Manufacture of shaped structures of ion-exchange resins
- C08J5/22—Films, membranes or diaphragms
- C08J5/2206—Films, membranes or diaphragms based on organic and/or inorganic macromolecular compounds
- C08J5/2218—Synthetic macromolecular compounds
- C08J5/2231—Synthetic macromolecular compounds based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds
- C08J5/2237—Synthetic macromolecular compounds based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds containing fluorine
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/44—Preparation of metal salts or ammonium salts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
- H01B1/122—Ionic conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
- H01M8/1018—Polymeric electrolyte materials
- H01M8/102—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer
- H01M8/1023—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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
- H01M8/1018—Polymeric electrolyte materials
- H01M8/1039—Polymeric electrolyte materials halogenated, e.g. sulfonated polyvinylidene fluorides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2800/00—Copolymer characterised by the proportions of the comonomers expressed
- C08F2800/10—Copolymer characterised by the proportions of the comonomers expressed as molar percentages
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or 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 halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or 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 halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or 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 halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0082—Organic polymers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- Fluoropolymer Fluoropolymer, fluoropolymer production method, electrolyte membrane, active substance fixed body, and solid polymer electrolyte fuel cell
- the present invention relates to a fluoropolymer, a fluoropolymer production method, an electrolyte membrane, an active substance fixed body, a membrane-electrode assembly, and a solid polymer electrolyte fuel cell.
- a typical example of an unstable terminal group of a fluoropolymer is a carboxy group, and a method of stabilizing this is known to be a method of converting it into CF by a fluorinating agent.
- Patent Document 1 For example, see Patent Document 1). However, it requires fluorine gas, requires expensive corrosion-resistant equipment, and is expensive.
- Patent Document 2 See, for example, Patent Document 2. However, this document does not describe nor suggest the hygroscopicity of a polymer having a specific functional group such as a sulfonic acid group.
- Patent Document 1 Japanese Patent Publication No. 46-23245
- Patent Document 2 Japanese Patent Publication No. 37-3127
- An object of the present invention is to provide a fluoropolymer with improved stability and a simple method for obtaining the above fluoropolymer in view of the above-mentioned situation.
- the present invention 'a Furuoroporima having a salt group, and one CF H in the polymer chain end, the acid' acid salt groups are sulfonic acid groups, -so NR 3 R4R 5 R 6 , S
- OM 1 phosphate group, _PO (NR 7 R 8 R 9 R 10 ) and Z or _PO M 2 (where R 1 is Represents H or M 6, R 2 represents H, M 7, alkyl group or a sulfonyl-containing group.
- R 5 , R 6 , R 7 , R 8 , R 9 and R 10 are the same or different and represent H or an alkyl group having 1 to 4 carbon atoms; M 2 , M 6 and M 7 are the same or different and represent L-valent metals.
- the L-valent metal is a metal belonging to Group 1, 2, 4, 8, 11, 12, 12, or 13 of the long-term periodic table. ) Is a fluoropolymer.
- the present invention relates to an acid-acid salt type group and —CF CO ⁇ X (X is H
- R u , R 12 , R 13 and R 14 are the same or different and are each H or carbon
- M 4 represents an L-valent metal.
- the above L-valent metals are the same as above. ) Is subjected to a heat treatment to obtain the above—CF COOX (X
- Y 1 represents F, CI or a perfluoroalkyl group.
- N represents an integer of 0-3, and n Y 1 s may be the same or different Y 2 represents F or C 1.
- m represents an integer of 115, and m Y 2 may be the same or different.
- ONR 15 represents an R 16 R 17 R 18 M 5 represents an L-valent metal.
- the L-valent metal is the same as above.
- R 15 , R 16 , R 17 and R 18 are the same or different and represent H or an alkyl group having 14 to 14 carbon atoms. )).
- the fluoropolymer precursor is obtained by polymerizing a perhalovinyl ether derivative represented by the formula (I). If it is a group that can be converted to an acid salt type group
- the heat treatment is a method for producing a fluoropolymer, wherein the fluoropolymer precursor is heated to 120 to 400 ° C.
- the present invention is an electrolyte membrane comprising the above fluoropolymer.
- the present invention provides an active substance fixed substance comprising the above fluoropolymer and an active substance.
- the present invention is a membrane-electrode assembly membrane comprising the above-mentioned active substance fixed body.
- the present invention provides a solid polymer electrolyte fuel comprising the above-mentioned membrane-electrode assembly. Battery.
- the present invention is a solid polymer electrolyte fuel cell comprising the above-mentioned electrolyte membrane.
- the fluoropolymer of the present invention has an acid salt type group and one CF H at a polymer chain terminal.
- polymer chain terminal means the main chain terminal of the polymer.
- the fluoropolymer of the present invention has an acid salt type group and one CF H at the terminal of the main chain.
- the above fluoropolymer is contained in 1 kg of the polymer.
- the force S is preferably 0.322, and more preferably 0.5-18.
- the fluoropolymer described above may be any fluoropolymer described above.
- the fluorine ion concentration is usually 12 ppm or less, preferably 10 ppm or less.
- polymer side chain terminal when describing the side chain terminal of a polymer, it is referred to as “polymer side chain terminal”. However, when simply referred to as “polymer chain terminal”, it refers to the polymer main chain terminal.
- the fluoropolymer of the present invention is preferably a perfluoropolymer.
- the above-mentioned acid salt group can be classified into an acid group and an acid salt group.
- the acid type groups are sulfonic acid groups, SO NHR 19 or phosphoric acid group.
- R 19 represents H, an alkyl group or a sulfonyl-containing group.
- the alkyl group is not particularly limited, and includes, for example, an alkyl group having 14 carbon atoms such as a methyl group and an ethyl group.
- H in the alkyl group may be substituted by F, Cl, Br and / or I.
- the sulfonyl-containing group is a fluorine-containing alkyl group having a sulfonyl group, such as a fluorine-containing alkylsulfonyl group which may have a substituent at the terminal.
- a fluorine-containing alkyl group such as a fluorine-containing alkylsulfonyl group which may have a substituent at the terminal.
- -SO R 'Z 2 R 1 is Represents a alkylene group, and z 2 represents an organic group.
- Examples of the organic group include —SO F, and —SO (NR 19 SO R′SO) NR 19 SO _ (k is an integer of 1 or more.
- R 1 represents a fluorine-containing alkylene group. May be connected indefinitely as in f)
- R 19 and Rf 1 are the same as above. ).
- R 8 R 9 R 10 and Z or one POM 2 .
- R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 are the same or different and represent H or an alkyl group having 14 to 14 carbon atoms.
- R 2 is H, M 7 , an alkyl group or a sulfonyl-containing group
- M 2 , M 6 and M 7 are the same or different and represent L-valent metals.
- the L-valent metal is a metal belonging to Group 1, 2, 4, 8, 11, 11, 12, or 13 of the long-term periodic table.
- the acid salt groups is a sulfonic acid group, -SO NR 4 R3 ⁇ 4 6 and / or - SO M 1 (R 3
- R 4 , R 5 , R 6 and M 1 are the same as above. ) Is preferable.
- the fluoropolymer is not particularly limited, but preferably has the acid salt type group in an amount of 0.1 meq / g or more and 2.5 meq / g or less. More preferably, it has a milliequivalent / g or less.
- the above fluoropolymer is preferably obtained by subjecting a fluoropolymer precursor to a heat treatment.
- the above fluoropolymer precursor is composed of the above acid salt group and _CF R "
- R 12 , R 13 and R ′′ are the same or different and represent H or an alkyl group having 14 carbon atoms.
- M 4 represents an L-valent metal.
- the heat treatment can convert _CF COOX (X is the same as above) to _CF H.
- the method is not particularly limited as long as it is one, and examples thereof include a method described below.
- the above-mentioned fluoropolymer precursor is one of CF CO ⁇ X (X is the same as above) at the terminal of the polymer chain.
- the content is contained in lkg of polymer-The content (mmol) of CF C ⁇ X is mmol / kg
- a more preferred lower limit of the COOX content is 0.5, a still more preferred lower limit is 1, and a more preferred lower limit is 1.
- the upper limit is 18.
- CF COOX is usually converted into -CF H by the above heat treatment.
- Is a value calculated by The conversion is preferably 60% or more, more preferably 8 ° Q / o or more, and even more preferably 90 ° / o or more.
- ol in terms of mmol Zkg gives a fluoropolymer of 0.18-13.2.
- the lower limit of the CFH content at the polymer chain terminal is preferably 0.5, more preferably 0.5% or less.
- the limit is 1, and the preferred upper limit is 18.
- the fluoropolymer precursor according to the present invention has the following general formula (I)
- Y 1 represents F, CI or a perfluoroalkyl group.
- N represents an integer of 0-3, and n Y 1 s may be the same or different Y 2 represents F or C 1.
- m represents an integer of 115, and m Y 2 may be the same or different.
- ONR 15 represents an R 16 R 17 R 18 M 5 represents an L-valent metal.
- R 15 , R 16 , R 17 and R 18 are the same or different and represent H or an alkyl group having 14 to 14 carbon atoms. ) Is preferably obtained by polymerizing the perhalovinyl ether derivative represented by the formula (1).
- the fluoropolymer precursor is obtained by adding the Z-force of SO Z in the general formula (I) to SF
- the polymer having a group other than the above-mentioned acid acrylate type group and having a group which can be converted to the above-mentioned acid acrylate type group is subjected to hydrolysis treatment. Go to have an acid salt type group It may be converted to a polymer.
- the fluoropolymer precursor may be obtained by subjecting a polymer having a group corresponding to the acid salt type group (hereinafter referred to as “first group”) to hydrolysis and / or acid treatment.
- the polymer may be converted into a polymer having a group corresponding to the acid salt type group different from the first group (hereinafter, “second group”).
- the conversion from the first group to the second group includes the exchange of L-valent metal species constituting the acid salt group, the conversion of the acid group to the acid salt group, and the conversion of the acid salt group. To an acid group.
- — SO Z in the above general formula (I) is the above-mentioned acid salt type.
- the Z force of -SOZ in the above general formula (I) is SF, Cl, Br or
- a hydrolysis treatment or the like for converting the above S ⁇ Z into an acid salt type group may be mentioned.
- NR 15 R 16 R 17 R 18 may be replaced by another type.
- Z OM 5 of S ⁇ Z in the above general formula (I) may be used.
- —SO Z is the same as above, and NHI ⁇ R ⁇ R 1 and R 2 are the same as those described above.
- the process for producing a fluoropolymer of the present invention comprises the steps of:
- OX is, H, R U, R 12 , R 13 and R 14 are the same young
- M 4 represents an L-valent metal.
- the L-valent metal is the same as above.
- X is the same as above
- _CF H hereinafter referred to as “terminal group”.
- CF H is a group that is much more stable than _CF COOX (X is the same as above).
- the fluoropolymer production method of the present invention stabilizes the polymer chain ends by heat treatment, it does not require the fluorination equipment required in the conventional fluorination treatment of polymer chain ends. It is excellent in that there are no side reactions that can occur in the fluorination treatment.
- the “fluorination treatment” is a treatment performed by supplying a fluorine source from outside the system in order to fluorinate a thermally unstable group such as COOX.
- the fluoropolymer precursor is obtained by polymerizing the perhalovinyl ether derivative of the above general formula (I).
- Y 2 is F
- n is 0 or 1
- m is preferably 2 or 3
- n is 0, and m is 2. Is more preferred.
- the fluoropolymer precursor is preferably a binary or more copolymer obtained by polymerizing the perhalovinyl ether derivative and a monomer copolymerizable with the perhalovinyl ether derivative. .
- Examples of the monomer copolymerizable with the perhalovinyl ether derivative include an ethylenic fluoromonomer.
- the ethylenic fluoromonomer is not particularly limited as long as it has a butyl group and all hydrogen atoms bonded to carbon atoms are replaced by fluorine atoms. Things.
- Examples of the ethylenic fluoromonomer include the following general formula
- R 2 represents a fluorine atom, a chlorine atom, one R 3 or —OR 3
- R 3 has an ether oxygen having 19 to 19 ffff carbon atoms, and may have a straight chain.
- Y 3 represents H or a fluorine atom
- Y 4 represents H, a fluorine atom, a chlorine atom, R 4 or —f
- R 4 is a linear or branched ff which may have an ether oxygen having 11 to 19 carbon atoms.
- the fluorovinyl ether is preferably a perfluoroalkyl group in which R 5 has a carbon number of 113.
- One or more kinds of the thylene fluoromonomers can be used.
- the fluoropolymer precursor may further contain other functions in order to impart various functions to the fluoropolymer, without impairing the basic performance of the fluoropolymer. It may be obtained by polymerizing a polymerizable monomer.
- the above-mentioned other copolymerizable monomers are not particularly limited, and may be copolymerized according to purposes such as control of polymerization rate, control of polymer composition, control of mechanical properties such as elastic modulus, introduction of crosslinking sites, and the like.
- Suitable monomers include those having two or more unsaturated bonds, such as perfluorodivinyl ether, and monomers containing a cyano group.
- the fluoropolymer precursor has a perhalovinyl ether derivative unit content of: Les Shi preferred to be a 5-40 mol 0/0,.
- Les Shi preferred to be a 5-40 mol 0/0, there is a case where the performance of the electrolyte Furuoroporima one obtained decreases, and when it exceeds 40 mol%, the insufficient mechanical strength of the film-shaped molded product of the resulting full Oroporima is May be.
- a more preferred lower limit is 8 mol%, and a more preferred upper limit is 35 mol%.
- the content of the perhalovinyl ether derivative unit on the surface of the fluoropolymer particles needs to be within the above range.
- the "perhalovinyl ether derivative unit” means a part of the molecular structure of the fluoropolymer precursor, which is derived from the perhalovinyl ether derivative.
- the “content of the perhalovinyl ether derivative unit” is derived from the perhalovinyl ether derivative unit in the mole number of the monomer derived from all the monomer units in the molecule of the fluoropolymer precursor. It is the ratio of the number of moles of the perhalovinyl ether derivative.
- the “all monomer units” are all of the moieties derived from monomers in the molecular structure of the fluoropolymer precursor.
- the above “monomer from which all monomer units are derived” is, therefore, the total amount of the monomers that have formed the above fluoropolymer precursor.
- the content of the perhalovinyl ether derivative unit is a value obtained by using infrared absorption spectrum analysis [IR] or melt NMR at 300 ° C.
- the fluoropolymer production method of the present invention can be suitably applied.
- the fluoropolymer precursor may be any one of a powder, a disposable material, a solution, and a film-like molded product.
- the fluoropolymer production method of the present invention preferably comprises subjecting the fluoropolymer precursor constituting the powder, dispersion, solution, or film-like molded product to a heat treatment, and It converts CF C ⁇ OX (X is the same as above) to one CF H.
- the treatment does not change the above-mentioned acid salt type group, nor does it change the form of the powder, dispersion, solution or film-like molded product.
- the powder composed of the fluoropolymer precursor is a powder composed of a polymer obtained by polymerizing the above-mentioned perhalovinyl ether derivative, and the polymer is a powder of —S ⁇ Z in the general formula (I).
- Z force The above acid, as in SF, Cl, Br or I.
- R 5 and R 6 are as defined above.
- examples of the powder include those obtained from a liquid after polymerization through appropriate coagulation operation and purification operation, and are solution polymerization. In such a case, for example, those obtained by removing the solvent used as a reaction medium by an ordinary method and performing an appropriate purification operation, and the like can be mentioned.
- the dispurgeon comprising the fluoropolymer precursor is an emulsion polymerization liquid of a polymer obtained by polymerizing the above-mentioned perhalovinyl ether derivative, or a dispersion obtained by dispersing the above-mentioned powder in an appropriate dispersion medium.
- the polymer is the Z-force of -SO Z in the general formula (I), SF, Cl, Br or I, the acid.
- R 6 is the same as above. ), Etc. to form a fluoropolymer precursor by converting into the above-mentioned acid-acid salt type group.
- the solution comprising the fluoropolymer precursor is obtained by dissolving the above-mentioned powder in an appropriate liquid medium by the method disclosed in JP-T-2001-504872, US Pat. No. 4,433,082, and the like. is there.
- the liquid medium include a mixed solvent of water and Z-isopropyl alcohol, and the above solution is obtained by heating the mixed solvent to 230 to 250 ° C.
- the solution contains rod-shaped fine resin particles of a fluoropolymer precursor having an aspect ratio of about 5, whereas the fluoropolymer precursor particles contained in the dispurgeon are spherical particles having an average particle diameter of several tens of nanometers. It is also distinguished in that it contains
- the film-shaped molded product comprising the fluoropolymer precursor is subjected to melt molding using the above-mentioned powder or pressure-molded by using, for example, a method described in JP-A-58-37031.
- a film formed by the above method, or a film formed by casting using the above-described disposable solution or solution and casting the film may be used.
- the above-mentioned film-shaped molded product may be a material other than the above-mentioned acid-acid salt type group as in the case where the Z force of S ⁇ Z in the general formula (I) is SF, Cl, Br or I.
- the fluoropolymer precursor obtained above is subjected to a hydrolysis treatment and an acid treatment, and further to a treatment for removing low-molecular substances (hereinafter, sometimes referred to as "low-molecular substance removal treatment"). May be obtained.
- the low-molecular substance include, for example, monomers remaining in the above-mentioned emulsion polymerization, residues of a polymerization initiator, unnecessary low-molecular-weight polymers, and substances generated by hydrolyzing a fluoropolymer precursor. When the emulsifier residue used for the emulsion polymerization is present, these can also be removed.
- the low molecular substance removal treatment is not particularly limited, and includes, for example, a centrifugal separation method, an electrophoresis method, an ultrafiltration method, and the like. preferable.
- the ultrafiltration method is not particularly limited as long as it is a method for removing low-molecular substances using an ultrafiltration device having an ultrafiltration membrane. And the like.
- As the ultrafiltration device having the ultrafiltration membrane a commercially available ultrafiltration device can be suitably used. For research use, for example, Centriprep (trade name, manufactured by Amicon), Militan (trade name, manufactured by Millipore) ), Pericon (trade name, manufactured by Millipore), etc. .
- the fluoropolymer precursor obtained by the ultrafiltration step can be concentrated.
- the low molecular substance removal treatment may be performed after the hydrolysis treatment, or may be performed before the acid treatment when an acid treatment is further performed after the hydrolysis treatment.
- the source of proton [H + ] added to -CF- is not particularly limited.
- the heat treatment is usually performed in the presence of H 2 O.
- the heating is usually performed in the presence of H 2 O.
- the heating is usually performed in the presence of H 2 O.
- H ⁇ which is normally present in the sense of nature, means H 2 O at the molecular level.
- H ⁇ usually present in the heat treatment is such that the fluoropolymer precursor is disperse.
- the aqueous dispersion can be supplied from the aqueous dispersion medium in the aqueous dispersion.
- the H ⁇ is a powder or fluoropolymer precursor.
- the acid-acid salt type group of the fluoropolymer precursor can be supplied only by the absorbed moisture, so that it is not necessary to add water from outside the system.
- the time required for the heat treatment depends on the type of the acid-acid salt type group of the fluoropolymer precursor, whether the fluoropolymer precursor is powder, dispersion, a solution or a film-shaped product, and whether the fluoropolymer precursor is It can be appropriately selected according to the affinity of the solvent, the temperature at which the heat treatment is performed, and the like.
- the fluoropolymer precursor preferably forms a film-like molded product. When the fluoropolymer precursor constitutes a film-shaped molded product, the film-shaped molded product can be directly used after the heat treatment in the case of application in a film-shaped application.
- the above heat treatment can convert -CF CCFOX (X is the same as above) to one CF H.
- the fluoropolymer production method of the present invention it is preferable to heat the above fluoropolymer precursor to 120 to 400 ° C. If the temperature is lower than 120 ° C, the decarboxylation reaction may be difficult to proceed, and if it is higher than 400 ° C, the polymer main chain itself may be decomposed.
- the preferable upper limit of the temperature of the heat treatment is 350 ° C, and the more preferable upper limit is 300 ° C.
- the heat treatment is performed by subjecting the fluoropolymer precursor to water or an organic solvent having an affinity for water.
- the force which can be achieved by heating to 120-250 ° C is more preferably 120-220 ° C, and even more preferably 120-200 ° C.
- the ⁇ water '' present in the heat treatment is, as described above, macroscopic water that is not at the molecular level of HO, and for example, the above-described acid-acid-type group absorbs moisture.
- the decarboxylation temperature can be lowered.
- the fluoropolymer precursor forms a film-shaped molded product, it may be deformed at a high temperature.
- a high-boiling organic solvent such as a phosphoric acid ester may coexist to lower the processing temperature and maintain dimensional stability. I like it.
- the decarboxylation reaction proceeds sufficiently quickly, so even if the heat treatment is performed at a temperature equal to or higher than the boiling point of the organic solvent, before the organic solvent evaporates. Can be subjected to end group conversion.
- the fluoropolymer having one SOF as a side chain terminal group is heated to 200 ° C or more.
- the organic solvent having an affinity for water is preferably a polar solvent, and more preferably has a boiling point of more than 100 ° C and not more than 300 ° C.
- the organic solvent having an affinity for water is not particularly limited as long as it has polarity and has a boiling point of more than 100 ° C and 300 ° C or less.
- the phosphate ester is not particularly limited, and examples thereof include a phosphate triester of phosphoric acid and an alcohol having 115 carbon atoms.
- examples of the phosphate triester include trimester phosphate. Chill, triethyl phosphate and the like.
- the cyclic amide or cyclic amide derivative is not particularly limited, and examples thereof include pyrrolidone in which a hydrogen atom may be substituted with an alkyl group having 115 carbon atoms.
- examples of such a pyridone include 2-pyridone. Methylpyrrolidone and the like.
- the imidazolidine or imidazolidine derivative is not particularly limited, and examples thereof include a hydrogen atom substituted with an alkyl group having 115 carbon atoms, and imidazolidine.
- examples of such imidazolidine include: 3, 4-dimethyl imidazolidine and the like.
- the monohydroxy ether of the ethylene oxide oligomer is not particularly limited. A molecule formed by an ether bond of 2 to 10 ethylene oxide adducts and one alkyl group having 11 to 10 carbon atoms may be used. preferable.
- the number of additions of ethylene oxide is an average value of the ethylene oxide oligomer as an aggregate of monohydroxy ether molecules.
- Examples of the monohydroxy ether of the ethylene oxide oligomer include a monoalkyl ether of ethylene glycol and a monoalkyl ether of triethylene glycol. Examples of such a monohydroxy ether include a monomethyl ether of diethylene glycol and a monoalkyl ether of triethylene glycol. Monomethyl ether and the like.
- a film-like molded article, preferably an electrolyte membrane, comprising the above-mentioned fluoropolymer of the present invention is also one of the present invention.
- the electrolyte membrane may have a thickness of, for example, 11 ⁇ 200 ⁇ m.
- the active substance fixed body of the present invention is composed of the fluoropolymer and the active substance.
- the active substance is not particularly limited as long as it has an activity in the active substance fixed body. It is appropriately selected according to the purpose of the substance fixed body. In some cases, a catalyst can be suitably used.
- the catalyst is not particularly limited as long as it is one usually used as an electrode catalyst.
- the complex include an organometallic complex in which at least one of its central metals is platinum or ruthenium.
- the metal containing platinum, ruthenium, etc. may be a metal containing ruthenium, for example, ruthenium alone, but a metal containing platinum is preferred.
- a simple substance of platinum platinum black
- a platinum-norethenium alloy The above catalyst is usually used by being supported on a carrier such as silica, alumina and carbon.
- the membrane electrode assembly [MEA] of the present invention has the above-mentioned active material fixed body.
- the membrane / electrode assembly may contain other substances other than the active substance fixed body as long as the properties of the active substance fixed body are not hindered.
- the solid polymer electrolyte fuel cell of the present invention has the above-mentioned membrane-electrode assembly.
- the solid polymer electrolyte fuel cell is not particularly limited as long as it has the membrane-electrode assembly.
- the solid polymer electrolyte fuel cell of the present invention has the above-mentioned electrolyte membrane.
- the above-mentioned solid polymer electrolyte fuel cell is not particularly limited as long as it has the above-mentioned electrolyte membrane, and may usually contain components such as electrodes constituting the solid polymer electrolyte fuel cell.
- the active substance fixed body, the electrolyte membrane, or the solid polymer electrolyte fuel cell described above uses a fluoropolymer having an acid group, which is obtained by using a fluoropolymer having an acid-acid salt group. It is preferably obtained from the above.
- the fluoropolymer production method of the present invention has the above-described configuration, a fluoropolymer having good stability and improved durability can be obtained by a simple method.
- TFE gas was introduced and the pressure was increased to 0.7 MPa with a gauge pressure.
- an aqueous solution of 0.5 g of ammonium persulfate [APS] dissolved in 60 g of pure water was injected to start the polymerization.
- the TFE was continuously supplied.
- the pressure of the clave was kept at 0.7 MPa.
- the autoclave pressure was released and the polymerization was stopped. Thereafter, the mixture was cooled to room temperature to obtain 2450 g of a slightly cloudy aqueous dispersion containing about 33% by mass of the fluoropolymer precursor. A portion of the aqueous dispersion was coagulated with nitric acid, washed with water, dried and measured by melt NMR. The content of the fluorovinyl ether derivative unit in the fluoropolymer precursor was found to be 19 mol%. Was.
- the obtained fluoropolymer powder was immersed in a 20% by mass aqueous solution of potassium hydroxide and maintained at 95 ° C. for 24 hours to hydrolyze mono-SOF. This powder is separated by filtration and washed thoroughly with pure water.
- Heat treatment was performed in a furnace at 300 ° C for 1 hour.
- the powder before and after the treatment was pelletized using KBr and subjected to IR measurement.
- the powder before treatment 1776Cm- 1 but near and 1807cm peak derived from a vicinity of one 1 Karubokishinore group was observed, the powder after the heat treatment, the peak was observed.
- the above-mentioned aqueous polymer powder (dried, hydrolyzed, and hydrolyzed) was melted at a temperature of 270 ° C.
- the film was formed into a film having a thickness of 50 ⁇ m.
- the membrane was immersed in a mixed solution of trimethyl phosphate and water at a mass ratio of 1 to 1 for 5 minutes, placed in a hot air circulating dryer at 190 ° C, and subjected to heat treatment for 1 hour.
- a mixed solution of trimethyl phosphate and water at a mass ratio of 1 to 1 for 5 minutes, placed in a hot air circulating dryer at 190 ° C, and subjected to heat treatment for 1 hour.
- the membrane obtained in (4) was subjected to a stability test using Fenton's reagent, and as a result, the fluorine ion concentration was 6 ppm.
- Table 1 shows the relationship between the heat treatment temperature and the conversion ratio of the polymer chain terminal.
- the polymer contained 35% by mass of the polymer.
- the membrane obtained in (3) above was subjected to a stability test using Fenton's reagent, and as a result, the fluorine ion concentration was 22 ppm.
- the fluoropolymer of the present invention can be particularly suitably used for applications requiring stability, such as a solid polymer electrolyte fuel cell.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electrochemistry (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Fuel Cell (AREA)
- Conductive Materials (AREA)
- Inert Electrodes (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005516355A JP4569472B2 (ja) | 2003-12-17 | 2004-12-17 | フルオロポリマー、フルオロポリマー製造方法、電解質膜、活性物質固定体及び固体高分子電解質型燃料電池 |
US10/583,081 US20070142580A1 (en) | 2003-12-17 | 2004-12-17 | Fluoropolymer, process for producing fluoropolymer, electrolyte film, object having immobilized active substance, and solid polymer electrolyte type fuel cell |
EP04807243.3A EP1702933B1 (en) | 2003-12-17 | 2004-12-17 | Fluoropolymer, process for producing fluoropolymer, electrolyte film, object having immobilized active substance, and solid polymer electrolyte type fuel cell |
CA2549676A CA2549676C (en) | 2003-12-17 | 2004-12-17 | Fluoropolymer, process for producing fluoropolymer, electrolyte film, object having immobilized active substance, and solid polymer electrolyte type fuel cell |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-420232 | 2003-12-17 | ||
JP2003420232 | 2003-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005058980A1 true WO2005058980A1 (ja) | 2005-06-30 |
Family
ID=34697244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/018885 WO2005058980A1 (ja) | 2003-12-17 | 2004-12-17 | フルオロポリマー、フルオロポリマー製造方法、電解質膜、活性物質固定体及び固体高分子電解質型燃料電池 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070142580A1 (ja) |
EP (1) | EP1702933B1 (ja) |
JP (1) | JP4569472B2 (ja) |
CA (1) | CA2549676C (ja) |
WO (1) | WO2005058980A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018530634A (ja) * | 2015-08-05 | 2018-10-18 | ゼロックス コーポレイションXerox Corporation | PVDF−TrFE共重合体の末端基の交換法、強誘電特性の改善されたPVDF−TrFE共重合体、および、PVDF−TrFE共重合体を含む電子デバイスの製造法 |
WO2019240278A1 (ja) | 2018-06-15 | 2019-12-19 | Agc株式会社 | イオン交換膜および乾燥イオン交換膜の製造方法 |
US10586994B2 (en) | 2013-07-02 | 2020-03-10 | Asahi Kasei Kabushiki Kaisha | Electrolyte solution and method for producing same, continuously dissolving facility, electrolyte membrane, electrode catalyst layer, membrane electrode assembly and fuel cell |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5376485B2 (ja) * | 2007-02-21 | 2013-12-25 | 独立行政法人日本原子力研究開発機構 | アルキルグラフト鎖からなる高分子電解質膜、及び、その製造方法 |
JP6819595B2 (ja) | 2015-08-31 | 2021-01-27 | Agc株式会社 | 液状組成物の製造方法、触媒層形成用塗工液の製造方法および膜電極接合体の製造方法 |
WO2017083241A1 (en) * | 2015-11-10 | 2017-05-18 | 3M Innovative Properties Company | Processing aid composition comprising a sulfonate-containing fluorinated polymer |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3085083A (en) * | 1959-05-05 | 1963-04-09 | Du Pont | Stabilized tetrafluoroethylene-fluoro-olefin copolymers having-cf2h end groups |
JPS4623245B1 (ja) * | 1968-01-18 | 1971-07-02 | ||
JPS57115425A (en) * | 1980-12-19 | 1982-07-17 | Asahi Glass Co Ltd | Manufacture of fluoroplastic ion exchange membrane |
JP2004075979A (ja) * | 2002-06-17 | 2004-03-11 | Daikin Ind Ltd | 含フッ素ポリマー分散体及び含フッ素ポリマー分散体製造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3085803A (en) * | 1959-04-14 | 1963-04-16 | Casey S Krzes | Battle game |
US3282875A (en) * | 1964-07-22 | 1966-11-01 | Du Pont | Fluorocarbon vinyl ether polymers |
WO1998016581A1 (en) * | 1996-10-15 | 1998-04-23 | E.I. Du Pont De Nemours And Company | Compositions containing particles of highly fluorinated ion exchange polymer |
ITMI20010383A1 (it) * | 2001-02-26 | 2002-08-26 | Ausimont Spa | Membrane idrofiliche porose |
JP2003346867A (ja) * | 2002-05-27 | 2003-12-05 | Seiko Epson Corp | 燃料電池及びその製造方法 |
KR100608199B1 (ko) * | 2002-06-17 | 2006-08-08 | 다이킨 고교 가부시키가이샤 | 불소 함유 중합체 분산체 및 불소 함유 중합체 분산체의제조 방법 |
JP4871591B2 (ja) * | 2003-05-13 | 2012-02-08 | 旭硝子株式会社 | 固体高分子型燃料電池用電解質ポリマー、その製造方法及び膜・電極接合体 |
EP2452955B1 (en) * | 2003-09-10 | 2016-12-14 | Asahi Kasei Kabushiki Kaisha | Stabilized fluoropolymer and method for producing same |
-
2004
- 2004-12-17 CA CA2549676A patent/CA2549676C/en active Active
- 2004-12-17 WO PCT/JP2004/018885 patent/WO2005058980A1/ja active Application Filing
- 2004-12-17 US US10/583,081 patent/US20070142580A1/en not_active Abandoned
- 2004-12-17 JP JP2005516355A patent/JP4569472B2/ja not_active Expired - Fee Related
- 2004-12-17 EP EP04807243.3A patent/EP1702933B1/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3085083A (en) * | 1959-05-05 | 1963-04-09 | Du Pont | Stabilized tetrafluoroethylene-fluoro-olefin copolymers having-cf2h end groups |
JPS4623245B1 (ja) * | 1968-01-18 | 1971-07-02 | ||
JPS57115425A (en) * | 1980-12-19 | 1982-07-17 | Asahi Glass Co Ltd | Manufacture of fluoroplastic ion exchange membrane |
JP2004075979A (ja) * | 2002-06-17 | 2004-03-11 | Daikin Ind Ltd | 含フッ素ポリマー分散体及び含フッ素ポリマー分散体製造方法 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10586994B2 (en) | 2013-07-02 | 2020-03-10 | Asahi Kasei Kabushiki Kaisha | Electrolyte solution and method for producing same, continuously dissolving facility, electrolyte membrane, electrode catalyst layer, membrane electrode assembly and fuel cell |
US11374247B2 (en) | 2013-07-02 | 2022-06-28 | Asahi Kasei Kabushiki Kaisha | Electrolyte solution and method for producing same, continuously dissolving facility, electrolyte membrane, electrode catalyst layer, membrane electrode assembly and fuel cell |
JP2018530634A (ja) * | 2015-08-05 | 2018-10-18 | ゼロックス コーポレイションXerox Corporation | PVDF−TrFE共重合体の末端基の交換法、強誘電特性の改善されたPVDF−TrFE共重合体、および、PVDF−TrFE共重合体を含む電子デバイスの製造法 |
WO2019240278A1 (ja) | 2018-06-15 | 2019-12-19 | Agc株式会社 | イオン交換膜および乾燥イオン交換膜の製造方法 |
US11958950B2 (en) | 2018-06-15 | 2024-04-16 | AGC Inc. | Ion exchange membrane and method for producing dry ion exchange membrane |
Also Published As
Publication number | Publication date |
---|---|
EP1702933B1 (en) | 2019-02-20 |
CA2549676C (en) | 2010-03-30 |
CA2549676A1 (en) | 2005-06-30 |
JP4569472B2 (ja) | 2010-10-27 |
US20070142580A1 (en) | 2007-06-21 |
EP1702933A1 (en) | 2006-09-20 |
JPWO2005058980A1 (ja) | 2007-07-12 |
EP1702933A4 (en) | 2007-03-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4123272B2 (ja) | 含フッ素ポリマー分散体及び含フッ素ポリマー分散体製造方法 | |
EP2076553B1 (en) | Process for stabilizing fluoropolymer having ion exchange groups | |
US8658746B2 (en) | Electrolyte polymer for polymer electrolyte fuel cells, process for its production and membrane-electrode assembly | |
KR101560111B1 (ko) | 레독스 플로우 이차 전지 및 레독스 플로우 이차 전지용 전해질막 | |
EP2588507B1 (en) | Process for the treatment of sulfonyl fluoride polymers | |
EP1602687B1 (en) | Liquid fluoropolymer composition, process for producing organosol, film, and fuel cell | |
WO2005058980A1 (ja) | フルオロポリマー、フルオロポリマー製造方法、電解質膜、活性物質固定体及び固体高分子電解質型燃料電池 | |
EP2853548B1 (en) | Method for producing aqueous fluorine-containing polymer dispersing element, and purified aqueous fluorine-containing polymer dispersing element | |
CN112955494A (zh) | 可分散离聚物粉末和其制作方法 | |
JP5409803B2 (ja) | フルオロイオノマー組成物の精製 | |
JP2006131846A (ja) | 電解質材料の製造方法及び固体高分子型燃料電池用膜・電極接合体の製造方法 | |
JP3920779B2 (ja) | フッ素系イオン交換樹脂前駆体組成物とその製法 | |
WO2013031849A1 (ja) | スルホ基を有する有機化合物の製造方法、液状組成物の製造方法およびフルオロスルホニル基を有する有機化合物の加水分解処理方法 | |
EP2586800A1 (en) | Process for the treatment of sulfonyl fluoride polymers with supercritical carbon dioxide | |
JP2011052186A (ja) | 含フッ素重合体の凝集分離方法 | |
CN115398684A (zh) | 包含氟化聚合物和盐纳米粒子的复合材料以及包含其的制品 | |
JP2004018676A (ja) | 含フッ素ポリマー、含フッ素ポリマー製造方法、含フッ素ポリマー誘導体及び含フッ素成形体 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2005516355 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2549676 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007142580 Country of ref document: US Ref document number: 10583081 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2004807243 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2004807243 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 10583081 Country of ref document: US |