Abstract: The present invention provides a separation membrane suitable for separating water from a liquid mixture containing an alcohol and water. The separation membrane of the present invention includes a metal organic framework. On the separation membrane, at least one of requirements (i) and (ii) below holds: (i) a ratio R1 of a number N2 of molecules satisfying a specified condition (b) with respect to a number N1 of molecules satisfying a specified condition (a) is less than 0.29; (ii) a ratio R2 of an adsorption amount of water adsorbed by the metal organic framework under water vapor at 25° C. and 3.2 kPa with respect to an adsorption amount of ethanol adsorbed by the metal organic framework under an ethanol atmosphere at 25° C. and 7.4 kPa is more than 4.0.

Abstract: A power storage device positive electrode having an excellent activation property from the initial charge/discharge stage, and a power storage device employing the positive electrode are provided. The power storage device positive electrode includes an active material including at least one of polyaniline and a polyaniline derivative, a conductive agent, and a binder, wherein the active material including at least one of the polyaniline and the polyaniline derivative has a polyaniline oxidant proportion of not less than 45 wt. % based on the overall weight of the polyaniline active material, wherein the binder has Hansen solubility parameters such that the sum of a polarity term and a hydrogen bonding term is not greater than 20 MPa1/2.

Abstract: Provided is an ionomer solution including an anion-exchange resin and a solvent. The anion-exchange resin is dissolved in the solvent, the anion-exchange resin includes a matrix resin and an anion-exchange group, the matrix resin includes a styrene elastomer, and the anion-exchange group is a quaternary ammonium salt group having at least one unit derived from an amine selected from the group consisting of an N,N-dimethylalkylamine having an alkyl group having two or more carbon atoms and a bicycloalkane having a nitrogen atom at a bridgehead position.

Abstract: The present invention provides a novel sulfonic acid group-containing diamine compound represented by formula (1) below, and a method for producing the same. This compound has a fluorene skeleton with sulfonic acid groups or derivatives thereof. In this compound, a substituent having an amino group is bonded to each of carbon atoms at the 2-position and the 7-position in the skeleton, and no substituent is bonded to a carbon atom at the 9-position in the skeleton. A in formula (1) denotes an optionally-substituted divalent aliphatic group (having a carbon number of 10 or less) or an optionally-substituted divalent aromatic group (having the number of rings of 4 or less), for example.

Abstract: The present invention provides a novel polyimide containing a diamine component that has a fluorene skeleton having a sulfonic acid group or a derivative thereof, and a novel polyimide-based polymer electrolyte membrane containing this polyimide as a main component and having properties based on this polyimide (for example, a good balance between the resistance to methanol crossover and the proton conductivity). The polyimide of the present invention contains a structural unit (P) represented by the following formula (1). The polymer electrolyte membrane of the present invention contains this polyimide as a main component.

Abstract: Provided is a polyimide-based proton-conductive polymer electrolyte membrane having high methanol permeation resistance property (methanol blocking property). The proton-conductive polymer electrolyte membrane includes, as a main component, a polyimide resin formed by polycondensation of a tetracarboxylic dianhydride, a first aromatic diamine having a proton-conductive group, and a second aromatic diamine having no proton-conductive group. The second aromatic diamine has a fused ring skeleton composed of three or more rings. This electrolyte membrane is suitable for use in a polymer electrolyte fuel cell (PEFC), in particular in a direct methanol fuel cell (DMFC).

Abstract: The present invention provides a novel diamine compound represented by formula (1) below. A in formula (1) denotes an optionally-substituted divalent aliphatic group (having a carbon number of 10 or less) or an optionally-substituted divalent aromatic group (having the number of rings of 4 or less), for example. The diamine compound of the present invention can be used as a raw material or a crosslinking agent for polyamide, polyimide, polyurethane, epoxy resin, etc.

Abstract: The present invention provides a novel diamine compound represented by formula (1) below. A in formula (1) denotes an optionally-substituted divalent aliphatic group (having a carbon number of 10 or less) or an optionally-substituted divalent aromatic group (having the number of rings of 4 or less), for example. The diamine compound of the present invention can be used as a raw material or a crosslinking agent for polyamide, polyimide, polyurethane, epoxy resin, etc.

Abstract: The present invention provides a novel polyimide containing a diamine component that has a fluorene skeleton having a sulfonic acid group or a derivative thereof, and a novel polyimide-based polymer electrolyte membrane containing this polyimide as a main component and having properties based on this polyimide (for example, a good balance between the resistance to methanol crossover and the proton conductivity). The polyimide of the present invention contains a structural unit (P) represented by the following formula (1). The polymer electrolyte membrane of the present invention contains this polyimide as a main component.

Abstract: An electrolyte membrane (1) includes a base material layer (1) containing a hydrocarbon-based electrolyte as a main component, and a surface layer (5) laminated with the base material layer (1). The surface layer (5) is a layer containing, as a main component, a polymeric material having a hydroxyl group and a proton conductive group. The polymeric material that constitutes the surface layer (5) contains, for example, a first polymer having a hydroxyl group, and a second polymer having a proton conductive group. A matrix is formed by cross-linking the first polymer, and the second polymer can be held in the matrix.

Abstract: The present invention provides a novel sulfonic acid group-containing diamine compound represented by formula (1) below, and a method for producing the same. This compound has a fluorene skeleton with sulfonic acid groups or derivatives thereof. In this compound, a substituent having an amino group is bonded to each of carbon atoms at the 2-position and the 7-position in the skeleton, and no substituent is bonded to a carbon atom at the 9-position in the skeleton. A in formula (1) denotes an optionally-substituted divalent aliphatic group (having a carbon number of 10 or less) or an optionally-substituted divalent aromatic group (having the number of rings of 4 or less), for example.

Abstract: The present invention provides a novel polyimide containing a diamine component having a fluorene skeleton and a novel polyimide-based polymer electrolyte membrane containing this polyimide as a main component and having properties based on this polyimide (for example, high resistance to methanol crossover). The polyimide of the present invention contains a structural unit (P) represented by the following formula (1). The polyimide-based polymer electrolyte membrane of the present invention contains the polyimide of the present invention as a main component.

Abstract: The present invention provides a novel diamine compound represented by formula (1) below. A in formula (1) denotes an optionally-substituted divalent aliphatic group (having a carbon number of 10 or less) or an optionally-substituted divalent aromatic group (having the number of rings of 4 or less), for example. The diamine compound of the present invention can be used as a raw material or a crosslinking agent for polyamide, polyimide, polyurethane, epoxy resin, etc.

Abstract: A method of manufacturing a proton-conductive polymer electrolyte membrane using polyvinyl alcohol (PVA) as a base material and having excellent proton conductivity and methanol blocking properties is provided. The method includes: heat-treating a precursor membrane including PVA and a water-soluble polymer electrolyte having a proton conductive group to proceed crystallization of the PVA; and chemically crosslinking the heat-treated precursor membrane with a crosslinking agent reactive with the PVA, to form a polymer electrolyte membrane in which a crosslinked PVA is a base material and protons are conducted through the electrolyte retained in the base material. The content of a water-soluble polymer except the PVA and the water-soluble polymer electrolyte in the precursor membrane is in a weight ratio of less than 0.1 with respect to the PVA.

Abstract: Provided is a polyimide-based proton-conductive polymer electrolyte membrane having high methanol permeation resistance property (methanol blocking property). The proton-conductive polymer electrolyte membrane includes, as a main component, a polyimide resin formed by polycondensation of a tetracarboxylic dianhydride, a first aromatic diamine having a proton-conductive group, and a second aromatic diamine having no proton-conductive group. The second aromatic diamine has a fused ring skeleton composed of three or more rings. This electrolyte membrane is suitable for use in a polymer electrolyte fuel cell (PEFC), in particular in a direct methanol fuel cell (DMFC).

Abstract: An electrolyte membrane (1) includes a base material layer (1) containing a hydrocarbon-based electrolyte as a main component, and a surface layer (5) laminated with the base material layer (1). The surface layer (5) is a layer containing, as a main component, a polymeric material having a hydroxyl group and a proton conductive group. The polymeric material that constitutes the surface layer (5) contains, for example, a first polymer having a hydroxyl group, and a second polymer having a proton conductive group. A matrix is formed by cross-linking the first polymer, and the second polymer can be held in the matrix.

Abstract: A method of manufacturing a proton-conductive polymer electrolyte membrane using polyvinyl alcohol (PVA) as a base material and having excellent proton conductivity and methanol blocking properties is provided. The method includes: heat-treating a precursor membrane including PVA and a water-soluble polymer electrolyte having a proton conductive group to proceed crystallization of the PVA; and chemically crosslinking the heat-treated precursor membrane with a crosslinking agent reactive with the PVA, to form a polymer electrolyte membrane in which a crosslinked PVA is a base material and protons are conducted through the electrolyte retained in the base material. The content of a water-soluble polymer except the PVA and the water-soluble polymer electrolyte in the precursor membrane is in a weight ratio of less than 0.1 with respect to the PVA.