摘要:
The invention concerns porous substrates impregnated with metal catalyst, in particular intended for use as electrodes in a fuel cell such as a proton exchange membrane cell, and method for preparing same. In particular, the present invention concerns a method for impregnating a porous substrate with metal catalyst by high power impulse magnetron sputtering of one or more metal targets, the target(s) and the substrate being placed in an enclosure containing a gaseous plasma medium, the metal of the target(s) being chosen from the transition metals and the alloys of same, said method comprising the following steps: a) applying a pulsed voltage U t to the target, b) polarising the porous substrate by applying a pulsed voltage U s with a delay Δt relative to the start of step (a).
摘要:
The invention relates to a process for preparing a composite material comprising a fluorinated polymer matrix and a filler consisting of ion-exchange inorganic particles, comprising a step of in situ synthesis of said particles within the polymer matrix, said matrix comprising at least one first copolymer consisting of a copolymer comprising at least two types of fluorinated repeat units, one type of which bears at least one pendant maleic anhydride group.
摘要:
The invention relates to copolymers comprising: *at least one repeating unit having the following formula (I): Formula (I) *at least one repeating unit having the following formula (II): Formula (II) and *at least one repeating unit having the following formula (III): Formula (III) in which: -R 1 and R 2 are, independently of one another, an alkylene group; -Z 1 is a group of formula -PO 3 R 3 R 4 , wherein R 3 and R 4 are, independently of one another, a hydrogen atom, an alkyl group or a cation; -Z 2 is a group of formula -SO 2 R 5 , R 5 being an alkyl group or an aryl group; -X and Y are, independently of one another, a halogen atom or a perfluorocarbon-based group.
摘要:
The invention concerns a method for preparing a composite material comprising a fluorinated polymer matrix and a filler consisting of inorganic ion-exchange particles comprising a step of in situ synthesis of said particles in the polymer matrix in the presence of a compatibilising agent consisting of a copolymer comprising a first repetitive pattern resulting from the polymerisation of a fluorinated ethylene monomer and a second repetitive pattern resulting from the polymerisation of an optionally fluorinated (meth)acrylic monomer, said first repetitive pattern being different from said second repetitive pattern and said copolymer being different from the (co)polymer or (co)polymers that make up the fluorinated polymer matrix.
摘要:
L'invention concerne un procédé de fabrication d'un élément d'échange d'un échangeur, le procédé comprenant : a) le positionnement d'une membrane (10) sur une face avant d'un support de mise en forme, la membrane (10) se conformant à la forme de ladite face avant ; b) la formation, par fabrication additive, d'une structure de maintien adhérant sur une face libre de la membrane (10) ; c) le retrait du support de mise en forme de manière à libérer l'élément d'échange formé par la membrane (10) et la structure de maintien.
摘要:
Copolymers comprising at least one recurrent unit of the following formula (I) are provided: and at least one recurrent unit of the following formula (II): wherein: R1 is an alkylene group; Z is a —PO3R3R4, R3 and R4 representing independently of each other, a hydrogen atom an alkyl group, a cation; X and Y represent, independently of each other, a halogen atom, a perfluorocarbon group.
摘要:
Copolymers comprising at least one recurrent unit of the following formula (I) are provided: and at least one recurrent unit of the following formula (II): wherein: R1 is an alkylene group; Z is a —PO3R3R4, R3 and R4 representing independently of each other, a hydrogen atom an alkyl group, a cation; X and Y represent, independently of each other, a halogen atom, a perfluorocarbon group.
摘要:
L'invention concerne un procédé de fabrication d'un élément d'échange d'un échangeur, le procédé comprenant : a) le positionnement d'une membrane (10) sur une face avant d'un support de mise en forme, la membrane (10) se conformant à la forme de ladite face avant ; b) la formation, par fabrication additive, d'une structure de maintien adhérant sur une face libre de la membrane (10) ; c) le retrait du support de mise en forme de manière à libérer l'élément d'échange formé par la membrane (10) et la structure de maintien.