Porous composite product particularly with high specific surface area, method for preparing and electrode for electrochemical assembly formed with a porous composite film
AssigneeBollore
InventorsJean-François Penneau, François Capitaine, Philippe Le Goff
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Abstract
A porous composite product in the form of a film with a high specific surface. Used in a wide range of electromechanical products especially in the field of selective membranes, packaging or catalysis. The porous composite product has a high homogeneity in the distribution of the filler and continuous structure. The product is capable of being obtained by extrusion.
Claims17
A porous composite product with a homogeneous structure having a property that renders its self-supportive, the product being provided in the form of a film, exhibiting a “BET” specific surface greater than 10 m2/g and being formed of at least 20% by weight of at least one filler with the balance of the product being a non-fibrillated polymeric material, the said product being obtained by extrusion and having an open porous structure, wherein the at least one filler exhibits a specific surface greater than 1000 m2/g and the mean diameter of a plurality of pores of the porous composite product is less than 0.5 μm,
- wherein the polymeric material comprises elastomers or polymers selected from the group consisting of polyolefins, acrylic polymers, aromatic polymers, polyamides, polyimides, and vinyl polymers,
- wherein the polymeric material also comprises thermoplastic elastomers, soluble in polar organic solvents or water, which remain after the implementation of the manufacturing process, the thermoplastic elastomers selected from the group consisting of polyethers, poly(vinyl alcohol)s and ethylene-vinyl alcohol copolymers, and
- wherein the thermoplastic elastomers, soluble in polar organic solvents or water, which remain after the implementation of the manufacturing process include polyethers with a molecular mass of between 200,000 and 1,000,000.
A porous composite product with a homogeneous structure having a property that renders itself supportive, the product being provided in the form of a film, the product exhibiting a specific surface greater than 10 m2/g and comprising between 30% and 85% by weight of at least one filler with the balance of the product being a non-fibrillated polymeric material, the product being obtained by extrusion and having an open porous structure, wherein the at least one filler exhibits a specific surface greater than 1000 m2/g and the mean diameter of a plurality of pores of the porous composite product is less than 0.5 μm,
- wherein the polymeric material comprises elastomers or polymers selected from the group consisting of polyolefins, acrylic polymers, aromatic polymers, polyamides, polyimides, and vinyl polymers,
- wherein the polymeric material also comprises thermoplastic elastomers, soluble in polar organic solvents or water, which remain after the implementation of the manufacturing process, the thermoplastic elastomers selected from the group of consisting of polyethers, poly(vinyl alcohol)s and ethylene-vinyl alcohol copolymers, and
- wherein the thermoplastic elastomers, soluble in polar organic solvents or water, which remain after the implementation of the manufacturing process include polyethers with a molecular mass of between 200,000 and 1,000,000.
Dependencies are inferred from the claim text.