Surface modified carbonate materials

Details Surface modified carbonate materials Surface modified carbonate materials

C - Chemistry, Metallurgy

04

B

C04B 41/83 (2006.01) C08J 7/04 (2006.01) C09D 11/00 (2006.01) H01B 1/04 (2006.01) H01M 4/96 (2006.01)

Patent

CA 2248304

Disclosed is a method for grafting a polymer onto the surface of a carbonate material with carboxyl, amine, and/or hydroxyl functions on its surface. Said material is placed in suspension in a solution including the polymer to be grafted, which has a carboxyl, amine, and/or hydroxyl function, said solution also being comprised of a polymer solvent. A process which stimulates the dehydration into a carboxyl function of an amine and/or hydroxyl function is then performed, and the polymer is grafted onto the carbonate material using ester or amide links. The invention can be used in the cathode or naode of an electrochemical generator, in polymer materials with low polar properties, in ink, and also as a conductive coating on flexible plastic used as an electrical contact, as electromagnetic shielding, or as static protection.

Image Greffage d'un polymère à la surface d'un matériau carboné comportant des fonctions carboxyles, amines et/ou hydroxyles à sa surface. On met ce matériau en suspension dans une solution comprenant le polymère à greffer, lequel comporte une fonction carboxyle, amine et/ou hydroxyle, la solution comprenant aussi un solvant du polymère. On effectue ensuite un traitement provoquant la déshydratation en une fonction carboxyle, d'une fonction amine et/ou hydroxyle et l'on greffe ainsi le polymère sur le matériau carboné par des liens esters ou amides. Utilisation dans la cathode ou l'anode d'un générateur électrochimique, dans un matériau polymère peu polaire, dans une encre, et comme dépôt conducteur sur un plastique flexible utilisé comme contact électrique, comme protection électromagnétique ou comme protection antistatique.

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