Reinforced polymer

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 5/04 (2006.01) C01B 31/02 (2006.01) C08J 9/00 (2006.01) C08K 7/24 (2006.01)

Patent

CA 2515895

The present invention relates to a process for the preparation of a carbon nanotubes reinforced polymer. The process comprises the following steps: a) contacting carbon nanotubes in an aqueous medium with a water-soluble component, comprising either a water-soluble first polymer or a water-soluble surfactant; b) mixing the resulting product from step A) with either an aqueous latex of a second polymer, or with (a) water-soluble precursor(s) of a second polymer; c) removing water from the so obtained mixture; d) heating the product from step C) to a temperature at which the second polymer flows or where the second polymer is formed from out of its precursor(s); and e) processing and/or solidifying the product of step D) into a desired form. As a result the carbon nanotubes retain essentially their original aspect ratio. As a result, mechanical and conductivity properties are improved.

L'invention concerne un procédé de préparation d'un polymère renforcé de nanotubes de carbone. Le procédé comprend les étapes suivantes consistant: a) à mettre en contact des nanotubes de carbone dans un support aqueux avec un composant hydrosoluble, comprenant soit un premier polymère hydrosoluble, soit un tensioactif hydrosoluble; b) à mélanger le produit obtenu à l'étape A) avec soit un latex aqueux d'un second polymère, soit avec (a) un ou plusieurs précurseurs hydrosolubles d'un second polymère; c) à éliminer l'eau du mélange ainsi obtenu; d) à chauffer le produit de l'étape C) à une température à laquelle le second polymère s'écoule ou est formé à partir des précurseurs; et e) à traiter et/ou solidifier le produit de l'étape D) selon une forme souhaitée. Les nanotubes de carbone conservent sensiblement leur rapport d'aspect original. Par conséquent, les propriétés mécaniques et de conductivité sont améliorées.

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