摘要:
Process for depositing graphene on the run on the surface (17) of a metallic or metallized continuous reinforcement (R), positioned at the periphery of which is a surface metal layer (Ms) selected from copper, nickel and copper-nickel alloys, said process comprising at least one step of flame spray pyrolysis (FSP), under a reducing atmosphere (13), of a precursor of carbon that generates in the flame at least one carbon-containing gas such as carbon monoxide, which is sprayed on the surface (17) of the reinforcement while running, and decomposes thereon to form one or more layers of graphene at the surface of the surface metal; an additional step of functionalization of the graphene makes it possible to adhere the reinforcement to a polymer matrix such as a rubber matrix.
摘要:
Metallic or metallised, filiform reinforcement (R), for example, a carbon steel wire, film, ribbon or cable, on the outside of which is deposited a layer of metal (Ms), referred to as "surface metal", selected from copper, nickel and copper-nickel alloys, said surface metal layer (Ms) being itself coated, at least partially, with at least one graphene layer(GR, Grf); preferably, at least one functional group that can be cross-linked with a polymer matrix being grafted onto said graphene. This reinforcement is effectively protected against corrosion by the graphene present at the surface, (17); advantageously, the reinforcement can be glued directly, without an adhesion primer or the addition of a metallic salt, to an unsaturated rubber matrix such as natural rubber, due to the possible functionalisation of said graphene.
摘要:
Process for surface sulfurization of a body, especially a metal reinforcement, at least the surface of which comprises a layer of a metal, called the surface metal, able to form sulphides, this metal for example being chosen from copper, zinc and their alloys; this process comprises at least one step of flame spray pyrolysis (FSP) of a sulphur-donating precursor, for example thiophene, generating hydrogen sulphide in the flame. The bodies or metal reinforcements thus treated may be directly bonded, without a bonding primer or addition of a metal salt such as a cobalt salt, to matrices of unsaturated rubbers such as natural rubber.
摘要:
A cured or uncured tyre, reinforced by at least one metallic or metallised reinforcement, for example, a carbon steel wire, film, ribbon or cable, on the outside of which is deposited a layer of metal referred to as "surface metal" selected from copper, nickel and copper-nickel alloys, characterised in that this surface metal layer is itself coated, at least partially, by at least one functionalised graphene layer comprising at least one functional group able to be cross-linked in the cured tyre with a polymer matrix such as a diene elastomer.
摘要:
Ready-to-use metal reinforcement, for example a wire or cable made of bronze-coated carbon steel, able to adhere directly by vulcanisation to a matrix of an unsaturated rubber such as natural rubber, characterised in that its surface is provided with nanoparticles of at least one sulphide of a metal chosen from the group formed of cobalt, copper, iron, zinc and alloys comprising at least one of these elements. Use of such a reinforcement as a reinforcing element in a finished rubber article such as a tire; the presence of these nanoparticles on the reinforcement of the invention in the raw manufactured state allows a strong and durable adhesive bond to be created between the metal and the rubber, by virtue of a strong mechanical and chemical anchoring effect, thereby making it unnecessary to use adhesion-promoting agents such as cobalt salts in the rubber matrices to be reinforced by the reinforcement according to the invention.