Method of making a polymer/functionalized nanographene composite coating

A method of forming a nano-coating on a substrate, comprising:

• A) depositing a first layer on a surface of the substrate, the first layer comprising a polymeric composition;
• B) depositing a second layer on the surface of the first layer opposite the substrate, the second layer comprising nanographene derivatized with a functional group selected from the group consisting of carboxy, epoxy, ether, ketone, amine, hydroxyl, alkoxy, alkyl, lactones, aryl, functionalized polymeric, functionalized oligomeric groups, and combinations thereof;
• and
• C) repeating steps A) and B), such that multiple alternating layers are formed,
• wherein each successive occurrence of the first layer is deposited on a previously deposited occurrence of the second layer, and the method further comprises treating the substrate by a corona treatment, organosilane treatment, or polymer-based primer treatment.

A method of forming a nano-coating on a substrate, comprising:

• A) depositing a first layer on a surface of the substrate, the first layer comprising a polymeric composition;
• B) depositing a second layer on the surface of the first layer opposite the substrate, the second layer comprising nanographene derivatized with a functional group selected from the group consisting of carboxy, epoxy, ether, ketone, amine, hydroxyl, alkoxy, alkyl, lactones, aryl, functionalized polymeric, functionalized oligomeric groups, and combinations thereof;
• and
• C) repeating steps A) and B), such that multiple alternating layers are formed,
• wherein each successive occurrence of the first layer is deposited on a previously deposited occurrence of the second layer, and wherein the article is a packer element, a blow out preventer element, a torsional spring of a sub surface safety valve, a submersible pump motor protector bag, a blow out preventer element, a sensor protector, a sucker rod, an O-ring, a T-ring, a gasket, a pump shaft seal, a tube seal, a valve seal, a seal for an electrical component, an insulator for an electrical component, a seal for a drilling motor, or a seal for a drilling bit.