Coating compositions for coating an oilfield operational component, and related methods, may include in some aspects a coating composition having a trifunctional silane, a silanol, and a filler. The coating composition may be applied to a surface of the oilfield operational component that is configured to be exposed to a fluid. The coating composition may be applied to at least partially cover or coat the surface. The coating composition may be configured to chemically bond with a cured primer composition that includes an epoxy.

Provided is a CNT film coated substrate in which CNT is fixed to a substrate using a click reaction, so that a CNT film is uniformly formed with a high density and adhesive strength between the CNT film and the substrate is excellent to have high stability to water or an organic solvent. In the case of the conventional CNT film which was manufactured by spin coating, most of CNT was peeled off in a washing process, but in the case of the CNT film coated substrate according to the present invention, a high-density uniform CNT film coated substrate may be manufactured even after washing, and reproducibility between substrates may be secured.

Coating compositions for coating an oilfield operational component, and related methods, may include in some aspects a coating composition having a trifunctional silane, a silanol, and a filler. The coating composition may be applied to a surface of the oilfield operational component that is configured to be exposed to a fluid. The coating composition may be applied to at least partially cover or coat the surface. The coating composition may be configured to chemically bond with a cured primer composition that includes an epoxy.

Coating compositions for coating an oilfield operational component, and related methods, may include in some aspects a coating composition having a trifunctional silane, a silanol, and a filler. The coating composition may be applied to a surface of the oilfield operational component that is configured to be exposed to a fluid. The coating composition may be applied to at least partially cover or coat the surface. The coating composition may be configured to chemically bond with a cured primer composition that includes an epoxy.

Provided is a method of producing a fluorosilicone rubber laminate. The method comprises: (1) applying a primer composition onto a substrate, and forming a primer layer on a surface of the substrate; and (2) bringing a fluorosilicone rubber composition into contact with the primer layer, and adhering a fluorosilicone rubber to the primer layer. The fluorosilicone rubber composition comprises a platinum-based catalyst and/or a fluorosiloxane containing a silicon atom-bonded hydrogen atom. The primer composition comprises a platinum-based catalyst or a fluorosiloxane containing a silicon atom-bonded hydrogen atom, however the primer composition does not simultaneously comprise a platinum-based catalyst and a fluorosiloxane containing a silicon atom-bonded hydrogen atom. Either the primer composition or the fluorosilicone rubber composition comprises a platinum-based catalyst or a fluorosiloxane containing a silicon atom-bonded hydrogen atom. A laminate in which a fluorosilicone rubber layer and a base material are favorably adhered to each other can be obtained.

Provided is a method of producing a fluorosilicone rubber laminate. The method comprises: (1) applying a primer composition onto a substrate, and forming a primer layer on a surface of the substrate; and (2) bringing a fluorosilicone rubber composition into contact with the primer layer, and adhering a fluorosilicone rubber to the primer layer. The fluorosilicone rubber composition comprises a platinum-based catalyst and/or a fluorosiloxane containing a silicon atom-bonded hydrogen atom. The primer composition comprises a platinum-based catalyst or a fluorosiloxane containing a silicon atom-bonded hydrogen atom, however the primer composition does not simultaneously comprise a platinum-based catalyst and a fluorosiloxane containing a silicon atom-bonded hydrogen atom. Either the primer composition or the fluorosilicone rubber composition comprises a platinum-based catalyst or a fluorosiloxane containing a silicon atom-bonded hydrogen atom. A laminate in which a fluorosilicone rubber layer and a base material are favorably adhered to each other can be obtained.

To retain voids in a paint film even if the paint film is subjected to pressure during storage, transportation, and press working. A pre-painted metal sheet according to the present invention includes: a metal sheet; and a void-containing paint film, which is located on at least one surface of the metal sheet, with dispersed fine particles and voids, wherein when a cross-section of the void-containing paint film cut in a thickness direction of the void-containing paint film is observed, the voids are present in 40 to 95 area % of a total area of the cross-section of the void-containing paint film when an average particle diameter of the fine particles is t [μm] and an average film thickness of the void-containing paint film is T [μm], a ratio t/T is in a range of 0.7 to 3.0, and an elastic modulus of the fine particles, when compressed by 10% from the thickness direction, is 30 MPa or more.

To retain voids in a paint film even if the paint film is subjected to pressure during storage, transportation, and press working. A pre-painted metal sheet according to the present invention includes: a metal sheet; and a void-containing paint film, which is located on at least one surface of the metal sheet, with dispersed fine particles and voids, wherein when a cross-section of the void-containing paint film cut in a thickness direction of the void-containing paint film is observed, the voids are present in 40 to 95 area % of a total area of the cross-section of the void-containing paint film when an average particle diameter of the fine particles is t [μm] and an average film thickness of the void-containing paint film is T [μm], a ratio t/T is in a range of 0.7 to 3.0, and an elastic modulus of the fine particles, when compressed by 10% from the thickness direction, is 30 MPa or more.

A polypeptide monolayer with a low surface potential and hydrophobicity. The polypeptide is composed of polypeptide molecules with a molecular weight of (1.48±0.2)×10.sup.5 g/mol, a thickness of the monolayer is 6.2-9.0 nm, the exposure of primary amino groups on the surface of the monolayer is 9.5-15%, a Zeta potential of the polypeptide monolayer is (−3)−(−9) mV, and a contact angle of the monolayer is (61±1°)-(84±1°). The monolayer can be ultrathin, with a minimum thickness of only about 6.6 nm. The polypeptide monolayer can also be applied to the preparation of a biosensor, which is conductive to increase in limit of detection. The content of primary amino groups on the surface of polypeptide monolayer is conductive to controllability of further chemical modification and laying the foundation for achieving controllable grafting of polysiloxane and biological preparations in the later stage.

Methods of forming a metal-alloy graphene nanocomposites are provided. The methods include providing a graphene substrate and forming a conducting polymer layer on a first major surface of the graphene substrate. The methods also include pyrolyzing the conducting polymer layer to form a nitrogen-doped graphene substrate and dispersing a plurality of metal-alloy nanoparticles on a first surface of the nitrogen-doped graphene substrate to form the nanocomposite.