摘要:
Described herein are coatings. The coatings can, for example, catalyze carbon gasification. In some examples, the coatings comprise: a first region having a first thickness, the first region comprising a manganese oxide, a chromium-manganese oxide, or a combination thereof; a second region having a second thickness, the second region comprising Ni, Fe, W, Cr, Co, Mn, Ti, Mo, V, Nb, Zr, Si, C, or a combination thereof; and an alkaline earth metal, an alkaline earth oxide, an alkaline earth carbonate, an alkaline earth silicate, molybdenum, a molybdenum oxide, a molybdenum carbide, a mixed-metal perovskite, a mixed metal inorganic oxide, or a combination thereof.
摘要:
Novel formulations of chemically bonded phosphate glass-ceramic sprayable coatings are disclosed. The disclosed coatings retain all the positive attributes of similar coatings disclosed in recent patents and a patent application on corrosion and fire protection, and in addition, provide superior surface characteristics, which include, superior surface toughness and smoothness, better abrasion and acid resistance, less erosion and longer durability. They are phosphate-bonded glass-ceramic coatings that are pore-free, and therefore, water cannot penetrate into these coatings. Unlike the previous inorganic oxide-based phosphate coatings, the glassy phase in these coatings provides a translucent and dense surface. Due to smoothness of these coatings, they are hydrophobic and easy to wash. The component pastes are smoother to pump, do not settle during storage and transport, and in addition, do not exhibit pozzalinic properties or do not harden during storage. These coatings can be used in place of polymer-based coatings for corrosion and fire protection, heat reflection, for marine coatings applications, and as decorative coatings. The coating material itself may be cast into solid-shapes, or used as an adhesive, and its whisker- and fiber-reinforced composites can be used as thermal resistant, inorganic and yet flexible products for many applications related to high temperature environments, corrosive conditions, and in place of products vulnerable to microbial and bacterial attacks.
摘要:
The present disclosure relates to a protective coating composition comprising: • a) an aqueous continuous liquid phase; and • b) acidified silica nanoparticles dispersed in the aqueous continuous liquid phase, wherein the acidified silica nanoparticles comprise mixed hydrophilic and oleophobic surface functionalization, wherein the hydrophilic surface functionalization is obtained by covalently linking the silica nanoparticle to an organofunctional moiety comprising a functional group selected from the group consisting of polyalkyleneoxy-containing moieties and zwitterionic moieties,and wherein the oleophobic surface functionalization is obtained by covalently linking the silica nanoparticle to an organofunctional moiety comprising a functional group selected from fluorine-containing moieties. In another aspect, the present disclosure is directed to a silica nanoparticle as described above, which comprise both hydrophilic and oleophobic surface functionalization. In still another aspect, the present disclosure is directed to a method of treating a hard surface.
摘要:
The present invention provides a layered coating adhered to a substrate surface which conforms to a surface topography defined by the anisotropic chain-like silica nanoparticles on the substrate. The layered coating comprises a layer of anisotropic chain-like silica nanoparticles. The anisotropic chain-like silica nanoparticles comprise linked arrays of silica net-negatively charged nanoparticles, each linked array having at least one linear dimension of about 100 nm to about 1200 nm and the anisotropic chain-like silica nanoparticles each have a diameter of about 20 nm to about 80 nm. The substrate surface comprises surface active moieties carrying a net positive charge and the chain-like anisotropic silica nanoparticles are held to the surface by electrostatic charge. Advantageously, the layered coatings are transparent and superhydrophobic. Also provided are articles containing these layered coatings.