A composition useful for producing a superomniphobic coating on a substrate, the composition comprising a colloidal suspension of a fluorinated siloxane in a non-silicon-containing fluorinated solvent. In some embodiments, the composition further comprises particles of a hydrophobized metal oxide, e.g., silicon oxide, wherein the hydrophobized metal oxide may be fluorinated. In some embodiments, the composition further comprises a non-silicon-containing fluorinated polymer. The invention is also directed to methods for making the above composition. The invention is also directed to methods for using the above-described composition for rendering a substrate superomniphobic. The aforesaid method comprises depositing a liquid coating solution onto a substrate to form a coated substrate, followed by subjecting the coated substrate to a drying step to remove a liquid phase of the liquid coating solution, wherein the liquid coating solution comprises a colloidal suspension of a fluorinated siloxane in a non-silicon-containing fluorinated solvent.

A protective coating is provided, including a first coating formed on a surface of a substrate by plasma polymerization deposition when the substrate contacts plasmas. The plasmas include a plasma of a monomer A and a plasma of a monomer B, wherein the monomer A includes both a silicon structural unit of formula (I) and at least one amine group structural unit of formula (II) or formula (III); and monomer B includes a terminal carboxyl group structural unit. Further disclosed is a preparation method of the protective coating, the method includes: providing a substrate, gasifying monomers including the monomer A and the monomer B and then introducing the monomers into a plasma reactor, performing a plasma discharge, and forming the first coating on the surface of the substrate by plasma polymerization. Further disclosed is a device, which is provided with the protective coating on at least part of the surface thereof.

Various examples are related to template-free methodologies to obtain “semi-regular” micro/nano-textures utilizing ribbing instability behavior in viscoelastic polymers. The methodologies offer low manufacturing cost and scalability for real-world applications. In one example, a method includes forming a viscoelastic material coating and forming micro-scale and/or nano-scale 3D features on a surface of the viscoelastic material coating. The micro-scale and/or nano-scale 3D features can be formed under shearing stress using a roll-to-roll process without a template. The texture periodicity and height in the polymer coat film can be adjusted through the roll coating process parameters and/or the polymer composite behavior.

A method of forming a wear-resistant coating on an article includes depositing a chromium coating on a substrate of the article, and subsequently heating the coated article to enhance a plurality of through-cracks within the chromium coating. The method further includes applying a liquid filler material to the coated article such that at least one of the plurality of through-cracks is at least partially occupied by the filler material, and solidifying the liquid filler material.

A process for depositing a metal-adhesive, hydrophobic and electrically conductive coating based on electrically conductive microparticles and on a polymer matrix P comprising at least one thermoplastic fluoropolymer P1 and a thermosetting resin P2, comprises: in a first container, dissolve the polymer P1 in an organic solvent; in a second container, disperse the electrically conductive microparticles in an organic solvent; add, in the first container, the thermosetting resin P2 in the liquid state; mix the contents of the containers, then deposit the mixture on the substrate; crosslink the resin P2 and remove the solvents, to obtain a first coating; then impregnate the surface of the substrate with an additional resin solution P2 dissolved in a third solvent, which is a solvent of the resin P2 and a non-solvent of the polymer P1; eliminate the third solvent and crosslink while compressing the additional resin P2 in order to obtain the targeted final coating.

A modified polyamic acid, a preparation method thereof, and a preparation method of a composite film are provided. The modified polyamic acid includes polyamic acid and polyvinylidene fluoride. The modified polyamic acid is formed by introducing polyvinylidene fluoride having good thermal stability, high dielectric constant, excellent piezoelectric, and ferroelectric properties, so the dielectric constant and structural adjustability of the modified polyamic acid are improved.

A fluorine-containing polymer having repeating units derived from (a) a fluorine-containing monomer, (b) a fluorine-free non-crosslinkable monomer, and (c) a fluorine-free crosslinkable monomer. The fluorine-containing monomer (a) is a compound represented by formula: CH.sub.2═C(-X)—C(═O)—Y—Z—Rf . . . (a-I), wherein X is a hydrogen atom, a monovalent organic group or a halogen atom, Y is —O— or —NH—, Z is a direct bond or a divalent organic group, and Rf is a fluoroalkyl group having 1 to 20 carbon atoms. The fluorine-free non-crosslinkable monomer (b) includes (b1) a cyclic hydrocarbon group-containing monomer and (b2) a low Tg monomer, a homopolymer of which has a glass transition temperature (Tg) of lower than 0° C. Also disclosed is a coating composition including the fluorine-containing polymer and a liquid medium, a method for producing a coated article which includes coating an article with the coating composition and a coated article.

A fluoropolyether group-containing compound of formula (1) or (2):

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wherein R.sup.F1, R.sup.X1, R.sup.X2 and R.sup.Si are as defined herein.

Provided is a method for forming a coating film of a photocurable fluoropolyether-based elastomer composition, with which a uniform cured product of the composition can be obtained even in an interface, dark portion and deep portion of a base material without being subjected to a curing inhibition from the base material (resin base material in particular). The method for forming the coating film of the photocurable fluoropolyether-based elastomer composition includes a step of applying a light-irradiated photocurable fluoropolyether-based elastomer composition to a surface of a base material.

Methods of making components for a medicinal delivery device are described, in which a base composition comprising a polysulphone is applied to the surface of a component to create a base layer, a primer composition comprising a silane having two or more reactive silane groups separated by an organic linker group is applied to the base layer to create primed surface, and a coating composition comprising an at least partially fluorinated compound is applied to the primed surface. Corresponding coated components and a medicinal delivery device are disclosed.