Hydrophobic Nanostructured Coatings for Automotive Surfaces

Preparation of super hydrophobic nano coatings through a novel method that introduces hydrophobic groups onto silicon dioxide surfaces through a controlled reaction sequence. The process involves a two-step reaction sequence: first, a hydrophilic precursor solution containing a concentrated sulfuric acid and hydrogen peroxide is mixed with a surfactant solution to form a solution A. This solution is then treated with sodium borohydride to facilitate the formation of a hydrophobic surface layer. The hydrophobic layer is then characterized through contact angle measurements and surface roughness analysis to produce super hydrophobic nano coatings.

Source

A self-cleaning glass coating that combines superhydrophobicity with photocatalytic activity through a novel PDMS-modified nanometer titanium dioxide (TiO2) coating. The coating achieves both hydrophobicity and photocatalytic degradation of organic contaminants through a single-step preparation process that incorporates PDMS as a binder. The TiO2 nanoparticles are evenly distributed across the glass surface, ensuring strong adhesion and uniform dispersion. The coating undergoes a controlled drying process to achieve optimal superhydrophobicity and durability.

Source

A superhydrophobic composite material comprising calcium carbonate and silica nanoparticles with a unique papilla structure that mimics the natural lotus leaf surface. The composite material features a hydrophobic outer layer with a waxy coating, while the silica nanoparticles have a hydrophobic surface. This composite exhibits enhanced water repellency and anti-fog properties, making it suitable for applications requiring high hydrophobicity and low contact angle.

Source

A superhydrophobic and icephobic coating method for aircraft components that enables uniform and durable performance across various substrate types. The coating consists of a multilayer structure comprising a base layer and multiple thin layers of nanometric silica functionalized with hydrophobic functional groups. The base layer is prepared by drying a mixture of polymeric resins and solvents. The nanometric silica layers are applied through a controlled drying process, followed by the base layer. The nanometric silica layers serve as a hydrophobic surface for icephobic properties, while the base layer provides a hydrophobic surface for superhydrophobic properties. This multilayer structure enables consistent performance across different substrate materials, including metals, composites, and polymers.

Source

A composite particle coating that can be applied to surfaces to create hydrophobic or superhydrophobic properties. The coating consists of a core with a hydrophilic polymer layer and a second layer with a hydrophobic polymer layer, with specific regions between the layers being porous. This composition can be dispersed in water and then applied to surfaces, where upon evaporation, the composite particles form a hydrophobic or superhydrophobic coating. The coating can be applied to various surfaces such as cloth, cardboard, wood, metal, drywall, and other painted surfaces.

Source

A superhydrophobic coating layer with enhanced durability and adhesion through a novel nanocomposite structure. The coating comprises three-dimensional porous nanocomposite building units formed by inorganic hydrophobic nanoparticles and hydrophobic polymer nano-spheres, with the nanoparticles and polymer spheres interconnected through a hydrophobic adhesive. This nanocomposite structure enables uniform pore formation while maintaining the hydrophobic properties of the polymer matrix, significantly improving the coating's durability and bonding strength compared to conventional superhydrophobic coatings.

Source

Superhydrophobic coatings that are easily applied, optically clear, and well-bonded to substrates without sacrificing hydrophobicity. The coatings contain a binder with a hydrophobic fluorinated polymer, hydrophobic fumed silica nanoparticles, and a fluorinated solvent. The composition is coated onto a substrate and the solvent is evaporated to leave a thin film coating. The composition provides superhydrophobicity, optical transparency, and good adhesion to the substrate. The nanoparticles protrude from the coating surface to maintain superhydrophobicity.

Source

High-transparency super-hydrophobic spray coating and preparation method that enables ultra-high performance surfaces with minimal surface modification. The coating combines a transparent, low-energy binder with nano-scale filler dispersion, where the filler is modified with a hydrophobic agent. The binder creates micron-scale roughness through atomization, while the modified filler concentrates at the interface due to its low surface energy, forming nanometer-scale roughness. The refractive index of the binder matches that of the filler, ensuring high transparency and maintaining the coating's original appearance after application.

Source

Hydrophobic silica particles with controlled pore size that enable surface wetting resistance. The particles have a controlled pore diameter of 80-500 Å, with a weight ratio of 1:2.5 to binder, and exhibit a static contact angle of 90-140° to water at room temperature. The particles can be produced using a continuous milling process. The coating composition can be formulated with fluorinated polymers and solvents, and can be applied using various coating methods. The resulting surface exhibits superior wetting resistance compared to conventional hydrophilic surfaces.

Source

Hydrophobic, superhydrophobic, and snowphobic composites comprising micro/nano rough surface materials. The composites contain a polymer matrix and micro/nano rough surface materials, including metal oxide nanofibers and silicone microbeads. The rough surface materials are dispersed within the polymer matrix and provide enhanced hydrophobic and snow-repellent properties. The composites can be formulated for various applications, including anti-ice and anti-snow coatings for surfaces such as windshields, road surfaces, and building facades.

Source

Self-cleaning polymer films with water contact angles of 140° or higher, comprising a thermoplastic substrate coated with hydrophobic particles containing a metal oxide core with a hydrocarbon chain length of 2-40 carbon atoms. The films exhibit improved adhesion between the substrate and hydrophobic particles compared to conventional systems, while maintaining non-toxicity for food and liquid packaging applications.

Source

Superoleophilic coatings for paints and epoxies that maintain their hydrophobic properties even after surface damage. The coatings incorporate superoleophilic particles that form a hydrophobic monolayer on the substrate surface when exposed to water, while the particles themselves remain hydrophobic. This self-reinforcing mechanism enables the coatings to maintain their hydrophobic properties over extended periods, even after surface damage. The coatings can be produced through a novel method of pinning oil within the pores of superoleophilic particles, which creates a stable hydrophobic surface.

Source

A transparent, superhydrophobic coating with enhanced durability and substrate versatility, achieved through a novel preparation method that combines room temperature curing resin with solvent and surface modification. The coating exhibits exceptional hydrophobicity, transparency, and mechanical stability, making it suitable for applications requiring both self-cleaning and oil-water separation properties.

Source

A superhydrophobic nano-SiO2 modified epoxy acrylic resin coating with enhanced toughness and resistance to cracking. The coating comprises epoxy resin, acrylic acid, heptafluorodecyl methacrylate, 1,12-diaminododecane, initiator, and modified SiO2 modified poly(dopamine) in a specific ratio. The coating forms through a two-step polymerization process involving initiator activation, cross-linking of epoxy and acrylic monomers, and ring-opening polymerization of the modified dopamine. The combination of nano-SiO2 and modified poly(dopamine) creates a superhydrophobic surface with enhanced mechanical properties.

Source

A superhydrophobic coating method that simplifies the production process by using grinding dispersion to form nanoparticles. The coating comprises a diluent, a film-forming substance, and composite nano-modified particles. The film-forming substance dissolves in the diluent, and the modifier is bonded to the nano-silica particles. This dispersion-based approach enables the creation of superhydrophobic coatings through a single-step process, eliminating the need for complex nano-scale surface modification.

Source

A superhydrophobic paint coating that achieves water-repelling surfaces with high durability and optical clarity through a novel combination of fluorinated metal oxide particles and a polymer binder. The coating comprises a fluorinated metal oxide particle suspension, a polymer binder, and a plasticizer, which are combined in a specific ratio to achieve the desired superhydrophobic properties. The coating can be applied to various substrate materials using conventional coating techniques. The fluorinated metal oxide particles are specifically designed to maintain their superhydrophobic state even under mechanical stress, while the polymer binder enhances the coating's durability and optical performance.

Source

Hydrophobic coating compositions that achieve superhydrophobic properties through a combination of solvent evaporation and energy curing. The compositions contain alkylenic reactive sites in the polymer backbone, enabling crosslinking and polymerization. The coatings exhibit exceptional water repellency, with contact angles above 150° and roll-off angles below 10°. The coatings can be applied to substrates and cured using conventional methods, including solvent evaporation and energy curing. The resulting surfaces maintain their hydrophobic properties even under elevated temperatures.

Source

Nano superhydrophobic coating and its production process to achieve ultra-low water contact angles and rolling angles. The coating is prepared through a novel combination of nano-silica and hexamethyldisilazane dilution and high-speed ball milling, followed by mixing with silicone resin and curing agent. The resulting super-hydrophobic solution is then applied through spin coating or dip coating and dried at specific temperatures to produce a durable, water-repelling surface with minimal surface energy.

Source

Hydrophobic membrane with integrated nanoparticle structure that maintains long-term water repellency through a novel embedding approach. The membrane comprises an adhesive layer on a coating object, nanoparticle structures embedded within this layer, and a hydrophobic outer layer. The embedded nanoparticles form a self-supporting structure that maintains water-repellency, while the adhesive layer provides mechanical attachment to the coating object. The outer hydrophobic layer protects the embedded structure from environmental degradation.

Source

Super water-repellent particles for continuous water repellency in composite materials, such as fibers and fabrics, that can be integrated into existing formulations. These particles incorporate a base particle with a surface-modified oxide layer, which provides water repellency through silane or phosphate-based bonding mechanisms. The particles can be incorporated into compositions at concentrations up to 10% by weight, allowing them to maintain their water-repellent properties even after material degradation.

Source