4results about How to "Excellent physical shielding effect" patented technology

The invention discloses a core-shell structure hybrid particle, an anti-corrosion wear-resistant coating and a preparation method and application of the core-shell structure hybrid particle and the anti-corrosion wear-resistant coating. The core-shell structure hybrid particle comprises a polytetrafluoroethylene particle serving as a core, an organic polymer transition layer wrapping the surface of the core and a two-dimensional lamellar material layer arranged on the surface of the organic polymer transition layer in a stacked mode. Wherein the two-dimensional lamellar material layer is formed by wrapping a two-dimensional lamellar material on the surface of the organic polymer transition layer at least through hydrogen-bond interaction. The core-shell structure hybrid particles in the anticorrosive wear-resistant coating prepared by the invention can effectively fill the micropore defect in the rapid curing process of the water-based resin, improve the density and physical shielding effect of the coating, and enhance the corrosion resistance of the coating in the deep sea environment; meanwhile, by adding the core-shell structure hybrid particles, the friction coefficient and the wear rate of the coating can be effectively reduced, and the tribological performance of the coating is improved.

The invention discloses an environment-friendly stainless steel passivation liquid and a preparation method and application thereof. The invention firstly uses an epoxy silane coupling agent to treat nano silicon dioxide, and then grafts carboxymethyl chitosan on the surface of the nano silicon dioxide through the cross-linking effect of epoxy groups. The carboxymethyl chitosan has good film-forming performance and forms a film layer on the surface of a metal material. At the same time, hydroxyl groups and amino groups in the carboxymethyl chitosan can react chemically with epoxy groups in an epoxy resin, so that the film layer is more compact and prevents corrosive media from passing through the film layer, thereby improving the corrosion resistance of the metal material. Then, acrylamide and allyloxy polyoxyethylene ether are used to modify sepiolite powder, so that the sepiolite powder can be better dispersed in the epoxy resin. At the same time, the polymer contains amide groups, which can form chemical bonds with hydroxyl groups and amino groups in the carboxymethyl chitosan and epoxy groups in the epoxy resin, further enhancing the physical shielding effect and protecting the metal substrate.

This invention belongs to the field of anti-corrosion coating technology and discloses a thin-layer high-barrier heavy-duty anti-corrosion coating and its preparation method. The coating comprises component A and component B, wherein component A is composed of fluorocarbon-polyurethane hybrid resin, glass flakes, cerium-doped carbon nitride, additives, and solvent, and component B is a curing agent and a diluent. The fluorocarbon-polyurethane hybrid resin is prepared by reacting fluorocarbon resin with a mixed isocyanate, which is a compound of aliphatic and aromatic isocyanates; the cerium-doped carbon nitride is obtained by calcining urea followed by secondary calcination with cerium ammonium nitrate. This invention, through resin hybrid design and synergistic use of functional fillers, achieves excellent acid and alkali corrosion resistance and long-term barrier effect under thin-layer conditions. The coating maintains surface integrity and stable adhesion even after immersion in corrosive media, and is easy to apply and low in cost, making it suitable for steel structure protection in harsh corrosive environments.

This invention belongs to the field of materials preparation and discloses a method for preparing plate-like zinc phosphate, comprising the following steps: (1) adding an inducing agent to a phosphoric acid solution; (2) adding the mixed solution from step (1) to a zinc oxide slurry, stirring the mixture at 60-90°C, and filtering and drying the reaction product after the reaction to obtain plate-like zinc phosphate. This invention directly controls the growth morphology of plate-like crystals through an aqueous synthesis reaction, eliminating the need for ultrafine grinding, reducing process flow and equipment investment, lowering energy consumption per unit product, and meeting the requirements of green manufacturing.