6results about How to "Control mechanical properties" patented technology

The present application belongs to the field of advanced coating and preparation, and particularly relates to a high-transparent and scratch-resistant multifunctional antistatic coating and a preparation method thereof. The present application provides a high-transparent and scratch-resistant antistatic coating, raw materials of the antistatic coating comprising fluorion-containing silsesquioxane monomer, functional monomer and catalyst; wherein the functional monomer is a crosslinking agent or an anti-crystallization agent. The coating obtained by the present application has a light transmittance of >98% (550 nm); a surface pencil hardness of greater than 9H, no scratches after more than 1000 times of steel wool rubbing; a surface resistivity of about 10 8 ~10 9 Ω / sq, and a fast electrostatic discharge rate.

This invention discloses a method for preparing and applying an antibacterial composite coating based on quaternized zinc oxide nanoparticles. The preparation method includes: grafting quaternary ammonium salt compounds onto the surface of zinc oxide nanoparticles to prepare synergistic antibacterial nanoparticles; modifying the substrate surface by co-deposition of dopamine and polyethyleneimine to introduce active functional groups; and spraying or dipping the quaternized zinc oxide nanoparticles onto the modified substrate surface to obtain the antibacterial composite coating. This novel antibacterial material preparation scheme can integrate the advantages of zinc oxide nanoparticles and quaternary ammonium salts, while solving key technical problems such as nanoparticle aggregation, weak interfacial bonding, and limited antibacterial efficiency. It is of great significance for promoting the upgrading of hygiene and safety in the fields of medicine, food, and building materials.

The application discloses a 3D-printable all-inorganic perovskite flexible light-emitting gel and a preparation method and application thereof, and relates to the technical field of perovskite. The method comprises the following steps: dissolving cesium bromide in water to obtain a cesium bromide aqueous solution; adding photo-curing precursor components into the cesium bromide aqueous solution in a certain proportion, and stirring uniformly to obtain a photo-curing precursor mixed solution; obtaining a photo-curing composite hydrogel; obtaining a flexible high polymer gel containing cesium bromide; and performing a spontaneous crystallization reaction, and then performing heat treatment on the gel to remove residual solvents. The perovskite precursors with large solubility difference are introduced into the photo-curing base material in two steps, respectively, so that the compatibility problem of the perovskite and the flexible base material precursor is solved.

This invention discloses a self-healing elastomer, belonging to the field of new materials technology. The invention utilizes a one-pot method to prepare the elastomer using hydroxyl-terminated prepolymers, isocyanates, chain extenders, metal ions, and crosslinking agents. The elastomer contains a rich multi-dynamic network of H bonds, metal coordination bonds, and disulfide bonds, resulting in a self-healing elastomer. This invention reduces the difficulty of preparation and improves the excellent properties of polyurethane elastomers, such as heat resistance and solvent resistance, through crosslinking. Simultaneously, it can achieve rapid self-healing at a low temperature of -10℃ and exhibits good mechanical properties.

The invention provides a quercetin-based polyurethane material, a novel metal-ligand coordination cross-linked polyurethane material and a preparation method and application of the quercetin-based polyurethane material and belongs to the technical field of polyurethane materials, and the structural formula of the novel metal-ligand coordination cross-linked polyurethane material is shown in the specification. The preparation method comprises the following steps: adding diisocyanate into a completely molten dihydric alcohol oligomer system, and reacting to obtain an isocyanate-terminated prepolymer; adding a quercetin solution into the prepolymer system, and reacting to obtain a quercetin-based polyurethane solution; and adding a metal ion solution into the quercetin-based polyurethane solution system, and volatilizing the solvent after the reaction to obtain the novel metal-ligand coordination cross-linked polyurethane material. According to the invention, oligomer dihydric alcohol is taken as a soft segment, quercetin is taken as a chain extender, and a polyurethane material containing quercetin in a main chain and a metal-ligand coordinated cross-linked polyurethane material are synthesized by a one-pot method; wherein the metal ions are used as cross-linking points to be connected with a polyurethane main chain, so that a more flexible network structure is formed.

The application discloses a preparation method of a self-reinforced and self-repairing polyurethane film suitable for an ocean extreme environment, and the preparation steps are as follows: reacting diisocyanate, high-molecular dihydric alcohol, 1,1'-ferrocene dimethyl alcohol, dibutyl tin dilaurate and a small-molecule chain extender to prepare a polyurethane with a force response function; reacting diisocyanate, high-molecular dihydric alcohol, a chain extender containing a carboxyl group or a catechol group and a small-molecule chain extender to prepare a polyurethane with a metal ion coordination function; and blending the polyurethane with the force response function and the polyurethane with the metal ion coordination function at a mass ratio of 1:1 to 1:2 to prepare the self-reinforced and self-repairing polyurethane film suitable for the ocean extreme environment. The mechanical properties and the self-repairing properties of the polyurethane film can be regulated by adjusting the amount of the chain extender containing the carboxyl group or the catechol group, and the mechanical properties of the polyurethane film prepared by the application can be improved in a self-crosslinking reaction process caused by repeated mechanical force.