9results about How to "Strong UV shielding effect" patented technology

The application discloses an anti-freezing early-strength cement-based plateau repairing material and a preparation method thereof, and belongs to the technical field of building materials. The application first takes zinc acetate dihydrate and thiourea as raw materials, and porous hollow ZnO particles are prepared through a hydrothermal reaction, then polyacrylic acid and anhydrous ethanol are used for dispersing and modifying the porous hollow ZnO particles to prepare PAA composite suspension liquid; the PAA composite suspension liquid is blended with a sulphate-aluminate cement-based slurry, and after being stirred and compounded at 80 DEG C, the mixture is shaped and maintained at a low temperature of 0-10 DEG C. The application builds an internal support structure through the porous hollow ZnO particles, and combines the dispersing and modifying effect of PAA, so that the material has excellent low-temperature early strength and freeze-thaw resistance, and can effectively avoid problems such as cracking, peeling and collapse of a repairing layer in a plateau and alpine environment, the process is controllable, the performance is stable, and the application is suitable for rapid repairing engineering of cement concrete structures in an extreme environment at a high altitude.

The application discloses a kind of high light-transmitting high-efficiency shielding ultraviolet biodegradable film and its preparation method and application.The high light-transmitting high-efficiency shielding ultraviolet biodegradable film provided by the application includes: biobased degradable film and lignin-tannin composite nanoparticles located in biobased degradable film.The high light-transmitting high-efficiency shielding ultraviolet biodegradable film provided by the application makes full use of the structural characteristics of lignin and tannin, and the composite particles generated by self-assembly of lignin and tannin, the π-π stacking of benzene ring in lignin structure and the rich phenolic hydroxyl in tannin structure can significantly enhance the ultraviolet shielding performance.In addition, tannin is lighter than lignin, which can significantly reduce the color of the film.Therefore, a biodegradable film with high transparency and high-efficiency ultraviolet shielding effect can be prepared at low addition amount.

The present application relates to the technical field of environment-friendly packaging materials, and particularly relates to a packaging coating material, a packaging coating and a preparation method thereof, according to weight parts, the packaging coating material comprises the following components: 20-50 parts of ethylene-acrylic acid copolymer; 30-60 parts of polyhydroxyalkanoate; 5-25 parts of modified lignin; and 0.5-3 parts of processing aid; the modified lignin is at least one of acetylated lignin, hydroxypropylated lignin and carboxylated lignin. The packaging coating material provided by the present application is fully biobased and degradable, and a small amount of ethylene-acrylic acid copolymer is used, so that the overall coating can be completely degraded in industrial composting, the prepared coating has the effects of waterproofing, oil-proofing, oxygen and moisture resistance and ultraviolet shielding, and has a balance between rigidity and toughness.

The application discloses a preparation method of aluminum-doped zinc oxide with excellent light stability and ultraviolet shielding performance and application thereof, and belongs to the technical field of functional materials, and comprises the following steps: (1) Zn(CH3COO)2 and Al(NO)3 are weighed, mixed, and then methanol is added thereto, and stirring is conducted until all the solids are dissolved to obtain a primary mixed solution for standby use; (2) a KOH methanol solution is prepared, stirring is conducted until all the KOH is dissolved, then the KOH methanol solution is added drop by drop into the primary mixed solution obtained in the step (1), and stirring is uniformly conducted to obtain a mixed solution for standby use; (3) the mixed solution obtained in the step (2) is subjected to water bath heating and stirring, and after completion, filtration, washing and drying are conducted, and finally the obtained solid is calcined to obtain the product. According to the application, the ion doping engineering is accurately carried out starting from the material body design, under the premise that the ultraviolet shielding performance is not damaged, the photo-generated carrier separation is actively and effectively inhibited, the recombination of the photo-generated carrier is promoted, the light stability is significantly improved, and the generation of ROS is reduced.

The application provides a solid glue coating, a preparation method and application thereof, and a preparation method of a surface-coated composite material, and belongs to the technical field of functional materials.The solid glue coating provided by the application comprises the following preparation raw materials in mass fractions: 50-95 parts of base resin powder, 1-20 parts of graphene oxide-nano titanium dioxide composite material, 1-20 parts of barium sulfate, 0.1-10 parts of a curing agent, 0.01-5 parts of a defoaming agent, and 0.01-5 parts of a wetting and leveling agent.The solid glue coating provided by the application is a high-thermal-conductivity and high-fluidity composite resin powder, can be coated on the inner surface of a mold in the forming stage of a composite material product, and is heated and solidified together with a composite material matrix, wherein the solid glue coating forms a uniform, smooth and dense coating on the surface of the composite material matrix, is perfectly fused with the composite material matrix, and thus an integrally-formed surface-coated composite material is obtained, and the operation is simple and environment-friendly.

The invention discloses a building curtain wall aluminum veneer with a weather-resistant color-retaining protective layer and a processing technology of the building curtain wall aluminum veneer, and relates to the technical field of high-performance aluminum veneers.According to the building curtain wall aluminum veneer with the weather-resistant color-retaining protective layer, by adding compound nanometer titania, the weather resistance of a coating is improved. And nitrogen doping treatment is further carried out, so that the ultraviolet-resistant effect of the aluminum veneer is improved. The preparation method comprises the following steps: firstly, coating the compounded nano titanium dioxide by using an aluminum-silicon composite coating agent, isolating direct contact between the compounded nano titanium dioxide and resin, passivating the surface activity, avoiding photocatalytic damage and improving the weather-proof effect. Then an amino modified fluorocarbon coating agent is used for secondary coating, a large number of amino groups on aminated chitosan can form hydrogen-bond coordinate bonds with hydroxyl groups on the surface of an aluminum-silicon coating, and the coating layer is prevented from falling off. And the fluorocarbon chain is grafted on the surface of the coating layer to form a hydrophobic interface, so that the hydrophobic effect of the aluminum veneer is improved.

The application relates to the technical field of material preparation, and discloses a preparation and application of a modified chitin nanocrystal-nano silver antibacterial hybrid material. The hybrid material is obtained by in-situ reduction of silver ions by taking aldehyde group functionalized chitin nanocrystals as a template agent and a reducing agent. The method provides a brand-new preparation method of aldehyde group functionalized chitin nanocrystals, is simple, compound structure is controllable, and is green and sustainable; meanwhile, the aldehyde group functionalized chitin nanocrystals are used as a template of nano silver, the reducibility of the surface aldehyde group is utilized to realize loading of the nano silver, and the modified chitin nanocrystal-nano silver antibacterial hybrid material is constructed; in addition, when the modified chitin nanocrystal-nano silver antibacterial hybrid material is used as a polylactic acid filler, the mechanical property, the antibacterial property and the ultraviolet resistance of the polylactic acid can be improved.

This invention relates to the field of polymer materials technology, specifically to photocurable organosilicon ionomers based on rigid-flexible networks, their preparation methods, and applications. The invention is prepared by UV curing of raw materials comprising the following components: acrylated polysiloxane; a multifunctional organosilicon crosslinking agent containing a rigid aromatic ring; an ionic liquid; and a photoinitiator. Through a synergistic crosslinking strategy combining rigidity and flexibility, this invention enables the ionomer to possess high tensile strength, high elongation at break, high transparency, and excellent UV shielding properties. The preparation process of this invention is simple and the curing is rapid. The resulting material has broad application prospects in flexible electronic devices, sun-protective and heat-insulating coatings, and other fields.

This invention provides a core-shell nanoparticle-modified epoxy resin and its preparation method, relating to the field of functional polymer materials technology. The method includes the following steps: preparing SiO2 nanoparticles using the Stöber method; in-situ polymerization of dopamine on the surface of the obtained SiO2 nanoparticles via molecular self-polymerization to prepare core-shell nanoparticles SiO2@PDA; using TDE-85 type epoxy resin as the matrix and core-shell nanoparticles SiO2@PDA as the modifier, preparing SiO2@PDA / EP modified epoxy resin by solution blending. The core-shell nanoparticles prepared by this invention not only have good interfacial bonding with the epoxy resin matrix but also exhibit a synergistic effect of scattering and absorbing ultraviolet light. The prepared SiO2@PDA / EP modified epoxy resin exhibits superior toughness, higher flexural strength, and excellent ultraviolet shielding performance.