8results about How to "No agglomeration" patented technology

The invention relates to the technical field of PVB heat-insulating films, in particular to a PVB heat-insulating film based on indium tin oxide and bronze cesium tungsten compounding and a preparation method thereof.The PVB heat-insulating film is prepared from, by weight, 80-120 parts of PVB resin, 20-50 parts of oily plasticizer, 0.1-2.0 parts of silane coupling agent, 0.1-1.0 part of antioxidant, 0.1-1.0 part of ultraviolet light absorber, 1-5 parts of polyethylene glycol derivative and 1-5 parts of compound dispersion slurry, the weight ratio of the indium tin oxide powder to the bronze cesium tungsten powder in the compound dispersed slurry is (5: 5)-(7: 3). According to the PVB heat-insulating film based on indium tin oxide and cesium tungsten bronze compounding and the preparation method, the prepared PVB heat-insulating film has high visible light transmittance and excellent near-infrared light rejection rate, meanwhile, the Faraday cage effect can be effectively avoided, and the signal shielding problem is avoided.

The application discloses a mural reinforcing protective agent and a preparation method and application thereof, belongs to the technical field of cultural relic restoration, and can solve the technical problems that existing mural reinforcing materials cannot reinforce the lower layer structure of ancient murals and are prone to being attached to the surface of murals to cause the whitening of the surface pigments. The mural reinforcing protective agent comprises a bacterial cellulose carrier and Ba(OH)2 nanoparticles loaded on the bacterial cellulose carrier in situ. The application plays a reinforcing role on the lower layer structure of murals, realizes deep reinforcement of ancient murals, improves the protection effect, stability and durability, and the surface of the mural will not be whitened.

This invention relates to a method for modifying a methane combustion catalyst with Al2O3 and controlling Ce loading. The method comprises: dissolving cerium nitrate hexahydrate in deionized water with the same saturated adsorbed water volume as the pretreated Al2O3 support to obtain a cerium nitrate hexahydrate impregnation solution; uniformly adding the cerium nitrate hexahydrate impregnation solution dropwise onto the pretreated Al2O3 support powder to completely wet it; and then allowing it to stand, dry, and calcining to obtain a CeO2-Al2O3 catalyst support material; dissolving palladium nitrate in deionized water with the same saturated adsorbed water volume as the pretreated Al2O3 support to obtain a palladium nitrate impregnation solution; and adding the palladium nitrate impregnation solution dropwise onto the CeO2-Al2O3 catalyst support material to completely wet it; and then allowing it to stand, dry, and calcining to obtain a Pd-CeO2-Al2O3 catalyst.

This invention discloses a nano-haloysite-based electrolyte filling material and its preparation and application methods. The preparation method includes: mixing and grinding nano-haloysite with graphite; mixing the resulting halloysite-graphite mixture with saturated saline solution and polyacrylamide at low and high speeds, adjusting the pH of the resulting mixture to 6.5–7.5, and then subjecting it to ultrasonic treatment to obtain the electrolyte filling material. The electrolyte filling material obtained by this invention is a stable dispersion system. Compared with kaolinite fillers, its stability is significantly improved, and it does not exhibit stratification over a longer application period. The resulting electrode has a more stable potential difference.

The application discloses a kind of aluminum alloy for selective laser melting forming and preparation method thereof, belong to aluminum alloy material and additive manufacturing technical field.The aluminum alloy of the present application comprises by mass percentage: Mg 3.8~5.2%, Zn 3.8~5.2%, Cu 0.5~1.0%, Ti 0.4~1.6%, C 0.1~0.4%, the balance is Al.Its preparation method includes: using Al-5Ti-1C intermediate alloy and other raw materials are melted into ingot, is atomized by vacuum, then it is printed by selective laser melting, finally it is solid solution and aging treatment.The application is introduced by Al-5Ti-1C intermediate alloy by component control and by submicron level TiC particle cooperates grain refinement, inhibits thermal crack, the yield strength of obtained alloy is greater than or equal to 480MPa, tensile strength is greater than or equal to 550MPa, elongation is greater than or equal to 10%, low in cost, suitable for additive manufacturing.

This invention belongs to the field of ultra-high molecular weight polyethylene (UHMWPE) fiber modification technology, specifically relating to a hydrocarbon-linked boron nitride-modified UHMWPE fiber with high creep resistance and its preparation method. The fiber comprises an UHMWPE matrix and hydrocarbon-linked grafted boron nitride dispersed therein; the hydrocarbon-linked grafted boron nitride is obtained by grafting ω-heptadecenylphosphonic acid onto the surface of hydroxylated nano-hexagonal boron nitride, exhibiting a dual physical crosslinking mechanism. The preparation method includes preparing hydroxylated nano-hexagonal boron nitride, preparing hydrocarbon-linked grafted boron nitride, and preparing high creep-resistant UHMWPE fiber. The method of this invention can significantly improve the creep resistance of the fiber, exhibiting mechanical stability, with a creep rate ≤1.5% after 1000 hours of stress loading at 200 MPa at room temperature. This invention features a simple process, strong adaptability, mild and controllable process parameters, low equipment modification costs, and is easy to industrialize.

The invention discloses a method for preparing spherical nano barium fluoride, spherical barium fluoride smaller than 5nm is synthesized by a microemulsion reaction method, and the microemulsion is temperature-responsive and does not contain a surfactant. Controllable preparation of the spherical barium fluoride with the ultra-small size smaller than 5 nm under the surfactant-free condition is achieved for the first time. A ternary surfactant-free microemulsion system composed of diethylene glycol monohexyl ether, octane and water is constructed, the amphiphilic solvent characteristic of diethylene glycol monohexyl ether is used for replacing a traditional surfactant, and the dependence of an existing template method on the surfactant is successfully broken through. The particle size of the obtained BaF2 product is only smaller than 5 nm and enters a strong quantum confinement scale range, and the preparation blank of a barium fluoride material in the field of sub-5-nm ultra-small solid spheres is filled.

The application discloses a preparation method of spherical alumina powder with good dispersity, and comprises the following steps: dissolving aluminum nitrate nonahydrate and ammonium sulfate in deionized water, adding sodium hydroxide, polysiloxane-polyester sulfonate dispersant and urea in sequence, stirring, and configuring into a reaction solution; then, the reaction solution is subjected to temperature increasing reaction under stirring at a certain temperature increasing rate; after the reaction is completed, the spherical alumina precursor is prepared through filtering, washing and drying treatment; finally, the prepared spherical alumina precursor is subjected to calcination according to a certain calcination process, and the spherical alumina is obtained after cooling. The spherical alumina prepared by the method has the advantages of smooth surface, good dispersity, controllable particle size (D50 is about 1-8 microns), easily obtained raw materials, simple process, low requirement on production equipment and easy industrialization.