4results about How to "High specific modulus" patented technology

The invention belongs to the technical field of coatings, and particularly relates to a coating for a galvanized plate and a preparation method thereof. According to the invention, molybdenum disulfide is modified by using graphene oxide and carbon nanotubes. Compared with an inert structure of a molybdenum disulfide nanosheet, a graphene oxide sheet layer contains a large number of oxygen-containing functional groups, and dispersion of the molybdenum disulfide nanosheet in the waterborne polyurethane coating can be effectively improved by modifying the molybdenum disulfide nanosheet through graphene oxide. The one-dimensional-structure carbon nanotubes added in the grafting reaction process of the graphene oxide and the modified molybdenum disulfide nanosheets can effectively prevent agglomeration of the nanosheet layers in the reaction process, so that uniform modification of the molybdenum disulfide nanosheets is ensured; and moreover, the carbon nanotubes have relatively high specific strength and specific modulus, and the added carbon nanotubes can form an interactive network with the graphene oxide and the molybdenum disulfide nanosheets, so that the mechanical property and the corrosion resistance of the waterborne polyurethane coating are greatly improved.

The invention belongs to the technical field of composite materials, and particularly relates to a titanium-based composite material of a bionic layered structure and a preparation method and application of the titanium-based composite material. The titanium-based composite material is prepared from the following chemical components in percentage by mass: 88.0%-92.0% of a Ti element, 6.2%-7.5% of a Cr element, 0.6%-0.9% of a B element, 0.6%-1.0% of a C element and inevitable impurities, and the total percentage is 100%. A material containing a Ti element, a material containing a Cr element, a material containing a C element and a material containing a B element are subjected to vacuum suspension smelting and casting of a (TiC + TiB) / Ti composite material cast ingot, the obtained (TiC + TiB) / Ti composite material cast ingot is subjected to homogenization, hot rolling and annealing composite process treatment, then the annealed (TiC + TiB) / Ti composite material cast ingot plate is used as a reinforcing layer, a TC4 titanium alloy plate is used as a toughness layer, and the TiC + TiB / Ti composite material cast ingot is subjected to heat treatment. Alternately laminating and placing; and finally, the high-toughness titanium-based composite material of the bionic layered structure is obtained through vacuum hot-pressing diffusion bonding. The high-strength and high-toughness titanium-based composite material has high strength and high plasticity at the same time.

This invention discloses a bamboo fiber, its preparation method, and a bamboo fiber wound hydrogen storage tank. The preparation method of the bamboo fiber includes the following steps: cutting natural bamboo into equal-length bamboo poles and pretreating them by soaking them in boiling water to remove water-soluble organic matter; mixing hydrogen peroxide, organic acid, and H2SO4 in a certain proportion to prepare a peroxyacid solution, wherein the concentration of hydrogen peroxide in the peroxyacid solution is 7-24 wt%, the concentration of organic acid is 15-55 wt%, and the concentration of H2SO4 is 0.5-3 wt%; soaking the pretreated bamboo poles in the peroxyacid solution at 50-60℃ for 12-20 hours to obtain bamboo fiber; then soaking the bamboo fiber in an alkaline solution for neutralization, and washing it after neutralization; vacuum drying the washed bamboo fiber and twisting it to extend its length to obtain long fiber; and applying microwave irradiation to the long fiber to obtain the final product.

The present application belongs to the technical field of paint, and particularly relates to a kind of paint for galvanized sheet and its preparation method.The present application uses graphene oxide, carbon nanotube to modify molybdenum disulfide.Compared with the inert structure of molybdenum disulfide nanosheet, graphene oxide sheet layer contains a large number of oxygen-containing functional groups, and the modification of molybdenum disulfide nanosheet by graphene oxide can effectively improve the dispersion of molybdenum disulfide nanosheet in water-based polyurethane paint.In the process of grafting reaction between graphene oxide and modified molybdenum disulfide nanosheet, the addition of one-dimensional structure carbon nanotube can effectively prevent the aggregation of nanosheet layer during the reaction process, thereby ensuring the uniform modification of molybdenum disulfide nanosheet;and, carbon nanotube has high specific strength and specific modulus, its addition can form an interactive network with graphene oxide and molybdenum disulfide nanosheet, greatly improving the mechanical properties and corrosion resistance of water-based polyurethane coating.