34results about How to "Remarkable effect of strengthening and toughening" patented technology

The invention discloses high-strength and high-tenacity polypropylene composite materials. The high-strength and high-tenacity polypropylene composite materials solve the problems that existing polypropylene is poor in tenacity and poor in strength. The high-strength and high-tenacity polypropylene composite materials are formed by the following components, by weight, 35-75% of polypropylene, 10-40% of calcium carbonate, 8-25% of calcium sulfate whisker masterbatch, 0.1-2% of coupling agents, 2-8% of compatilizer, 0.3-4% of lubricating agents and 0.2-0.8% of antioxygen. The invention further provides a preparation method of the high-strength and high-tenacity polypropylene composite materials. According to the preparation method of the high-strength and high-tenacity polypropylene composite materials, through the mode that calcium sulfate whiskers are made into masterbatch, the calcium sulfate whisker masterbatch is added to plastics to carry out co-extrusion mixing with the plastics and the like, thus, compared with powdery whiskers, material preparation can be evener and controllable, the problem that material preparation of the calcium sulfate whiskers is difficult is solved, meanwhile, the calcium sulfate whiskers are made to have better dispersity in plastic substrate, and the surfaces of products are smoother.

The invention relates to a PVC montmorillonite/rare-earth stabilizing agent and a preparation method thereof, wherein, weight part components of the stabilizing agent comprise 100 of montmorillonite, 1 to 40 of organic rare-earth salts, 200 to 500 of dispersive medium, 1 to 10 of surface modifying agent, and 10 to 50 of auxiliary stabilizing agent. The organic rare-earth salts are prepared by organification of lanthanides inorganic rare-earth salt and long chain fatty acid. The long chain fatty acid is epoxy oleic acid, stearic acid, lauric acid or citric acid, taking up 5 percent to 40 percent of gross mass of the organic rare-earth salt. The long chain fatty acid takes up 20 percent to 40 percent of gross mass of the organic rare-earth salt. The invention overcomes defects of soft quality of traditional stabilizing agent and weak absorption ability of ultraviolet radiation and is provided with fine stripping performance and high reinforcing ability, and can effectively improve anti-attacking performance of PVC compound materials, realizes fine annealing strengthening and strengthening effects of nanometer padding and is provided fine barrier function to ultraviolet irradiation. The invention is suitable to PVC materials requiring high material mechanical strength.

The invention discloses a modified polypropylene material and a preparation method thereof. The modified polypropylene material is composed of 100 parts by weight of polypropylene resin, 0.5 to 5 parts by weight of a modifier, 0 to 15 parts by weight of a compatibilizer and 0.1 to 0.4 parts by weight of a composite antioxidant. The modified polypropylene material has good strengthening and toughening performances, a high thermal decomposition temperature and a high thermal deformation temperature.

The invention relates to a foamed aluminum material, in particular to high-impact-toughness foamed aluminum based on A356 aluminum alloy and a production process of the high-impact-toughness foamed aluminum. The production process comprises the steps that (1) 12-20 parts, by weight, of a foaming agent is ground and screened through a sieve with 100-180 meshes; (2) 100 parts, by weight, of A356 aluminum alloy ingots are crushed, ground into particles and then evenly mixed with 8-15 parts, by weight, of inorganic nano-whiskers and 10-12 parts, by weight, carbon nano-tubes, then a mixture is placed into a smelting furnace and completely molten in an inert gas atmosphere, afterwards, the foaming agent is sucked in to the smelting furnace under negative pressure, and a molten aluminum mixture is obtained after uniform mixing; (3) the molten aluminum mixture obtained in the step (2) is poured into a mold, the mold is then pushed into a foaming furnace, and heat preservation is conducted for1-2h at the temperature of 680-700 DEG C; and (4) the mold enters a cooling system to be cooled, and thus the foamed aluminum is obtained. According to the high-impact-toughness foamed aluminum basedon the A356 aluminum alloy and the production process of the high-impact-toughness foamed aluminum, the mixture of the inorganic nano-whiskers and the carbon nano-tubes is added in the forming processof the foamed aluminum, and thus the impact toughness of the aluminum is remarkably improved.

The invention discloses high-toughness heat-resistant corrosion-resistant pre-hardened plastic die steel. According to the die steel, the ratio of elements such as Mn, Si, Cr and Sr are properly increased on the basis of the element ratio of the conventional pre-hardened plastic die steel, and meanwhile, the dosage of the other alloy elements is controlled, so that the mechanical properties and processability of alloy are improved further on the basis of guaranteeing the mechanical properties and processability of the conventional plastic die steel, and the pre-hardened plastic die steel has good toughness and hardness, is small in internal stress, and low in possibility of abrasion and corrosion cracking and can be used for pouring of various types of plastic parts; an added rare earth oxide cladded nano tungsten carbide composite modifier has good wettability with alloy liquid, so that a modification effect is uniform and stable, the reinforcing and toughening effects are remarkable and the crystal phase of the alloy is compact and fine; the die steel is simple and efficient in preparation method and short in manufacturing period, can effectively improve the surface quality of plastic parts and has extremely high production application value.

The invention discloses modified gypsum-based whisker for reinforcing and toughening plastic. A core-shell structure taking calcium sulfate whisker as a core and an elastomer as an outer coating layer can be applied to functional modification of plastic. According to the modified gypsum-based whisker disclosed by the invention, the calcium sulfate whisker is pretreated first, and the problem that whisker loses water and is disintegrated in a high-temperature extrusion process is effectively solved; then an elastomer is generated by an in-situ emulsion polymerization technology, and the surface of the calcium sulfate whisker is coated to form a core/shell structure taking calcium sulfate hemihydrate whisker as a core and the elastomer as a shell; the core/shell structure is used for modifying a PVC (Polyvinyl Chloride) hard material, and a good effect of reinforcing and toughening is realized obviously.

The invention discloses an ultrahigh-temperature modified polymer well cementation fluid loss agent as well as a preparation method and application thereof, and belongs to the technical field of oil and gas well cementation admixtures. The ultrahigh-temperature modified polymer well cementation fluid loss agent is prepared from the following raw materials in parts by weight: 0.1 to 2 parts of graphene oxide, 0.1 to 1 part of initiator, 12 to 48 parts of 2-acrylamido-2-methylpropanesulfonic acid, 3 to 24 parts of unsaturated amide, 2 to 12 parts of unsaturated carboxylic acid and 130 to 170 parts of water. The fluid loss agent provided by the invention has the advantages of stable performance, high temperature resistance (30-240 DEG C), salt saturation resistance, excellent fluid loss performance, high adaptability, capability of remarkably improving mechanical properties (strengthening and toughening) of set cement and the like, and can meet the requirements of well cementation technologies under complex working conditions of deep wells, ultra-deep wells, complex natural gas wells, unconventional oil and gas wells, gas storage wells and the like.

The invention discloses high-temperature steam corrosion resistant pre-hardened plastic die steel. According to the die steel, the matching ratio of Mn, Gr, Zr and other elements is increased on the basis of the matching ratio of elements of the traditional pre-hardened plastic die steel, the use amount of other alloy elements is controlled, the corrosion resistance of hot steam resistant components of an alloy is further improved on the basis of the fact that the mechanical property and processability of the traditional plastic die steel are guaranteed, the possibility of fatigue fracture is low, the requirements for pouring various plastic components can be met, the organization structure of the die steel is further improved by virtue of the added rare earth oxide coated nano tungsten carbide composite modifier, the reinforcing and toughening effect is remarkable, the wetting property with molten metal is better, and the modification effect is uniform and stable. The preparation method of the die steel is simple and efficient, the manufacture period is short, the die steel is durable in use, the surface of a die block is smooth and free of cracks, and the processing quality of a plastic die is greatly improved.

The invention discloses a method for quickly preparing a nano-cellulose reinforced graphite material. The method comprise the following specific steps: 1) dispersing nano-cellulose in an ethanol aqueous solution, then adding high-purity ultra-fine graphite powder, and placing the mixture into an ultrasonic water bath for ultrasonic oscillation mixing to obtain precursor slurry; 2) pouring the precursor slurry into a Brinell funnel, and carrying out suction filtration to obtain a filter cake; 3) carrying out vacuum drying on the filter cake to prepare a blank body; 4) placing the raw material blank body into a graphite mold, placing the graphite mold in a direct current hot press sintering device, applying pressure and direct current voltage on two sides by electrodes, controlling the current to obtain an appropriate reaction temperature, and completing a reaction; and 5) carrying out cooling to obtain the nano-cellulose reinforced graphite material.

The invention discloses a preparation method of CFRP cloth constrained hybrid fiber lightweight aggregate concrete. The method provided by the invention combines a CFRP cloth, hybrid fibers and lightweight aggregate concrete, fully exerts lateral restraint ability of the CFRP and a good toughing effect of the hybrid fibers, and comprehensively improves the compressive strength, ductility and splitting strength of the concrete; and when the method is applied to a project, the quality, durability and service life of the project are greatly improved, and the method brings good economic and socialbenefits.

The invention discloses a high-elasticity lightweight ethylene-vinyl acetate copolymer based composite material having strong ultraviolet absorption and used for a cap eyebrow tongue core and a preparation method thereof, and relates to the technical field of composite materials. The high-elasticity lightweight ethylene-vinyl acetate copolymer based composite material is specifically prepared from the following components in percentage by mass: 70-98 wt% of EVA particles, 1.5-5 wt%of EVA foaming master batch, 0.05-25 wt%of BNNTs powder, 0.5-1.5 wt%of ZnO powder and 0.1-0.5 wt% of silicone oil, the composite material is foamed, loose and porous, the density is 0.3-0.6 g/cm<3>, the elastic recovery rate is not lower than 98%, the tensile strength is not lower than 3 MPa, and the ultraviolet absorptivity is not lower than 50%. According to the invention, an inorganic matrix and an organic substrate are highly fused, so that the material performance is stable and uniform; the composite material can keep light weight, high elasticity and high strength at the same time, and is more convenient to fold, store and carry without deformation or fracture as a cap eyebrow tongue core material; and the absorptivity of the composite material to ultraviolet rays is obviously enhanced.

The invention discloses crack-resistant and high-dimensional-stability prehardened plastic die steel. The proportions of elements, such as Mn, Cr, Cu and Sn, in the die steel are increased appropriately on the basis of the proportions of elements of conventional prehardened plastic die steel, moreover, the usages of other alloy elements are controlled, the mechanical property and machinability of the alloy are further improved on the basis of ensuring the mechanical property and machinability of the conventional plastic die steel, the die steel has good thermal conductivity and good surface lubricity, and is corrosion-resistant and anti-sticking, the surface is smooth and clean, and cannot be cracked easily, precision is high, the die steel is applicable to the casting of a variety of plastic parts, the wettability of an added rare earth oxide-coated nano-tungsten carbide compound modifier with the molten alloy is good, the structure of the die steel is refined, the toughening effect is enhanced remarkably, and the modification effect is uniform and stable; the preparation method of the die steel is simple and highly efficient, the manufacturing period is short, the surface quality of plastic parts is improved greatly, and the die steel has high production and application value.