31results about How to "High temperature high strength" patented technology

The invention relates to a high-temperature resistant and high-toughness epoxy resin adhesive and a preparation method thereof. With the use of common epoxy resin, a toughening agent, an acrylic oligomer, a modified polyamide curing agent and the like, the epoxy resin adhesive has good toughness, and excellent breaking elongation and elasticity modulus, and can maintain higher shear strength at high temperature. The preparation method is simple, the process can be regulated and controlled easily, the cost is low, and the high-temperature resistant and high-toughness epoxy resin adhesive can be cured at room temperature, is particularly applicable to fragile material adhering, and is the high-performance adhesive with both high strength and high elastoplasticity.

The invention discloses a micro spherical hollow structure nickel-based hydrogenation catalyst as well as a preparation method thereof in the technical field of catalyst preparation. The method comprises the following steps: controlling the morphology of an aluminum raw material serving as a mold plate which is consumed gradually along with the reaction, inducing hydrotalcite assembly to obtain a micro spherical hollow hydrotalcite assembly body, and carrying out in-situ reduction to obtain the micro spherical hollow nickel-based catalyst. The catalyst material obtained by preparation has high specific surface area, and the internal empty cavity structure and the abundant open-framework structures have great actual application value. The catalyst has relatively high hydrogenation activity and selectivity when being used for catalyzing dimethyl terephthalate (DMT) benzene ring hydrogenation in the reaction for preparing dimethyl 1, 4-cyclohexanedicarboxylate.

The present invention discloses a high temperature resistance high heat conduction PPS/PPO alloy and a preparation method thereof, and belongs to the technical field of polymer materials. The PPS/PPO alloy comprises the following raw materials, by weight, 20-50% of PPS, 8-10% of PPO, 5-8% of a toughening compatibilizing agent, 5-48% of a heat conduction agent, 20-30% of carbon fibers, 0.2-0.5% of an antioxidant, and 0.8-1.5% of a processing aid. The PPS/PPO alloy preparation method comprises: uniformly stirring the heat conduction agent, carrying out stirring mixing on the heat conduction agent and other raw materials (except the carbon fibers), adding the obtained mixture to a zone 1 of a twin-screw extruder (divided into 10 zones), adding the carbon fibers to a zone 10, and carrying out extrusion granulation, drying and injection molding to obtain the product. The high temperature resistance high heat conduction PPS/PPO alloy has characteristics of high heat conduction coefficient, high impact strength, good processing property and the like.

The invention relates to a high temperature and high pressure direct synthesis method of cubic boron nitride in a titanium nitride plated coating, relating to a high temperature and high pressure synthesis method of an ultra-hard material. The method takes hexagonal boron nitride as a raw material, an alkali metal nitride or alkaline-earth metal nitride or boron nitride as a catalyst, and metallic titanium powder or a metallic titanium compound as an additive. The method comprises the following steps of: mixing the hexagonal boron nitride and the alkali metal nitride or the alkaline-earth metal nitride or the boron nitride according to a weight proportion of 1:(0.1-0.3), adding the metallic titanium powder or the metallic titanium compound accounting for 0.5wt%-10wt% of the total mixture, and synthesizing a cubic boron nitride product with the titanium nitride plated coating at a high temperature and a high pressure, wherein the synthesis temperature is 1000 to 1800 DEG C, the synthesis pressure is 4.0-6.0 GPa, and the temperature and the pressure last for 3-15 minutes. The cubic boron nitride provided by the invention has the characteristics of high hardness, good abrasion resistance, good high temperature resistance, good tenacity, thermal conduction and electrical conduction, and is particularly suitable for preparation of polycrystalline cubic boron nitride products and tools.

The invention relates to a peanut hull graphene compound aerogel oil absorption material and a preparation method thereof. The compound aerogel is prepared by using peanut hulls and graphene oxide asraw materials and thiourea as crosslinker, graphene slices are separated through gas generated by thiourea under high temperature and high pressure and form a three-dimensional porous structure with the peanut hulls. According to the preparation method, graphene oxide slices are separated by utilizing the gas generated by thiourea under high temperature and high pressure through a hydrothermal method; and the surface of the graphene slices are modified with functional groups, so that the graphene slices can be better combined with the peanut hull powder and form the three-dimensional porous network structure due to interaction. The three-dimensional porous network structure has large toughness and high strength, cannot be easily broken even being saturated and adsorbed, the graphene is further reamed by the peanut hulls, the specific surface area of a material is increased, and the oil absorption performance is greatly reinforced.

The invention discloses a PPS (Poly-Phenylene Snlfide)/PPO (Poly-Phenylene Oxide)/PA (Poly-Amide) alloy with high temperature resistance and high heat conductivity and a preparation method of the PPS/PPO/PA alloy, which belongs to the technical field of high molecular materials. The PPS/PPO/PA alloy is prepared from PPS, PPO, PA, a toughening compatilizer, a heat conduction agent, carbon fibers, an antioxidant and processing additives. The preparation method of the PPS/PPO/PA alloy comprises the following steps: firstly coupling main components of the heat conduction agent, jointly stirring and mixing the main components of the heat conduction agent with other raw materials except the carbon fibers, adding the mixed materials into a zone 1 of total 10 zones of a twin-screw extruder, adding the granulated carbon fibers after being subjected to surface treatment into a zone 10, extruding, granulating, drying and carrying out injection molding to obtain the PPS/PPO/PA alloy. The PPS/PPO/PA alloy with high temperature resistance and high heat conductivity is high in heat conduction coefficient and has the characteristics of high strength, high impact, good processing property and the like.

The invention relates to a warp knitting spacer fabric composite sole. A production method of the sole is characterized by performing, with general polyester monofilaments and high-tenacity polyester monofilaments as raw materials, warp knitting by using a two-needle bar warp knitting machine based on a three-dimensional screen cloth warp knitting method to prepare elastic screen cloth through warping, warp knitting and after-finishing. Based on the method of three-dimensional warp knitting of warp knitting spacer fabric characterized by integral forming, a sole has excellent structural strength, elasticity and light weight; the warp knitting spacer fabric composite sole has excellent moisture conductivity and breathability performance of three-dimensional fabric; the polyester filaments with an antibacterial function and high tenacity are used as the screen cloth materials for the sole, so that the sole has the functions of bacteria resistance and bacteriostasis; a multi-step chain extension and tackifying process can be performed by using a tackifying chain extender with epoxy functional groups, so that the problems that conventional powdery tackifying is low in efficiency and micro-molecules are hard to remove in a tackifying process are solved. The prepared warp knitting spacer fabric composite sole has a broad application prospect in the field of shoe materials.

The invention relates to a photo-thermal dual-curable adhesive. The adhesive of the invention is prepared from the following raw materials in percentage by weight: 15-40% of modified resin with an acrylate group and an isocyanate group on one molecule, 10-30% of four-functionality special epoxy resin, 10-30% of an acrylate monomer, 3-10% of an acrylate monomer of blocked isocyanate, 1-5% of a free radical photoinitiator, 5-17% of special thiol and 3-10% of a latent amine curing agent. The photo-thermal dual-curable adhesive prepared by the invention has better storage stability, high bonding strength, better high-temperature and high-humidity resistance and wide application range.

The invention relates to a polyether-ether-ketone/polyether sulfone composite fiber and a preparation method thereof, and belongs to the technical field of special organic fibers. The composite fiberis mainly prepared from, by mass, 1-99 parts of polyether-ether-ketone and 1-99 parts of polyether sulfone. The polyether-ether-ketone and the polyether sulfone are put into a ball mill mixing machinefor stirring and mixing, and then extruded, cut off and granulated by a screw extruder after drying; the mixed granules are drie, fed into a high-temperature spinning machine for melting and plasticizing, then conveyed by a metering pump into a filter system and a component system, and extruded by a multihole spinneret plate to form polyether-ether-ketone/polyether sulfone fiber melt slivers; filaments obtained after stretching and setting are introduced by a negative-pressure filament suction gun into a winding system and then wound into a filament cylinder, and the finished product is obtained. According to the polyether-ether-ketone/polyether sulfone composite fiber and the preparation method thereof, the technology is simple, the production efficiency is high, the fiber prepared by using the method is good in performance, and various indexes can meet subsequent weaving requirements. The polyether-ether-ketone is blended with the polyether sulfone, the cost of the blend fiber is effectively reduced, and great support is provided for market-oriented popularization of polyaryletherketone fibers.

The invention relates to a lightning-protection reflection type high-strength dual-waveband directional antenna. The lightning-protection reflection type high-strength dual-waveband directional antenna comprises a metallic reflection cavity, wherein microstrip plates are arranged in the metallic reflection cavity; a multiplexer is arranged on the microstrip plates; a coaxial cable is connected onto a main circuit of the multiplexer; a first radiation oscillator and a second radiation oscillator are respectively connected onto a first branch and a second branch of the multiplexer; a solid antenna housing covers on the first radiation oscillator and the second radiation oscillator; the solid antenna housing is provided with a lightning-protection reflection oscillator; the lightning-protection reflection oscillator is located at the same side of the first radiation oscillator and the second radiation oscillator; the first radiation oscillator and the second radiation oscillator adopt hollow sail-shaped unipolar metal oscillators; the hollow sail-shaped unipolar metal oscillators consist of first metallic straight strips, second metallic straight strips and arc-shaped metallic strips; the first metallic straight strips, the second metallic straight strips and the arc-shaped metallic strips are connected with one another in an end-to-end manner; angles formed by the first metallic straight strips, the second metallic straight strips and the arc-shaped metallic strips are acute angles; and metal blocks are arranged or directly welded on the hollow sail-shaped unipolar metal oscillators so as to form an inner-and-outer embattlement type structure.

The invention relates to superfine polyester carpet yarn belonging to the technical field of carpet yarn. The invention is characterized that the superfine polyester carpet yarn is formed by doubling and twisting 346dtex polyester low-elastic yarn or 2267dte polyester low-elastic yarn, adopts a first technical scheme by once doubling three pieces of 346dtex polyester low-elastic yarn into one, twisting S, twice doubling two pieces of twisted yarn into one and twisting Z, and a second technical scheme by doubling three pieces of 2267dte polyester low-elastic yarn into one, twisting S, twice doubling two pieces of twisted yarn into one and twisting Z. The invention needs to dye at high temperature and pressure, but has less production procedures, easy operation, high spinning yield rate and low production cost, much stronger strength than carpet yarn produced by other short fibers and good resilience; and a textured carpet has soft foot feeling and good crease resistance and is easy to clean.