3164 results about "Interface bonding" patented technology

The invention relates to a preparation method of a graphene modified nylon 6 fiber and belongs to the technical field of a functional fiber material. The preparation method comprises the following steps of: carrying out carboxylation and acylating chlorination treatment on graphene; then carrying out diamine treatment to obtain graphene oxide with an active amino on the surface; carrying out polymerization reaction by utilizing the aminated graphene and caprolactam through an initiator 6-aminocaproic acid to prepare a modified nylon 6 melt of the graphene; and carrying out spinning and stretching through a fusion and spinning process to obtain the graphene modified nylon 6 fiber. The technical scheme of the invention utilizes aminated graphene enhanced 6 to improve the interface bonding strength with a base resin, so as to be good for improving the whole performance of the graphene modified nylon 6 fiber. A fiber material prepared by the preparation method provided by the invention can be widely applied to the technical fields of aerospace, cars and ships, communication and transportation, mechano-electronics and the like.

The invention relates to a method for preparing graphene-reinforced polyacrylonitrile carbon fibers. The method comprises the following steps of: (1) preparing graphene or graphene oxide; (2) preparing a graphene/polyacrylonitrile spinning solution; (3) preparing graphene/polyacrylonitrile-based composite fibers; and (4) preparing graphene/polyacrylonitrile-based carbon. By the method, the dispersibility and interface bonding strength of the graphene oxide in a polymer matrix are effectively improved, and the comprehensive performance of the carbon fibers is further improved; the mechanical properties of the prepared carbon fibers are obviously improved, and the prepared carbon fibers can be used in the fields such as material reinforcement, electric conduction, anti-static electricity and heat conduction; and moreover, the preparation process is simple, easy to control and low in cost.

The invention relates to a method for manufacturing a foamed aluminum sandwich plate, which belongs to the field of porous foam metal and laminar composite materials. The method comprises the following steps of: uniformly mixing aluminum-silicon alloy powder prepared by an atomization method, and foaming agent titanium hydride powder and metal magnesium powder in a certain ratio; filling the powder into a thin-wall steel (or aluminum alloy) tube with one sealed end; sealing the other end of the tube after powder filling and preparing a rolled blank; rolling and compounding at a slow speed on a cold rolling mill; trimming an obtained composite plate and cutting a foamed preformed blank according to the size of a foaming mold; foaming the preformed blank in a steel mold in a limited way; adjusting foaming temperature and foaming time as required; and foaming at a high temperature for a short period of time to obtain a high-quality foamed aluminum sandwich plate with a uniform foam structure in a core layer, good interface bonding, high thickness accuracy and excellent plate profile. The method has the outstanding characteristics of low equipment requirement, high plate profile accuracy of a product, high three-point bending strength and the like and is advantaged technology suitable for mass industrial production of foamed aluminum sandwich structural materials.

The invention relates to a method for modifying aramid fiber by using carbon nano tubes, which comprises the following steps of: selecting an epoxy resin/ aramid fiber composite material as a research object, selecting the carbon nano tubes as a surface modification material, forming free amino groups in a certain ratio on the aramid fiber by a chemical modification method, soaking the aramid fiber into N-methylpyrrolidone solution (NMP), and reacting the solution and the surface carboxylation carbon nano tubes with the aid of ultrasonic, wherein part of carbon nano tubes enter the interior of Kevlar fiber, and the other part of carbon nano tubes are fixed on the surface of the fiber through amido bonds formed by the carbon nano tubes and amino, thus, a aramid fiber complex inside and outside which the carbon nano tubes are doped is formed. Single fiber tensile test results and single fiber pull-out test results show that the mechanical property of the modified aramid fiber and the interface bonding strength with the epoxy resin are improved.

Belonging to the field of heat preservation and thermal insulation materials, the invention puts forward an electrospun micro-nanofiber reinforced aerogel flexible thermal insulation material and its preparation method. The method takes electrospun micro-nanofiber as a reinforcement body, which is mixed with an SiO2 sol. A sol-gel process is employed to prepare an electrospun micro-nanofiber and aerogel composite thermal insulation material with a stable structure under normal temperature and pressure conditions. The method provided in the invention employs micro-nanoscale electrospun micro-nanofiber to reinforce the aerogel, so that the composite material can have better flexibility, interface bonding property and structural integrity. While the mechanical properties of the aerogel thermal insulation composite material are improved, the material also can maintain good thermal insulation performance.

The invention discloses a high-entropy alloy particle reinforced aluminum base composite material and a stirring casting preparation process thereof. The preparation process adopts mechanical alloying to prepare high-entropy alloy powder and screen to obtain high-entropy alloy particles; the high-entropy alloy particles are sealed by adopting an aluminum alloy pipe having the same material with a basal body; the aluminum alloy pipe weighed in a segmented manner is added in the molten basal body; the high-entropy alloy particles are dispersed by a stirring mode; and the high-entropy alloy particle reinforced aluminum base composite material is prepared by a casting process. The high-entropy alloy particles are 0.1-35%; aluminum alloys are 65-99.9%; and the sum of the two is 1. The high-entropy alloy particles in the structure of the prepared composite material are uniformly dispersed; the high-entropy alloy and aluminum alloy interface bonding compatibility is excellent; the strength and the toughness are excellent; the preparation process is simple; the powder has no need to be treated; the cost is low; the stability is good; and the composite material is suitable for large-batch production and standard production, and is excellent in promotion and application prospect.

The invention relates to a preparation method of polar solution-polymerized styrene-butadiene rubber with low gel rate. The method involves grafting polar monomers on solution-polymerized styrene-butadiene rubber by means of free radical solution method, so as to change the polarity and further improve the interface bonding force of styrene-butadiene rubber and carbon black or white carbon black, so that the wet-skid resistance, wear resistance and dynamic mechanical property of vulcanized rubber are improved and the rolling resistance is reduced. The polar monomers used comprise maleic anhydride, acrylic acid, acrylamide, N-vinyl pyrrolidone and the like. The grafting rate of modified styrene-butadiene rubber is 1-5% and the gel rate is 1-3%; and the rubber polarity changes obviously.

The invention relates to a carbon nano tube surface functionalization method. The method comprises the following steps of: performing surface coating treatment to a carbon nano tube through a dopamine hydrochloride biomimetic modification method, and performing surface functionalization grafting treatment to the dopamine-modified carbon nano tube through a second functionalization monomer. The method aims to improve the dispersibility of the carbon nano tube in a rubber matrix and the bonding performance of the carbon nano tube with a rubber interface, therefore, the problems of dispersing in the matrix and the poor interfacing bonding of the conventional non-modified carbon nano tube are solved; a series of problems such as damage to the carbon nano tube, environment pollution and complicated technical process, due to strong acid corrosion oxidation treatment in the conventional carbon nano tube surface modification method are prevented; and the technical process is simplified and the produced modified carbon tube is excellent in performance.

Conventional ion rechargeable batteries having an electrode layer on an electrolyte layer suffer from an impurity layer formed at the interface, degrading performance. Conventional batteries with no such impurity layer have a problem of weak interface bonding. In the present invention, in a baking process step after an electrode layer is laminated on an electrolyte layer, materials for an electrode layer and an electrolyte layer are selected such that an intermediate layer formed of a reaction product contributing to charging and discharging reactions is formed at the interface of the electrode layer and the electrolyte layer. In addition, a paste that an active material is mixed with a conductive material at a predetermined mixing ratio is used to form a positive electrode layer and a negative electrode layer. Reductions in electrode resistance and interface resistance and improvement of charging and discharging cycle characteristics are made possible.

The invention provides a preparation method for a vertically oriented boron nitride/high polymer insulating heat conducting material, and belongs to the field of radiating material preparation. The method comprises the following steps: first, modifying the surfaces of boron nitride nano-sheets by using dopamine or a silane coupling agent; then, coating the modified boron nitride nano-sheets between two layers of high polymers; next, pressing the three layers of materials into a thin film with a certain thickness by utilizing a hot pressing process; finally, laminating the thin film into a block body or winding the thin film into a cylinder. The preparation method is simple in process and suitable for batch production; the boron nitride cannot aggregate in the polymers, and a highly oriented heat conducting network is formed, and quick conducting of heat is facilitated. The surface of the boron nitride is modified; the interface bonding between the boron nitride and resin can be enhanced; the mechanical properties and the thermal properties are further improved. The boron nitride/high polymer composite material has high heat conductivity, excellent mechanical properties, and the electrical properties of high insulating and low dielectric loss, and has wide application in the field of electronics.

The invention relates to a gradient laminated porous scaffold based on microsphere selective laser sintering and a preparation method thereof. The scaffold is prepared by taking polymer microspheres and compound microspheres of high polymers and calcium-phosphate materials as sintering raw materials and carrying out selective laser sintering on the sintering raw materials, the contents of the calcium-phosphate materials in the scaffold are ascended in a layer by layer manner from the surface layer to the bottom layer of the scaffold, and bore diameters and porosities of the scaffold are gradually ascended. The preparation method comprises the following steps of: preparing calcium-phosphate materials/high polymer composite microspheres by a solvent evaporation method; designing a three-dimensional model of the gradient-laminated porous scaffold by computer modeling software; and realizing precise manufacturing of the gradient laminated porous scaffold by virtue of a selective laser sintering device through feeding controlling and single-layer manufacturing. The mutual communication and the gradient distribution of the scaffold are beneficial for nutrient transport and tissue penetration; and the contents of calcium-phosphate materials are in continuous gradient distribution in space, the disadvantage of interface bonding strength is effectively solved, and the biological functions of the scaffold in comprehensive defect repairing of cartilages and subchondral bones are beneficially exerted.

The invention discloses an isoprene rubber blend and its preparation method, the isoprene rubber blend comprises the following raw materials: 60-100 parts of isoprene rubber, 5-50 parts of trans-1,4-polyisoprene, 5-100 parts of reinforcing filler, 1-25 parts of in-situ grafted modification additive, 0-40 parts of cooperated rubber and 0-25 parts of first additive. Compared with the prior art, the in-situ grafted modification additive is performed chemical reaction with the reinforcing filler, and is simultaneously performed grafting reaction with function groups like double bond of a rubber molecular chain, so that the interface bonding strength between the organic polymer and the reinforcing filler as well as the dispersion level of the reinforcing filler in rubber can be substantially enhanced, and the fatigue resistance performance of the isoprene rubber blend is increased. The test results indicate that the isoprene rubber blend of the invention has favorable flex cracking resistance and excellent general mechanical performance.

The invention provides a graphene-coated glass fiber reinforced resin-based composite material. The preparation method comprises the following steps of dispersing graphene modified by a silane coupling agent in water to obtain a uniformly-dispersed aqueous dispersion, dipping glass fibers into the aqueous dispersion of the modified graphene so that compact and uniform graphene coatings are formed on surfaces of the glass fibers under the action of electrostatic adsorption, and carrying out compounding molding on the glass fibers with the graphene coatings and a resin matrix to obtain a composite material. The graphene coatings are arranged on the surfaces of the glass fibers so that the interaction area and interface bonding strength of the fibers and the matrix are improved, graphene dispersion is avoided and excellent composite material mechanical properties are obtained. The preparation method has simple processes, a low cost and good practicality.

The invention discloses a preparation method of a foam metal composite solder piece. According to the method, firstly, the surface of foam metal is treated, the surface of a foam metal matrix is coated with one or more layers of active metal with an electroplating or chemical plating process, annealing treatment is performed, the foam metal with an active metal plating layer is infiltrated into molten solder and taken out after filling is performed, foam metal enhanced low-melting-point composite solder is obtained, finally, calendaring machining is performed, metal solder foil with certain thickness is obtained, and the purposes of improving the strength and the welding performance of foam metal composite solder are achieved. The foam metal is used for enhancing Sn-based or Zn-based solder, and the applied active metal plating layer can improve the strength of the foam metal matrix to a certain extent and make up the influence of foam metal porosity on the strength of the foam metal. Besides, the active metal plating layer is also beneficial to filling of low-melting-point solder to the foam metal and relieves the unfavorable situation that tin and matrix metal are difficult to infiltrate and interface bonding is not firm.

A carbon fiber/graphene/epoxy resin prepreg and a method for preparing a carbon fiber composite material belong to the field of carbon fiber composite material preparation. The present invention carries out surface modification to the graphene prepared by adopting the improved Hummers method, and grafts NH on the graphene surface or edge ₂ , improve its dispersion in the resin matrix, and can effectively increase the interfacial adhesion between the micron carbon fiber and the epoxy resin matrix, reduce the existence of void defects, and then improve the mechanical properties of the epoxy resin matrix composite. The carbon fiber/graphene/epoxy resin composite material provided by the present invention has the best mechanical properties when the addition of graphene is 0.5wt%, the bending strength reaches 1525.4MPa, and the interlaminar shear strength reaches 91.14MPa, compared with the carbon fiber reinforced ring Oxygen resin composites improved by 15.41% and 14.14%, respectively. The invention has the characteristics of simple process, low solvent toxicity, suitability for industrialized production and the like.

The invention provides a two-dimensional slice material enhanced metal-based composite. According to the composite, metal is adopted as a base body, two-dimensional transition metal carbide or carbonitride, namely, MXenes is adopted as a reinforced phase, and MXenes particles are evenly dispersed in metal base body particles. Due to the fact that the MXenes material comprises a hollow carbon position and tends to metallicity, the metal base body has good wettability, and the interface bonding strength of the metal-based composite can be effectively improved. Therefore, the mechanical performance, wear resistance and other performance of the metal-based composite are enhanced. Meanwhile, the electronic coupling effect of the MXenes material and a metal base body interface is better, and the problem that in the prior art, the mechanical performance and corrosion resistance of the metal-based composite are improved through the reinforced phase, and meanwhile the heat conducting and electrical conducting performance of the metal-based composite is reduced can be avoided.

The invention relates to a high heat-conducting copper-based composite material and a preparation method thereof, belonging to the technical field of electronic packaging materials. The copper-based composite material consists of 50-80 percent by volume of electroplated diamond particles and 20-50 percent by volume of copper. The electroplated diamond particles and a caking agent are mixed according to the volume ratio of 1:1-4:1 and are produced into a diamond prefabricated part by using an injection forming process of the prefabricated part; and a copper matrix is directly placed on the diamond prefabricated part or is melt and poured on the diamond prefabricated part to be produced into the high heat-conducting copper-based composite material by using a pressure infiltration process. The copper-based composite material has higher heat conductivity ratio than that of an aluminum-based composite material; by plating the surface of diamond, the interface bonding of the matrix copper and the diamond can be improved and the interface heat resistance can be reduced; in addition, the material has low density and small thermal expansion coefficient and meets the requirement for light quality of packaging materials.

The invention relates to a method for performing amino functionalizing on a carbon fiber surface. The method comprises the steps that the fiber surface is coated with a copolymer coating containing a large amount of active amino by utilizing a Michael addition and Schiff base reaction of dopamine and poly-amino molecules through a one-step solution dipping method. Compared with the prior art, the method is simple in technology and mild in condition, does not damage a fiber body structure and can effectively increase active groups of the carbon fiber surface, and therefore the interface bonding property between fiber and resin is improved.

The invention discloses a high performance chlorinated polyethylene-epoxy resin anticorrosive coating system, which consists of a surface coating, an intermediate coating and a prime coating which are matched, wherein the surface coating is a high performance chlorinated polyethylene anticorrosive finish paint; the intermediate coating is a high performance chlorinated polyethylene/epoxy resin semi-interpenetrating network anticorrosive middle coating; and the prime coating is an epoxy resin micaceous iron oxide anti-corrosive primer. The preparation for the coating system comprises the preparation of surface coating and the intermediate coating; the coating construction is orderly multi-layer coating construction on the surface of a metal substrate; and finally the functionally graded anticorrosive coating is formed so as to effectively improve interface bonding force and adhesive force of various layers and fully exert the corrosion resistance of the high performance chlorinated polyethylene and the substrate bonding function of the epoxy resin; and the functionally graded anticorrosive coating has good corrosion resistance, such as the resistance to acid, alkali, saline water, gasoline and the like, and also has good physical and mechanical properties, such as shock resistance and flexibility, so the functionally graded anticorrosive coating has important application value in anticorrosive fields such as steel structures, bridges, metallurgy, chemical industry and the like, in particular heavy duty anticorrosive field of petrochemical industry.