167 results about "Interfacial binding" patented technology

The invention belongs to the technical field of high-polymer alloy materials, and relates to a phosphate flame-retardant PC/ABS (polycarbonate/acrylonitrile-butadiene-styrene) alloy and a preparation method thereof. The alloy material is prepared from the following components in parts by weight: 55-75 parts of PC resin, 25-45 parts of ABS resin, 2-10 parts of compatilizer, 2-10 parts of toughening agent, 10-20 parts of flame retardant, 2-10 parts of inorganic filler, 0.1-0.5 part of antioxidant, 0.2-1.0 part of lubricant and 0.2-1.0 part of anti-dripping agent. The compatilizer, toughening agent and inorganic filler are utilized to enhance the interfacial binding force between the PC resin and ABS resin and the mechanical properties of the PC/ABS alloy. Besides, the nano silicon dioxide and other inorganic fillers added into the PC/ABS alloy can effectively perform the synergic flame-retardant function; and the anti-dripping agent in the formula can effectively inhibit the melt from dripping in the alloy material combustion process, thereby enhancing the flame retardancy of the material.

The invention discloses a plant fiber starch fully-biodegradable material and a preparation method thereof. The material is a product prepared by melting, blending and extruding thermoplastic corn starch, 50 to 60 mesh needlebush fibers, polylactic acid, inorganic stuffing, a crosslinking agent and a solubilizer in a twin-screw extruder. The thermoplastic corn starch is a product prepared by extruding the corn starch and the solubilizer which are blended according to a ratio of 40 to 70: 2 to 5 in a single screw extruder. In the invention, dioctyl maleate (MOD) is grafted onto the polylactic acid to perform a hydroxylation reaction of MOD-functionalized polylactic acid and thermoplastic starch, so that PLA and TPS interfaces are soluble mutually and the binding force of the interfaces is improved. The product has high water resistance and high mechanical properties. Compared with the conventional thermoplastic corn starch composition packing material, the stretching strength of the material of the invention is improved by 30 to 60 percent, the rigidity is increased by 15 to 35 percent, the water absorption is reduced by 13 to 40 percent, and the material is nontoxic and low in cost.

The present invention relates to a bone-repairing composite polymer material containing a ceramic ingredient and a preparation method thereof. The bone-repairing composite polymer material is composed of the calcium phosphate ceramic ingredient and a polybasic amino acid polymer ingredient, wherein, the mass ratio of the calcium phosphate ceramic ingredient is between 5 percent and 30 percent, and the rest is the polybasic amino acid polymer ingredient. Epsilon-aminocaproic acid is polymerized with at least two other types of amine acids to form the polybasic amino acid polymer ingredient, wherein, the mole ratio of the epsilon-aminocaproic acid in the polybasic amino acid polymer ingredient is between 50 percent and 90 percent, and the rest is the other amine acids including aminoacetic acid, lactamic acid, phenylalanine, lysine and proline. Under the protection of a inert gas, the materials, the amine acids and the calcium phosphate, are sufficiently and uniformly dispersed into water and then heated, so that various forms of waters can be removed from the materials, and finally, the materials are polymerized in two steps, respectively under a temperature between 200 DEG C and 220 DEG C and a temperature between 230 DEG C and 250 DEG C. The bone-repairing composite polymer material, which has excellent mechanical property, bioactivity, biocompatibility and controllable degradation property, can be perfectly combined with the interface of the bone tissue, and moreover, the degradation product is non-toxic and non-irritant.

The invention relates to a carbon/aluminum composite cathode foil for a solid aluminum electrolytic capacitor and a preparation method thereof. The technical scheme is as follows: carrying out proportioning according to that the weight ratio of conductive carbon black: dispersant: organic binder: solvent is 1: (0.0001-0.05): (0.01-1): (10-1000), firstly mixing the conductive carbon black, the dispersant and the organic binder, further adding the solvent, uniformly stirring and mixing, and preparing into slurry; uniformly coating the prepared slurry on the surface of an aluminum foil after pretreatment, then placing the aluminum foil coated with the slurry into a vacuum furnace, keeping the temperature for 1-40h under the conditions that the vacuum degree is 10-4-10-1Pa and the temperature is 300-660 DEG C, naturally cooling to room temperature in the vacuum furnace, and directly preparing the carbon/aluminum composite foil for the solid aluminum electrolytic capacitor or preparing the carbon/aluminum composite foil for the solid aluminum electrolytic capacitor after activation treatment. The process is simple and the preparation process is safe and environment-friendly; and the prepared product has the characteristics of high specific capacitance, good stability, high carbon/aluminum interfacial binding force and long service life.

The invention discloses a method for preparing a carbon/carbon composite MoSi2-ZrSiO4-SiC gradient complex outer coating. The MoSi2-ZrSiO4-SiC gradient complex outer coating is prepared with a cathode rotating microwave hydrothermal pulsed arc discharge deposition method; microwave presents self-heating and high efficiency in a reaction system, and generated partial high temperature and high pressure can effectively reduce the reaction activation energy of MoSi2, ZrSiO4 and SiC suspended particles, so that reaction of the suspended particles is more complete and sufficient in a pulsed arc discharge depotition process, and the coating with a dense structure is obtained. In addition, as a cathode rotates at a high speed, the defect that a coating with a dense and uniform structure can only be obtained through coating repeatedly with the traditional hydrothermal method is avoided, and the dense MoSi2-ZrSiO4-SiC gradient complex outer coating with microscopic cracks and different thicknesses can be obtained under controllable conditions. According to the MoSi2-ZrSiO4-SiC gradient complex outer coating prepared with the method, nano silicon carbide is diffused in the coating in a gradient manner, so that the defect is filled, the coating is densified, and the interfacial binding force is good.

The method of sputtering and depositing bioactive gradient hydroxyapatite/Ti layer on Ti alloy surface includes the following steps: mixing and ball milling material powder; hydrothermal reaction; stoving and grinding; mixing target material; cold pressing at 200-300 MPa to form; sintering; double-inclined target sputtering; and heat treatment of the sputtered film. The product has multilayer structure of Ti alloy matrix, compact transition TiO2 layer I with dispersed hydroxyapatite, TiO2 reinforced transition hydroxyapatite layer II, and porous hydroxyapatite layer. The present invention realizes the double gradient of both component and structure, and raises the interface binding strength effectively. The present invention has simple film preparing process and homogeneous film thickness, is suitable for surface activation of implant with complicated shape, and can prepare hard tissue for clinical need, especially as bearing bone repairing and substituting material.

The invention relates to core-shell type MOFs composite particles and a preparation method and application thereof. The preparation method of the core-shell type MOFs composite particles includes the following steps that a porous material and a molding promoter are mixed, wet granulating and calcining are carried out, and spherical cores are obtained; the cores are soaked with a binder solution, the cores are subjected to rolling pelleting in MOFs raw powder, and the core-shell type MOFs composite particles are obtained after drying. According to the core-shell type MOFs composite particles, compounding of core-shell materials is achieved in a mechanical bonding mode, the process is simple, the limitation that the varieties of core-shell materials are limited in a traditional in-situ chemical compounding mode is overcome, the application range is wide, interface bonding force is high, the yield is high, and industrial production is easy.

The invention relates to a dopamine modified hexagonal boron nitride/para-aramid nanofiber composite material and a preparation method thereof. The method includes: step 1, mixing a dopamine modifiedhexagonal boron nitride dispersion solution and a para-aramid nanofiber dispersion solution, and then performing ultrasonic treatment to obtain a mixed system A, wherein the mass of the dopamine modified hexagonal boron nitride accounts for 10%-40% of the total mass of the para-aramid nanofiber; and step 2, conducting vacuum-assisted filtration and hot press drying on the mixed system A to obtainthe dopamine modified hexagonal boron nitride/para-aramid nanofiber composite material. The method ensures the formation of certain microstructure in the composite material, and then enhances the insulation properties of the composite material, and improves the interfacial binding capacity of the dopamine modified hexagonal boron nitride and para-aramid nanofiber, strengthens the stress transfer between the two materials while guaranteeing good heat conduction, strengthens the mechanical strength of the composite material, and acquires the composite material with excellent insulating performance and heat-conducting properties.

The invention provides a tool provided with a diamond/silicon carbide composite coating. The tool provided with the diamond/silicon carbide composite coating comprises a base body, and a multi-layer coating structure, wherein the multi-layer coating structure is arranged on the base body. The multi-layer coating structure comprises the silicon carbide/diamond composite coating and a diamond coating. The silicon carbide/diamond composite coating and the diamond coating are sequentially and alternately arranged upwards from the surface of the base body to form the multi-layer coating structure; and the diamond coating is arranged on the top layer of the multi-layer coating structure. Each layer of the multi-layer coating structure can achieve continuous growth of the diamond phase, and accordingly the interface bonding strength between the layers is strengthened, the internal stress of the coatings can be reduced effectively, the adhesion between a thin film and the base body can be strengthened, and particularly the multi-layer coating structure is beneficial for resisting the strong shear stress generated in the cutting process of the tool. In addition, the overall fracture toughness in the thickness direction of the coatings can be strengthened. The invention also provides a production method of the tool provided with the diamond coating.

The invention relates to a method for producing diffusion couple with powders including the following steps: (1) powder material A is filled in a metal casing which do not diffuse or react with the contacted powder and then is pressed to form a compact; (2) the compact is punched by a die with a diameter which is 4-6 mm smaller than the inner diameter of the metal casing; (3) another powder material B is filled in the holes and then treated by compaction, sintering at a certain temperature, air-cooling to get a diffusion couple. The ring canning diffusion couple produced by compacting powder in the invention utilizes the high shrinkage of the outer powder in the sintering process to provide a interfacial binding force to the powder material of each layer in the jacket, thereby guaranteeing a full integration of the powder in each layer and providing a possibility to the preparation and the interface study of the layered composite powder materials.

The invention discloses a new/old cement concrete interfacial binding agent and a construction method for interfacial binding by using the same. The new/old cement concrete interfacial binding agent is divided into a pre-coating agent and a mortar binding agent, wherein the pre-coating agent is prepared from 1 part by weight of carboxybutylbenzene emulsion and 0-5 parts by weight of water; and the mortar binding agent is prepared from 1 part by weight of cement, 0.1-1 part by weight of carboxybutylbenzene emulsion, 0-3 parts by weight of sand and 0-0.3 part by weight of water. The construction method for interfacial binding by using the interfacial binding agent comprises the following steps: brushing or spraying the pre-coating agent on the surface of old cement concrete to form a pre-coating; after the surface of the pre-coating becomes dry, brushing the mortar binding agent on the surface of the pre-coating to form a mortar binding layer; and after the surface of the mortar bindinglayer becomes dry and before the cement in the mortar binding layer initially sets, casting new cement concrete which is bound with the old cement concrete. The invention obviously enhances the binding strength between new cement concrete and old cement concrete, is innoxious and harmless, and is convenient for use and construction.

The present invention provides a polyether-ether-ketone composite material with fluorine phosphorus lime, a preparation method and usage thereof. The preparation method of the composite material comprises the following steps of: melting and blending the raw material fluorine phosphorus lime and the polyether ether ketone, and then cooling, wherein the dosage of the fluorine phosphorus lime takes 10-50wt% of the total weight of the raw material, and the dosage of the polyether ether ketone takes 50-90% of the total weight of the raw material. The composite material is featured by good mechanical compatibility, reducing stress resistance, greatly increasing binding force between interfaces, reducing shearing stress, reducing tender movement and vertical displacement, and guaranteeing initial fixing of the composite material. Besides, the composite material has the advantages of good biological compatibility and biological activity, capable of promoting bone tissue growth, realizing biological fixing and being used as substitute of metal or ceramic bone substitute material.

The invention discloses bilayer hydrogel for promoting interfacial bonding through non-covalent action and a preparation method thereof. Two hydrogel sheets containing the same or different materialsform bilayer hydrogel with excellent interface bonding strength through a coordination bond of Fe<3+> and COO<-> in the hydrogel. The bilayer hydrogel assembly has excellent interface bonding strengththrough bonding of two layers under coordination bonds. The preparation method is free of complex and uncontrollable traditional processes for preparing bilayer hydrogel. The bilayer hydrogel has a good application prospect.

The invention relates to a nontoxic, environment-friendly, anticorrosive, imperious, waterproof, wear-resistant reinforcing material applicable to underground building engineering and a preparation method thereof. The reinforcing material comprises the following compositions: 5 to 10 weight portions of cation rubber powder, 5 to 8 weight portions of modified complex calcium, 15 to 30 weight portions of nanometer active SiO2 white carbon black, 1 to 5 weight portions of organic silicon modified nanometer bentonite, 0.1 to 3 weight portions of organic silicon reinforced compacting agent, 100 to300 weight portions of ground sulphoaluminate cement, 0.3 to 1.2 weight portions of dispersant, and 150 to 500 weight portions of quartz sand. The reinforcing material has good interfacial binding force, infiltration capacity and ultrastrong stability, and is a material with special use for the water resistance, impermeability, reinforcement and corrosion resistance of underground structures.

The invention relates to a titanium dioxide nanotube/hydroxyapatite composite coating used for medical porous titanium and a preparation method of the titanium dioxide nanotube/hydroxyapatite composite coating, belonging to the technical field of the improvement for medical titanium materials. According to the titanium dioxide nanotube/hydroxyapatite composite coating used for medical porous titanium, porous titanium is taken as a substrate, a composite coating is distributed on the inner surfaces and the outer surfaces of hole structures of porous titanium, and specifically, the composite coating is composed of a titanium dioxide nanotube and hydroxyapatite deposited on the titanium dioxide nanotube. The titanium dioxide nanotube/hydroxyapatite composite coating used for medical porous titanium is uniform and compact, and has strong interface bonding strength, as well as good biological activity and good compatibility. The invention further provides the preparation method of the composite coating which is characterized in that a preparation process is simple, the period is short, and the operability is strong.

The invention provides a method for preparing a carbon fiber brake lining, which belongs to the technical field of materials and solves the problems of poor interfacial binding force between a carbon fiber surface and a base body, and unreasonable material ratio of each part of the carbon fiber brake lining prepared by the conventional method for preparing the carbon fiber brake lining. The method for preparing the carbon fiber brake lining comprises the following steps of: A, pretreating carbon fibers; B, preparing resin solution; C, mixing powdery fillers; and D, forming. By the method for preparing the carbon fiber brake lining, the carbon fiber brake lining has low density, high braking ability, high environmental tolerance, low braking noise, high abrasion resistance, unchanged or slightly increased friction coefficient along with temperature rise, and high braking stability.

The invention discloses a method for measuring interface bonding energy of a heterojunction material based on molecular dynamics. The method comprises the following steps: 1) establishing a heterojunction material bubbling method model based on molecular dynamics simulation software Materials Studio; 2) performing molecular dynamics analogue simulation on the heterojunction bubbling model by usingmolecular dynamics simulation software Lamps; 3) observing the heterojunction interface from bubbling to debonding under the action of the probe so as to observe the occurrence mechanism of the bubbling process, and measuring the bubbling radius and the bubbling deflection in the bubbling process; 4) analyzing the mutual relationship among the bubbling radius, the bubbling deflection and the loading force to obtain the interface characteristics of the bubbling process, the bubbling radius and the bubbling deflection being in a linear relationship in the stable tearing stage, and the bubblingdeflection and the loading force being also in a linear relationship; and 5) calculating the interface energy W of the heterojunction material through related theories based on the obtained related data.

The invention discloses a method for improving the corrosion performance of the surface of a light alloy (including an aluminum alloy, a magnesium alloy and a titanium alloy) friction-stir welding joint. The method mainly comprises the steps that the surface of the joint being subjected to friction-stir welding is subjected to sand blasting treatment and cold spraying treatment, and then the coldspraying surface is subjected to further treatment through a heat treatment method; and on the one hand, residual stress caused by welding is eliminated, on the other hand, element diffusion occurs ata coating/joint interface, a transition layer is formed, interfacial binding force of a cold spraying coating is improved, and finally, a layer of dense protective layer is formed on the surface of the joint. The method for improving the corrosion performance of the surface of the light alloy friction-stir welding joint is easy to operate, convenient to use, reliable in performance, economical and practical, the corrosion performance of the surface of the friction-stir welding joint can be remarkably improved, and great significance to practical application of friction-stir welding is achieved.