727 results about "Interface bond" patented technology

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 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.

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 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.

The invention discloses a thermal-oxidizing-aging resisting polypropylene composite. The thermal-oxidizing-aging resisting polypropylene composite comprises the following components in percentage by weight: 30%-85% of polypropylene, 0-10% of flexibilizer, 2%-10% of compatilizer, 10%-40% of filling agent, 0.1%-0.5% of nucleating agent, 1%-10% of load type functional agent and 0.2%-1.0% of processing agent. Due to the nucleating agent, the polypropylene spherocrystal is refined, the crystallization is uniform and regular and the degree of crystallinity is increased, so that the lattice defect of a substrate is avoided effectively, and the oxygen is prevented from dispersing to the inner part from the surface of the composite freely; due to the compatilizer, the interface bonding force of the polypropylene and the filling agent is improved, so that two phase interfaces are combined tightly, the and the oxygen is prevented from dispersing to the inner part from the surface of the composite freely, and the thermal-oxidizing-aging resistance is improved; and the load type functional agent solves the problem of dispersibility and solvent resistance of an antioxidant and a light stabilizer. The thermal-oxidizing-aging resisting polypropylene composite has a simple preparation method, is high in thermal-oxidizing-aging resisting efficiency and is widely applied to the field of household appliances such as electric cookers, microwave ovens, washing machines, dish-washing machines and the like.

A hypobarically-controlled artificial limb for amputees includes a single socket with a volume and shape to receive a substantial portion of the residual limb. A sealed cavity is formed between the socket and the residual limb. The wearer may use a liner over the residual limb for comfort. A vacuum source is connected to a vacuum valve connected to the cavity to suspend the artificial limb from the residual limb and to control and minimize volumetric and fluid changes within the residual limb A liner for a hypobarically-controlled socket for an artificial limb, with a liner interface bonding the liner to the socket and forming a seal between the liner and the socket. The liner may be permanently attached to the socket or the liner may be removed from the socket for replacement.

The invention discloses a graphene-aluminum oxide hybrid reinforced copper-based composite material. The composite material comprises 0.1-1.0 wt% of graphene, 1.0-1.2 wt% of Al2O3, and the balance copper. According to the copper-based composite material, the graphene and the aluminum oxide are adopted as complex-phase reinforcement bodies, zero-dimensional aluminum oxide particles can be effectively pinned through a special two-dimensional structure of a nano graphene sheet, a steric-hinerance effect is generated, accordingly, the agglomeration phenomenon of the particles is effectively reduced, and the particles are uniformly scattered; and the surface of the graphene is subjected to chemical nickel-plating and modification treatment, thus, the wettability and the interface bonding situation between the graphene/copper matrixes can be obviously improved, ideal interface bonding is achieved, accordingly, the synergistic effect between the graphene and the aluminum oxide particles is realized to the greatest extent, and the combination properties including strength, hardness, electrical conductivity, and friction and wear properties of the copper-based composite material are comprehensively improved.

A medical device lead connector includes electrically conducting contact rings spaced apart by an electrically insulating ring and in axial alignment. The electrically conducting contact ring and the insulating ring having an interface bond on an atomic level.

The invention relates to a surface grafting modified aramid fiber and a preparation method of the fiber. The method comprises the following steps of: mixing gamma-glycidoxypropyltrimethoxysilane with the aramid fiber with amino on the surface, placing the above mixture into a mixed solution of gamma-methacryloxypropyltrimethoxylsilane and another alkoxy silane, adding deionized water and an organic solvent into the resulting product, and carrying out cleaning and drying after the reaction ends to obtain hyperbranched polysiloxane modified aramid fiber, wherein the surface of the obtained fiber is connected with methacryloxy and another active functional group through chemical bonds. The surface of the fiber provided by the invention not only has the group capable of resisting strong ultraviolet irradiation, but also has the active functional group with high reactivity, as well as is improved in interface bond performance with a resin matrix; the types of the active functional groups can also be changed by regulating process conditions to adapt to reactions with a plurality of different resin matrixes to obtain a plurality of composite materials with outstanding comprehensive performance; and the fiber provided by the invention has the characteristics of high flexibility, strong controllability and wide application field range.

The invention belongs to the field of composite materials and particularly relates to a carbon fiber-reinforced resin composite material and a preparation method thereof. Graphene containing an active functional group in the surface is prepared through a modified Hummers method, and a carbon nano tube and the graphene can form a synergistic effect, so that the dispersibility of a nano-scale filler graphene and the carbon nano tube in a resin matrix is greatly improved, and meanwhile, the interface bonding force between the carbon fiber and the resin matrix can be improved due to the presence of the and the graphene and the carbon nano tube. Brominated epoxy resin is capable of improving the flame-retarding characteristic of the composite material; cyanate ester has high strength and reactivity is capable of improving the interface bonding capacity of the epoxy resin and the carbon fiber; and meanwhile, the cyanate ester is taken as a curing agent of the brominated epoxy resin. The carbon fiber-reinforced resin composite material has the advantages of being simple in process, friendly to environment and excellent in property of the composite material.

The invention relates to a wear resistant and antistatic polyamide composite material and a preparation method thereof. The composite material is composed of a polyamide matrix, a wear-resistant material, filler, a toughening compatibilizer, modified graphene, carbon fiber, a dispersant and an antioxidant. The wear-resistant material is formed by mixing of a modified hexagonal boron nitride microchip and a silicon carbide capsule, the filler is formed by mixing of titanium dioxide, carbon black and glass powder, the toughening compatibilizer is POE-g-MAH, and the modified graphene is phosphonitrilic chloride trimer treated graphene oxide. The synergistic effect of the modified hexagonal boron nitride microchip and the silicon carbide capsule can improve the wear resistance of the composite material, modified graphene, carbon fiber and carbon black are bridged into a conductive path, so that the composite material can have antistatic effect, the toughening compatibilizer prepared by the invention can improve the toughness of the composite material and the interface bonding force of the addition materials and the polyamide matrix. The preparation process provided by the invention is simple, and the prepared polyamide composite material has high wear resistance, high dispersibility and antistatic effects.

The invention provides a machining method for preparing an Al/Mg/Al alloy composite board by rolling. The method comprises: (1) a composite rolling process of cutting a Mg alloy board and aluminum boards, which are to be compositely rolled, into shapes with equal sizes, and performing surface cleaning and polishing treatment, sandwiching and fixing the Mg alloy board between the two aluminum boards and performing single-pass composite rolling on the fixed boards, wherein the rolling reduction ratio is 30 to 60 percent, the rolling temperature is 300 to 450 DEG C, and time for heat preservation before rolling is 5 to 15min; (2) a composite board annealing process of placing the rolled Al/Mg/Al alloy composite board into a heating furnace, heating the Al/Mg/Al alloy composite board to 150 to 230 DEG C, preserving heat for 1 to 12 hours, and taking out the Al/Mg/Al alloy composite board for air cooling. According to the method, a unique annealing process is adopted, and at proper annealing temperature, the interface bonding force of two alloys can be strengthened and the formation of a fragile phase is avoided, so that the phenomenon of stripping of the composite board in a serving process is avoided.

The invention discloses a polyolefin composite insulating material with the high thermal-oxidative stability and a preparation method thereof. The polyolefin composite insulating material is prepared from, by mass, 98%-99.5% of a polyolefin polymer matrix and 0.5%-2% of modified graphene oxide packing, wherein antioxidant-functionalized graphene oxide coated with polydopamine is adopted as the modified graphene oxide; through a grafted antioxidant, the thermal-oxidative stability of the material can be improved, and the graphene oxide can play a role in inhibiting migration of the antioxidant. By adopting the modified graphene oxide, not only can the interface bonding force between the polymer matrix and the packing be enhanced, but also the graphene oxide can be prevented from being deep reduced in the preparation process of the composite insulating material, and therefore the composite material keeps the good insulating property. The prepared polyolefin composite insulating material with the high thermal-oxidative stability has the advantages of being long in oxidation induction time, low in dielectric constant and dielectric loss and the like and is suitable for electric wire and cable insulating materials.

The invention discloses a method for testing interface bond behavior of CFRP (carbon fiber reinforced polymer) cloth-concrete based on a beam specimen. The method comprises three steps of preparing a test specimen, arranging a test point and loading a test. The test specimen manufactured in the first step is the beam specimen and comprise two concrete test blocks, which are arranged at left and right and symmetric in shape; the two concrete test blocks are inverted T-shaped concrete test blocks; the upper parts in the middle of the two concrete test blocks are connected by a steel hinge; the steel hinge is divided into left and right halves; and the left and right halves are respectively adhered to the concrete test block at the corresponding side, and have the rotation ability. Compared with the traditional double shear test method for testing the interface bond behavior of the CFRP cloth-concrete, the effect of asymmetric loading on the data reliability is avoided; the method has a unique advantage of high accuracy of the test result; and the accuracy and the creditability of the detection result are improved.

The invention provides modified polypropylene crude fiber used for reinforcing concrete, and belongs to the technical field of fiber. The modified polypropylene crude fiber is prepared by conducting melt blending and stretching on isotactic polypropylene and modified filler accounting for 0.1-40% of the weight of polypropylene. The modified filler is prepared from an organic modification agent, a coupling agent and inorganic modification filler. The modified polypropylene crude fiber is used for inorganic modified filler, antioxidant and dispersing agents, degradation of polypropylene is prevented, and dispersion of filler is improved. The preparation method includes the steps of adding polypropylene and modified filler in an extruder from different filler openings according to the proportion to be subjected to melt extrusion, the mixture is cooled in a water bath after being extruded out of a spinneret plate of the extruder, conducting thermal stability on fiber after polypropylene fiber is pulled and stretched, and conducting surface postprocessing, cut-off and packaging on fiber. According to the polypropylene crude fiber prepared through the method, silicon oxide groups or hydrophilic groups contained in modified filler can be subjected to chemical cross linking together with concrete, the interface bonding between the fiber and concrete is greatly improved, and the reinforcement effect of the fiber is improved.