34results about How to "Increased interlaminar shear strength" patented technology

The invention provides a carbon fiber and a preparation method and application thereof, and relates to the technical field of carbon fiber surface modification.The preparation method of the carbon fiber comprises the following steps that a polyacrylonitrile precursor is used as a raw material, graphitized fibers are prepared, and the graphitized fibers are subjected to surface modification; sequentially performing electrochemical oxidation surface treatment and sizing on the graphitized fibers to obtain carbon fibers; wherein the electrochemical oxidation surface treatment comprises the steps that first-stage surface treatment and second-stage surface treatment are sequentially conducted on the graphitized fibers, an alkaline electrolyte with hydroxyl is adopted in the first-stage surface treatment, and a composite electrolyte of ammonium acetate and ammonium dihydrogen phosphate is adopted in the second-stage surface treatment. Oxygen-containing functional groups and nitrogen-containing functional groups on the surface of the fiber are added, so that the interface performance of the carbon fiber can be improved.

The utility model belongs to the technical field of carbon fiber production equipment, and discloses a large-tow carbon fiber in-situ surface modification device. The device comprises a large-tow precursor frame, a bundling ring, a large-tow conveying roller set, a large-tow heating roller set, a carbon fiber surface oxidation heating loop, an in-situ modifier dipping spraying plate, a reaction furnace and a large-tow collecting roller set which are sequentially connected from front to back, and then the large-tow precursor frame, the bundling ring, the large-tow conveying roller set and the large-tow heating roller set are sequentially connected. The large-tow carbon fibers jointly pass through a large-tow precursor frame, a bundling ring, a large-tow conveying roller set, a large-tow heating roller set, a carbon fiber surface oxidation heating loop, an in-situ modifier dipping spraying plate, a reaction furnace and a large-tow collecting roller set in sequence. Through multi-aspect structural improvement, the structure of the surface modification device is simplified, the tensile strength and interlaminar shear strength of the carbon fiber composite material are effectively enhanced, the problems of insufficient reinforcement and low production efficiency of the original carbon fiber composite material are solved, and advanced manufacturing of the high-performance large-tow carbon fiber composite material is promoted.

This invention provides a plasma-modified glass fiber reinforced polyetheretherketone (PEEK) composite material and its preparation method, belonging to the field of glass fiber reinforced materials. The composite material is prepared by treating a PEEK film and glass fiber cloth with glow discharge plasma, followed by hot pressing, resulting in a composite material with good compatibility between PEEK and glass fiber. This method can significantly improve the interfacial bonding strength between glass fiber and PEEK resin, thereby improving the mechanical properties of the composite laminate. The interlaminar shear strength of the composite material is increased by 43% compared to the untreated composite material. Furthermore, this method also has the advantages of energy saving, environmental protection, short processing time, and high efficiency.

The application discloses high-strength composite cement blanket and belongs to the technical field of civil engineering composite materials. The application improves the three-dimensional fabric structure: a three-dimensional weaving is adopted to form a top layer, a middle layer and a bottom layer, wherein the middle layer is formed by a honeycomb three-dimensional structure formed by interweaving vertical fiber filaments and horizontal oblique fiber filaments which are arranged obliquely relative to the vertical fiber filaments; the vertical fiber filaments connect the top layer and the bottom layer; and the horizontal oblique fiber filaments pass through the vertical fiber filaments in an S-shaped wiring mode multiple times to form limiting knots which are distributed in the top layer, the middle layer and the bottom layer to form an overall tensile strength reinforcing structure. The three-dimensional fabric can be combined with a "two cloth and one film" protective layer and a solidifiable composite material containing gold steel sand. The application realizes isotropic reinforcement through the honeycomb structure and builds a mechanical occlusal interface through the S-shaped limiting structure, thereby significantly improving the bending strength, interface adhesion and waterproof durability of the cement blanket, and the application is suitable for slope protection, trench lining and temporary road paving engineering and the like.

The invention belongs to the technical field of road engineering, and discloses a concrete bridge deck pavement structure and a construction method.The concrete bridge deck pavement structure comprises a concrete base layer, the top of the concrete base layer is covered with a waterproof binder, and the top of the waterproof binder is covered with an asphalt concrete mixture; the top of the asphalt concrete mixture is covered with a stone mastic asphalt mixture; the waterproof binder adopts an asphalt binder or an epoxy resin binder; the paving thickness of the asphalt concrete mixture is 4.5 cm, and the paving thickness of the stone mastic asphalt mixture is 4 cm. By optimizing the thickness combination of the upper surface layer and the lower surface layer and improving a waterproof binder material and a forming process, light weight, durability and economization of bridge deck pavement are achieved, and the bridge deck pavement structure can be suitable for bridge engineering in high-temperature and rainy areas.

The utility model relates to the technical field of sewage treatment equipment, in particular to a glass fiber reinforced plastic integrated sewage treatment equipment barrel which comprises an inner tank, a protection assembly is arranged on the outer side of the inner tank, the protection assembly comprises a protection layer and a connecting plate arranged on the outer side of the protection layer, and an outer tank is arranged on the outer side of the connecting plate. A plurality of groups of connecting plates are arranged on the outer side of the protective layer at equal intervals, and the outer sides of the connecting plates penetrate through the protective layer through locking bolts to be fixedly connected with the inner tank, through the arranged protective assembly structure, a user can make close contact with the inner tank through the protective layer in the protective assembly structure, firstly, a coupling agent makes contact with the inner tank, and then the inner tank is protected; the inner side of the outer tank is connected and fixed with the inner tank through the locking bolts, the interlayer shear strength between the inner side of the outer tank and the high-modulus fiberboard (protective layer) is increased through the coupling agent plate, the stability is high, aging and stripping are not prone to occurring, and the protective layer with the thickness of 200 mm and the length of 400 cm is convenient to guarantee the service life of sewage treatment equipment when being matched with chemical agents for purification treatment.

This invention provides a sandwiched pressure hull structure and its processing method, relating to an underwater vehicle structure, including an inner hull, an outer hull, and an intermediate sandwich layer located between the inner and outer hulls. The intermediate sandwich layer includes hollow glass microspheres, reinforcing fibers, and epoxy resin. The spherical hollow glass microspheres and reinforcing fibers are uniformly mixed in the epoxy resin and placed in a fluidized state between the inner and outer hulls. After vacuum curing, they form a buoyancy material located between the inner and outer hulls. This invention addresses the problems of insufficient load-bearing capacity and low specific strength and specific stiffness of the pressure hulls of underwater vehicles in the prior art.

The application discloses a kind of PEI or PEEK-based 3D printing wave-absorbing materials and preparation method thereof.The 3D printing wave-absorbing material includes the following components by mass fraction: polyetherimide resin or polyether ether ketone resin: 45~65 parts;Electromagnetic wave absorber: 10~50 parts;Impact modifier: 4~12 parts;Flow aid: 2~8 parts;Antioxidant: 0.5~3 parts;Wherein, the electromagnetic wave absorber includes magnetic absorber and carbon-based absorber, the impact modifier and the carbon-based absorber are pre-coated to form the carbon-based absorber coated with the impact modifier on the surface, and the magnetic absorber is surface modified by silane coupling agent.The application significantly improves the mechanical properties and thermal stability of the material by using specific raw material composition and combining specific multi-layer co-extrusion and online heat treatment process.The preparation process is simple and easy to operate, and is suitable for industrial continuous production.

The present invention discloses a high-ductility fiber-reinforced polymer tendon and a preparation method thereof, and relates to the field of fiber-reinforced composite materials. The high-ductility fiber-reinforced polymer tendon includes the following components in volume fraction: polyvinyl alcohol fiber 5-40wt%, aramid fiber 5%-40wt%, carbon fiber 5%-40wt%, resin 15-30wt%, curing agent 0.5-2.5wt%, accelerator 0.5%-2.5%, filler 2%-6%. The high-ductility fiber-reinforced polymer tendon uses polyvinyl alcohol fiber as the core, weaves aramid fiber three-dimensionally on its periphery, and then three-dimensionally weaves carbon fiber on the periphery of aramid fiber, impregnates through a thermosetting resin matrix, and then uses a mold forming device with ribs to preliminarily form and pultrude, heat and cure, and cut to obtain a high-ductility fiber-reinforced polymer tendon of the required size. This material has good ductility and yield properties, can be widely used in the field of concrete structure engineering, and solves the problem of low ductility of FRP tendons.

This application discloses a method for preparing a double-needle stitched reinforced wall panel structure, relating to the field of fiber composite material reinforcement technology. The method includes the following steps: designing and machining a digital model of a double-needle stitching mold based on the reinforced wall panel structure; creating oblique grooves along the stitching direction in the double-needle stitching mold, the depth and width of which are adapted to the movement trajectory of the double needles; cutting carbon fiber cloth as reinforcing layer and skin layer according to the reinforced wall panel structure; stacking the reinforcing layer and skin layer on the double-needle stitching mold in a predetermined order and fixing them; using a double-needle stitching device, simultaneously stitching the flanges of the reinforcing layer and skin layer along the stitching path to form a double-stitch preform; impregnating the double-stitch preform with resin using a vacuum-assisted liquid molding process, and curing it to obtain the reinforced wall panel structure. This application is the first to apply double-needle synchronous stitching technology to mainstream reinforced structures without foam cores, solving the problem of insufficient interlayer strength in traditional adhesive / co-curing processes, and can cover most reinforced wall panel structural forms in the aerospace field.

The invention discloses a target head cover structure based on winding and needling processes and a forming method of the target head cover structure, and belongs to the technical field of composite material structure manufacturing. Comprising a head cap and a cover body, the head cap is inserted into the mortise of the cover body through the tenon and is sewn and fixed through sewing fibers; the head cap and the mask body are sewn and then jointly subjected to chemical vapor infiltration and reactive infiltration densification treatment, so that in a connecting interface area of the head cap and the mask body, sewn fibers and carbon and silicon carbide matrixes generated in situ in the densification process are interwoven and embedded, and a three-dimensional continuous enhanced interface structure is jointly formed. According to the structure, an independent physical interface formed by an adhesive or a mechanical connecting piece is eliminated at the joint of the head cap and the mask body, so that structural fusion of the head cap and the mask body is realized. According to the invention, through a synergistic process of joggling, sewing and co-densification, the integrated forming of the component is realized, and the integrity, the bearing capacity and the production efficiency of the structure are remarkably improved while the product consistency is ensured.

The invention relates to a high-temperature-resistant structure bearing-wave-transmitting integrated composite material and a preparation method thereof, belongs to the technical field of composite materials, and solves the problems that an existing structure bearing-wave-transmitting composite material is serious in layering, low in interlayer shear strength and complex in preparation method. A high-temperature-resistant structural bearing-wave-transparent integrated composite material comprises a structural bearing area, a transition area and a wave-transparent area which are located on the same plane, the transition area is located between the structural bearing area and the wave-transparent area, and the structural bearing area, the transition area and the wave-transparent area are integrally formed through co-curing. The structure bearing area comprises a carbon material fiber / polyimide resin matrix composite material, the wave transmission area comprises a quartz fiber / polyimide resin matrix composite material, and the transition area comprises a chopped carbon material fiber-chopped quartz fiber / polyimide resin matrix composite material. The high-temperature-resistant structural bearing-wave transmission integrated composite material has no interface layering defect and is high in interlayer shear strength, and the preparation method is simple.

The invention relates to a structural battery based on integration of a honeycomb composite material and an electrochemical energy storage unit. According to the structural battery, a force bearing function and an electric energy storage function are combined. According to the battery, a bionic honeycomb composite material is adopted as a matrix, and a lithium ion electrochemical unit is embedded into the matrix, so that the multifunctional structure battery with high mechanical strength and excellent electrochemical performance is formed. The honeycomb composite material is used as a carrier and an ion transmission channel of an electrode active material, and is also used as a bearing structure of a mechanical load. According to the design, the energy density, the safety and the cycle life of the battery are remarkably improved, and the battery is particularly suitable for the fields of electric automobiles, aerospace and the like with relatively high requirements on light weight and space utilization rate.

The invention relates to the technical field of composite material magnesium alloy pipe component forming and manufacturing, in particular to a thermoplastic carbon fiber reinforced magnesium alloy composite pipe differential temperature air pressure regulation and in-situ reinforcement integrated forming method which comprises the steps that a magnesium alloy pipe blank is subjected to heat treatment; magnesium alloy pipe blank surface treatment; assembling a magnesium alloy composite pipe prefabricated body; a differential temperature field is constructed for the magnesium alloy composite pipe, so that the thermoplastic resin in the magnesium alloy composite pipe enters a viscous flow state while the magnesium alloy keeps good plasticity; then air pressure and axial feeding cooperative loading is carried out, and precise forming of the mold is achieved; the magnesium alloy composite pipe component is subjected to differential temperature cooling, thermoplastic resin is promoted to be fully infiltrated by means of radial shrinkage compressive stress generated at the interface by means of thermal expansion difference caused by inner and outer layer temperature difference, and in-situ enhancement of the interface of the magnesium alloy composite pipe is achieved; the requirements of high-end equipment for high-performance and high-efficiency preparation of the magnesium alloy composite pipe are met with high integration level and high strength.

The present invention relates to a vehicle body member having a charging and discharging function, the vehicle body member comprising: a first battery cell including a first negative electrode portion and a first positive electrode portion arranged to be in contact with a first surface of the first negative electrode portion, the first negative electrode portion including carbon fibers, and the first positive electrode portion including a first positive electrode active material and a first solid electrolyte, wherein at least one first through hole penetrates the first negative electrode portion and the first positive electrode portion; a second battery cell including a second negative electrode portion and a second positive electrode portion arranged to be in contact with a first surface of the second negative electrode portion, the second negative electrode portion including carbon fibers, and the second positive electrode portion including a second positive electrode active material and a second solid electrolyte; a reinforcing insulating layer formed into a honeycomb structure and having two opposite surfaces, each surface having at least one insertion protrusion inserted into each of the first through hole and the second through hole, respectively; a first positive electrode collector; a second positive electrode collector; a first negative electrode collector; and a second negative electrode collector.

The invention relates to the technical field of polymer materials, and in particular to a highly flame-retardant polyether type TPU material and a preparation method thereof. In the preparation of the modified polyether type TPU, the invention adds amino nano-silica, which can make the amino nano-silica uniformly dispersed in a TPU matrix to form physical cross-linking points, thereby enhancing the mechanical strength, modulus and wear resistance of the TPU. The nano-scale dispersion can significantly improve the overall mechanical properties of the material, and the addition of the amino nano-silica can improve the resilience, tear resistance and fatigue resistance of the TPU; the amino nano-silica can shield ultraviolet rays through its surface properties, thereby indirectly improving the ultraviolet aging resistance of the TPU, and enabling the TPU to maintain stable performance in a humid environment; the amino group on the surface of the amino nano-silica has high reactivity and can be coupled with a variety of molecules and groups, laying a foundation for the subsequent functional modification of the TPU through a flame retardant.

This invention discloses a carbon fiber composite material for rail transit vehicles and its preparation process, relating to the field of carbon fiber composite material technology. The method uses carbon fiber cloth as a matrix, depositing a polydopamine layer on its surface, then loading graphene epoxide, and using the polydopamine layer to grow manganese dioxide nanosheets in situ to obtain a carbon fiber matrix. Epoxy resin is then prepolymerized by pouring it into a mold, and the carbon fiber matrix is ​​laid flat in the prepolymerized resin. Epoxy resin is then poured in again, and the mixture is heated and cured under a pressure of 45–50 N to obtain the carbon fiber composite material. The carbon fiber composite material prepared by this method exhibits excellent mechanical properties, with improved tensile strength and interlaminar shear strength, and can be widely used in vehicles, ships, and other fields, demonstrating high practicality.

This invention discloses a method for preparing carbon fiber epoxy composite materials that combine high mechanical properties and a low coefficient of thermal expansion. Belonging to the field of composite materials, it addresses the technical challenge of simultaneously improving the mechanical properties and reducing the coefficient of thermal expansion of composite materials using existing carbon fiber processing methods. By non-covalently modifying carbon nanotubes with ionic liquids, unlike traditional covalent modification methods, the intrinsic strength of carbon nanotubes is preserved, constructing a multi-mechanism synergistic interface reinforcement system. This specifically addresses the key problems of traditional sizing agents having a single interfacial effect and hindered stress transmission. In this invention, flexible polyimide acts as a bridge at the interface, while rigid carbon nanotubes construct an effective armor on the fiber surface. The two form a rigid-flexible composite structure at the interface, which effectively alleviates interfacial stress concentration, significantly improves interfacial stress transmission efficiency, achieves uniform dispersion of external loads, and ultimately improves the mechanical properties of the carbon fiber epoxy composite material.

The utility model discloses a preparation device of a novel high-strength FRP pipe core for electrolytic copper foil, which comprises a steel core mold, a laying device is arranged right above the steel core mold, a grid fiber layer is sleeved outside the laying device, one side of the steel core mold and one side of the laying device are connected with a winding machine moving frame in a sliding mode, and the winding machine moving frame is connected with a winding machine. A driving mechanism used for driving the winding machine moving frame to move in a reciprocating mode is arranged below the winding machine moving frame, one side of the outer wall of the winding machine moving frame is rotationally connected with winding heads distributed at the inclination angle of 30 degrees, and the other side of the outer wall of the winding machine moving frame is fixedly connected with a gum dipping groove. According to the utility model, the grid fiber layers which are laid in an inclined and crossed manner by 30 degrees are additionally arranged and form an orthogonal interaction locking interface with the wound linear fiber layers, so that the defect of traditional single-direction fiber arrangement is overcome, and under the same strength, the grid layer and linear layer composite structure can reduce the wall thickness of the tube core, reduce the weight of a single tube core, improve the radial compression strength and improve the tensile strength of the tube core. And high-strength and light-weight tube core preparation is realized.

The invention relates to the technical field of material engineering, in particular to an aramid fiber-epoxy composite material based on ultraviolet irradiation and a preparation method. The method comprises the following steps: carrying out ultraviolet radiation on modified aramid fiber, and mixing the irradiated modified aramid fiber with epoxy resin to prepare the aramid fiber-epoxy composite material. According to the method, the aramid fiber-epoxy wettability can be enhanced through ultraviolet radiation, and the mechanical property of the composite material is effectively improved; the method is simple in step, low in cost and stable in modification effect; the aramid fiber-epoxy composite material has good bending resistance, compression resistance and torsion resistance, and the interlaminar shear strength is remarkably improved.

The invention relates to the technical field of high polymer materials, and discloses a flame-retardant epoxy resin composition which comprises the following components based on the total amount of the composition: 30-40 wt% of epoxy resin, 20-40 wt% of a curing agent, 0.5-2 wt% of an accelerant, 20-30 wt% of a flame retardant, 1-10 wt% of a diluent, 1-5 wt% of a coupling agent and 0-1 wt% of a defoaming agent. The flame-retardant epoxy resin composition has the effects of high flame-retardant efficiency and good mechanical property, meets the highest-grade flame-retardant requirement in UL94 and other standard requirements, and has excellent manufacturability in the processing process of a composite material, and an obtained product is attractive in appearance.

The application discloses a kind of high-performance glass fiber reinforced polypropylene composite material and preparation method thereof, it is related to high molecular composite material technical field;The application constructs the co-continuous gradient transition layer by polypropylene oligomer between glass fiber surface and polypropylene matrix, the polypropylene oligomer in the transition layer is gradually decreased in concentration in the direction from glass fiber surface to polypropylene matrix, concentration adjacent glass fiber surface is higher than adjacent polypropylene matrix concentration, so that there is no clear interface boundary between glass fiber and polypropylene matrix;The application passes through high concentration and low concentration polypropylene oligomer solution by layer gradient impregnation process in sequence by glass fiber, after drying, and polypropylene matrix is fused and is compounded so that gradient transition layer and matrix form molecular chain entanglement network, stress transmission mode is changed from jumping type to continuous type, and stress concentration point in traditional two-phase structure is eliminated.

The invention discloses a prepreg for a high-temperature-resistant and high-toughness bismaleimide resin composite material, the composite material and a preparation method, and belongs to the technical field of hot-melt prepreg and polymer composite materials. The problem that the bismaleimide resin composite material cannot have heat resistance and toughness at the same time is solved. Two toughening modifiers of a diallyl compound and polyimide are adopted to modify bismaleimide resin, and the method comprises the following steps: mixing and grinding the modifiers, adding the bismaleimide resin for polymerization to obtain a bismaleimide resin adhesive, preparing a prepreg from the bismaleimide resin adhesive and fibers by using a hot melting method, and curing to obtain the bismaleimide resin composite material. The bismaleimide resin prepreg and the composite material provided by the invention are simple in preparation method, the prepreg is good in manufacturability at normal temperature and long in storage period, the glass-transition temperature of the composite material is greater than 300 DEG C, the normal-temperature and high-temperature mechanical properties are excellent, and the bismaleimide resin prepreg and the composite material have wide application prospects in the field of aerospace composite materials.

The invention belongs to the technical field of novel materials, and particularly relates to a PVDF / PEMA-carbon fiber integrated structure optimized carbon fiber / epoxy resin composite material constructed based on a roller electrostatic spinning technology, a preparation method and application. According to the invention, carbon fiber is used as a base material, and roller electrostatic spinning PVDF / PEMA micro-nano fiber is used as a high-performance modifier. By introducing electrostatic spinning PVDF / PEMA micro-nano fibers, the interfacial interaction between the carbon fibers and a resin matrix is enhanced, and a micro-nano fiber bridging structure is constructed to reinforce interlayer bonding, so that the carbon fiber / epoxy resin composite material with an optimized PVDF / PEMA-carbon fiber integrated structure constructed by a roller electrostatic spinning technology is prepared.

A method for preparing a medium-temperature curing epoxy resin prepreg modified by a composite toughening agent, which relates to a method for preparing and an application of a medium-temperature curing epoxy resin. The purpose of the present invention is to solve the problem of low interlaminar shear strength and poor toughness of existing medium-temperature curing epoxy resin prepregs. Method: 1. Prepare a composite toughening system; 2. Modify the medium-temperature curing epoxy resin with a composite toughening agent; 3. Prepare a resin film; 4. Composite the resin film with a reinforcing material to obtain a composite toughening agent modified medium-temperature curing epoxy resin prepreg. The present invention has a simple preparation process and high cost performance, and can effectively improve the interlaminar shear strength and impact toughness of the composite material; the composite toughening agent modified medium-temperature curing epoxy resin prepreg prepared by the present invention can be widely used in aviation, aerospace, ships, civilian products and other fields. The present invention can obtain a composite toughening agent modified medium-temperature curing epoxy resin prepreg.

The invention discloses a carbon fiber sizing agent and a preparation method and application thereof, particularly relates to the technical field of carbon fiber sizing agents, and is characterized in that the carbon fiber sizing agent is prepared from epoxy resin and auxiliaries, the epoxy resin is at least one of bisphenol A epoxy resin or phenolic aldehyde modified epoxy resin, and the auxiliaries are epoxy resin. The auxiliaries comprise a flexibilizer, a soaking agent, a softening agent, a moisture absorbent and an emulsifier, the flexibilizer is one or more of polyether polyol or hydroxyl-terminated polybutadiene, the soaking agent is a nonionic surfactant, the softening agent is one or more of fatty acid ester or fatty acid amide, and the moisture absorbent is one or more of polyisobutylene or polyisobutylene. The moisture absorbent is one or more of glycerol or sorbitol, the emulsifier is a nonionic surfactant, the concentration of the sizing agent is easy to control, the binding force between the sizing agent and the carbon fiber surface is strong, and the compatibility between the sizing agent and a resin matrix is good.

This invention relates to the field of triazine polymer preparation technology, specifically to a triazine polymer, a high-temperature resistant carbon fiber sizing agent, a preparation method, and applications. The main chain segment of the triazine polymer is a triazine structural unit. The triazine polymer is modified by synergistically introducing two different structures: R2 is a structural unit formed by removing hydroxyl hydrogen atoms from an aromatic dihydroxy compound with a rigid aromatic backbone or aromatic ketone structure, used to improve compatibility with high-temperature resistant thermoplastic resins; R3 is a structural unit formed by removing hydroxyl hydrogen atoms from an aromatic dihydroxy compound with a large-volume substituent or lactone structure, disrupting the tight packing of the molecular chain and improving the solubility of the polymer. The triazine polymer is used in the preparation of a carbon fiber sizing agent, giving the sizing agent excellent heat resistance. This sizing agent can withstand the high-temperature molding and processing environment of special engineering plastics, resulting in a novel carbon fiber sizing agent that simultaneously possesses excellent heat resistance and interfacial compatibility.

The invention provides a high-bending-resistance moisture-proof corrugated board which sequentially comprises a paper core layer, a middle layer and a surface layer from top to bottom, honeycomb-shaped elastic rods and staggered supporting corrugations are embedded in the paper core layer, raw materials of the paper core layer comprise small paper balls made of 30% bamboo wood pulp and waste paper residues, and the diameter of each small paper ball is smaller than or equal to 20 mm; the surface layer comprises a mixed layer of sisal fibers and abaca fibers, the ratio of the sisal fibers to the abaca fibers is 3: 1-5: 1, the surface of the surface layer is coated with a dynamic waterproof layer, the dynamic waterproof layer is composed of hydroxylated graphene modified polyacrylate emulsion, and the mass ratio of slurry to a waterproof agent is 40: 1; and the interlayer is a glass fiber gridding cloth composite layer. The compression resistance is improved, the rebound resilience is enhanced, and the moisture absorption problem of the core layer is effectively solved.

The invention discloses a carbon fiber surface modification method for improving interface performance through anodic oxidation. According to the method, on the basis of the anodic oxidation principle, an auxiliary reagent perchloric acid is added into electrolyte diammonium hydrogen phosphate to react on the surface of the carbon fiber, the surface oxidation treatment degree of the carbon fiber is increased, and on the basis of original anodic oxidation, the surface damage of the carbon fiber is reduced by reducing the current density, shortening the electrolysis time and other experimental parameters; the interlaminar shear strength is improved, the binding force between the carbon fibers and the resin is enhanced, and the performance of the high-modulus carbon fiber composite material is improved.