180 results about "Interfacial binding" patented technology

The invention belongs to the technical field of high-performance cutter coatings, and relates to a cross-scale bionic gradient coating design method based on a multi-principal-element high-entropy system, which comprises the following steps: sequentially forming a high-entropy alloy plastic layer, a high-entropy alloy / high-entropy ceramic tough layer and a nanocrystalline high-entropy ceramic superhard layer on the surface of a cutter matrix, and constructing a gradient transition structure; the method comprises the following steps: matching a high-entropy alloy plastic layer with a tool matrix binding phase, optimizing a high-entropy alloy / high-entropy ceramic tough layer material, improving interface binding force, optimizing gradient transition design by adopting thermal-mechanical coupling calculation, constructing an atomic model, simulating and optimizing a microstructure based on molecular dynamics, and establishing a finite element model to simulate thermal cycle and mechanical load. The interface performance is optimized, a mathematical model is constructed through a BP neural network and a particle swarm optimization algorithm, and gradual transition design of the tool base body and the coating is achieved. The problems that the tool coating interface is high in brittleness, insufficient in adhesiveness, limited in thermal stability and the like are solved, and the bonding performance of the coating interface and the stability and durability of the coated tool are improved.

The invention discloses a series of inorganic polymeric adhesives and repair application thereof, the inorganic polymeric adhesives are oligomer structures formed by reaction of inorganic cation precursors and inorganic anions in the presence of capping agents, and the oligomer structures can be cured to form an inorganic polymeric network. The formula of the adhesive can be subjected to ion level regulation and control according to the specific composition of a to-be-repaired inorganic material product, ionic bond reconstruction between the adhesive and a base material is achieved in the heat treatment process, an inorganic interface bonding layer which is compact in structure, matched in crystal form and coordinated in thermal expansion is formed, and the adhesive has the advantages of being high in continuity, free of weak bonding areas, free of obvious pores and the like. The problems of thermal aging, falling, chromatic aberration and the like of a traditional binder can be effectively avoided, the service life of a repaired structure is prolonged, and the environmental stability is improved. The method has popularization and application potentials in the fields of aerospace, weaponry, advanced manufacturing, consumer electronics, medical health, cultural relic repair, jade repair, decorative art and the like.

The invention provides a preparation method of a high-adhesion transparent self-healing super-smooth coating. Polydimethylsiloxane is taken as a matrix, a three-arm type dynamic hydrogen bond network structure is constructed, and 2-ureido-4-pyrimidone (UPy unit) is taken as a crosslinking node to be connected with a siloxane main chain, so that the crosslinking density and the interface binding energy are remarkably improved. According to the invention, a UPy unit is innovatively introduced into a main chain or a side chain to construct two topological structures of (SUP) 2TD or (MUP) 2TD. Compared with (MUP) 2TD, the (SUP) 2TD shows excellent tensile property and self-healing property in both air and underwater environments. The enhancement of this performance is attributed to the improvement of chain displacement capability in (SUP) 2TD. Through interface dynamics, a UPy unit is guided to an interface and interacts with an interface group, and a very strong adhesion effect is obtained. In addition, the coating shows excellent self-healing performance.

The invention discloses a nano-microporous composite aerogel material and a preparation process thereof, and belongs to the technical field of aerogel materials, the composite aerogel material comprises modified PTFE dispersion liquid, SiO2 sol, a magnetic hydrophobic modifier, self-repairing microcapsules, reinforced fibers and a surface modifier. The double-shell structure of the self-repairing microcapsule provides excellent mechanical strength and chemical stability, and the self-repairing microcapsule can crack and release the siloxane prepolymer core material during microcrack propagation. The PTFE dispersion liquid is pretreated through plasma-initiated graft polymerization, so that the interface bonding force between the reinforced fiber and the composite aerogel is remarkably improved. According to the treatment method, a chemical bonding layer is formed on the surface of the fiber, and the mechanical interlocking and chemical bonding force of an interface are enhanced, so that the layering phenomenon is avoided, and the stability of the material in a repeated impact environment is further improved.

The invention discloses a quality evaluation method and system for a composite board, and relates to the technical field of quality detection, and the method comprises the steps: constructing a latent variable feature space representing interface binding energy abnormity based on an initial response data field through a physical constraint relation between interface local response features and binding energy distribution; extracting a topological correlation structure between local latent variable features in the latent variable feature space through a graph convolutional network to obtain a local binding energy anomaly initial candidate region; active response mode enhanced excitation is carried out on the local area of the initial candidate area, the dynamic enhanced response of each local area is obtained, and a binding energy abnormal area is determined; determining the specific position and range of the hidden pseudo solder strip according to the correlation topological structure difference between the local feature in the binding energy abnormal region and the normal region; according to the method, precise identification and high-precision positioning of the titanium-steel composite plate interface hidden cold solder strip are realized.

The invention relates to the technical field of electrochromic devices, in particular to an interface-enhanced gel-based electrochromic device and a preparation method thereof. The interface enhanced gel-based electrochromic device comprises a bottom electrode layer, a first modification layer, a gel electrolyte layer, a second modification layer, an electrochromic layer and a top electrode layer which are arranged in sequence, wherein the first modification layer and the second modification layer are independently modification layers based on catechol or derivatives thereof. According to the interface-enhanced gel-based electrochromic device, the excellent ion migration characteristic of the hydrogel electrolyte is utilized, and the strength and toughness of the electrolyte can be improved. The gel electrolyte layer based on the structure provided by the invention has excellent interface bonding force, and is convenient for ions to quickly migrate under the driving of an external field, so that the electrochromic device has excellent cycling stability.

This invention provides a multifunctional gradient composite filament for 3D printing, its preparation method, and its applications, relating to the field of additive manufacturing materials technology. The filament's cross-section includes at least two structurally or functionally distinguishable regions, each region composed of a thermoplastic polymer with different chemical properties, or a thermoplastic polymer matrix with the same chemical properties but different functional modifications. These at least two regions are arranged in an ordered spatial pattern on the filament's cross-section using a multi-component co-extrusion technique, enabling pre-design and integration of properties. This invention overcomes the inherent limitations of traditional single-material filaments, achieving multifunctionality and performance designability of a single filament. It significantly improves the interlayer bonding performance of multi-component 3D printing and the comprehensive mechanical properties of the printed composite material. Furthermore, it allows for the production of components with both functional gradients and high mechanical properties in a single printhead operation, making it suitable for mass production.

The invention relates to a preparation, regulation and control method of a thermoplastic elastomer encapsulating material in the technical field of new materials, which comprises the following steps: realizing an in-situ reaction process by controlling the concentration and reaction temperature of reactive functional groups in the encapsulating material according to an interface reaction rate constant and active group distribution density; if the reaction conversion rate reaches a preset value, a chemically bonded interface bonding layer is formed; monitoring the stress distribution state in the rubber coating layer by adopting a stress analysis algorithm, and when detecting that local stress concentration exceeds the yield strength of the material, dispersing a stress concentration area by adjusting the length of a flexible chain segment and the density of a rigid cross-linking point in a cross-linking network; and deformation data and a bonding strength change trend of the interface bonding layer in the temperature cycling process are obtained, if the bonding strength attenuation rate exceeds a preset threshold value, a dynamic cross-linking mechanism is activated, and the dynamic equilibrium state of interface bonding is maintained through fracture and recombination of a reversible covalent bond.

According to the nano reinforced epoxy resin and the preparation method thereof provided by the invention, the composite coupling agent system and the multiple different nano material composite system are introduced, and the design of the composite coupling agent system aims to act on three different nano materials through a unified system at the same time; and the dispersibility and the interface bonding force of the epoxy resin in an epoxy resin matrix are enhanced. The three different nanometer materials are selected from nanometer silicon dioxide, carbon nanotubes and graphene; the composite coupling agent is uniformly adsorbed on the surfaces of the three nano materials, so that the three nano materials form a stable dispersion state in an epoxy resin matrix. And ultrasonic waves or mechanical stirring is used for treatment, so that the surfaces of all nano materials can uniformly adsorb the composite coupling agent, and the performance of the epoxy resin is remarkably improved. The interface bonding force between the surface-modified nano silicon dioxide, the carbon nano tube and the graphene and the epoxy resin is enhanced, and the problem that the dispersity and the interface bonding force of nano particles are insufficient is solved.

The invention provides a mineralized collagen cartilage repair scaffold and a preparation method and application thereof, and relates to the technical field of biomedical materials.The preparation method comprises the steps that a collagen solution subjected to mineralization treatment is injected into a mold, and a mineralized collagen layer is obtained through deep freezing and primary freeze drying; taking the mineralized collagen layer as a bottom layer, injecting a collagen solution which is not mineralized, and performing deep freezing and first freeze drying to obtain a freeze-dried scaffold; and carrying out crosslinking and secondary freeze drying on the freeze-dried scaffold, and compressing to obtain the mineralized collagen cartilage repair scaffold. A necessary bioactive interface, a continuous interpenetrating structure of a collagenous fiber network and cross-linking treatment are provided for osseointegration, and interlayer separation is avoided; bidirectional regeneration of osteochondral bone is realized, and complexity and risk of clinical application are reduced; in a wet state, good tailorability and enough stiffness are achieved, and meanwhile stable mechanical support is provided; the technical problem that in the prior art, a stent material is insufficient in systematicness of biosecurity of multi-scale structure bionics and interface bonding agents is solved.

The present invention relates to the technical field of composite materials, and solves the technical problem that it is difficult to prepare a diamond / aluminum composite material with a tightly bonded interface while ensuring high thermal conductivity in the prior art. In particular, it relates to a diamond / aluminum composite material with a nano-gradient interface and a preparation method thereof. The present invention introduces a carburizing method on the basis of the magnetron sputtering method, and realizes the in-situ generation of new phases in each modified layer from the outermost metal element layer to the diamond surface through adsorption and diffusion, promotes the transformation of the metal modified elements on the diamond particle surface into carbides, and constructs a nano-gradient interface carbide layer. While the nano-scale interface layer improves the interface bonding between diamond and aluminum, it minimizes the introduced interface thermal resistance to the greatest extent. The present invention combines magnetron sputtering deposition with the carburizing method to prepare a nano-gradient multi-carbide interface layer with precisely controllable thickness, enhances the degree of interfacial diffusion reaction between diamond and aluminum, weakens the interfacial phonon scattering, and can give full play to the high thermal conductivity of diamond particles more fully.

The invention relates to enhanced carboxyl type rubber and a preparation method thereof, and the enhanced carboxyl type rubber comprises the following components in parts by mass: every 100 parts of carboxyl type rubber, 0.5-2 parts of a silane coupling agent, 30-70 parts of a reinforcing agent, 2-6 parts of a water generating agent, 1-4 parts of an antioxidant, 1-5 parts of an anti-aging agent and 1-3 parts of a flow promoter. The invention provides a green, non-toxic, rapid and efficient method for crosslinking acrylate rubber by using a silane coupling agent, which does not need an accelerant, so that the defects of the traditional process are overcome, and the comprehensive performance of the material is improved at the same time. Meanwhile, the coupling agent improves the compatibility between the inorganic filler and the matrix, enhances the interface bonding force, prevents filler agglomeration and improves the comprehensive performance of the material, so that the key technical problems of non-uniform filler dispersion, weak interface bonding force, performance reduction, poor processability and the like in the traditional composite material are solved.

The present invention discloses a heterogeneous metal laminated composite armor and a preparation method thereof, comprising the following steps: A. Prepare different heterogeneous metal elements respectively and stack them along the thickness direction; B. Vacuum package the periphery of the interface of the stacked heterogeneous metal elements; C. Achieve metallurgical bonding of the heterogeneous metal interfaces through stacked forging and heat preservation diffusion treatment; D. Obtain a heterogeneous metal laminated composite armor with specific specifications through forging and precision rolling. The present invention uses a high-strength metal as the face plate and a high-toughness metal as the back plate, and at least one of the two metals is a high specific strength material. Through stacked forging and heat preservation diffusion treatment, strong metallurgical bonding is achieved at the heterogeneous metal interfaces, and combined with subsequent forging and precision rolling processes, a lightweight metal composite armor plate with excellent anti-ballistic performance is prepared, improving the anti-multi-projectile strike ability and comprehensive protection performance of the armor, and solving the problem of weak interfacial bonding strength of heterogeneous materials.

The invention discloses a preparation method of an MXene reinforced Cu-based composite material with strong interface bonding, and belongs to the technical field of composite material preparation. According to the method, an MAX phase material is adopted, few layers of MXene are mixed with copper salt, and MXene with Cu or Cu2O single or mixed nano-particles uniformly deposited is formed; then mixing with copper powder or copper ions to obtain MXene / Cu composite powder; and finally, the MXene / Cu composite material with strong interface bonding is obtained through sintering. According to the preparation method, the spontaneous reduction deposition reaction of MXene with high reaction activity and Cu ions is utilized, and the structure and distribution of deposited nano-particles are subjected to interface regulation and control, so that tight interface combination between a copper matrix of the composite material and MXene is realized, inelastic scattering of carriers at an interface is reduced, the interface load transmission capacity is enhanced, and the mechanical property of the composite material is improved. Therefore, the strengthening efficiency of the MXene on the copper matrix is obviously improved; the prepared copper-based composite material has excellent mechanical and electrical properties, the yield strength of the copper-based composite material ranges from 295 MPa to 564 MPa, and the electric conductivity of the copper-based composite material is kept at 84.5%-94.5% IACS (International Annealed Copper Standard). The composite material is simple in preparation process and low in cost, and has the potential of large-scale industrialization.

The invention provides a multi-layer metal composite molded product, the multi-layer metal composite molded product has a multi-layer structure, a bonding layer is arranged between a first layer and a second layer and forms metallurgical bonding with the first layer and the second layer respectively, and the first layer forms interface bonding with the second layer through the bonding layer. By implementing each embodiment of the multi-layer metal composite molded product, the processing difficulty and the manufacturing cost of the multi-layer metal composite molded product can be reduced.

The invention discloses a nano-modified fiber reinforced 3D printing magnesium phosphate cement-based material as well as a preparation method and application thereof. The material is prepared from the following components in parts by weight: 40 to 70 parts of dead burned magnesium oxide, 10 to 25 parts of basic hydrogen phosphate, 5 to 25 parts of silica fume, 30 to 60 parts of fine aggregate, 10 to 30 parts of water, 0.1 to 1 part of fiber dispersing agent and 0.5 to 5 parts of nano modified fiber, the surface activity of the fiber is remarkably improved through a nano modification process, active SiO2 sites attached to the surface of the fiber are activated by using an alkali solution, and a hydration product is generated in situ, so that the interface bonding strength between the fiber and a cement matrix is enhanced, and the surface strength of the fiber is improved by relying on the high-rigidity characteristic of the fiber. The yield stress, thixotropic property and constructability of the material are effectively improved, structural deformation in the printing process is remarkably inhibited, and the 3D printing material has excellent rheological property, strengthened mechanical property and tough fiber-matrix interface bonding property.

The invention belongs to the technical field of injection molding products, and particularly relates to a double-color injection molding product anti-falling rubber coating structure which comprises a base body and a rubber coating layer coating the surface of the base body, a plurality of triangular inverted-buckle protrusions are arranged on the surface of the base body, and embedded grooves matched with the triangular inverted-buckle protrusions are formed in the corresponding positions of the rubber coating layer. Two base angles of each triangular inverted buckle bulge face the direction of the rubber coating layer, and a vertex angle is in acute angle connection with the surface of the base body. The interface bonding force between the rubber coating layer and the base body is remarkably enhanced through geometric interlocking design, a mechanical meshing structure is formed by the triangular back-off protrusions on the surface of the base body and the embedded grooves of the rubber coating layer, the peel strength of the triangular back-off protrusions and the embedded grooves of the rubber coating layer is improved by 30%-50% compared with a traditional plane structure, and the problem that the rubber coating layer is prone to falling off is effectively solved; meanwhile, the inverted buckle structure and the base body are subjected to synchronous injection molding, additional machining steps are not needed, the production process is simplified, and the production cost is reduced.

The invention belongs to the field of metal-based composite materials, and provides a copper-containing diamond composite material and a preparation method and application thereof. The design that an in-situ zigzag TiC interface layer and a titanium-copper gradient transition layer are sequentially formed on the surfaces of diamond particles is adopted, the thickness of the TiC interface layer ranges from 85 nm to 120 nm, the thickness of the titanium-copper gradient transition layer ranges from 172 nm to 1600 nm, the titanium-copper gradient transition layer is divided into a titanium-rich area, a gradient area and a copper-rich area, and the volume fraction of diamond ranges from 20% to 50%. The preparation method comprises the steps of hydrogen plasma etching pretreatment, gradient layer preparation through magnetron co-sputtering, staged temperature control sintering and post-treatment. According to the copper-diamond composite material, excellent heat conduction and mechanical properties are achieved, the zigzag interface layer and the gradient transition layer form an interlocking structure, interface bonding is effectively enhanced, the problems that a traditional copper-diamond composite material is weak in interface bonding and insufficient in performance are solved, and the copper-diamond composite material has wide application value.

The invention provides a fiber reinforced resin composite material and a preparation method thereof, composite resin and a protective product. The fibers are subjected to surface roughening and / or active groups are introduced to form modified fibers, and the active groups comprise one or more of hydroxyl, alkenyl, alkynyl, amino and halogen; coating the surfaces of the modified fibers with a thermoplastic resin solution grafted with maleic anhydride groups and / or epoxy groups, and performing heat treatment to form a first functional layer; nano particles are attached to the surface of the first functional layer and / or a supramolecular network structure is formed, and a second functional layer is formed. According to the preparation method, the interface bonding performance between the fiber and the resin is remarkably improved, and the prepared fiber-reinforced resin composite material has excellent strength, barrier performance, protection performance and the like.

The invention relates to a glass fiber impregnating compound, a low dielectric glass fiber and a cyanate ester resin-based wave-transparent composite material, and belongs to the technical field of glass fiber impregnating compounds, the glass fiber impregnating compound comprises the following components by mass: 35-50 parts of a low molecular weight epoxy emulsion, the molecular weight of epoxy resin in the low molecular weight epoxy emulsion being 400-600; 5-15 parts of a high molecular weight epoxy emulsion, wherein the molecular weight of epoxy resin in the high molecular weight epoxy emulsion is 5000-8000; 5-10 parts of a low molecular weight polypropylene emulsion, wherein the molecular weight of polypropylene in the low molecular weight polypropylene emulsion is 2000-3000; 20 to 25 parts of a lubricant; 15-20 parts of a silane coupling agent, wherein the silane coupling agent comprises a main silane coupling agent and an auxiliary silane coupling agent; and 0.1 to 0.3 part of graphene. The impregnating compound provided by the invention has good compatibility and interface bonding strength with a cyanate ester resin matrix.

The utility model belongs to the field of thermoplastic composite material, specifically discloses a paddle. The utility model's paddle uses short fiber reinforced resin as the outer skin, and the core material formed by the cooperation of the inside continuous fiber reinforced unidirectional tape forms the multi-scale fiber reinforced interface at the interface of the outer skin and the core material, improves the high and low temperature impact resistance of the paddle, reduces the risk of low temperature brittle fracture, enhances the interface bonding force of the paddle core material and the outer skin, reduces the influence of interlayer shrinkage stress, reduces the risk such as interface delamination, bulging and paddle deformation, and improves the mounting of the paddle.

This invention discloses a bimetallic composite self-lubricating bushing and its preparation method, comprising an outer layer and an inner layer. The outer layer is made of steel, and the inner layer is made of copper alloy. The inner wall of the outer layer is provided with multiple mating grooves, which are arranged in multiple layers along the axial direction of the outer layer. Adjacent mating grooves are spaced apart, and each layer includes multiple annularly spaced mating grooves. The inner layer is located within the mating grooves. Each mating groove includes a tip and a tail. The tips of adjacent mating grooves face opposite directions, and the distance between two adjacent mating grooves is the same as the groove width. The multi-layer mating groove structure of this invention, through centrifugal casting, achieves bimetallic interlocking and increases the metallurgical bonding area of ​​the staggered triangular straight mating groove structure with adjacent layers of tips facing opposite directions, significantly improving the interfacial bonding force of the bimetallic composite bushing.

The utility model relates to the technical field of composite material preparation, in particular to a thin-wall composite material plate structure with a hollow runner inside, which is formed by co-curing an upper composite material panel, a lower composite material panel and a runner layer clamped between the upper composite material panel and the lower composite material panel through resin, the problems that in a traditional technology, a flow channel is prone to being blocked, and interface bonding is weak are solved, and the heat pipe has the advantages of being good in structural integrity, excellent in sealing performance, light in weight and high in strength and is particularly suitable for heat management structural parts in the fields of aerospace, new energy automobiles, high-end equipment and the like.

The invention discloses a preparation method of an ultra-light ablation-resistant composite material with a gradient structure, and belongs to the technical field of composite material preparation. In order to solve the technical problem that a traditional material is difficult to consider low density, heat insulation property and ablation resistance at the same time, vermiculite nanosheets and water-soluble phenolic resin are compounded in a solution state, a three-dimensional porous matrix is constructed by adopting directional freeze drying, the surface of the matrix is coated with a ceramic precursor, and then high-temperature cracking is performed to form a compact ceramic layer; and gradient transition from the internal porous structure to the outer ceramic layer is realized. The ablation-resistant composite material with the gradient structure, which is low in density, excellent in heat insulation performance, enhanced in ablation resistance and high in interface bonding strength, can be obtained.

The present invention provides a polytetrafluoroethylene sealing material and a preparation method thereof, and belongs to the technical field of sealing materials, the polytetrafluoroethylene sealing material comprises the following components by weight: 100 parts of polytetrafluoroethylene and 10-40 parts of a filler, and the filler comprises boron nitride and a polyvinylidene fluoride coating layer coating the surface of boron nitride. The boron nitride filler with the surface coated with polyvinylidene fluoride is introduced into a polytetrafluoroethylene matrix, so that the comprehensive performance of the sealing material is remarkably improved. The wear resistance is greatly enhanced by boron nitride through a pinning effect, and a constructed high-thermal-conductivity network can effectively export friction heat, so that the interface temperature is lower than the glass transition point of polytetrafluoroethylene to maintain rigidity; meanwhile, the polyvinylidene fluoride coating layer realizes covalent crosslinking through dehydrofluorination reaction with polytetrafluoroethylene, so that the mechanical strength and the interface bonding force of the material are remarkably improved.

It provides a preparation method of solid-liquid composite casting in a specific mold to produce the heterostructured metallic bars composed of high elastic modulus metal and low elastic modulus Mg alloy. Subsequently, the microstructure of heterogeneous Mg alloys bars is adjusted by the specific deformation and heat treatment. Heterogeneous Mg alloys bars without oxide inclusions and with good interfacial bonding were prepared through this method. The improvement of elastic modulus is obtained by tailoring the heterogeneous microstructure.

The invention belongs to the technical field of functional polymer materials, and particularly discloses a composite material with a self-repairing function and a preparation method and application thereof. Specific functional groups are respectively introduced to the surfaces of the carbon nanotubes and the boron nitride, so that interface bonding between the carbon nanotubes and the boron nitride and a matrix is enhanced, the mechanical strength of the composite material is improved, the composite material has a certain effect of preventing generation of cracks, and meanwhile, when the cracks are generated in cooperation with the core-shell structure capsule in the composite material, the core-shell structure capsule has a good anti-cracking effect. The self-repairing effect of cracks is effectively improved, so that the composite material has an efficient self-repairing function and good mechanical properties, and the service life of the composite material is prolonged.

The invention relates to a method, a device and equipment for determining interface bonding energy of peelable ultrathin copper foil, a medium and a product. The method comprises the following steps: acquiring pressure intensity applied to an ultrathin copper foil by a hydraulic pump detected by a hydraulic sensor in the hydraulic pump at multiple times, acquiring a three-dimensional image of the ultrathin copper foil acquired by a three-dimensional visual system at each time, and determining the center point deflection of the ultrathin copper foil at each time based on the three-dimensional image at each time, and according to the pressure intensity corresponding to each time and the central point deflection, determining a critical pressure intensity from each pressure intensity, determining a critical central point deflection corresponding to the critical pressure intensity from each central point deflection, and according to the critical pressure intensity, the critical central point deflection and an interface bonding energy model, determining the interface bonding energy of the strippable ultrathin copper foil. And the accuracy of determining the interface bonding energy of the strippable ultrathin copper foil is improved.

This application relates to biodegradable magnesium metal composite materials, their preparation methods, and medical devices. The preparation method of the biodegradable magnesium metal composite material includes the following steps: performing a first treatment on the surface of a magnesium metal matrix using an alkali agent to form a magnesium hydroxide passivation layer; performing a second treatment on the magnesium hydroxide passivation layer using phosphorylated amino acids to form a mineralization-inducing layer; and depositing a calcium-phosphorus coating on the surface of the mineralization-inducing layer to prepare the biodegradable magnesium metal composite material. The biodegradable magnesium metal composite material prepared by this method can meet the requirements of long-term corrosion resistance, strong interfacial bonding, and biocompatibility.

This invention relates to the field of friction materials technology, specifically a friction material with excellent formability and its preparation method. The raw materials for this friction material include allyl phenolic resin, bismaleimide, a photoinitiator, thiol-modified fillers, and additives; the fillers include reinforcing fillers, friction-increasing fillers, and friction-reducing fillers. This invention effectively improves the compatibility between the filler and resin, reduces the viscosity of the mixture, and significantly improves the flowability during hot pressing by grafting bismaleimide onto the surface of the thiol-modified reinforcing filler. This invention utilizes the bifunctional characteristics of bismaleimide to construct a three-dimensional interpenetrating network with the filler as nodes, achieving higher interfacial bonding strength than traditional coupling agent treatment while using less than 15wt% resin. In the interpenetrating network formed by this invention, the imide ring structure of bismaleimide endows the material with excellent thermal stability, preventing interface debonding at high temperatures, maintaining a stable coefficient of friction, and exhibiting excellent resistance to thermal degradation.