84 results about "Elastic matrix" patented technology

The invention relates to the technical field of battery materials, and discloses a modified diaphragm, a preparation method thereof and a negative-electrode-free sodium metal battery. The modified diaphragm comprises a base membrane and a first functional layer arranged on one side of the base membrane; the first functional layer comprises an isotropic elastic matrix and inorganic nanoparticles distributed in the elastic matrix, and the mass ratio of the inorganic nanoparticles to the elastic matrix is (150-200): (100-125). The modified diaphragm can uniformly buffer the huge expansive force of the non-cathode sodium battery, so that the permeation of sodium metal into pores of the diaphragm is inhibited, and the occurrence of short circuit of the battery is avoided.

The invention discloses a metal sealing butterfly valve, relates to the field of butterfly valves, and solves the contradiction between leakage and operation torque. The valve seat assembly comprises a main sealing ring, an auxiliary sealing ring and a pressing ring. The main sealing ring and the auxiliary sealing ring are coaxially arranged, and the main sealing ring is closer to the valve rod than the auxiliary sealing ring. Each of the main sealing ring and the auxiliary sealing ring comprises a spiral spring, the spiral springs are connected end to end to form a ring, and the peripheral surfaces of the spiral springs are coated with metal sheets; the main sealing ring makes contact with the butterfly plate to form sealing fit when the butterfly plate is closed, and the auxiliary sealing ring extrudes the main sealing ring under forward impact of a medium and makes contact with the butterfly plate to form sealing fit. The spiral spring is connected end to end to form an annular structure to serve as an elastic base body, the elastic deformation capacity similar to that of rubber is provided for the sealing ring, the metal sheet wrapping the periphery is matched, the high-temperature-resistant and high-pressure-resistant characteristics of metal materials are reserved, tight attachment of the sealing face is achieved through elastic compensation of the spring, and the leakage-proof capacity is improved.

The invention discloses a stretchable conductive fiber with high conductivity and high electrical stability. The stretchable conductive fiber is composed of an elastic base body with a spiral groove structure on the surface and a conductive metal cladding loaded on the surface of the elastic base body. The conductive metal cladding comprises nano-silver wrapping the elastic base body and liquid metal filling the spiral groove structure, wherein the nano-silver and the liquid metal are arranged in sequence. The continuous preparation method comprises the following steps: preparing an elastic matrix preform with an open groove in the side surface; filling and coating the elastic matrix preform with a thermoplastic hard polymer, and carrying out vacuum heat treatment to obtain a composite preform; continuously heating and wiredrawing the composite preform, and synchronously rotating the composite preform in the wiredrawing process to obtain composite fibers; removing a thermoplastic hard polymer component in the composite fiber to obtain an elastic matrix with a spiral structure on the surface; and sequentially loading nano-silver and liquid metal on the surface of the elastic substrate with the spiral structure on the surface to obtain the stretchable conductive fiber.

The present application belongs to the technical field of structure optimization design, and discloses a macro-micro double-scale structure topology optimization method and equipment capable of controlling the minimum size of microstructure, comprising the following steps: (1) interpolating the elastic matrix and the corresponding density of the actual microstructure in the offline database by using radial basis function interpolation, and then constructing a mapping model; (2) constructing a compliance minimization optimization model, wherein the design variables of the optimization model are the cutting height of two virtual microstructures in each unit and the topology variable, and the constraint functions are the volume fraction of the overall structure and the topology variable constraint; (3) calculating the sensitivity of the objective function and the constraint function to the design variable, and then updating the design variable; (4) when the compliance error of the updated double-scale structure meets the optimization termination condition, the optimization is completed and the double-scale structure meeting the requirements is obtained; otherwise, go to step (3). The present application solves the problems of low calculation efficiency and poor connectivity.

This invention provides a phosphorus-containing flame retardant, its preparation method and application, and a resin composition and its application, specifically relating to the field of polymer materials technology. The phosphorus-containing flame retardant provided by this invention achieves an integrated design of the flame-retardant unit and the elastic matrix at the molecular scale by directionally and controllably grafting phosphorus-containing groups M onto the active sites of the polybutadiene soft segments in a styrene-butadiene-styrene block copolymer via covalent bonds. This structure retains the inherent high flexibility, impact resistance, and processing rheological properties of the styrene-butadiene-styrene block copolymer while imparting intrinsic, durable, and uniformly distributed flame-retardant capabilities to the material. Simultaneously, because the phosphorus element is anchored to the polymer backbone / side chain, no small molecule polar impurities are introduced, significantly suppressing dielectric polarization loss and hygroscopicity increases. This provides a structural basis and performance guarantee for the subsequent construction of a high-end thermosetting resin system for copper-clad laminates with low Dk / Df, high Tg, and low CTE.

This invention relates to the fields of microelectromechanical systems (MEMS) and new energy technologies, and discloses a piezoelectric energy harvester based on a nonlinear gradient negative Poisson's ratio structure. Its elastic matrix has a fixed end and a free end, with a negative Poisson's ratio structural segment on it. The piezoelectric transducer element is bonded to the surface of the negative Poisson's ratio structural segment via an epoxy resin adhesive layer. The core innovation lies in the nonlinear monotonically decreasing thickness of the elastic matrix from the fixed end to the free end along its length. This change profile is defined by a specific cubic polynomial function, which can accurately approximate the theoretical model of an isostress beam, making the stress distribution on the matrix surface tend to be uniform during vibration. Simultaneously, the lateral expansion characteristics of the negative Poisson's ratio structural segment and the longitudinal stress enhancement effect of the nonlinear thickness synergistically amplify the charge output of the piezoelectric element. This invention significantly improves the utilization efficiency of piezoelectric materials and the power density of the energy harvester, and has the advantages of compact structure, high energy conversion efficiency, and mass production via 3D printing.

The application provides an isometric topology optimization method and device based on thermal elastic metamaterial design, and relates to the field of isometric topology optimization. The method comprises the following steps: constructing a multi-material interpolation model corresponding to the thermal elastic metamaterial, and obtaining a plurality of groups of density distributions corresponding to a plurality of solid materials in the thermal elastic metamaterial design domain according to the multi-material interpolation model, one solid material corresponding to one density distribution; obtaining the relationship interpolation between the plurality of groups of density distributions, and obtaining the elastic modulus and the thermal expansion coefficient according to the relationship interpolation; calculating the equivalent elastic matrix corresponding to the thermal elastic metamaterial according to the elastic modulus, and calculating the thermal expansion coefficient matrix corresponding to the thermal elastic metamaterial according to the thermal expansion coefficient; performing discrete form processing on the calculation equations of the equivalent elastic matrix and the thermal expansion coefficient matrix through the isometric grid, constructing a constraint function according to the equivalent elastic matrix, constructing an objective function according to the thermal expansion coefficient matrix, and calculating the sensitivity information corresponding to the first design variable through the objective function and the constraint function; updating the first design variable according to the sensitivity information until the thermal expansion coefficient meets the convergence condition, and obtaining the second design variable when the convergence condition is met through the isometric topology design model of the negative thermal expansion metamaterial; and optimizing the thermal elastic metamaterial according to the second design variable. The application solves the problem that the finite element method is difficult to guarantee the efficient and high-precision design of the thermal elastic metamaterial when dealing with complex geometric structures.

This application relates to a data analysis device and a data analysis method. The data analysis device includes: a controller configured to: perform calculations based on impact simulation data of a target step using a finite element method (FEM) main program to obtain target strain parameters and target stress parameters; transmit the target strain parameters and target stress parameters to a custom subroutine; extract the maximum principal strain and maximum shear strain from the target strain parameters using the custom subroutine; determine the current target state of the porous foam material based on the maximum principal strain, where the target state is either tensile or compressive; obtain the initial stress corresponding to the target step from the target stress parameters; update the initial stress based on the maximum principal strain, maximum shear strain, and the elastic matrix, hardening matrix, and rate-sensitive matrix corresponding to the target state; and output the updated initial stress to the FEM main program so that the FEM main program can perform the next iterative calculation.

The invention relates to the technical field of composite material structure design, in particular to a reversible clamping structure shell and a manufacturing method thereof. The reversible clamping structure shell comprises a fiber composite material body which is of a composite structure formed by overlapping a reinforcement body layer and an elastic base body layer, the reinforcement body layer is formed by regularly arranging continuous fibers, and the elastic base body layer is formed by regularly arranging crossed fibers; the fiber composite material main body is provided with a buckling guide groove which is distributed in the stress direction of the fiber composite material main body, and the buckling guide groove is of a concave structure formed by pressing the surface of the shell; when external force is applied to the fiber composite material main body and the displacement reaches a preset value, the buckling guide groove guides the main body to generate controllable deformation and is switched to a stable stress state to realize clamping; after the external force is removed, the fiber composite material main body automatically rebounds to an initial state; or the fiber composite material main body is separated from the clamping under the influence of another external force in the opposite direction and rebounds to the initial state.

The invention belongs to the related technical field of structural topological optimization, and discloses a topological optimization method and equipment for a continuous carbon fiber reinforced composite material, and the method comprises the steps: S1, predicting the mechanical properties of a material at a bending printing path based on a mesoscopic representative volume element, and building a mapping relation between the curvature of the printing path and the corresponding mechanical properties of the material; s2, introducing relative density and a material direction angle for each unit to obtain a structural flexibility function containing the two design variables, and calculating an equivalent elastic matrix; s3, calculating to obtain the material mechanical property corresponding to the current unit based on the mapping relation, and updating the material mechanical property of the current unit; and S4, constructing a topological optimization model, and carrying out topological optimization by adopting the topological optimization model to obtain an optimal topological configuration. According to the method, the curvature generated by fibers induced by a bending printing path is combined, parameters are dynamically adjusted and optimized by introducing fiber curvature constraints, and the mechanical property of a final structure is remarkably improved.

The invention provides a high-fatigue-resistance high-response high-elastic fiber material and a preparation method thereof. The high-fatigue-resistance high-response high-elastic fiber material comprises a liquid crystal functional phase, the high-fatigue-resistance high-response high-elastic fiber material further comprises a thermoplastic polymer elastic matrix phase, and the thermoplastic polymer elastic matrix phase and the liquid crystal functional phase construct a modulus smooth transition gradient layer on a two-phase interface through gradient coupling and topological interlocking. The modulus smooth transition gradient layer is used for efficiently transmitting strain and smoothly dissipating stress; wherein the weight-average molecular weight (Mw) of the thermoplastic polymer elastic matrix phase is 8.2 * 10 < 4 > g / mol to 2.5 * 10 < 5 > g / mol; by mass, the usage amount of the thermoplastic polymer elastic matrix phase is 50-90 parts. The fiber material with high fatigue resistance, high response and high elasticity has efficient stimulation responsiveness, high elasticity and toughness and excellent fatigue resistance, and is better adapted to dynamic application scenes such as intelligent fabrics, wearable equipment and flexible actuators.

This invention belongs to the field of inorganic solid-state luminescent materials technology, and discloses a green mechanoluminescent composite elastic material and its preparation method, comprising an elastic matrix and a green mechanoluminescent phosphor dispersed in the elastic matrix, wherein the chemical formula of the green mechanoluminescent phosphor is Ba. 0.79 Al 10.9‑x O 17.14 :xMn 2+ (0 < x ≤ 0.35). This green mechanoluminescent composite elastomer still exhibits bright green mechanoluminescence after more than 15,000 tensile cycles. By writing characters on the composite elastomer and mapping the luminescence intensity to different colors, the color changes caused by different stress magnitudes can be clearly observed. This indicates that the prepared mechanoluminescent composite elastomer has great potential in applications such as electronic signatures, anti-counterfeiting, and structural health monitoring.

The invention provides a conductive diaphragm and a loudspeaker. The conductive vibrating diaphragm comprises a main body layer and a conductive layer arranged on the main body layer, the conductive layer comprises an elastic matrix and a conductive filler dispersed in the elastic matrix, and the conductive layer comprises the following components in parts by mass: 8-20 parts of the elastic matrix, 76-95 parts of the conductive filler and 0.1-3 parts of a modifier. The conductive filler comprises a nano metal conductive filler and a micro-nano conductive filler. Compared with the prior art, the conductive layer of the conductive vibrating diaphragm adopts the elastomer with good high and low temperature modulus stability as the elastic matrix, the nano metal conductive filler with the melting point lower than 200 DEG C is blended with the micro-nano conductive filler to serve as the conductive functional body, and the conductive functional bodies in the conductive layer are welded together; and the elastic matrix can effectively avoid the problems of sudden rigidity change, poor material toughness and the like of the conductive vibrating diaphragm, so that both conductivity and smoothness are realized.

Conveyor system units configured to form part of a circulating conveyor system and a circulating conveyor system comprising conveyor system units are disclosed. The conveyor system unit (10) comprises a first slab (11) and a second slab (12), and each slab has a support surface (13) having a first and a second long side edge portion (21, 22) and two short side edge portions (23). The first and second slabs are arranged side by side relative to each other and are interconnected by an elastic matrix (30) extending across the support surface (13). Each conveyor system unit (10) further comprises a support side wall (24) arranged at each short side edge portion (23) of each slab, the support side walls (24) arranged on the same short edge side of the conveyor system unit (10) are interconnected by an elastic matrix wall (324, 324') extending across the support side walls (24).

The invention provides a magnetoelastomer and a preparation method thereof. The magnetoelastomer comprises a first magnetoelastomer film layer, a second magnetoelastomer film layer and a middle elastic layer, wherein each of the first magnetoelastomer film layer and the second magnetoelastomer film layer comprises an elastic matrix and magnetic powder particles dispersed in the elastic matrix. According to the magnetoelastic body, through the structural design of three-dimensional directional arrangement of the magnetic poles, the repulsive force of the same-polarity magnetic poles and the attractive force of the opposite-polarity magnetic poles are utilized, and dynamic compensation of energy loss is achieved when mechanical deformation of materials occurs. The technical effects that the bidirectional hysteresis effect of the magnetoelastomer in the longitudinal compression direction and the transverse stretching direction is remarkably reduced, the rebound resilience and the reversible deformation capacity of the material are improved, and the problem of performance degradation of the magnetoelastomer under long-term dynamic / static load is solved.

The invention discloses a temperature-sensing color-changing insulating sheath, an installation tool and a use method thereof, and the temperature-sensing color-changing insulating sheath comprises a temperature-sensing color-changing microcapsule and an elastic substrate with cold contraction performance. And the temperature-sensing color-changing microcapsules are uniformly dispersed in the elastic matrix. According to the invention, the installation tool is matched with the temperature-sensing color-changing insulating sheath, so that the temperature-sensing color-changing insulating sheath can be quickly connected with the wiring terminal, a disposable bracket in a cold shrink tube is replaced, the production process is simplified, the use cost is reduced, and meanwhile, an operator can intuitively obtain the heating condition of a cable.

A transformer stacked iron core elasticity matrix determination method includes a step of calculating a frequency spectrum of a vibration response function for a first provisional value and a second provisional value of transverse elastic moduli, a step of calculating a degree of coincidence between a frequency spectrum of noise and a frequency spectrum of excitation vibration for each combination of the first provisional value and the second provisional value, and adopting the first provisional value and the second provisional value when the degree of coincidence is a local maximum value as the transverse elastic moduli. The step of calculating the frequency spectrum of the vibration response function includes a step of calculating the frequency spectrum of the vibration response function for trial points distributed at a first interval in a two-dimensional space of the first provisional value and the second provisional value, and a step of calculating a frequency spectrum for the trial points distributed at a second interval by a numerical interpolation process.

The application provides a conductive diaphragm and a loudspeaker. The conductive diaphragm comprises a main body layer and a conductive layer arranged on the main body layer, the conductive layer comprises an elastic matrix and a conductive filler dispersed in the elastic matrix, and the composition of the conductive layer is as follows: the elastic matrix is 8-20 parts, the conductive filler is 76-95 parts, and a modifier is 0.1-3 parts. The conductive filler comprises a nano metal conductive filler and a micro-nano conductive filler. Compared with the prior art, the conductive layer of the conductive diaphragm has good modulus stability at high and low temperatures, the nano metal conductive filler with a melting point lower than 200 DEG C is blended with the micro-nano conductive filler as a conductive functional body, the conductive functional bodies in the conductive layer are fused with each other to form a stable conductive network, and the elastic matrix can effectively avoid problems such as sudden change of rigidity of the conductive diaphragm and poor material toughness, so that the conductivity and smoothness are considered.

The invention relates to the technical field of continuous and non-continuous fiber reinforced composite materials, and particularly discloses a high-elasticity composite fiber preparation method and a high-elasticity composite fiber preparation device.The high-elasticity composite fiber preparation method comprises the following steps that S1, oil stains and auxiliaries on the surfaces of raw material fibers are removed, and then the interface bonding force of the raw material fibers and an elastic matrix is improved through plasma treatment or coating of a coupling agent; s2, the surface of the elastic base body raw material is cleaned, and moisture in the base body raw material is removed through a vacuum drying box; and S3, the treated matrix raw materials are poured into a weightlessness scale feeding machine, and raw material fibers are poured into a fiber feeding machine. A matrix raw material is drained by the inclined surface of the cone and the arc-shaped surface of the guide sheet, so that the matrix raw material is conveniently separated from the separator, the adding and mixing work of fibers is forced to be transferred into the mixing cover to obtain an independently mixed cavity, the fibers are effectively prevented from directly contacting functional elements, and the mixing efficiency is improved. And the problems of damage to the surfaces of the screw flights and the screw grooves and carbonization adhesion are greatly reduced.

The application discloses a kind of equivalent continuum modeling method and system of floating body structure. Method includes: by structure representative unit (SRE) method, complex structure is equivalent to anisotropic structure continuum medium, the elastic matrix analytical model is established for the elastic stage of structure continuum medium, and anisotropic elastoplastic model and yield criterion are established for its elastic-plastic stage;Combining computational fluid dynamics (CFD) and finite element method (FEM) constructs two-way FSI coupling framework, realizes wave-structure-component coupling mechanism and whole-process efficient simulation from elastic response to plastic failure.The application overcomes the problem that the equivalent model based on structure mode in traditional fluid-solid coupling analysis cannot characterize interface continuity-anisotropic coupling and cannot predict limit failure behavior, and the elastic-plastic stage can accurately capture plastic initiation and damage evolution, and is suitable for fluid-structure coupling design, hydrodynamic performance optimization and limit bearing capacity evaluation of floating structure.

The present invention discloses a finite element analysis method, apparatus, equipment, and storage medium for stiffening plate units, relating to the field of finite element analysis and calculation. The method includes establishing a local coordinate system oxyz of the plate unit with the mid-surface of the stiffening plate unit as a reference; calculating the plane equivalent thickness and bending equivalent thickness of the stiffening plate unit in the x-axis and y-axis directions; calculating the plane stress unit elastic modulus and the bending plate unit elastic modulus of the stiffening plate unit in the x-axis and y-axis directions to construct a plane stress unit elastic matrix and a bending plate unit elastic matrix; and constructing a plane stress unit stiffness matrix and a bending plate unit stiffness matrix based on the plane stress unit elastic matrix and the bending plate unit elastic matrix to calculate the internal forces and stresses of the plane stress unit and the bending plate unit. The present application can accurately and efficiently perform finite element analysis of stiffening plate units, meeting engineering requirements.

The invention discloses an intelligent damping material prepared from a piezoelectric ceramic complex and a preparation method of the intelligent damping material, and belongs to the technical field of vibration control materials. The material is of a three-layer composite structure including an elastic matrix layer, a piezoelectric ceramic composite layer and a restraint layer, wherein the piezoelectric ceramic composite layer is formed by compounding 30%-50% of piezoelectric ceramic particles, 5%-15% of conductive filler and 35%-65% of a polymer binder; the shore hardness of the elastic matrix layer is 30D-60D, and the elastic modulus of the restraint layer is 20GPa-80GPa. The preparation method comprises the key steps of piezoelectric ceramic particle silane coupling agent modification, composite slurry high-speed mixing, elastic matrix layer vulcanization molding, matrix surface plasma treatment, gradient hot-pressing composite curing and the like. Through interface modification and three-dimensional conductive network construction, the interface bonding strength and energy dissipation efficiency are greatly improved, the damping loss factor tan delta of the material is larger than or equal to 0.3 in the wide temperature range of-50 DEG C to 150 DEG C, the vibration attenuation rate of the material is larger than or equal to 40%, the material is suitable for vibration control of aerospace, rail transit and precision machinery, the preparation process is simple and convenient, and large-scale production is easy.

The invention discloses an elastic piezoresistive material and an environment-friendly preparation method thereof, and belongs to the technical field of flexible electronics. The elastic piezoresistive material is prepared from an elastic matrix and a conductive filler dispersed in the elastic matrix; wherein the elastic matrix is composed of polyurethane, polyacrylic acid and polyethylene glycol, and the conductive filler is a carbon nanotube. The preparation method comprises the following steps: adding a carbon nanotube aqueous dispersion into a polyacrylic acid aqueous emulsion, and uniformly stirring to obtain a dispersion A; dissolving polyethylene glycol in deionized water to obtain a solution B; adding a polyurethane water-based emulsion into the solution B, and uniformly stirring to obtain a mixed solution C; uniformly mixing the dispersion liquid A and the mixed liquid C to obtain a mixed liquid D; and carrying out molding and drying treatment on the mixed solution D to obtain the elastic piezoresistive material. The mechanical and electrical properties of the elastic piezoresistive material provided by the invention can be regulated and controlled according to specific application requirements, the whole process can be operated in a room-temperature air environment, no organic solvent is used, and the preparation method is environment-friendly, economical, simple and feasible, and has very high practical value.

The invention belongs to the technical field of fishery measuring tools, and particularly relates to a portable fish measuring ruler which comprises a containing cylinder, a rotating rod is rotationally connected to the interior of the containing cylinder through a bearing, a winding roller is fixed to the rod wall of the rotating rod, a fish measuring ruler body is fixed to the side wall of the winding roller, and scale marks are arranged on the upper side of the fish measuring ruler body. A limiting baffle plate is fixed at the left end of the fish measuring ruler main body; the fish measuring ruler comprises a fish measuring ruler main body, the fish measuring ruler main body is made of a soft carbon fiber composite material, the soft carbon fiber composite material is formed by compounding carbon fiber filaments and a thermoplastic polyurethane elastic matrix, and the surface of the soft carbon fiber composite material is coated with a waterproof nano coating, the fish measuring ruler main body is made of the soft carbon fiber composite material, and the problems of rusting and deformation of a traditional material are solved; through the high-precision laser engraving technology, long-term clearness of scales is guaranteed, abrasion is avoided, the waterproof, high-temperature-resistant and impact-resistant performance is achieved, the device adapts to the complex working environment, soft materials can be curled and stored, and the requirement for the storage space is lowered.

The invention belongs to the technical field of mechanical luminescent materials, discloses an efficient mechanical luminescent flexible composite material based on HNTs regulation and a preparation method thereof, and aims to solve the problem that the luminescent intensity of a mechanical luminescent material in the prior art cannot meet requirements. HNTs are modified by using a silane coupling agent, and SCA-HNTs powder is obtained; znS: Cu and SCA-HNTs powder are dispersed in an ethanol solution, low-temperature drying is performed to obtain ZnS: Cu-HNTs luminescent powder, the luminescent powder and a prepolymer are mixed, vacuum treatment, degassing and curing are performed to obtain the efficient mechanical luminescent flexible composite material, and the mechanical luminescent property of ZnS: Cu in an organic polymer elastic matrix can be improved. The luminous intensity and stability are improved, and the application prospect in the fields of anti-counterfeiting and artificial intelligence sensing is widened. And the elastic modulus of the flexible composite material is improved.

The present invention belongs to the field of new materials and discloses a bio-based strain sensor, which includes a bio-based polyurethane film and a graphene fabric attached to the surface of the film. This strain sensor uses the bio-based polyurethane film as an elastic matrix and can exhibit more excellent response time, recovery time, and resistance stability under different working conditions compared to strain sensors with petroleum-based polyurethane or polyurethane-urea as the matrix. At the same time, the present invention also discloses a preparation method for this strain sensor.

The invention discloses a concrete protective coating and a preparation method thereof. The concrete protective coating comprises a composite structure consisting of an elastic polymer matrix and a functional filler dispersed in the elastic polymer matrix, the functional filler comprises a reflective filler for reflecting sunlight and a radiation filler for radiating infrared rays; the reflective filler comprises titanium dioxide, and the radiation filler comprises silicon dioxide; the elastomeric polymer matrix is used to integrate and carry reflective and radiative fillers. Through the implementation of the invention, the problem of performance degradation easily occurring in traditional physical blending is avoided, more importantly, the elastic matrix provides an ideal stress buffer and distribution environment for the functional filler, the reflection and radiation performance of the coating is still kept stable under the dynamic deformation of the concrete, and the service life of the coating is prolonged. Therefore, long-term synergistic interaction of cooling and anti-cracking functions is realized, and the technical bottleneck that the performance of a single-function coating is not lasting and cannot be considered at the same time is broken through.

The invention discloses an anti-collision powder coating and a preparation method thereof, and relates to the field of coatings. Comprising the following steps: uniformly mixing epoxy resin, a phenolic epoxy curing agent, a methylimidazole catalyst, a partial thermal expansion material, glass fibers, a flatting agent, benzoin and pure polytetrafluoroethylene wax at room temperature to obtain a premix; carrying out melt blending and low-temperature extrusion on the premix to obtain a flaky material; crushing the flaky material into base material powder, and controlling the particle size to be 30-50 microns; and uniformly mixing the base material powder and the residual thermal expansion material under the conditions of normal temperature and low speed to obtain the target powder coating. According to the invention, a dual-buffer network is constructed, so that multi-stage dissipation of impact energy is realized; the special ultrahigh-epoxy-equivalent resin and the special curing agent form a tough and elastic matrix network, so that the coating not only can bear strong impact at the height of 80cm, but also has extreme flexibility of bending through a phi 5mm axis.

The invention relates to the field of vehicle sealing, and particularly discloses a sealing strip, a variable compression load sealing system and a machining technology.The sealing strip comprises a sealing strip body and further comprises a flexible sealing strip body fixedly installed on the side, close to an opponent piece, of the sealing strip body, and the flexible sealing strip body comprises an elastic matrix and a performance adjusting additive; the elastic matrix is chlorinated polyethylene or ethylene propylene diene monomer, and the performance adjusting additive comprises the following components in parts by mass: 2-3 parts of an anti-aging agent, 2-3 parts of a cross-linking agent, 5-50 parts of a plasticizer, 2-5 parts of an activating agent and a filling agent. The mass part of the filling agent is 40-60. According to the scheme, the whole flexible sealing strip body finally has durability and flexibility, the flexible sealing strip body can continuously enable the sealing strip body to be tightly sealed on the opponent piece, and the flexible sealing strip body with large elasticity can improve the attaching sealing performance between the sealing strip body and the opponent piece.

The invention discloses a coating based on a chitosan-dopamine micro-nano structure and a preparation method and application, and belongs to the technical field of biological fouling protection. Amphiphilic hydrogel and polydimethylsiloxane PDMS are compounded, interaction between the two phases is precisely regulated, and the chitosan-dopamine micro-nano structure is prepared. The uniform and stable bionic micro-nano structure is formed through spontaneous induction in the coating curing process. According to the invention, two mechanisms of fouling resistance (realized by a hydrophilic hydration layer) and fouling release (realized by a PDMS elastic matrix) are organically combined, intelligent management and control of antifouling ions are realized through a fixed interface water layer, the interface action efficiency is remarkably improved, and the environmental release amount is greatly reduced; the common phase separation problem of a hydrophilic-hydrophobic composite material is solved, and the composite coating with stable performance and uniform structure is obtained.