103 results about "Biomimetic materials" patented technology

The invention discloses a plant leaf biomimetic material with antifouling, self-cleaning and spectrum simulation properties and a preparation method thereof. The plant leaf biomimetic material sequentially comprises a first liquid injection super-smooth porous elastomer layer, a hydrogel layer, a camouflage yarn-dyed fabric layer, a hydrogel layer and a second liquid injection super-smooth porous elastomer layer from bottom to top, the liquid injection super-lubricity porous elastomer layer is a porous elastomer of which gaps are filled with silicone oil; the first and second liquid injection super-lubricity elastomer layers are made of the same or different materials; the hydrogel layer is one of single-network hydrogel or double-network hydrogel; and the color of the disguise yarn-dyed fabric layer is one of dark green, medium green, yellow green and light green. The plant leaf biomimetic material disclosed by the invention is excellent in plant leaf spectrum simulation effect, can simulate cell tissues of plants, has anti-mud and hydrophobic properties, can still keep the excellent plant leaf spectrum simulation effect after being washed by rainwater, and can realize high-weather-resistance spectrum simulation.

The invention relates to a composition for a biomimetic material and a preparation method of the composition. The composition comprises hydrophobic modified hydroxyapatite, polylactic acid and a hyperbranched star polymer with a hyperbranched polymeric structure as a core and polycaprolactone as an arm. The invention also relates to a product containing the composition for the biomimetic material. According to the application, the hyperbranched star-shaped polymer taking a hyperbranched polymerization structure as a core and polycaprolactone as an arm is creatively introduced into a PLA / HA composite system, and the hyperbranched star-shaped polymer can effectively improve the compatibility among the components and also can reduce the shrinkage rate of the composition for the biomimetic material. The composition for the biomimetic material can be processed to prepare a 3D printing wire rod with good toughness and high surface quality. According to the 3D printing wire rod, through the 3D printing technology, the manufactured bionic support is good in mechanical performance and size stability, and the printing process is smooth.

The present invention discloses a waterborne polyurethane and silica gel composite biomimetic material, its preparation method and application, belonging to the technical field of biomimetic skin. The biomimetic material includes a silica gel layer and a polyurethane layer. The material of the silica gel layer includes two-component silica gel, and the material of the polyurethane layer includes double-bond terminated waterborne polyurethane. The preparation method of the biomimetic material is as follows: Spray the double-bond terminated waterborne polyurethane into a mold, heat and dry it to obtain a polyurethane layer; Spray a platinum catalyst on the surface of the polyurethane layer, then mix the A component and B component of the two-component silica gel evenly and pour them into the mold, oscillate and level them, and cure and form to obtain the waterborne polyurethane and silica gel composite biomimetic material; The biomimetic material has the characteristics of high peel strength, good environmental performance, good folding resistance, high wear resistance, good heat resistance, etc., and especially has a baby-like skin-friendly touch, and has broad application prospects in artificial skin, soft robots, wearable devices, prosthetic epidermis, etc.

The invention discloses a breathable plant leaf biomimetic material with antifouling, self-cleaning and spectrum simulation properties and a preparation method of the breathable plant leaf biomimetic material. The breathable plant leaf biomimetic material can be applied to a base material through a two-step coating method. The first layer is a mesophyll-like porous dual-network hydrogel structure, hyperspectral pigment and moisture absorption salt are dispersed in the first layer, spectral characteristics of plant leaves in visible light and near infrared bands are simulated, and a water transpiration function controlled by plant pores is reproduced through a pore structure and a salt medium, so that stable spectral response and dynamic water exchange are realized; and the second layer is a leaf-skin-imitated coating, and has long-term stable antifouling and self-cleaning characteristics through a liquid-like super-smooth hydrophobic surface structure. The plant leaf spectrum simulation coating has anti-mud and hydrophobic properties, can still keep an excellent plant leaf spectrum simulation effect after being washed by rainwater, and can realize high-weather-resistance spectrum simulation.

The invention discloses a waterborne polyurethane and silica gel composite biomimetic material and a preparation method and application thereof, and belongs to the technical field of biomimetic skin, the biomimetic material comprises a silica gel layer and a polyurethane layer, the silica gel layer is made of two-component silica gel, the polyurethane layer is made of double-bond end-capped waterborne polyurethane, and the two-component silica gel is made of polyurethane. The preparation method of the biomimetic material comprises the following steps: spraying double-bond end-capped waterborne polyurethane into a mold, heating and drying to obtain a polyurethane layer; spraying a platinum catalyst on the surface of the polyurethane layer, then uniformly mixing the component A and the component B of the two-component silica gel, pouring the mixture into a mold, oscillating, paving, curing and forming to obtain the waterborne polyurethane and silica gel composite biomimetic material. The biomimetic material has the characteristics of high peel strength, good environmental protection performance, good folding resistance, high wear resistance, good heat resistance and the like, particularly has a skin-friendly touch feeling like a baby, and has a wide application prospect in the aspects of artificial skin, soft robots, wearable equipment, artificial limb epidermis and the like.

The invention discloses a preparation method of high-toughness physical hydrogel, and belongs to the technical field of hydrogel preparation. The preparation method comprises the following steps: preparing polyvinyl alcohol into a polymer solution, mixing tannic acid and iron ions to prepare a complex solution, blending the two solutions to prepare a flocculation hydrogel of a tannic acid-iron ion complex and polyvinyl alcohol, centrifugally collecting the flocculation hydrogel, pressing the flocculation hydrogel into a sheet material, and drying the sheet material to obtain the tannic acid-iron ion / polyvinyl alcohol composite material. The hydrogel is soaked in a poor solvent for dehydration for mechanical property regulation and control, and then the hydrogel and deionized water are subjected to solvent exchange to obtain the high-strength and high-toughness physical hydrogel. The novel hydrogel material with high strength and high toughness is prepared from cheap and easily available commercial raw materials through a simple blending and efficient mechanical property reinforcing and toughening strategy, and the prepared material realizes unification of strength and toughness, and has important application prospects in multiple fields such as biomimetic materials, flexible electronics and energy.

The present invention discloses a smart bio-inspired material design platform to satisfy multi-objective material design featuring complex microstructure for the future. the platform sets mechanical properties of a simulative material element via establishing a reduced model. A distribution of the simulative material element is simulated so as to output a material simulative parameter. A deep learning framework is combined in the platform for computing and evaluating an optimal material design that meets a target material parameter. Specifically, the reduced model can be based on data provided by any test of material mechanical properties, and the deep learning framework evaluates whether a biomimetic material design meets demand of the optimal target material parameter according to a standardized reward function model. The platform is applicable to multi-objective simulative material design, and is greatly potential for futuristic applications.

The invention belongs to the technical field of biomimetic materials, and discloses a titanium alloy implant surface biomimetic coating and a preparation method thereof.The biomimetic coating comprises a porous titanium support layer, a micron-sized porous titanium layer is prepared through plasma spraying, and then nano-hydroxyapatite is doped to improve osteoinductivity; the graphene enhancement layer is modified, a graphene oxide film is electrochemically deposited, the graphene oxide film and the titanium substrate are covalently bonded through a silane coupling agent, and strontium ions are loaded to promote osteogenic differentiation; an antibacterial active layer and in-situ reduced graphene oxide form a three-dimensional network conductive structure, tantalum-doped carbon nitride quantum dots are loaded through ultrasonic dispersion and embedded between graphene layers to form an antibacterial phase, and then magnesium silicate nanowires are subjected to hydrothermal growth to form a bioactive phase. Through triple bionic design of porous titanium, ion release / photo-thermal response and PDA adhesion, the bone bonding strength, antibacterial property, wear resistance and corrosion resistance of a coating interface are improved.

The invention relates to the field of biomimetic materials, in particular to a biomimetic self-cleaning anti-fouling aquaculture net cage material, a preparation method and application of the biomimetic self-cleaning anti-fouling aquaculture net cage material. 0.5 to 2.0 parts by weight of a carboxylated graphene nanosheet; 2.0 to 5.0 parts by weight of nitrogen-doped titanium dioxide nanoparticles; 1.0 to 3.0 parts by weight of silica nanoparticles; 5.0 to 10.0 parts by weight of calcium ion cross-linked modified sodium alginate; 1.0 to 3.0 parts by weight of octadecyl trichlorosilane; 0.5 to 1.5 parts by weight of lauryl sodium sulfate; through the synergistic effect of a double bionic structure and enhanced photocatalysis, the effective inhibition on attachment of various organisms is realized, and the inhibition rate on attachment organisms such as algae, bacteria and barnacles reaches 75% or above.

The invention provides a sole soft tissue physiological environment simulation and multi-modal detection system, and belongs to the technical field of human body biomechanical detection. The method solves the problem that a traditional evaluation method is difficult to comprehensively analyze biomechanical characteristics and pathological mechanisms. The plantar soft tissue physiological environment simulation and multi-mode detection system comprises a sealed detection cabin, a bionic foot and a detection system arranged in the sealed detection cabin, the detection system comprises a humidity generation module used for humidity environment simulation, a heating module used for temperature environment simulation, a humidity sensing module used for temperature monitoring, a temperature sensing module used for temperature monitoring, an ultrasonic sensing module used for data acquisition and an infrared thermal imaging module. The system has the advantages that a detection system capable of reproducing the real physiological state of the sole is constructed by accurately simulating the physiological environment of the soft tissue of the sole through environment simulation, data acquisition and multi-modal fusion analysis, and multi-dimensional data support is provided for the design of a biomimetic material.

Provided is a biosynthesis-based preparation method for a structural material of the human body. A polypeptide of the present application contains the structure of a C-terminal region of (repeating unit)n or (repeating unit)n-; the repeating unit contains an amino acid sequence as shown in SEQ ID NO. 1. Recombinant type V humanized collagen prepared in the present application has high activity in promoting cell adhesion, and does not cause an immune response when applied to the human body; moreover, the preparation method is novel, allows for large-scale production of the recombinant type V humanized collagen, and is widely used in the preparation of structural materials of the human body. The application field includes preparation of high-end medical devices, such as biological dressings, human body biomimetic materials, plastic-beauty materials, organoid culture, cardiovascular stents, coatings, tissue injection filling, ophthalmic materials, gynecological biomaterials, nerve repair and regeneration, liver tissue and vessel repair and regeneration, and 3D printing of artificial organ biomaterials.

The invention provides super-stretched liquid metal-natural rubber composite hydrogel as well as a preparation method and driving-sensing synergistic bionic application thereof, liquid metal eutectic gallium indium is crushed into nano-particles, and then the nano-particles are combined with natural rubber latex to be compounded with poly (N-isopropylacrylamide), so that the super-stretched liquid metal-natural rubber composite hydrogel is prepared. The liquid metal-natural rubber composite intelligent hydrogel driving-sensing dual-function synergistic double-layer structure biomimetic material can be obtained. The material has the super-tensile property (the tensile rate is 1300%) and has the high deformation speed (the bending speed can reach 62 degrees / s) under photo-thermal driving. As the hydrogel contains liquid metal, the hydrogel has excellent conductivity (the conductivity can reach 5532 [mu] S / cm), and an electric signal can be monitored in real time in a photoresponse bending process, so that the hydrogel has an application prospect in the field of photothermal driving-self-sensing dual-function synergistic materials.

The invention relates to the technical field of biomimetic materials, in particular to a solvent-mediated rigidity-adjustable material, a preparation method and application. The rigidity-adjustable material comprises a base material, wherein the base material comprises a hydrophobic main chain and a spatial cross-linked network structure formed by hydrophilic side chains grafted to the hydrophobic main chain in a comb shape; the base material forms a nanoscale hard domain under the triggering of a polar or non-polar solvent, and forms a polar hardened body material or a non-polar hardened body material respectively; in the hardened body material, the size of the hard domain is in positive correlation with the surface energy of the solvent, the modulus amplification of the hardened body material relative to the matrix material is directly determined by the size of the hard domain, and the modulus amplification can reach 9.9 times; and after multiple swelling-desolventizing cycles, the modulus attenuation is less than 5%. The material provided by the invention breaks through the defects that the modulus switching range of the existing material is mostly limited to be less than 5 times, and the rigidity is improved along with the obvious reduction of the toughness, and has a wide application prospect in the fields of wearable electronics, soft robots, anti-impact protection and the like.

The invention relates to a preparation method of a biomimetic material for simulating oral masticatory mucosa and a product and application thereof, the preparation method comprises the following steps: cloning a coding gene of a protein containing a VPGXG repetitive unit into an expression vector to obtain a first expression vector; cloning the coding gene of the protein containing the VPGXG repetitive unit into the expression vector, and adding cysteine to each of the two ends of the protein to obtain a second expression vector; respectively transferring the first expression vector and the second expression vector into competent cells for expression, separation and purification of proteins to obtain a first expression vector protein and a second expression vector protein; and mixing the first expression vector protein, the second expression vector protein and the multi-arm PEG-MAL solution to obtain the multi-arm PEG-MAL. The hydrogel prepared by the invention accurately simulates the characteristics of oral chewing mucosa in mechanical properties, has no cytotoxicity, can replace real oral mucosa for experiments, and can be widely applied to the experimental fields of drug release, cell culture, gas component monitoring and the like.

The invention belongs to the field of skin medicine (collagen biomimetic material technology), and particularly relates to a high-activity triple-helix mini collagen for skin light injury repair, the high-activity triple-helix mini collagen successfully simulates the structure and function of natural collagen, has no cytotoxicity and good water solubility, and can be used for repairing skin light injury. The high-activity triple-helix mini collagen can promote adhesion, migration and proliferation of fibroblasts and has a remarkable repairing effect on skin damaged by ultraviolet rays, meanwhile, the preparation method of the high-activity triple-helix mini collagen is simple and convenient, conditions are mild, and the high-activity triple-helix mini collagen has wide application prospects in the fields of tissue regeneration, skin medicine and the like.

The invention provides a mechanical and pH dual-regulated butterfly potassium ion channel molecule as well as a preparation method and application thereof, and belongs to the technical field of biomimetic materials. According to the butterfly-shaped potassium ion channel molecule disclosed by the invention, third-generation and fourth-generation dendrimer polypropyleneimine (POPAM) are respectively taken as a core, and POPAM is connected with an ion binding site benzo-21-crown ether-7 through a urea bond. Intramolecular hydrogen bond constraint enables GnC7 to present a symmetrical butterfly-shaped topology structure, and the channel has unique motion characteristics, and finally, efficient potassium ion transmembrane transmission with highest potassium-sodium selectivity up to now is realized. The dynamic characteristic is used as the core attribute of GnC7, so that the channel can adjust the potassium ion transmission rate according to the membrane tension change caused by mechanical force. Meanwhile, benzylamine hexafluorophosphate Bh influenced by pH is used as a blocking agent of GnC7 through a host-guest specific compounding effect, and switching of pH-regulated potassium ion transmission can be realized.

The application discloses a kind of photo-curing mussel biomimetic acylhydrazone and its preparation method and application, the structural formula of the photo-curing mussel biomimetic acylhydrazone is as shown in formula (I).The photo-curing mussel biomimetic acylhydrazone of the application has catechol structure and carbon-carbon double bond, raw material is low in price, synthesis process does not need to modify catechol structure, preparation method is simple, can reduce the synthesis difficulty and production cost of mussel biomimetic material.The mussel biomimetic photo-curing adhesive composition prepared by using photo-curing mussel biomimetic acylhydrazone as raw material has good adhesive property, and can improve the problem of insufficient adhesion and failure of photo-curing adhesive, and prevent falling.

The application discloses a plant leaf biomimetic material with antifouling self-cleaning and spectrum simulation performance and a preparation method thereof. The plant leaf biomimetic material comprises, from bottom to top, a first liquid injection super-smooth porous elastomer layer, a hydrogel layer, a camouflage color fabric layer, a hydrogel layer and a second liquid injection super-smooth porous elastomer layer. The liquid injection super-smooth porous elastomer layer is a porous elastomer filled with silicone oil in voids. The first and second liquid injection super-smooth elastomer layers are the same or different. The hydrogel layer is one of a single-network hydrogel or a double-network hydrogel. The color of the camouflage color fabric layer is one of dark green, medium green, yellow green and light green. The plant leaf biomimetic material has excellent plant leaf spectrum simulation effect, can simulate the cell cavity tissue of plants, has antifouling and hydrophobic properties, can maintain excellent plant leaf spectrum simulation effect after rainwater washing, and can realize high-weatherability spectrum simulation.

The invention provides a self-early-warning-self-reinforcing spandex fiber and a preparation method thereof, and the method comprises the following steps: adding a compound M1, polyol, polyisocyanate and a catalyst into a solvent for reaction to obtain a polymer solution; precipitating the polymer solution in methanol, and drying the precipitate; and dissolving the dried sample in a solvent to prepare a spinning solution, and preparing the spinning solution into the spandex fiber. When the self-early-warning and self-reinforcing spandex fiber is subjected to external force, the internal bearing condition of the self-early-warning and self-reinforcing spandex fiber can be displayed in real time, the potential destructive external force of the self-early-warning and self-reinforcing spandex fiber can be subjected to self-early-warning, and on the other hand, a damaged part can be crosslinked to achieve a self-reinforcing effect. According to the method, the self-early-warning and self-reinforcing performance of the spandex fibers can be effectively guaranteed, and application of the spandex fibers in the fields of biomimetic materials, mechanical sensing, intelligent clothes and the like is facilitated.

The invention belongs to the field of application of inorganic biomimetic materials to tumor targeted drugs, and particularly discloses a photomagnetic in-situ self-assembled photothermal gas cascade bionic nanoreactor, a preparation method and application. The nanoreactor is composed of spherical carbonyl iron powder in the innermost layer, sea urchin mastoid Fe3O4 attached to the surface of the spherical carbonyl iron powder and a platelet membrane wrapping the outermost layer. The preparation method comprises the following steps: 1) preparation of carbonyl iron powder (CIP): converting sponge iron elementary substance into multi-carbonyl iron under the conditions of high temperature and high pressure, and introducing CO for annealing to obtain the carbonyl iron powder; (2) preparing CIP-Fe3O4: depositing ferroferric oxide on the surface of carbonyl iron powder by using the protection of NH3 on carbonyl in an in-situ coprecipitation manner; and 3) preparation of CIP-coated Fe3O4-coated PM: coating the surface of CIP-coated Fe3O4 with the extracted platelet membrane through ultrasonic and extrusion methods. The CIP (at) Fe3O4 (at) PM nano-reactor disclosed by the invention has the characteristics of optomagnetic in-situ self-assembly capability and photothermal gas cascade, and is used for enhancing the tumor diagnosis and treatment effect.

The invention discloses a method for preparing a three-dimensional bionic structure through pulse laser assisted direct laser melting deposition, and relates to the technical field of additive manufacturing. In the additive manufacturing process, a continuous laser head advances at the constant speed v2 in the advancing direction; the pulse laser head conducts periodic reciprocating scanning at the speed v1 within the size range scanned by the continuous laser spots in the direction perpendicular to the advancing direction, the scanning path and parameters are controlled through software, a hole or a high residual compressive stress area is formed within the preset range of the material subjected to single-layer machining, and after single-layer machining is completed, the hole or the high residual compressive stress area is obtained. And the holes or the high residual compressive stress areas are embedded into the additive manufacturing layers to form single layers with bionic structure characteristics, and the single layers are overlapped layer by layer to form the material with three-dimensional bionic structure characteristics. According to the method, the three-dimensional biomimetic material with the directional structure characteristic is prepared by adopting the pulse laser in cooperation with the DLD additive manufacturing technology, and compared with a traditional method, the method has the beneficial effects that the structure, performance and size are accurate and controllable, and the like.

The invention discloses a bionic three-dimensional magnetic control microstructure super-hydrophobic antifouling surface and a preparation method thereof, and belongs to the technical field of structural bionic materials. Inspired by a self-cleaning surface which is swung, swept and driven by a coral tentacle, in order to overcome the limitation of a single anti-fouling strategy and overcome the defects of the prior art in long-term anti-fouling effect, a conical array is designed by taking the coral tentacle as a prototype; the conical array is made of silicone rubber mixed with magnetic particles, and is driven by an external magnetic field to realize directional continuous swinging of the array structure; a rough super-hydrophobic structure is formed on the surface of the conical array through laser etching, the super-hydrophobic structure on the surface achieves a self-cleaning function, adhesion of fouling organisms is effectively reduced through an active driving / passive desorption synergistic effect, intelligent regulation and control of viscosity reduction and desorption are achieved, and the service life of the device is prolonged. The method has the advantages of environmental friendliness, low preparation cost, wide application range, long service life and the like.

The present application belongs to the field of bionic technology, and particularly relates to a kind of bionic material loaded with YD monomer and its preparation method and application.The present application utilizes YD monomer composed of tyrosine (Y) and aspartic acid (D) to synthesize a kind of bionic material through reversible addition-fragmentation chain transfer (RAFT) polymerization. The bionic material can produce spatially adjacent binding pockets through the covalent bond of tyrosine (Y) and aspartic acid (D), and can capture two kinds of PTM (phosphopeptide and O-glycopeptide) simultaneously through synergistic interaction. The results of the present application show that the bionic material of YD monomer optimizes charge balance, the neutral phenolic group of Y (pKa ~ 10) and the negatively charged carboxylate of D (pKa ~ 3.9) together reduce the electrostatic repulsion with phosphopeptide, while maintaining target affinity; self-assembled into nanostructured porous framework can expose multivalent binding sites, and significantly improve capacity and selectivity through synergistic effect.

The invention relates to a buffer material based on a bionic metamaterial, a multifunctional buffer device and a preparation method of the buffer material. The buffer material is formed by arranging a plurality of cylinder unit arrays; the column body units are symmetrical and are provided with a plurality of hollow areas; the cross section of each cylinder unit comprises at least three layers of geometric units, and the geometric units of all the layers are combined in a nesting mode; the geometric units comprise a circle and a circular ring. The prepared buffering material has excellent energy absorption performance, the multifunctional buffering device has buffering and sensing functions, real-time monitoring of exercise loads can be achieved, the exercise special performance is improved, and personalized prevention of exercise injuries is achieved.

The present invention belongs to the field of batteries, specifically disclosed are a solid-state electrolyte, a preparation method therefor and a use thereof. The solid-state electrolyte contains a biomimetic material, an electrolyte salt, and a plasticizer. The biomimetic material is loaded with the electrolyte salt and the plasticizer. The biomimetic material comprises a monocyclic aromatic compound and a triazine nitrogen-containing heterocyclic compound. The monocyclic aromatic compound and the triazine nitrogen-containing heterocyclic compound are connected through hydrogen bonds. The biomimetic material has nanochannels with a diameter of 0.3-1 nm. In the solid-state electrolyte of the present invention, the monocyclic aromatic compound and the triazine nitrogen-containing heterocyclic compound are assembled through hydrogen bonds to form a biomimetic material having nanofluid transport channels with a diameter of 0.3-1 nm, thereby enabling rapid ion conduction of metal cations under nanofluid control, such that a solid-state battery containing the solid-state electrolyte of the present invention has a room-temperature lithium-ion conductivity of up to 17 mS / cm, a transference number of up to 0.7-0.8, and a voltage window of up to 4.5 V.

The invention belongs to the field of bionic materials, and particularly relates to a bionic concentric layered brick-mud structure micro-nano composite material and a preparation method thereof. The preparation method provided by the invention comprises the following steps: a) mixing an inorganic micro-nano sheet with a solvent to obtain a dispersion liquid; mixing the dispersion liquid with a binder solution to obtain mixed slurry; b) preparing a film from the mixed slurry, and then performing densification treatment on the prepared film to obtain a densified composite film; c) curling and forming the densified composite film to obtain a concentric layered cylindrical winding body; and d) dipping the concentric layered cylindrical winding body in a resin precursor solution, and then carrying out curing treatment to obtain the bionic concentric layered brick-mud structure micro-nano composite material. The preparation method provided by the invention is simple in process and suitable for large-scale production, and the prepared composite material not only can realize axial compression resistance and radial bending / torsion resistance, but also has excellent fatigue resistance.

The invention discloses a six-dimensional force control sensing bionic foot system and a control method.The system comprises a bionic foot body, a parallel driving mechanism, an ankle joint platform, a multi-point six-dimensional force sensing device and an ankle joint controller, and the multi-point six-dimensional force sensing device is used for obtaining information of the bionic foot body and the ankle joint platform; the ankle joint controller is used for adjusting the parallel driving mechanism, and the parallel driving mechanism controls the bionic foot main body through the ankle joint platform; the ankle joint controller fuses information transmitted by each six-dimensional force sensor, and then controls the parallel driving mechanism to adjust the ankle joint platform and the bionic foot main body. According to the invention, the triangular arch structure in the shape of the foot arch is combined with the flexible biomimetic material, so that larger-area contact and attachment can be realized on the uneven ground; information of three six-dimensional force sensors is fused through a model, data such as a zero moment point is calculated, and more sufficient feedback information is provided for attitude control; feedback information is also introduced, closed-loop dynamic feedback is formed, and the stability is improved again.

The present invention provides a design method for impact-resistant bionic materials based on molecular dynamics, comprising the following steps: preliminarily determining the range of the number of plies of the Brigan film; determining the design criteria of the helical angle of the Brigan film to select a suitable Brigan structural material and potential function; constructing a target model of projectile impacting the Brigan film, energy minimization and relaxation target model until the model reaches an equilibrium state; setting the projectile as a rigid body under the NVE ensemble, giving the projectile impact velocity ballistic impact to the Brigan film; evaluating the impact resistance of the Brigan film according to the ballistic limit velocity and the penetration energy index, visually analyzing the trajectory file, and selecting a suitable helical angle parameter range; changing the number of plies of the Brigan film to obtain the final Brigan configuration. The present invention uses molecular dynamics to reveal the microscopic mechanism of dynamic impact of Brigan bionic materials, improves the design level of nano-scale impact protection materials, shortens the development cycle of new materials and reduces costs.

The invention relates to the field of anti-seismic design of building structures, and discloses a bionic design method for optimizing the anti-seismic performance of a building structure, which comprises the following steps: step 1, firstly, collecting a biological sample with anti-seismic capacity, and then researching the body structure of a biological sample and the performance of the biological sample in an earthquake; the method comprises the following steps: step 1, selecting an organism with excellent anti-seismic capacity as a bionic object, and step 2, establishing a corresponding mechanical model according to an analysis result of a biological structure through mathematical modeling and mechanical analysis, and converting key anti-seismic characteristics of the selected biological structure into quantitative design parameters. By researching organisms with shock resistance, the stability and reliability of a building structure in an earthquake are remarkably improved, earthquake damage and casualty risks are greatly reduced, meanwhile, intelligent biomimetic materials are integrated at key nodes, earthquake damage is repaired by using a microcapsule repairing agent and a microorganism mineralization mechanism, and the service life of the intelligent biomimetic materials is prolonged. And the integrity and the safety of the structure after the earthquake are ensured.

The application relates to a two-dimensional flower-shaped near-infrared responsive water-soluble photothermal conversion nanomaterial and a synthesis method and near-infrared application thereof. The two-dimensional copper sulfide nanosheet is prepared through a hydrothermal reaction, and gold nanoparticles are loaded on the edges of the two-dimensional nanosheet through gold-sulfur bonds, the content and molecular weight of the active agent on the surface of the nanosheet are controlled, the uniform loading of the gold nanoparticles is realized, and a composite material of a biomacromolecule and a biomimetic material modified inorganic nanomaterial is constructed. The nanomaterial prepared in the application has a unique two-dimensional flower-shaped morphology, has a wide spectrum absorption in the near-infrared region, and the maximum absorption peak extends to the NIR-IIa region, has the photothermal and photoacoustic performance in the near-infrared region, the material has effective brain tumor homing ability due to the T cell biomimetic membrane coating, the limitation of the nanomaterial in crossing the BBB is overcome, the tumor photothermal treatment effect is significantly enhanced, the biocompatibility is high and the material is non-toxic, no pollution is caused, the synthesis process is simple, the cost is low, and the material has a good treatment application prospect.