230 results about "Nanofiber composites" patented technology

The invention discloses a C5F10O mixed gas decomposition component adsorption material as well as a preparation method and application thereof. The adsorption material is a metal organic framework / nanofiber composite membrane which is prepared by uniformly dispersing a metal organic framework material on a nanofiber membrane obtained by an electrostatic spinning technology through a spraying doping method and is used for adsorbing decomposition components of C5F10O mixed gas. According to the adsorption material provided by the invention, through mutual cooperation of the metal organic framework material and the porous nanofiber membrane base material, a formed composite membrane has a larger specific surface area and more metal active sites, adsorption of gas molecules is promoted, permeation and diffusion of the gas molecules are also facilitated, and the adsorption efficiency is improved. Therefore, the gas sensitivity and the adsorption effect of the adsorption material are remarkably improved.

The invention discloses a preparation method of a cellulose acetate / thermoplastic polyurethane / polypyrrole composite conductive nanofiber aerogel composite pressure sensing material. The preparation method comprises the following steps: (1) preparing a cellulose acetate and thermoplastic polyurethane spinning solution; (2) preparing a cellulose acetate / thermoplastic polyurethane composite nanofiber membrane; (3) preparing cellulose acetate / thermoplastic polyurethane short nano dispersion liquid; (4) preparing a cellulose acetate / thermoplastic polyurethane / polypyrrole polymerization solution; and (5) preparing the cellulose acetate / thermoplastic polyurethane / polypyrrole composite conductive nanofiber aerogel. According to the preparation method, a high-temperature thermal annealing process is not needed, and the prepared nanofiber composite aerogel has high conductivity, ultralow volume density, high compression deformation performance and high pressure resistance sensing sensitivity.

The invention discloses a high-entropy alloy silicon carbide nanofiber composite material and a preparation method and application thereof, a high-entropy alloy is loaded on silicon carbide nanofibers, compared with a carbon fiber material carrier, SiC fibers can form a compact SiO2 protective layer in a high-temperature aerobic environment, further oxidation failure of the internal structure can be prevented, and the high-entropy alloy silicon carbide nanofiber composite material is prepared. And meanwhile, SiC also has relatively high high-temperature stability and weather resistance, so that the high-entropy alloy silicon carbide nanofiber composite material can stably work in an extreme high-temperature oxidation environment (such as a spacecraft thermal protection system and an engine tail gas pipeline) of over 1000 DEG C, and perfectly adapts to a high-temperature wave-absorbing scene.

The invention discloses a preparation method and application of three-dimensional intercalation multidirectional conductive MXene-based aerogel, and relates to the technical field of advanced electrochemical energy storage materials and devices. According to the MXene / conductive polymer and nanofiber composite aerogel developed by the invention, the two-dimensional conductive material, the pseudocapacitance polymer and the high-performance nanofiber are integrated in a three-in-one manner, so that collaborative optimization of conductivity, the number of active sites and structural stability is realized, and inherent defects of a single-component material are fundamentally avoided; and a universal solution is provided for solving the industrial problem of unbalanced performance of the electrode material.

The invention belongs to the related technical field of flexible electrodes, and discloses a preparation method, a product and application of a high-temperature-resistant flexible metallized ceramic nanofiber composite electrode. The method comprises the following steps: carrying out electrostatic spinning on electrostatic spinning sol doped with an organic polymer to obtain a precursor of a flexible ceramic nanofiber membrane; carrying out primary high-temperature calcination on the precursor to remove the doped organic polymer so as to obtain a flexible ceramic nanofiber membrane; growing and coating a metal conductive layer on the surface of the flexible ceramic nanofiber membrane to obtain an electrode precursor; and carrying out secondary high-temperature calcination on the electrode precursor to obtain the required composite electrode. The invention also discloses a product obtained by the preparation method and application. According to the invention, the problem that the flexible sensor is not resistant to high temperature is solved.

The invention belongs to the field of battery diaphragms, and particularly provides a preparation method of a solid electrolyte composite material, which comprises the following steps: (S1) mixing a polymer, a plasticizer and a lithium salt, adding into a second solvent, dissolving and stirring to obtain an electrostatic spinning precursor solution; (S2) depositing the electrostatic spinning precursor solution on the surface of a receiver through electrostatic spinning to obtain a fiber membrane, and separating the fiber membrane from the receiver; and (S3) soaking the fiber membrane in a dispersion liquid, and performing dispersion treatment to obtain the nanofiber composite material, specifically, a battery prepared from the solid electrolyte composite material provided by the invention has excellent electrochemical performance, can still maintain a high capacity retention ratio after multiple cycles, has excellent rate capability, and can be applied to the field of lithium ion batteries, such as lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries and lithium ion batteries. And the long-term stability and safety of the operation of the battery can be ensured.

The present invention relates to the technical field of air purification, and particularly provides a nanofiber composite air purification filter material and a preparation method therefor. The nanofiber composite air purification filter material comprises a composite structure consisting of four layers arranged from top to bottom, which are respectively a non-woven fabric, a nanofiber membrane layer, a modified melt-blown non-woven fabric and a spunbond non-woven fabric; the non-woven fabric is PET needle-punched non-woven fabric; in parts by weight, the raw materials for preparing the nanofiber membrane layer comprise: 10-20 parts of polylactic acid, 3-5 parts of a reinforcing agent, 2-4 parts of modified nanoparticles and 100-150 parts of a solvent; and the spunbond non-woven fabric is made of PET or PP. The nanofiber composite air purification filter material provided by the present invention has air-permeability, radiation resistance, and antibacterial properties, can be widely applied in the field of air purification filter materials, and has considerable commercial application value.

The invention discloses a high-temperature-resistant, heat-insulating and flame-retardant poly (p-phenylene terephthamide) nanofiber composite aerogel as well as a preparation method and application thereof. The composite aerogel is prepared by slowly releasing proton to induce gel through a two-step sol-gel method. Firstly, carboxyl on a PAA molecular chain is introduced to interact with deprotonated amido in an ANF molecular chain, so that a part of a hydrogen bond system is recovered, ANF pre-gel is achieved, then Ti2CCl2 is dispersed into the ANF pre-gel system, the gelation process is further completed through protonic acid, and the ANF / Ti2CCl2 / ANF composite material is obtained. The composite aerogel is obtained through an improved directional freeze-drying technology and a solvent replacement method. The prepared composite aerogel combines the high thermal stability of Ti2CCl2 and the excellent mechanical property of ANF, has excellent flame retardance, high temperature resistance and heat shielding effectiveness, has wide application prospects in the fields of electronic heat dissipation, building energy efficiency, solar energy utilization and the like, and can meet the ever-increasing requirements for efficient thermal regulation and thermal protection.

The invention relates to a covalent organic framework modified cellulose nanofiber composite diaphragm which is characterized in that cellulose nanofiber is used as a matrix, an amide type or amine type covalent organic framework layer is grown on the surface in situ, the loading capacity of a covalent organic framework is regulated and controlled, and a hierarchical pore structure with gradient pore diameter is constructed; the preparation method comprises the following steps: synthesizing a covalent organic framework precursor bonded with an imine bond on the surface of cellulose nanofiber in situ by a one-pot method under an acidic mixed solution and a heating condition, and regulating and synchronously reducing to convert into an amine type covalent organic framework; or after the imine bond bonded covalent organic framework is synthesized in two stages, the imine bond bonded covalent organic framework is selectively converted into an amide type covalent organic framework through oxidation modification; the obtained cellulose nanofiber compound coated with the covalent organic framework is subjected to the processes of film forming, solvent replacement, supercritical drying and the like, and the composite diaphragm is obtained; the diaphragm has excellent electrolyte wettability, high liquid absorption rate, good ionic conductivity and thermal stability, and can promote uniform transmission of lithium ions and inhibit growth of lithium dendrites.

The invention discloses a high polymer / nanofiber composite material with high mechanical property and high weather resistance as well as a preparation method and application thereof, and belongs to the technical field of polymer / nanofiber composite materials. According to the invention, polyether polyol participates in a prepolymerization reaction and is used for preparing a high-molecular polymer from modified nanofibers, and in the reaction process of a curing agent and isocyanate, the modified nanofibers and organic silicon are used as reinforcing phases to be added into the high-molecular polymer; the mechanical property, the weather resistance, the hydrophobic ice resistance, the chemical corrosion resistance and the wear resistance of the high-molecular polymer material are improved. The high polymer / nanofiber composite material with high mechanical property and high weather resistance provided by the invention is suitable for rain erosion protection of wind power blades. The preparation process is simple and efficient, the tensile strength, the elongation at break and the impact strength of the prepared high polymer / nanofiber composite material are remarkably enhanced, and the high polymer / nanofiber composite material is environment-friendly.

The invention discloses a preparation method and application of a manganese fluoride / carbon nanofiber composite material. The method comprises the following steps: dissolving metal salt and a fluorine-containing high polymer material in an organic solvent to obtain a precursor solution; performing electrostatic spinning on the precursor solution to obtain nanofibers, and drying to remove the solvent; and calcining the nanofiber in an inert atmosphere, and fluorinating and carbonizing at the same time. The method disclosed by the invention is simple in process, the manganese fluoride / carbon nanofiber composite materials with different particle sizes can be prepared by adjusting the concentration of a manganese source and the pyrolysis temperature, and the prepared material has excellent electrochemical performance and is a promising negative electrode material for the potassium ion battery.

The invention relates to the technical field of biomedicine, and provides an endometrial repair stent and a preparation method thereof.The endometrial repair stent is prepared by taking a flaky nanofiber composite membrane as a substrate, combining the flaky nanofiber composite membrane with modified hyaluronic acid, then conducting dynamic crosslinking with carboxymethyl chitosan and then conducting compounding with poly N-isopropylacrylamide; the mass ratio of the modified hyaluronic acid to the carboxymethyl chitosan to the poly (N-isopropylacrylamide) is (1-9): (1-9): (1-90); the thickness of the nanofiber composite membrane is 0.1-0.4 mm, and the nanofiber composite membrane can be applied to treatment of intrauterine adhesion. According to the endometrial repair stent, the nanofiber composite membrane and the temperature-sensitive hydrogel are combined, a uterine cavity is fully paved by utilizing the fluidity of the hydrogel, and the three-dimensional structure of the nanofiber can be used for orderly inducing a wound surface, so that the adhesion and proliferation of cells are facilitated, scar formation is reduced, the repair effect is ensured, and regeneration is promoted. The two parts are combined, so that the plasticity of the whole structure is enhanced, the supporting performance is improved, the indwelling time in the uterine cavity is long, and the double effects of repairing and isolating are fully achieved.

This invention provides an in-situ polymerized yarn and its preparation method, relating to the field of yarn textile technology. The preparation method of this in-situ polymerized yarn includes the following steps: S1. Mixing a polymer, solvent colorant, and complexing agent in a specific ratio to obtain a spinning solution; S2. Simultaneously performing electrospinning, carding, and embedding to obtain a colored nanofiber / cotton composite sliver; S3. Drawing and spinning the sliver to produce yarn. By using colored nanofibers composited with a cotton web, the finishing process is eliminated to reduce contamination. The selection of polydimethyldiallyl ammonium chloride as a complexing agent in the spinning solution increases the volume occupied by the cross-linked structure formed by the complexing agent and dye, enhancing the cohesion with the polymer and improving its color fastness.

The invention discloses a rare-earth-based soil remediation catalyst as well as a preparation method and application thereof. The catalyst takes a composite oxide of micron-sized aluminum oxide and titanium dioxide as a carrier, a nano-fiber composite oxide of cerium oxide and copper oxide as an active component and a nano-particle composite oxide of iron oxide and manganese dioxide as a cocatalyst; on the basis of the mass of the carrier, the mass percentage of the active component is 5-10%, and the mass percentage of the cocatalyst is 3-6%. The catalyst synthesized through the method has the advantages of being good in soil compatibility, high in catalytic efficiency and the like, and the target of low-energy-consumption remediation of organic pollutant soil can be achieved.

The present invention belongs to the field of preparation of nanofiber composite fabrics. The present invention provides a nanofiber high moisture permeability waterproof fabric with multi-level interconnected channels and a preparation method thereof. The fabric body includes an outer layer, an intermediate layer and an inner layer. The outer layer is a pure polyester waterproof fabric that has been waterproofed, the intermediate layer is a nanofiber membrane with multi-level interconnected channels, and the inner layer is a pure polyester fabric; the inner side of the outer layer of pure polyester waterproof fabric is bonded to the hydrophobic polyvinyl alcohol nanofiber membrane of the intermediate layer of nanofiber membrane with multi-level interconnected channels through hot melt adhesive compounding, and the inner layer of pure polyester fabric is bonded to the hydrophilic polyurethane nanofiber membrane of the intermediate layer of nanofiber membrane with multi-level interconnected channels through hot melt adhesive compounding. The nanofiber membrane with multi-level interconnected pores in the middle layer is composed of multiple nanofiber membrane layers stacked in sequence. Each nanofiber membrane layer has two layers of nanofiber membranes with different fiber diameters, one layer is a hydrophilic polyurethane nanofiber membrane, and the other layer is a hydrophobic polyvinyl alcohol nanofiber membrane. The nanofibers of the two membranes between and within the multi-level nanofiber membrane layers are cross-connected to form a three-dimensional structure with multi-level interconnected pores. The pore size gradually decreases from the hydrophilic polyurethane nanofiber membrane to the hydrophobic polyvinyl alcohol nanofiber membrane. The moisture permeability is higher than 15000g / (m 2 24h), the hydrostatic pressure is higher than 60kPa.

The invention discloses a poly (p-phenylene benzobisoxazole) nanofiber composite hydrogel photo-thermal evaporator and a preparation method and application thereof.The photo-thermal evaporator is composed of a photo-thermal conversion assembly and a heat insulation supporting assembly, and the photo-thermal conversion assembly is made of PBO nanofiber composite hydrogel; the bottom of the photo-thermal conversion assembly is embedded in the heat insulation supporting assembly. The interface water evaporation-oriented PBO nanofiber composite hydrogel is prepared by a simple sol-gel method, and the preparation process is simple. The PBO nanofibers and the polyvinyl alcohol are tightly combined to form an ultra-strong structure evaporator, the wettability of the material is improved due to the addition of the PVA, and the abundant three-dimensional network and porous structure provide guarantee for water transmission. The photo-thermal evaporator can serve as a main assembly of a solar interface water evaporation device, can obtain energy from the environment, has excellent interface water evaporation performance and meanwhile has good mechanical performance and tolerance.

The invention provides a zinc sulfide-porous carbon nanofiber composite membrane, a preparation method thereof, an electrode plate and a lithium ion battery, and relates to the technical field of nanostructure materials and batteries. According to the preparation method of the zinc sulfide-porous carbon nanofiber composite membrane, electrostatic spinning and calcination vulcanization processes are combined, and the zinc sulfide-porous carbon nanofiber composite membrane with a special morphology is prepared. The fiber composite membrane has a unique structure that zinc sulfide is uniformly distributed in the lotus-root-like porous carbon nanofibers, and the composite structure provides a good electron transport network and improves the conductivity of the material; due to the coating and confinement effects of the porous carbon nanofibers on the zinc sulfide, the volume expansion effect of the zinc sulfide in the circulation process can be effectively inhibited, the defects of poor conductivity, large volume expansion and the like of the zinc sulfide are overcome, and the circulation stability of the composite membrane is improved. As the fiber composite membrane has mechanical flexibility and self-supporting property, the fiber composite membrane can be directly used as an electrode plate, and the preparation process of the electrode plate is greatly simplified.

The invention belongs to the technical field of carbon nanofiber material manufacturing, and particularly relates to a preparation method of acid-modified multilayer graphene doped polyacrylonitrile-based composite active carbon nanofibers. The method comprises the following steps: chemically compounding modified multilayer graphene and polyacrylonitrile; preparing a nanofiber composite film by adopting an electrostatic spinning technology; then carrying out pre-oxidation and carbonization treatment on the carbon nanofiber composite film; and finally, carrying out acid leaching treatment on the carbon nanofibers to obtain the acid-modified multilayer graphene doped polyacrylonitrile-based composite active carbon nanofibers. A modification method is adopted, the modification effect is good, the surface area of the fiber is remarkably increased, more polar adsorption sites are provided, an important role is played in adsorption of isopropanol, meanwhile, the binding force between the materials is higher, and the applicability of the composite activated carbon nanofiber in the market is improved.

The invention discloses a preparation method of a functionalized SiO2 / aluminum silicate nanofiber composite membrane, which comprises the following steps: respectively modifying aluminum silicate nanofibers and SiO2 nanoparticles by using an amino silane coupling agent to respectively obtain aminated aluminum silicate nanofibers and aminated SiO2 nanoparticles; grafting succinyl chloride on the surfaces of the aluminum silicate nanofibers and the SiO2 nanoparticles to obtain acyl chloride aluminum silicate nanofibers and acyl chloride SiO2 nanoparticles; the preparation method comprises the following steps: modifying ethylenediamine tetraacetic acid dianhydride by using 2-amino-1, 3-propylene glycol to obtain an intermediate, carrying out a cross-linking polymerization reaction between acyl chloride aluminum silicate nano-fibers and acyl chloride SiO2 nano-particles by using the intermediate as a cross-linking agent and acyl chloride as a polymerization site, and carrying out suction filtration to form a membrane, so as to obtain the film. The gram weight of the functionalized SiO2 / aluminum silicate nanofiber composite membrane is not greater than 15g / m < 2 >. According to the invention, high-efficiency adsorption of heavy metals is realized, and meanwhile, the problem that a nano-powder material is difficult to recycle is solved.

The invention belongs to the technical field of flexible electronics, and relates to a flexible piezoresistive sensor based on an MXene multilevel heterostructure and a preparation method of the flexible piezoresistive sensor. The method comprises the steps that MXene nanosheets are attached to the surface of a thermoplastic polyurethane nanofiber substrate through electrostatic self-adsorption, a nanofiber composite layer is obtained, UIO-66-NH2 is dispersed in the thermoplastic polyurethane nanofiber substrate, and the surface of the thermoplastic polyurethane nanofiber substrate is modified with a first chitosan modification layer; the MXene nanosheets are embedded into the three-dimensional network of the polyurethane foam skeleton through dipping and extruding operation, a porous foam composite layer is obtained, and the surface of the polyurethane foam skeleton is modified with a second chitosan modification layer; and combining the nanofiber composite layer and the porous foam composite layer through a conductive adhesive containing silver paste, and carrying out packaging treatment to form the MXene multistage heterostructure with tightly combined interfaces. Based on the method, through the synergistic effect of the multistage heterostructures, high sensitivity, wide pressure detection range and high stability are realized at the same time.

The invention relates to the technical field of all-vanadium redox flow battery electrodes, and discloses a spinel nanofiber composite graphite felt electrode and a preparation method thereof, and the preparation method comprises the following steps: graphite felt pretreatment; preparing a spinel precursor solution; preparing spinel nanofibers; performing surface reconstruction treatment; preparing a composite graphite felt electrode; by regulating A-site and B-site metals of spinel, the conductivity of the composite graphite felt electrode is improved, activation polarization and ohmic polarization are reduced, energy loss generated by side reaction in battery operation is reduced, and through surface reconstruction, the spinel structure is stabilized, meanwhile, the surface roughness of nanofibers is increased, the active sites of the electrode are increased, and the conductivity of the composite graphite felt electrode is improved. And the efficiency of the battery is improved.

The application belongs to the field of medical biological materials, and relates to a preparation method of a hierarchical nanofiber composite film for nerve repair and application thereof. The method comprises the following steps: preparing multilayer nanofibers with different internal stresses through continuous multiple electrostatic spinning units, stacking the multilayer nanofibers with different internal stresses to form a composite nanofiber film with an internal stress gradient; chemically crosslinking the composite nanofiber film; performing adhesion molecule adhesion treatment on the upper surface of the composite nanofiber film; and preparing the hierarchical nanofiber composite film with an internal stress gradient and capable of self-deforming under the action of liquid to wrap nerves. The film provided by the application has excellent flexibility, biocompatibility and degradation performance, can efficiently and quickly adhere to the surface of damaged nerves, provides a good support microenvironment for nerve cell growth, promotes nerve regeneration and repair, and has a wide application prospect in the field of peripheral nerve injury repair.

The invention discloses a stealth coating material for aviation aircrafts. According to the invention, a three-layer composite structure design is adopted; the intelligent sensing layer is composed of graphene quantum dots and a piezoelectric nanofiber composite network, so that real-time sensing of electromagnetic wave signals is realized; the tunable metamaterial layer comprises a liquid crystal elastomer matrix and nickel-titanium alloy nanowires dispersed in the liquid crystal elastomer matrix, and electromagnetic parameters of the material are dynamically adjusted by applying an electric field or a temperature field; vanadium dioxide nanoparticles, a photonic crystal structure and carbon nanotube aerogel are integrated in the multispectral stealth layer, and radar, infrared and visible light multispectral synergistic stealth is achieved. The coating is further integrated with a microencapsulation repairing agent and an intelligent control system, and has the self-repairing and self-adaptive adjusting functions. Compared with the prior art, 0.1-40 GHz ultra-wide frequency band radar wave absorption is achieved, the radar cross section is reduced by 25-30 dB, the infrared radiation characteristic is reduced by 80% or above, the surface density is only 1.2-1.5 kg / m, the weight is reduced by 65% compared with a traditional coating, and a key material technical support is provided for a new generation of stealth aircrafts.

The application discloses a kind of MXene modified polyimide nanofiber composite membranes and its preparation method and application, the method is prepared by acid etching method MXene nanosheet and polyamide acid molecular chain form strong hydrogen bond and coordination effect, significantly enhance interface binding force.MXene effectively transmits load, inhibits crack propagation, substantially improves the tensile strength and toughness of composite membrane, while extending the diffusion path of particulate matter, combined with the electrostatic adsorption effect produced by MXene itself conductivity, significantly improve the interception efficiency of PM0.3~PM2.5 fine particulate matter.The thermal imidization process ensures that PI matrix is completely converted into high-temperature-resistant structure, giving the material the ability to operate stably at high temperature for a long time.The composite membrane realizes four breakthroughs of high strength, high efficiency, low resistance and high dust capacity, providing a new solution for high-performance air filtration under harsh working conditions.

The application discloses a kind of superhigh temperature self-adaptive insulated cable of composite and preparation method thereof, which uses carbon nanotube fiber bundle as conductor, multiple layer aerogel-ceramic nanofiber composite felt as insulator, stress buffer layer formed by negative thermal expansion coefficient material is arranged between layers, and the outer sheath is chemical vapor infiltration SiC carbon fiber braided sleeve.The cable of the application has the advantages of ultra-light, high thermal stability, self-adaptive sealing and strong thermal shock resistance, and is suitable for extreme high temperature environment above 800 DEG C;The preparation method includes supercritical drying, pre-stretching winding and other key processes, to realize the high performance and reliability of the cable.

The present invention relates to the field of battery material technology and discloses a preparation method and application of a cobalt phosphide-modified porous carbon nanofiber composite lithium negative electrode and carrier. The preparation method comprises dissolving cobalt nitrate hexahydrate and polyacrylonitrile in an N,N-dimethylformamide solution, mixing and spinning to obtain a cobalt-containing precursor film, wherein the mass ratio of cobalt nitrate hexahydrate to polyacrylonitrile is 1:1.5-3.2; then soaking the film in a methanol solution for 6-24 hours, and then soaking the film in a methanol solution containing a phosphorus source for 1-2 hours, wherein the volume ratio of the phosphorus source to the methanol solution is 1:40-60; and then pre-oxidizing and pyrolyzing the film for 1-2 hours to obtain a porous nanofiber carrier for a composite lithium metal negative electrode. The nanofiber carrier has a porous structure, which facilitates rapid electrolyte transport and uniform lithium ion flux on the negative electrode surface. The negative electrode has good coulombic efficiency and a high cycle number.

A composite nanofiber aerogel (CNA) is formed from aramid nanofibers (ANFs) combined with polyvinyl alcohol (PVA). These nanoscale constituents of the aerogel form 3D networks with high nodal connectivity and strongly welded connectivity joints between fibrils so that the structure has high stiffness and strength compared to other polymeric aerogels and successive breakage of crosslinks at the connectivity nodes affords energy dissipation while maintaining the overall structural integrity. A specific class of CNA with a specific solid content may be used to form a thin firm with a composite nanofiber framework (CNFF) that is useful in the manufacture of kirigami wearable electronics.

The invention discloses a fibroin nanofiber-bismuth nanoparticle composite membrane and a preparation method thereof. The composite membrane is formed by compounding bismuth nanoparticles and fibroin nanofibers; the preparation method comprises the following steps: dispersing fibroin nanofibers in deionized water, heating and stirring until the fibroin nanofibers are dissolved, then adding bismuth nitrate powder, continuously stirring uniformly, and then adding a reducing agent for treatment until no bubble overflows, so that bismuth elementary substances grow on the fibroin nanofibers to obtain a bismuth-based fibroin nanofiber solution; and drying the bismuth-based fibroin nanofiber solution to obtain the bismuth-based fibroin nanofiber composite membrane. The obtained membrane product has excellent hydrophilicity, biodegradability, anti-inflammatory performance and antibacterial performance, is wide in application, can simulate an extracellular matrix structure, is used as an infectious skin wound dressing, can be combined with ion slow release / photo-thermal / photodynamic therapy to promote wound repair, and is safe and effective.

The invention relates to the technical field of non-woven fabric coloring, in particular to a non-woven fabric coloring method which comprises the following steps: step 1, pre-treating non-woven fabric to enhance binding force; 2, coloring by combining an electrospinning method with a concave-convex structure; step 3, spraying step by step; 4, directional texture design and concave-convex mold auxiliary forming are carried out; and 5, environment-friendly low-temperature curing and follow-up treatment are conducted. The non-woven fabric is pretreated through plasma surface activation and ultrasonic alternate cleaning to enhance the binding force, and through nanofiber composite spraying, a mixed solution of a high-molecular compound and a coloring agent is sprayed through an electrospinning method, and a fiber layer with a concave-convex shape is formed on the surface of a collecting device; finally, a low-temperature curing technology is adopted, heating at the temperature of 40-60 DEG C or air drying at the room temperature is adopted, energy consumption is reduced, non-chemical structural colors are used for replacing, traditional acidic and disperse dyes are completely abandoned, colors are generated through physical arrangement of colloidal microspheres, waste water pollution is avoided, and therefore the method is good in process effect and high in environmental friendliness.

The invention provides a multi-modified high-nickel ternary positive electrode material, a preparation method thereof and a solid-state battery. The multi-modified high-nickel ternary positive electrode material comprises a high-nickel ternary core, a fast ion conductor coating layer and a polymer ceramic nanofiber composite coating layer, wherein the fast ion conductor coating layer and the polymer ceramic nanofiber composite coating layer are sequentially arranged on the surface of the high-nickel ternary core. According to the multi-modified high-nickel ternary positive electrode material disclosed by the invention, a dual cooperative defense system of the fast ion conductor layer and the polymer ceramic composite layer is constructed, so that the interface problems of surface side reaction, transition metal dissolution and the like are effectively solved, and a bulk phase structure is indirectly stabilized through external constraint and reduction of surface induction factors; therefore, the comprehensive improvement of the capacity, the rate capability and the cycle performance of the high-nickel material under the conditions of high voltage and long cycle is realized.