1683 results about "Electrospinning" patented technology

The invention provides an activated carbon fiber capable of efficiently removing formaldehyde and a preparation method thereof, the activated carbon fiber is of a composite material fiber structure of porous TiO2 derived from activated carbon and a metal organic framework (MOF), and the preparation method of the composite material comprises pretreatment of activated carbon, preparation of a Ti-MOF precursor and preparation of TiO2 / activated carbon fiber. According to the invention, the MOF-derived porous TiO2 / activated carbon composite fiber structure is constructed, physical adsorption and photocatalytic degradation functions are cooperated, and the limitation of single adsorption capacity is broken through; the interface bonding problem of the MOF derivative and the activated carbon is solved, and high-dispersion loading and stable and firm compounding of the active components are realized; a process path capable of realizing large-scale preparation is provided, and continuous production of the composite fiber is realized through an electrostatic spinning technology.

The invention discloses a glue solution for a copper-clad plate and a preparation method of the glue solution, and relates to the technical field of copper-clad plates. According to the prepared glue solution for the copper-clad plate, the composite epoxy resin, the curing agent, the accelerant, the solvent, the flexibilizer and the inorganic filler, the composite epoxy resin comprises bisphenol A epoxy resin, epoxy phenyl polysiloxane, itaconic acid polyaryletherketone and hydroxyl-terminated fluorine-containing vinyl polysiloxane, so that the interface bonding force with the copper plate is enhanced; the dielectric constant and the dielectric loss are effectively reduced, the peel strength and the toughness of the material are also remarkably improved, and the toughening agent is modified polyether sulfone microspheres; the modified polyethersulfone microspheres are prepared by coating polyethersulfone microspheres with hexamethylenediamine tetrapropionamide diamine, the hexamethylenediamine tetrapropionamide diamine is prepared by carrying out acylation condensation reaction on hexamethylenediamine tetramethyl propionate and ethylenediamine, and the polyethersulfone microspheres are prepared by carrying out electrostatic spinning on a spinning solution of polyethersulfone and vinylpyridine, so that the peel strength of the glue solution is remarkably improved.

The invention relates to a double-layer dressing for promoting wound healing and inhibiting scars and a preparation method and application thereof.The double-layer dressing comprises a hydrogel layer and a piezoelectric film layer compounded on the hydrogel layer, and the piezoelectric film layer is prepared by mixing an organic piezoelectric material, a ferroelectric material and an organic solvent and then conducting an electrostatic spinning technology; the hydrogel layer is formed by curing a methacrylic anhydride acellular extracellular matrix, methacrylic anhydride catechol chitosan and conductive nanoparticles under the action of a curing agent. The lower skin contact layer of the double-layer dressing is the hydrogel layer, so that the directional growth of fibroblasts is favorably induced; the upper dressing is a piezoelectric material composite ferroelectric material, is beneficial to piezoelectric stimulation re-induction function recovery after final skin repair and guidance of directional growth of wound cells, and has good skin wound induction repair and scar inhibition effects.

The invention provides a polyimide multilayer composite membrane material as well as a preparation method and application thereof, and belongs to the technical field of gas separation. According to the method, through collaborative design of a functional support layer, a gradient MOF layer and an ultrathin selection layer structure, the problems of support layer pore seepage, MOF agglomeration, weak interface bonding and the like in an existing composite membrane material are solved. The preparation method comprises the following steps: firstly, carrying out electrostatic spinning on a polyamide acid glue solution, and synchronously introducing dopamine by adopting a chemical imidization method to prepare a functionalized polyimide fiber membrane containing hydroxyl and amino on the surface, so that the mechanical property of a supporting layer and the MOF anchoring capability are remarkably improved; growing MOF layers with different particle sizes on the surface of the fiber membrane by regulating and controlling the concentration gradient of ligand / metal salt and the reaction time, and passivating through a silane coupling agent after each step of growth so as to avoid heterogeneous nucleation and construct a gradient structure; after the MOF gradient layer is subjected to Ar plasma pretreatment to introduce hydroxyl, the ultrathin polyamide selection layer is formed by utilizing interfacial polymerization of fluorine-containing acyl chloride and a macrocyclic amine monomer, and the ultrathin polyamide selection layer is suitable for gas separation work.

The invention relates to the technical field of biomedical materials, and discloses an electret electrostatic therapy membrane and a preparation process thereof.The electret electrostatic therapy membrane is prepared from, by mass, 15%-20% of fluorinated polyether ester, 10%-20% of a composite nano-fiber material, 10%-20% of a composite nano-fiber material, 10%-20% of a composite nano-fiber material and the balance water. 1%-2% of carboxymethyl chitosan; 2-5% of nano cerium oxide particles with the particle size of 50-100 nm; 0.5-1.0% of graphene quantum dots, the particle size of which is 5-10 nm; 1%-2% of sodium hyaluronate; the components are prepared into a film through an electrostatic spinning method, electret performance is given to the film through a charge injection process, finally, the film body is attached to a flexible silica gel adhesion layer, and the flexible silica gel adhesion layer is externally coated with a peelable protective film so that the structural integrity can be kept before the flexible silica gel adhesion layer is used. The composite membrane body disclosed by the invention shows excellent adhesion, charge activation capability and thermal response performance in applications of electrostatic therapy, dielectric assisted stimulation and the like, and has good multi-scene adaptability and clinical application potential.

The invention discloses an injectable material for promoting bone regeneration through piezoelectric and conductive integrated nanofiber hydrogel with ultrasonic response and a preparation method of the injectable material. The injectable material is composed of piezoelectric and conductive nanofibers and hydrogel. Wherein the piezoelectric conductive nanofiber is prepared from an inorganic piezoelectric material and a piezoelectric polymer through electrostatic spinning, or is prepared from an inorganic / organic composite piezoelectric material and a biological material with conductive performance through electrostatic spinning.

The invention discloses a novel textile material with eiderdown wrapped by rainbow yarn nanofibers and a preparation method. The novel textile material comprises skeleton fibers located at the axis, an eiderdown component with a heat preservation effect and a rainbow yarn nanofiber reinforcing layer wrapping the outer surface of the eiderdown component. The wrapping reinforcing layer is of a three-dimensional network structure formed by continuous or quasi-continuous nanofibers in a winding, interweaving and lap joint mode, so that stable compounding and structural shaping of down feather components and skeleton fibers are achieved under the condition that the down feather components and the skeleton fibers do not depend on adhesive fixation. The preparation method comprises the following steps: cleaning, drying and opening down for pretreatment; performing melt differential electrostatic spinning on the polymer melt under a high-voltage electrostatic field to form rainbow yarn nanofibers; the down flocs are introduced into the coating area through the framework fibers, so that the rainbow yarn nanofibers are deposited and wound to form a coating reinforcing layer; after being gathered and shaped and twisted into yarns, the yarns can be continuously dragged and wound. The novel textile material has spinnability, structural stability and long-acting thermal insulation performance, and is suitable for spinning, weaving and knitting processing.

The invention belongs to the technical field of spinning, and particularly relates to atmosphere-controllable needleless electrostatic spinning equipment and a method for preparing micro-nano fibers. The equipment comprises a needleless electrode wire, a liquid brushing tank, a direct-current high-voltage power supply, a winding roller, a metal plate, an air inlet, a sliding rail, an air outlet and a closed outer cover. The needle-free electrode wire is connected with the liquid brushing groove in series and connected with the positive electrode of the direct-current high-voltage power source, the metal plate is arranged over the needle-free electrode wire and connected with the negative electrode of the direct-current high-voltage power source or grounded, and the air inlet can reciprocate on the sliding rail. The atmosphere-controllable needleless electrostatic spinning equipment is used for stabilizing jet flow, the fiber forming quality is improved, generated beads are reduced, it is ensured that fibers are uniform and fine, and the mechanical property and stability of the fibers are remarkably improved; one-step preparation of porous fibers and fibers needing secondary reaction modification is achieved, and the consistency of the fibers in the fiber membrane is improved.

The application relates to a continuous macro-preparation device and method of a soft and elastic ceramic superfine fiber material, which sequentially comprises a feeding and liquid preparation system, a multi-jet uniform electrostatic spinning system, a low-temperature calcination system and a winding system. Raw materials are mixed, low-temperature dispersed and vacuum concentrated to obtain a sol; the sol and a polymer flow into a polymer mixing device to be mixed and bubble removed; the mixed sol flows into an inorganic component content control device to be pumped by negative pressure to obtain a spinning solution; the spinning solution flows into a multi-jet electrostatic spinning module to adjust and control the temperature, humidity and multi-directional differential speed during spinning to obtain a fiber membrane material or a fiber flake material; the fiber material is sequentially transmitted to a drying area, a microwave pretreatment area, a polymer removal area, an oxygen-poor atmosphere heat treatment area and a cooling area to be calcined in multiple temperature zones to obtain the soft and elastic ceramic superfine fiber material; and winding and packaging are realized to realize the continuous macro-manufacture of the soft and elastic ceramic superfine fiber material.

The invention relates to the field of oral cavities, and particularly discloses a lasting antibacterial type composite tooth socket for medicine carrying and a preparation method thereof.The lasting antibacterial type composite tooth socket comprises an adsorption layer and an antibacterial membrane layer, the adsorption layer is used for adsorbing oral cavity treatment liquid medicine, and the antibacterial membrane layer comprises a nano-silver antibacterial layer and a chitosan antibacterial layer; the preparation method comprises the following steps: mixing a tea polyphenol-polylactic acid composite solution, a nano-silver-carboxylation modified cellulose compound and a polyvinyl alcohol solution, and carrying out electrostatic spinning to prepare a nano-silver antibacterial fiber membrane, so as to form the nano-silver antibacterial layer; mixing chitosan with hot water, adding cinnamyl aldehyde, glycerol and boric acid, stirring to obtain a mixed solution, coating one side of the nano-silver antibacterial layer with the mixed solution, and curing to form a chitosan antibacterial layer; the adsorption layer is attached to the side, away from the chitosan antibacterial layer, of the nano-silver antibacterial layer, and then the lasting antibacterial type composite tooth socket for carrying the medicine is prepared through hot-pressing compounding. The drug-loaded composite tooth socket has the characteristic of further improving the antibacterial property and the antibacterial durability of the drug-loaded composite tooth socket.

The invention belongs to the technical field of food preservation, and particularly discloses an aerogel fiber membrane with humidity response and capable of being used for food preservation and a preparation method of the aerogel fiber membrane. The preparation method comprises the following steps: mixing a shell film-forming substance with a first solvent to obtain a shell spinning solution; mixing a core layer gel substance, a biological preservative, a cross-linking agent and a second solvent to obtain a core layer gel spinning solution; and then carrying out coaxial electrostatic spinning on the obtained shell layer spinning solution and core layer gel spinning solution at 40-60% RH to obtain the aerogel fiber membrane which has humidity response and can be used for food preservation. The core layer with the porous aerogel structure is prepared in one step, preparation is simple, industrialization is easy to achieve, and good application prospects are achieved; the aerogel fiber membrane not only can solve the problem of juice seepage in the storage process of fresh food, but also can perform humidity response to the environment and intelligently release an antibacterial agent in a controlled mode, growth and reproduction of dominant putrefying bacteria in the storage process of the fresh food are inhibited, and the preservation period is prolonged.

The invention belongs to the field of composite materials, and particularly relates to a nanofiber radiation refrigeration heat insulation film with a bionic multilayer structure. The device sequentially comprises a bionic anti-reflection layer, a solar spectrum reflection layer, a nanofiber porous heat insulation layer and an atmospheric window radiation layer from outside to inside, the bionic anti-reflection layer is a sub-wavelength nano bulge array simulating a moth eye structure and is formed on the outer surface of the solar spectrum reflecting layer; the solar spectrum reflecting layer is a polymer film doped with high-reflectivity nanoparticles; the nanofiber porous heat insulation layer is a porous membrane formed by interweaving polymer nanofibers prepared by an electrostatic spinning technology; the atmospheric window radiation layer is a functional layer formed by coating or blending high-emissivity inorganic nanoparticles on the inner surface of the nanofiber porous heat insulation layer; the film integrates bionic antireflection, high sunlight reflection, efficient heat radiation and physical heat insulation, and efficient, stable and flexible daytime radiation refrigeration is achieved.

The invention provides an impurity deep removal and purification device in ES fiber solvent recovery. Relates to the technical field of electrostatic spinning process and solvent recovery, and comprises a pre-separation module used for removing fiber residues and solid particles larger than 5 microns in solvent-enriched gas; the multi-stage deep condensation module comprises two stages of condensers, and the two stages of condensers condense the solvent steam according to the gradually decreased temperature and intercept micro-droplet impurities; and the composite adsorption module is used for adsorbing residual organic trace impurities and removing water. The impurity deep removal and purification device in ES fiber solvent recovery has the advantages of being low in energy consumption, easy and convenient to maintain, stable in operation and capable of being continuously online for 72 h or above without shutdown, the solvent recovery rate is remarkably increased, the operation cost is reduced, and the potential risk of organic vapor emission to the environment and operation safety is effectively avoided.

The invention discloses a lightweight alumina foamed ceramic refractory material and a preparation method thereof, and relates to the technical field of ceramic materials. When the light aluminum oxide foamed ceramic refractory material is prepared, zirconium acetylacetonate, yttrium nitrate hexahydrate and aluminum nitrate nonahydrate are mixed to prepare a spinning solution for electrostatic spinning, nano aluminum titanate is loaded by using a nano spraying technology during spinning, and doped modified zirconium oxide fibers are prepared after high-temperature heat treatment and defibering and dispersing; mixing aluminum oxide micro powder, hollow aluminum oxide, a high-temperature foaming agent, doped modified zirconium oxide fibers and a sintering aid, and then performing ball milling and sieving to prepare aluminum oxide-based mixed powder; and carrying out mold pressing on the alumina-based mixed powder to prepare a green body, sintering, and cooling to prepare the lightweight alumina foamed ceramic refractory material. The light aluminum oxide foamed ceramic refractory material prepared by the invention has the advantages of light weight, low thermal conductivity, high compressive strength, high bending strength and good thermal shock resistance.

The invention provides a needle-base-free multi-needle electrostatic spinning nozzle which comprises a liquid conveying base, a liquid storage base, a conductive assembly and multiple spinning needles, the distance between every two adjacent spinning needles is 1-3 mm, the inner diameter of each spinning needle is 0.1-0.3 mm, and the outer diameter of each spinning needle is 0.3-0.5 mm. Compared with the prior art, the multiple spinning needle heads are directly connected with the current-conducting plate, so that the distance between the adjacent needle heads is shortened to 1-3 mm, and short-distance ordered array nanofiber preparation is achieved; a plurality of second through holes are formed in the current-conducting plate, so that the array mode of the spinning needle heads on the current-conducting plate can be flexibly adjusted according to production requirements to meet the preparation requirements of different nanofiber arrays.

The invention relates to the technical field of flexible electronic sensing, and particularly discloses a composite fiber membrane-based capacitive flexible pressure sensor integrated system and a preparation method thereof. The sensor is composed of a composite fiber membrane sensitive layer, an interlayer type electrode structure, a multi-channel signal acquisition module and an intelligent data processing system. Wherein the composite fiber membrane is prepared through an electrostatic spinning technology, polyvinylidene fluoride serves as a matrix, ionic liquid with the mass ratio of 40%-70% is evenly dispersed, a three-dimensional porous structure is formed, and a pressure signal is converted into capacitance change through the double-electric-layer capacitance effect; the signal acquisition module adopts a high-precision capacitance digital converter to cooperatively work with a microcontroller, 9-channel parallel data acquisition is realized, the resolution reaches 6aF, and data is transmitted through an anti-interference bus protocol; and the data processing system dynamically analyzes the pressure-capacitance relationship based on an exponential function model, suppresses noise to be below 0.1 aF RMS in combination with a filtering algorithm, and synchronously generates a visual pressure distribution map.

The invention discloses a preparation method and equipment of three-chamber eccentric parallel structure nanofibers. The preparation method comprises the following steps: simultaneously carrying out high-voltage electrostatic spinning on three spinning solutions; the two spinning solutions are respectively divided into microfluids to be led out through an array formed by two sets of series metal capillary tubes; the other spinning solution is divided into microfluids to be led out through a plurality of bottom through holes of the insulating container; the first series of metal capillary tubes are inserted into the second series of metal capillary tubes to form a series of metal capillary eccentric sleeves; the series of metal capillary eccentric sleeves penetrate through the insulating container and extend out of one side of the interior of the bottom through hole to form a combined eccentric outlet of three strands of spinning solutions; three spinning solutions are guided into a high-voltage electrostatic field in an eccentric parallel mode through the combined eccentric outlet, and the three-chamber eccentric parallel structure nanofiber is formed through single-step direct stretching. According to the method, the capability of preparing the three-chamber eccentric parallel structure characteristic nanofiber with a complete structure in a single-step, batch and large-scale manner is endowed.

The invention discloses a method for preparing micro-nano fibers through needle-free electrostatic spinning equipment assisted by an ion blower gun, and belongs to the technical field of spinning. The method specifically comprises the following steps: S1, dissolving a high-molecular polymer in a proper solvent to prepare a spinning precursor solution; and S2, preparing the micro-nano fiber from the spinning solution on a suitable collection surface by using an ion blower gun assisted needleless electrostatic spinning device. Through the synergistic effect of directional airflow generated by the ion blower gun and a controllable electric field, fiber surface charges are effectively neutralized, the jet instability is inhibited, and the controllability of a fiber flight path is improved. Meanwhile, the ionic wind assists in enhancing interface attachment between the fiber and the collector, uniform deposition is promoted, and the compactness and adhesive force of the fiber membrane are remarkably improved. According to the method, chemical modification does not need to be carried out on a material system, the intrinsic performance of the fiber is kept, universality and expandability are achieved, and a new path is provided for continuous preparation of the high-performance micro-nano fiber.

The invention discloses a composite hydrophobic fiber membrane based on a friction nano-generator and a preparation method of the composite hydrophobic fiber membrane. The composite hydrophobic fiber membrane is composed of a polyvinylidene fluoride nanofiber membrane, boracite particles, hydrophobic nanoparticles and polyvinylidene fluoride microspheres. The boracite particles are embedded in fibers of the polyvinylidene fluoride nanofiber membrane, and the hydrophobic nanoparticles are uniformly attached to the polyvinylidene fluoride microspheres and the polyvinylidene fluoride nanofiber; the hydrophobic nano particles are titanium dioxide nano particles or zirconium dioxide nano particles. The preparation method comprises the following steps: dispersing boracite powder and polyvinylidene fluoride powder into N, N-dimethylformamide to prepare an electrostatic spinning solution; the preparation method comprises the following steps: dispersing hydrophobic nanoparticles and polyvinylidene fluoride powder into N, N-dimethylformamide to prepare an electrostatic spraying solution; the composite hydrophobic fiber membrane is prepared through synchronous electrostatic spinning and electrostatic spraying. The problem that a modified polyvinylidene fluoride fiber membrane friction nanometer generator is low in output electrical performance in a high-humidity environment can be solved.

The invention provides a skin-core structure moisture power generation yarn, the yarn at least comprises a metal core layer, a wrap yarn layer and a conductive coating, the wrap yarn layer comprises lithium chloride doped polyvinyl alcohol fibers and tightly wraps the periphery of the metal core layer through conjugate electrostatic spinning, and the conductive coating is nano conductive silver paint. And the conductive coating is not in direct contact with the metal core layer. The preparation method comprises the following steps: firstly, adding lithium chloride powder into deionized water, stirring at normal temperature until complete dissolution, then adding polyvinyl alcohol powder, heating and stirring until complete dissolution, standing and defoaming to prepare a wrap yarn layer spinning solution; performing conjugate electrostatic spinning on the prepared skin layer spinning solution to form nanofiber wrap yarn on the outer layer of the metal core; nano conductive silver paint is sprayed on the surface of the wrap yarn layer, and the wrap yarn layer is dried in the air. The yarn has good flexibility, and has excellent surface waterproof and moisture permeable performance, stability and reusability while forming stable output current and voltage.

The invention belongs to the technical field of multifunctional heat-conducting materials, and relates to a heat-conducting super-hydrophobic flexible film and a preparation method thereof. Comprising the following steps: adding boron nitride powder into a mixed solution of isopropanol and deionized water to obtain a boron nitride solution; ultrasonically stripping the boron nitride solution, centrifuging, washing and drying to obtain boron nitride nanosheets; the preparation method comprises the following steps: dispersing boron nitride nanosheets in a mixed solution of N, N-dimethylformamide and tetrahydrofuran, carrying out ultrasonic treatment, adding thermoplastic polyurethane, and heating and stirring until the thermoplastic polyurethane is completely dissolved to obtain a TPU / BNNSs spinning solution; preparing the TPU / BNNSs spinning solution into a fiber film through an electrostatic spinning process, drying and stripping to obtain a TPU / BNNSs composite film; siO2 is added into a PDMS solution, ultrasonic dispersion is performed to obtain a mixed solution, the mixed solution is sprayed on the surface of the TPU / BNNSs composite film, and the heat-conducting super-hydrophobic flexible film is obtained after drying and curing. The problem that the performance of a traditional heat conduction material is reduced in a complex environment is effectively solved, and the heat conduction material is suitable for application scenes needing to meet the heat dissipation and antifouling requirements at the same time.

The invention provides a woven nerve conduit with piezoelectric performance and a preparation method and application thereof, and belongs to the field of nerve conduits.The preparation method comprises the steps that degummed silk is soaked in a dopamine hydrochloride solution, sodium hydroxide is added to adjust the pH value, and stirring is conducted to obtain polydopamine modified degummed silk; dispersing the polydopamine modified degummed silk, EDOT and FeCl3. 6H2O in an ethanol solution, stirring, centrifuging, washing and drying to obtain PEDOT modified degummed silk; the degummed silk modified by PEDOT is used as weaving yarn, and a nerve conduit skeleton is woven through a three-dimensional weaving technology; preparing a glycine solution, crystallizing and grinding to obtain beta-type glycine; pLLA particles are dispersed in hexafluoroisopropanol to be dissolved, beta-type glycine is added to obtain a PLLA-coated Gly solution, a PLLA-coated Gly fiber membrane is prepared on the surface of a nerve conduit skeleton through electrostatic spinning, and the woven nerve conduit with the piezoelectric property is obtained. The novel nerve conduit is developed by combining the three-dimensional weaving technology and the piezoelectric material, and a better solution is provided for nerve restoration.

The invention relates to a preparation method for improving the bulkiness of cloud wool fibers, and relates to the technical field of fiber material preparation, and the preparation method comprises the following steps: preparing primary gel; preparing secondary cross-linked gel through step-by-step cross-linking of sodium silicate and a covalent organic framework material; preparing a fiber template by electrostatic spinning, placing the secondary cross-linked gel on the fiber template, and pressurizing to obtain a gel template complex; immersing the fiber template complex into a 1, 3, 5-triformyl benzene solution, and heating for reaction to obtain a semi-finished product; carrying out gradient solvent replacement on the semi-finished product, and carrying out modification treatment by using a hexadecyltrimethoxysilane solution to obtain a modified semi-finished product; and drying the modified semi-finished product at normal pressure by adopting gradient heating to obtain the aerogel cloud wool fiber. The method has the effects of improving the bulkiness and the heat insulation and heat preservation performance of the cloud wool fiber, the fiber density is low, and the lightweight property is good.

The invention belongs to the technical field of waterproof and moisture permeable membrane materials, and particularly relates to a bio-based microporous membrane based on a template and a preparation method and application thereof, and the preparation method comprises the following steps: dispersing one of polybenzimidazole, aminated PI and carboxylated PBO and modified CNF into a DMF / water system; performing electrostatic spinning on the high-viscosity spinning solution; carrying out low-temperature vacuum drying treatment on the modified nanofiber self-supporting framework; coating and filling the bio-based polyurethane resin into the bio-based microporous membrane template, and carrying out negative pressure adsorption until the filling is uniform; and carrying out gradient drying on the bio-based wet membrane to obtain the bio-based microporous membrane. Compared with the prior art, the problems that in the prior art, the mechanical property or stability of bio-based polyurethane is insufficient, and a nanofiber reinforcing technology is difficult to combine with the bio-based polyurethane are solved. A nanofiber self-supporting framework with a stable structure is prepared through an electrostatic spinning technology, and then the nanofiber self-supporting framework is compounded with bio-based polyurethane to form a microporous membrane layer with waterproof and moisture permeable functions.

The invention discloses a flexible lanthanum zirconate-alumina fiber membrane as well as a preparation method and application thereof, and belongs to the technical field of inorganic nonmetal ceramic fiber materials. The preparation method comprises the following steps: dissolving zirconium oxychloride octahydrate, lanthanum chloride heptahydrate and aluminum chloride hexahydrate into absolute methanol, sequentially adding acetylacetone and triethylamine, stirring, and drying under reduced pressure to obtain a zirconium-lanthanum-aluminum polymer precursor containing triethylamine hydrochloride; soaking the zirconium-lanthanum-aluminum polymer precursor containing triethylamine hydrochloride in acetone, standing, filtering, concentrating under reduced pressure, and drying to obtain a zirconium-lanthanum-aluminum acetylacetone polymer precursor; the preparation method comprises the following steps: preparing a spinning solution from a zirconium-lanthanum-aluminum acetylacetone polymer precursor, absolute methanol serving as a solvent and polyoxyethylene serving as a spinning aid, and carrying out electrostatic spinning on the spinning solution to obtain a lanthanum zirconate-aluminum oxide precursor fiber membrane; and performing heat treatment on the lanthanum zirconate-aluminum oxide precursor fiber membrane to obtain the flexible lanthanum zirconate-aluminum oxide fiber membrane. According to the preparation method, acetylacetone is added into zirconium oxychloride, lanthanum chloride and aluminum chloride for coordination to form a linear zirconium-lanthanum-aluminum acetylacetone polymer, so that the technical problem that lanthanum zirconate long fibers with high strength and good flexibility are difficult to obtain is solved.

The invention discloses a composite fiber membrane for hydrogen production and oxygen production through light-driven full water decomposition and a preparation method of the composite fiber membrane, and belongs to the technical field of photocatalysis technology and nano material preparation, and the composite fiber membrane shows excellent photothermal conversion performance in the reaction of hydrogen production and oxygen production through light-catalyzed water decomposition and also has efficient water transmission capacity. The stability and the reusability are relatively high. According to the preparation method, a Ti source compound, a Sr source compound, tetraethyl orthosilicate and a spinning solution are used as raw materials for electrostatic spinning, and after pre-oxidation and carbonization treatment at a certain temperature, the SrTiO3 / SiO2 composite carbon fiber membrane is obtained, and Cr2O3 / Rh and CoOOH cocatalysts are supported. The fiber membrane prepared by the invention has the function of photocatalytic water decomposition to produce hydrogen under the irradiation of sunlight, can stably produce hydrogen and oxygen in various water resources, is simple in process and low in cost, and can be widely applied to the fields of energy sources, environmental protection and the like.

The invention discloses a PEM proton exchange membrane for water electrolysis and a preparation method thereof, and relates to the technical field of water electrolysis. The proton exchange membrane is composed of five layers of structures including a modified sulfonated composite resin layer, an enhancement layer, a water retention layer, a catalyst layer and an anti-permeation layer, the preparation method comprises the following steps: the modified sulfonated composite resin layer is prepared by dispersing perfluorinated sulfonic acid resin and sulfonated lignin in a solvent, coating and drying; the reinforcing layer is prepared by blending a PTFE (Polytetrafluoroethylene) emulsion, a carbon nanotube and a tetrafluoroethylene-hexafluoropropylene copolymer, and then carrying out casting sintering, plasma treatment and hot press molding; the water retention layer is prepared by adopting an electrostatic spinning technology; the catalyst layer is formed by spraying a precursor solution step by step and drying; the anti-permeation layer is prepared through photoetching-etching array construction, resin coating and fluorosilane modification. The prepared proton exchange membrane has excellent mechanical strength, proton conductivity and stability, and is suitable for the field of PEM water electrolysis.

The invention discloses an anisotropic electrostatic spinning patch with ultrasonic response and a preparation method thereof, a fiber membrane with a controllable anisotropic structure is constructed by a biodegradable polymer, antibacterial nanoparticles and a photoinitiator system through a step-by-step directional electrostatic spinning process, so that the mechanical matching property of the fiber membrane is improved; cell growth can be directionally guided and tissue regeneration can be accelerated by combining the piezoelectric material characteristics of the introduced biodegradable polymer with piezoelectric characteristics and electric field stimulation induced by the fiber topological structure; meanwhile, a zwitterionic coating is generated on the surface of the fiber membrane in situ by utilizing a single-sided photocuring technology, and an anti-adhesion function is realized on the single side of the fiber membrane. Furthermore, the soft tissue repair patch which has multiple functions of adjustable mechanical property, infection resistance, adhesion resistance and the like and has better structural mechanical suitability, function integration and tissue regeneration guiding capability is prepared by adopting the anisotropic electrostatic spinning patch with ultrasonic response.

The invention discloses a preparation method and application of samarium-doped lanthanum ferrite nanofibers, and the preparation method is a design thought based on synergistic interaction of'defect engineering 'and'morphology control': samarium (Sm) ions with a specific proportion are creatively introduced to the A site of LaFeO3, and lattice distortion is induced by utilizing radius mismatch between the samarium (Sm) ions and lanthanum (La) ions; therefore, high-concentration gas-sensitive active sites (oxygen vacancies) are generated in the intrinsic structure of the material; and the material is constructed into a one-dimensional nanofiber network with a high specific surface area through an electrostatic spinning technology, so that the exposure efficiency of active sites is maximized.

A boron-doped graphene composite solid-state electrolyte and its preparation and application. A mixed solution of polyacrylonitrile (PAN) and N,N-dimethylformamide is prepared into a PAN porous film using electrospinning technology. A PEO casting solution is prepared by mixing boron-doped graphene, polyethylene oxide, lithium bis(trifluoromethanesulfonylimide), and acetonitrile. This solution is then cast onto the PAN porous film and, after vacuum drying, forms a composite solid-state electrolyte with polyacrylonitrile fibers as a support, polyethylene oxide as a matrix, and boron-doped graphene as a filler. The composite solid-state electrolyte prepared by the present invention has high ionic conductivity and lithium ion transference number, providing lithium batteries with good rate performance and cycle stability.