10571 results about "Spinning" patented technology

The invention relates to a hot-rolled wire rod for a 2200MPa bridge cable and a manufacturing method of the hot-rolled wire rod, a high-carbon V-containing chemical component design rolling production line is adopted, after the wire rod is spun into the wire rod at the spinning temperature of more than or equal to 920 DEG C, online molten salt rapid cooling isothermal treatment is carried out, the molten salt treatment time is controlled to be less than or equal to 300s, the wire rod is cooled at the cooling speed of more than or equal to 35 DEG C / s, and enters a sorbite phase region from an austenite state; according to the hot-rolled wire rod, a structure with sorbite as the main part is formed and subjected to isothermal weak tempering to remove stress, finally, roller way slow cooling is conducted, the hot-rolled wire rod with the microscopic structure comprising a mixed structure composed of weak tempered sorbite as the main part and ferrite and fused pearlite as the balance is prepared, the tensile strength can reach 1550-1590 MPa, the percentage reduction of area is 31%-36%, the mechanical property same-circle difference is smaller than or equal to 30 MPa, and the hot-rolled wire rod can be used for manufacturing the steel wire rod. The method is used in the application field of manufacturing of 2200MPa-grade ultrahigh-strength bridge cables and the like, the risk of wire breakage is reduced, and the strength grade of the bridge cables is improved.

The invention discloses a preparation method of PEDOT: PSS (poly (3, 4-ethylenedioxythiophene): poly (styrenesulfonate))-based composite fiber with silver nanoparticles loaded on the surface. The method comprises the following steps: uniformly mixing a silver nanowire solution with a PEDOT: PSS solution, or uniformly mixing the silver nanowire solution, the PEDOT: PSS solution and a polymer solution to obtain a spinning solution; extruding the spinning solution into a coagulating bath through a wet spinning process and soaking to obtain nascent composite fibers; and drying the nascent composite fiber to obtain the PEDOT: PSS-based composite fiber of which the surface is loaded with silver nanoparticles and the interior contains silver nanowires. The interior and surface structures of the PEDOT: PSS fiber are simultaneously modified, the interior of the fiber contains a silver nanowire structure, and the surface of the fiber has a silver nanoparticle structure. The composite fiber has the characteristics of ultra-sensitive SERS sensing capability, high conductivity, electric heating, molten drop resistance and antibacterial property.

The invention discloses a hydrophobic-hydrophilic Janus water collecting film and an efficient preparation method thereof, and belongs to the field of water collecting materials. An electrostatic spinning process is adopted, and a hydrophobic polymer is accurately deposited on the surface of a hydrophilic substrate in the form of a nanofiber array, so that the Janus composite membrane with an asymmetric wetting gradient structure is successfully constructed. The unique double-sided wettability difference drives the liquid drops to realize directional transmission, and the core mechanism of the liquid drops is derived from capillary force regulation and control caused by interfacial wetting potential energy difference. The Janus membrane shows excellent performance in the aspect of air moisture trapping, the ultra-fast moisture absorption characteristic and the surface regeneration capacity are achieved, and compared with a traditional single-layer hydrophilic membrane, the water collecting efficiency is remarkably improved by 110%. A one-step forming process is adopted for preparation, the diameter of the nanofibers is controllable, complex post-treatment procedures are not needed, and energy consumption required by equipment is low. The high-performance water collecting film has important application value in the fields of atmospheric water taking in arid regions, dehumidification of precise instruments and the like.

The invention relates to the technical field of regeneration of waste polyester, in particular to a polyester micro-plastic recycling and impurity removing method and equipment. According to the method, the irradiation technology is adopted for treating the polyester micro-plastic, the polyvinyl chloride is removed by combining electron beam irradiation with the specific gravity method, the radiation dosage and time are accurately controlled, the polyvinyl chloride in the polyester micro-plastic can be effectively removed, the color of the polyester micro-plastic is not affected, and the treated polyester micro-plastic can meet the spinning requirement. The equipment is used for realizing the impurity removal method and comprises irradiation treatment equipment, a separation tank, a cleaning tank, a dehydrator and a drying tower. The equipment is simple in structure and convenient to operate, the radiation dosage and time can be accurately controlled in the impurity removal process, the surface temperature of the polyester micro-plastic is effectively controlled, and production and popularization are easy.

The invention relates to a flame-retardant and heat-insulating aerogel composite material as well as a preparation method and application thereof, and belongs to the technical field of novel building materials. The fiber aerogel is prepared through coaxial electrostatic spinning, an injector containing a polymer spinning solution is connected to a skin layer needle tube connecting port, an injector containing air is connected to a core layer needle tube connecting port, coaxial electrostatic spinning is carried out to prepare micron fibers with skin-core structures, the micron fibers fall on a receiving base material, and the micron fibers with the skin-core structures fall on the receiving base material. A hollow fiber aerogel material with a three-dimensional fluffy structure is obtained, in-situ growth of hydrated nano silicate particles is carried out after thermal crosslinking treatment, the nano silicate particles grow along the fiber surface and cover the micron fiber surface of the hollow fiber aerogel material, and the aerogel composite material is obtained. The hydrated nano silicate particle growth solution comprises polyvinyl alcohol, calcium salt, silicate and aluminum salt. The prepared aerogel composite material has excellent flame retardance and heat insulation performance and is suitable for being used as a building material.

The invention relates to the technical field of spinning production, and discloses a multi-process spinning energy consumption optimization decision system, which comprises a data acquisition module, an energy consumption analysis module, a strategy generation module, a scheduling optimization module, a reference comparison module and a decision output module. The data acquisition module acquires equipment parameters and energy consumption data and sets a monitoring interval; the energy consumption analysis module divides process nodes and generates energy consumption feature vectors; the strategy generation module extracts key indexes to establish optimization rules; the scheduling optimization module identifies the operation mode and calculates the energy consumption fluctuation amplitude; the reference comparison module deduces an optimal energy consumption threshold value and generates a deviation sequence; and the decision output module integrates the deviation sequence to form an optimized decision scheme. According to the system, fine management and dynamic optimization of energy consumption of the whole spinning process are achieved, the energy utilization efficiency is improved, the production cost is reduced, and the system is suitable for energy consumption optimization control in the spinning production process.

The invention relates to the field of textile materials, and provides an antibacterial breathable yarn obtained by blended spinning of polyester fibers, polyamide fibers, cotton fibers and elastic fibers. The polyester fiber is prepared through melt blending and spinning processes and comprises polyethylene glycol terephthalate slices, modified chitosan zinc oxide, an antioxidant 1010, a POE elastomer, polyether modified silicone oil and polyethylene glycol 200, and the modified chitosan zinc oxide is prepared by compounding chitosan cinnamyl aldehyde Schiff base and silane modified zinc oxide. The chitosan cinnamyl aldehyde Schiff base is prepared through a Schiff base condensation reaction of chitosan and cinnamyl aldehyde, and the silane modified zinc oxide is prepared from nano rod-shaped zinc oxide particles modified by isocyanate propyl triethoxy silane. The yarn has excellent antibacterial property, air permeability and flexibility and is further used for knitting antibacterial breathable socks, the knitting density of the sock bottom part is reduced to enhance the air permeability, the knitting density of the sock opening part is improved to improve the elasticity and the fitting degree, and the yarn has wide application value.

The invention discloses a preparation method of an ultrahigh-reflectivity radiation refrigeration fiber membrane, which comprises the following steps: dissolving a polymer in an organic solvent to prepare an electrostatic spinning precursor solution, and adjusting parameters such as the concentration of the electrostatic spinning precursor solution, spinning voltage, spinning distance, roller rotating speed, liquid supply rate, slide rail reciprocating rate and the like to prepare the ultrahigh-reflectivity radiation refrigeration fiber membrane. And preparing the ultrahigh-reflectivity radiation refrigeration fiber membrane with a porous structure, wherein the reflectivity of the ultrahigh-reflectivity radiation refrigeration fiber membrane is greater than 95% at the sunlight wave band of 0.3-2.5 microns. In the dissolving process of the polymer in the organic solvent, the water bath stirring temperature is 20-60 DEG C, the stirring time is 3-6 hours, a bilateral multi-nozzle opposite layout is adopted in electrostatic spinning, the spinning distance is 15-30 cm, the electrostatic spinning voltage is 20-50 kV, the rotating speed of a roller is 400-1000 r / min, the spinning liquid supply rate is 8-30 ml / h, the reciprocating rate of a sliding rail is 3-10 mm / s, and the thickness of the ultrahigh-reflectivity radiation refrigeration fiber membrane is 300-500 microns. The radiation refrigeration film prepared through the method can be prepared in batches, has good flexibility and can be widely applied to the fields of clothes, buildings, equipment and the like.

The invention belongs to the technical field of fiber materials, and relates to a micro-gear-shaped special-shaped stretchable conductive anti-radiation fiber and preparation and application thereof, a core layer spinning solution and a shell layer spinning solution are subjected to coaxial wet spinning to prepare the micro-gear-shaped special-shaped stretchable conductive anti-radiation fiber; the core layer spinning solution is obtained by dissolving TPU in anti-radiation particles I / anti-radiation particles II / organic solvent dispersion, and the shell layer spinning solution is obtained by dissolving TPU in MXene / organic solvent dispersion; the mass volume ratio of the TPU to the organic solvent in the core layer spinning solution is (2.2-3g): 10ml, and the mass volume ratio of the TPU to the organic solvent in the shell layer spinning solution is (0.5-1g): 10ml; the anti-radiation fiber is of a core-shell structure, the cross section of a core layer is circular, the cross section of a shell layer is of a micro-gear-shaped special-shaped structure, and the average height of gear protrusions is 20-50 m; when being applied, the fabric is processed into a stretchable multifunctional fabric by adopting a weaving process. According to the method, a coaxial wet spinning process is adopted to prepare the product in one step; the product has high sensitivity and a wide sensing range; the application range is wide.

The invention belongs to the technical field of conveying devices and relates to the technical field of conveying devices. The conveying devices comprise a bottom frame, a frame is fixedly connected to the top of the bottom frame, a discharging assembly is fixedly installed on the frame, groove bodies are symmetrically formed in the frame, supporting plates are fixedly installed in the groove bodies, conveying belts are arranged on the supporting plates in a surrounding mode, and driving wheels are symmetrically arranged in the groove bodies. The two driving wheels are in transmission connection through a conveying belt, a driving mechanism for driving the conveying belt to move is arranged on the frame, and supporting blocks are arranged on the conveying belt in an array mode. In particular to a textile roller packaging and conveying device for textile processing, according to the textile roller packaging and conveying device for textile processing, the stability of a textile roller can be improved through an arranged negative pressure head, the textile roller can be conveniently and stably conveyed, a negative pressure state is formed in a negative pressure box, and when one end of the textile roller moves into a groove, the textile roller can be conveniently conveyed. And the negative pressure head can be attached to the spinning roller, and negative pressure can be generated to limit the position of the spinning roller, so that the stability of the position of the spinning roller is improved.

The invention discloses a phase change energy storage waterborne polyurethane nanofiber membrane and a preparation method thereof. Lignin-based phase change microcapsules are prepared by combining ultraviolet crosslinking with lignin shell packaging, and then the nanofiber membrane containing the phase change microcapsules is prepared through an electrostatic spinning technology. And finally, constructing the waterborne polyurethane phase change fiber membrane with asymmetric wettability through a low-temperature plasma technology. According to the invention, lignin is self-assembled to form nanoparticles, and ultraviolet light induces free radical polymerization to form a polymer film, so that the packaging capability of the phase change material is improved. The phase change microcapsule prepared by the method is high in packaging efficiency and excellent in phase change performance, the preparation process is green and environment-friendly, the technological operation is simple, the temperature of the prepared phase change energy storage waterborne polyurethane nanofiber membrane conforms to the comfortable temperature range of a human body, and the phase change energy storage waterborne polyurethane nanofiber membrane has excellent temperature regulation, waterproof and moisture permeable performance and is suitable for being used in the field of water treatment. Good application prospects are realized in the field of functional textiles with functions of intelligent temperature regulation, water resistance and air permeability and the like.

The invention relates to the technical field of hollow gel fibers, in particular to a hollow aramid aerogel fiber and a preparation method thereof. By combining wet spinning with a chemical foaming method, the inner diameter, the outer diameter and the wall thickness of the fiber and the size on a fiber wall hole are regulated and controlled, the hollow aramid aerogel fiber with the high porosity is formed, and the hollow aramid aerogel fiber has high selectivity and high flux, has the properties of flame retardance, heat insulation, high mechanical strength and the like, and is suitable for large-scale production. The use performance and the application range of the aerogel fiber in the prior art are improved and expanded.

The invention discloses a graphene fiber and resin composite material with high thermal conductivity. The graphene fiber and resin composite material comprises continuous graphene fiber filaments, wherein the surfaces of the continuous graphene fiber filaments are coated with a sizing agent; the surface of the graphene fiber is coated with the modified epoxy resin; the preparation method comprises the following steps: preparing continuous and uniform graphene oxide fiber filaments through a wet spinning technology; fully reducing the graphene oxide fiber through a chemical reduction method; performing graphitization treatment on the graphene oxide fiber subjected to chemical reduction at ultrahigh temperature to obtain graphene fiber; then the graphene fiber laying layer is put into a mold coated with demolding wax, each layer of fiber is fixed with epoxy resin, and demolding cloth covers the graphene fiber laying layer after the graphene fiber laying layer is finished and is used for demolding and absorbing redundant resin; the graphene fiber / resin composite material prepared by the preparation method disclosed by the invention not only has good heat-conducting property, but also has relatively good interface property.

The invention provides a slit type bubble electrostatic spinning device assisted by hot air flow. The slit type bubble electrostatic spinning device comprises a hot air flow channel, a slit type metal solution channel, a bubble pipe and an electrostatic generator. The hot air flow channel and the slit type metal solution channel are circular truncated cone-shaped pipelines formed by gradually narrowing inner and outer pipes; the pipe diameter of an inner pipe of the hot air flow channel is the same as that of an outer pipe of the slit type metal solution channel; the slit type metal solution channel penetrates through the inner pipe of the hot air flow channel and is fixedly attached to the inner pipe of the hot air flow channel, the bubble pipe extends and is fixed to the inner pipe of the slit type metal solution channel, and the electrostatic generator is connected with the slit type metal solution guide pipe through a wire. The arrangement of polymer molecular chains in the solution is improved through the slit type metal solution channel, high-speed hot airflow is provided by the circular-truncated-cone-shaped hot airflow channel to upwards support bubbles from the periphery and assist the polymer molecular chains to be evenly distributed in parallel with the surfaces of the bubbles, and the enhanced nanofibers are prepared by improving the internal structure of the nanofibers.

The invention discloses a mixed gas-imitating gel fiber as well as a preparation method and application thereof, and belongs to the technical field of fiber materials. The mixed gas-imitating gel fiber is prepared from the following components: cellulose dispersion liquid, a silane coupling agent and viscose in a mass ratio of (1-3): (0.2-0.8): (5-10), comprising the following steps: adding sodium hydroxide into a cellulose dispersion liquid, adjusting the pH value to be alkaline, adding viscose and a silane coupling agent, and carrying out ultrasonic stirring to prepare a mixed spinning solution; the mixed spinning solution is extruded into a coagulating bath through a wet spinning device to be drafted, wet fibers are obtained, and the mixed gas-imitating gel fibers are obtained after freeze drying. The aerogel fiber disclosed by the invention has low heat conductivity coefficient, high mechanical strength and extreme temperature resistance, can solve the problem that the densification and porosity of a traditional fiber structure are difficult to balance, and effectively expands the application prospect of the aerogel fiber in the fields of cold protection, warm keeping and the like.

The invention relates to a preparation method of a coaxial cellulose-based aerogel fiber fabric for daytime radiation refrigeration, which is characterized in that coaxial fibers take pure cellulose as a core, a skin layer comprises hollow silicon dioxide and low-concentration cellulose, and the hollow silicon dioxide is uniformly dispersed in the cellulose; the preparation method comprises the following specific steps: S1, preparing hollow silicon dioxide with an adjustable particle size; s2, preparing a hollow silicon dioxide / cellulose mixed spinning solution; s3, dissolving cellulose; s4, carrying out coaxial wet spinning; s5, carrying out multi-step solvent replacement; s6, performing continuous normal-pressure drying; s7, weaving fibers; the woven aerogel fiber fabric can effectively scatter sunlight, and the solar reflectivity (gt; 92%), and the emissivity (gt; 96%); the preparation method is green and environment-friendly, the operation is simple, the continuous and large-scale production of the cellulose-based aerogel fiber can be realized, and the prepared coaxial aerogel fiber fabric can show excellent radiation refrigeration performance in the daytime.

The invention relates to a preparation method of a high-antibacterial hydrophobic polyamide fiber. The preparation method comprises the following steps: carrying out melt extrusion grafting on polyamide, a quaternary ammonium salt monomer, an initiator and an auxiliary agent to prepare quaternary ammonium salt grafted polyamide; and carrying out melt blending on the prepared quaternary ammonium salt grafted polyamide, polyamide, cuprous oxide and polydimethylsiloxane to obtain the high-antibacterial hydrophobic nylon composite material. And spinning the high-antibacterial hydrophobic nylon composite material to obtain the high-antibacterial hydrophobic polyamide fiber. The high-antibacterial hydrophobic nylon composite material prepared by the method disclosed by the invention can realize efficient antibacterial performance, and the high antibacterial hydrophobic performance of the prepared polyamide fiber is improved.

The invention relates to a high-antistatic crude oil type polyester FDY spinning oil agent and a preparation method thereof, a composition of sodium lauryl polyoxyethylene ether sulfate and potassium lauryl phosphate is used as a main antistatic agent, an antistatic smoothing agent with sulfonated chitosan and PEG800 as key components is adopted, the antistatic smoothing agent and the main antistatic agent have a synergistic effect, and the antistatic property of the spinning oil agent is improved. The overall antistatic property of the oiling agent is enhanced. The preparation method comprises the following steps: pre-balancing the materials at 40-50 DEG C before charging; then, sequentially adding an antistatic smoothing agent, a penetrating agent, a bundling agent, a main antistatic agent and an anti-coking agent, and adding materials while stirring; and finally, controlling the temperature of the reaction kettle to be 40-50 DEG C and the stirring speed to be 500-700r / min, and reacting for 0.5-1.5 hours. The crude oil type polyester FDY oiling agent is excellent in antistatic property, and polyester FDY spinning can be carried out in a crude oil direct oiling mode at the ultrahigh spinning speed of 4000 m / min.

The present application belongs to the field of polymer material technology, and in particular, relates to a polyimide composite material, a preparation method thereof, and an application thereof. The preparation method of the polyimide composite material comprises the steps of: preparing a polyamic acid slurry from a diamine monomer, a dianhydride monomer, and an organic solvent; preparing a mixed slurry from the polyamic acid slurry and a nanomaterial, and then performing a spinning imidization treatment to obtain a polyimide composite material; wherein the nanomaterial comprises at least one of nano silicon carbide, aluminum nitride, carbon nanotubes, graphene, and nano silicon dioxide. By blending polyimide with other nanomaterials having high thermal conductivity to improve its thermal conductivity, the thermal conductivity of the polyimide composite material is optimized and improved, and its heat dissipation capacity in a high temperature working environment is enhanced, while having high tensile strength and thermal conductivity. The service life of the polyimide composite material is extended, and its application range can be further expanded, such as in the back panel assembly of a smartphone.

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 relates to the technical field of wastewater resourceful treatment, in particular to a functional membrane for recycling precious metals in wastewater and a preparation method of the functional membrane. The specific preparation method comprises the following steps: preparing a polyamide spinning solution, carrying out electrostatic spinning on the spinning solution to form a polyamide fiber net, stably combining hollow mesoporous nano silicon dioxide on the fiber net through carboxymethyl chitosan, and grafting an epoxy silane coupling agent on the surface of the hollow mesoporous nano silicon dioxide to obtain the hollow mesoporous nano silicon dioxide fiber net. Finally, adipic dihydrazide is grafted on the hollow mesoporous nano silicon dioxide through a ring-opening reaction. Organic polyamide is used as a film forming substance, the raw material cost is low, the method is suitable for large-scale industrial production, the recovery rate of precious metal ions is high, and the film body has good mechanical strength and can stably operate for a long time.

The invention belongs to the technical field of functional fibers, and discloses a moisture-absorbing and sweat-releasing composite special-shaped chinlon 6 fiber and a preparation method and application thereof.The section of a skin layer of the moisture-absorbing and sweat-releasing composite special-shaped chinlon 6 fiber is in a three-leaf shape or a cross shape or a five-leaf shape, and the section of a core layer of the moisture-absorbing and sweat-releasing composite special-shaped chinlon 6 fiber is round; the preparation method comprises the following steps: by taking chinlon 6 slices as a core layer raw material and chinlon 6 absorbing and discharging master batches as a skin layer raw material, forming by adopting a skin-core composite spinning process to obtain fibers, sequentially soaking the fibers in a weak acid bath, a weak alkali bath and a clear water bath, taking out and drying to obtain the moisture-absorbing and sweat-releasing composite special-shaped chinlon 6 fibers, the chinlon 6 suction and discharge master batch is obtained by blending raw materials including chinlon 6 slices, boron nitride and calcium carbonate, and then melting, extruding and granulating through a double-screw extruder; according to the application, the prepared moisture absorption and sweat releasing composite special-shaped chinlon 6 fiber can be woven into a fabric. According to the invention, the mechanical property of the fiber is ensured, the moisture-conducting and sweat-discharging performance of the fiber is improved, and the sweat-discharging requirement of a human body after strenuous exercise can be met.

The invention relates to a production process of a high-elasticity heat-resistant polyester yarn, which comprises the following steps: firstly, selecting high-molecular-weight polyethylene glycol terephthalate, adding 1-3% of nano filler and 5-10% of functional copolymer, and drying at 150 DEG C for 4-6 hours to improve the stability and processability of the material; secondly, melt extrusion is conducted at 280-290 DEG C, spinning is conducted through a multi-section temperature control spinning head, and the fiber cooling uniformity is effectively controlled. Then, two times of drafting and a heat setting process are adopted, the orientation degree of a molecular chain is improved in one time of drafting, and low-temperature plasma treatment is combined to optimize the surface activity and the setting effect of the fibers. In the secondary drafting, the fiber deformation is finely adjusted at low temperature, the thermal damage is reduced, the elasticity is improved, and finally, xylanase treatment and ultraviolet curing are combined, so that the softness, the skin-friendly property and the weather resistance of the fiber are remarkably improved.

The invention discloses a photo-thermal phase change fiber material with a core-shell structure and a preparation method of the photo-thermal phase change fiber material. The method comprises the following steps: performing coaxial electrostatic spinning on a shell layer spinning solution and a core layer spinning solution to obtain core-shell structure nanofibers; soaking the core-shell structure nanofiber in the hydrophobic modification solution; and heating and drying the soaked fibers to obtain the photo-thermal phase change fiber material with the core-shell structure. The material can enhance adsorption of marine leaked crude oil through solar heating, can cope with complex weather conditions through heat storage of the phase change material, and has the advantages of simple preparation method, strong crude oil adsorption performance, environmental protection, harmlessness and the like.

The invention provides a polyvinylidene fluoride-based nanofiber yarn wave-absorbing fabric as well as a preparation method and application thereof, and belongs to the technical field of preparation of wave-absorbing composite materials. The preparation method comprises the following steps: preparing nanofiber yarns or nanofiber core-spun yarns by adopting a conjugate electrostatic spinning technology, directly adding a conductive substance into a spinning solution to form conductive nanofibers, and further coating the nanofiber yarns or the nanofiber core-spun yarns with a PDA shell layer to improve the wear resistance and reduce silver nanoparticles in situ; finally, the yarns are woven into fabric through a weaving or knitting technology, and the fabric is applied to the fields of buildings, electromagnetic protective clothing, flexible electronics and the like. Compared with an existing microwave absorbing material, the fabric-based material is light in weight and good in mechanical flexibility and processability. Fabrics formed of nanofiber yarns or nanofiber core spun yarns facilitate the induction of interfacial polarization and multiple reflections, and can deeply design material properties. The material provided by the invention has better wear resistance, wearability and microwave absorption performance, and is suitable for actual production and application.

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 provides an injectable short-fiber-based hydrogel tissue repair material with an electric response characteristic as well as a preparation method and application thereof, and the injectable short-fiber-based hydrogel tissue repair material with the electric response characteristic is prepared by taking a natural polymer material loaded with bioactive factors as a core layer material and a biodegradable material as a shell layer material through a coaxial electrostatic spinning technology. The method comprises the following steps: preparing short fibers with a core-shell structure, uniformly mixing the short fibers with a hydrogel matrix, injecting and filling a tissue defect part, and carrying out ultraviolet curing to form the tissue repair material. The injectable short-fiber-based hydrogel tissue repair material with the electrical response characteristic provided by the invention has piezoelectric characteristic and injectable characteristic, can generate electrical response through mechanical stimulation so as to promote cell proliferation and tissue repair, and also has controllable drug release capacity and good mechanical adaptability; the method is suitable for application scenes of complex tissue damage repair such as diabetes infected wound repair, articular cartilage repair, oral barrier membrane repair, abdominal wall defect repair and the like.

The invention relates to a fluoride-free polyimide-based film and a preparation method thereof. The method comprises the following steps: S1, preparing a polyamide acid solution; s2, fluorine-free organic silicon serving as a modifier is added into the polyamide acid solution and dispersed, a blended spinning solution is formed, and the solubility parameter difference value of the fluorine-free organic silicon and polyamide acid is 2.0 (MPa) 1 / 2 or below; s3, carrying out electrostatic spinning on the blended spinning solution to form a polyamide acid-based nanofiber layer; and S4, carrying out thermal imidization on the polyamide acid-based nanofiber layer to obtain the fluoride-free polyimide-based film. The film has a structure formed by three-dimensional cross-linking and winding of polyimide-based nanofibers, and the polyimide-based nanofibers are composed of a polyimide base material and fluorine-free organic silicon dispersed in the polyimide base material. The method does not involve fluorine-containing raw materials, and is environment-friendly and high in process compatibility. The film provided by the invention has excellent waterproofness, air permeability and mechanical properties at the same time.