59 results about "Electrospun nanofibers" patented technology

The novel flexible electrodes disclosed herein utilize the low bending stiffness of electrospun nanofiber mats to achieve the material properties required for surgical implantation and sustained bidirectional communication with peripheral nerves without compromising electronic functionality. According to certain embodiments disclosed herein, implantable neural electrode probes are provided which comprise a polymeric substrate having proximal and distal ends, an electrode interface at the proximal end of the substrate; at least one neural contact at the distal end of the substrate; and electrically conductive traces formed on the fibrous substrate providing electrical communication between the at least one neural contact and the electrode interface, wherein the substrate comprises a nonwoven mass of polymeric nanofibers.

The present invention relates to a non-woven filter media (100, 200) comprising: - a first melt-blown layer (102, 202) comprising fibers made from a polymer material, wherein the polymer material comprises a thermoplastic resin and at least one of a charge adjuvant and a nucleating agent; - a second layer (104, 204); and - a third layer (106, 206) arranged between the first layer and the second layer, the third layer being made of electrospun nanofibers. The present invention also relates to a filter element comprising this filter media and to a bag filter for a heating, ventilation and air conditioning system, where the bag filter comprises the filter media or the filter element.

The application belongs to the technical field of new materials in textile engineering, and provides an antibacterial aromatic microfiber suede fabric and a preparation method thereof.The preparation method comprises the following steps: placing a fabric into a 2-methylimidazole solution for immersion treatment; after the immersion treatment is completed, a zinc source solution is added into the 2-methylimidazole solution for reaction to obtain a fabric with MOF nanorods on the surface; electrospun nanofibers loaded with aromatic essential oils are deposited on the fabric with MOF nanorods on the surface to obtain an antibacterial aromatic textile base cloth layer; and the antibacterial aromatic textile base cloth layer is bonded on a microfiber suede layer to obtain the antibacterial aromatic microfiber suede fabric.The antibacterial aromatic microfiber suede fabric prepared by the application has good antibacterial performance and aromatic release function when applied to automobile interior materials.

This invention relates to the field of nanofiber technology, and particularly to a quaternary ammonium-modified PPACE-Cl nanofiber, its preparation method, and its application. S1. Preparation of PAN electrospun nanofibers: Polyacrylonitrile, polyvinylpyrrolidone, and carboxylated multi-walled carbon nanotubes are stirred with N,N-dimethylformamide at room temperature for 6-12 h to obtain a uniform and transparent spinning solution. The resulting spinning solution is then placed in a 10 mL syringe and spun in an electrospinning machine to obtain PAN / PVP / MWCNT-CCOH nanofibers. The obtained nanofibers are then placed in hot water at 60-100°C to remove PVP, yielding PAN / MWCNT-COOH nanofibers. S2. Preparation of nitrogen-enriched modified PPACE nanofibers: The PAN / MWCNT-COOH nanofibers prepared in step S1 are placed in an aqueous solution of polyethyleneimine in a high-pressure reactor to obtain modified PPACE nanofibers. S3. Preparation of quaternary ammonium-modified PPACE-Cl nanofibers. The quaternized PPACE-Cl nanofibers of this invention will prepare nanofibers with a surface rich in positive charge, thereby achieving the effect of AuCl4 exhibiting a negative charge in aqueous solution. ‑ Selective enrichment and adsorption are carried out.

The application belongs to the field of functional material preparation, and particularly relates to a preparation method of a super-light high-nucleic-acid-absorption electrospun fiber sponge material and application thereof. The SiO2 electrospun fiber is used as a framework, a three-dimensional monolithic structure assembled by fragmented electrospun nanofiber membranes is used, the interconnected nanofiber cell structures of which endow the three-dimensional monolithic structure with high porosity and excellent structural flexibility and stability. Meanwhile, the amino-rich polyethylene imine and chitosan are chemically crosslinked by using epichlorohydrin as a crosslinking agent, and finally during freeze-drying, the ice crystals are partially sublimated, leaving a pore structure, and a porous sponge material is obtained. The material has a high nucleic acid adsorption capacity, and makes nucleic acid extraction more simple, rapid and sensitive.

The object of the present invention is to provide a filtering device and a mask having an electrospun nanofiber cloth, comprising: an electrospun nanofiber cloth and a melt-blown nonwoven fabric; the melt-blown nonwoven fabric is disposed on at least one side of the electrospun nanofiber cloth and forms a filtering structure with two or more layers with the electrospun nanofiber cloth; the relationship between the fiber diameters of the electrospun nanofiber cloth and the melt-blown nonwoven fabric shows an inverse correlation; the fiber diameter of the melt-blown nonwoven fabric is 1-5 μm; the fiber diameter of the electrospun nanofiber cloth is 0.1-0.5 μm. Through the setting of the above fiber diameters, the present invention forms a filtering combination of the electrospun nanofiber cloth and the melt-blown nonwoven fabric, and has a hierarchical filtering structure with different filtering effects on substances such as solid particles, bacteria, and viruses of different sizes. Further, it has a low gram weight and a high porosity, ensuring that it will not have a large blocking effect on the air flow when there is a high-speed air flow passing through.

There is provided a hybrid nanofibrous mat comprising electrospun nanofibers formed by electrospinning of a polymer mix and porous silica capsules dispersed throughout the electrospun nanofibers during the electrospinning, the porous silica capsules having a hydrophobic liquid core containing an active. There is also provided a method of producing a hybrid nanofibrous mat comprising providing porous silica capsules having a hydrophobic liquid core containing an active, forming an electrospinning solution comprising the porous silica capsules and an electrospinning polymer mix, homogenising the electrospinning solution to fully disperse the porous silica capsules, and electrospinning the electrospinning solution to form the hybrid nanofibrous mat.

This invention discloses a glycosylated carbon dot functionalized fiber-gel composite dressing and its applications, belonging to the fields of functional materials and biomedicine. First, this invention develops a novel glycosylated carbon dot CS-ACD using a one-step hydrothermal method. This CS-ACD exhibits significantly enhanced antibacterial and anti-inflammatory activity, primarily killing bacteria through a membrane-dissolving mechanism. It also promotes the transformation of macrophages from the pro-inflammatory M1 type to the anti-inflammatory M2 type, thereby reducing the expression and secretion of inflammatory cytokines. Furthermore, this invention combines electrospun nanofibers loaded with this CS-ACD with an in-situ sprayable fibrin gel to prepare an innovative "sandwich" structured fiber-gel dressing. In an experimental mouse model of infected wounds, this dressing effectively reduces bacterial load, regulates the immune response, alleviates wound inflammation, and promotes collagen deposition and angiogenesis, ultimately accelerating wound healing and tissue repair.

The application relates to a device for promoting deep embedding of nanofibers and a use method thereof, which comprises an electrospinning device, a negative pressure air suction device, a fiber web transmission device, a fiber web charge management device and a fiber web lofting control device. The embedding channel of the electrospinning nanofibers in the fiber web is regulated through the fiber web lofting control device, and the residual charge on the screen is neutralized through the fiber web charge management device. The combined use of the devices can induce deep embedding of the electrospinning nanofibers in the thickness direction of the fiber web and effective combination between the fibers in the cross-scale, the function durability and stability of the obtained blended yarn are significantly improved, the industrial production of the cross-scale blended yarn is promoted, and the comprehensive performance of the functional textile is more effectively improved.

The antibacterial melt-blown composite non-woven fabric comprises a spun-bonded non-woven fabric layer, a first antibacterial melt-blown non-woven fabric layer, an electret melt-blown non-woven fabric, an electret electrostatic spinning nanofiber membrane and a spunlace non-woven fabric layer which are compounded with one another. According to the antibacterial melt-blown composite non-woven fabric, the antibacterial melt-blown non-woven fabric layer is used, so that the composite non-woven fabric has a good antibacterial effect. And the adsorption effect of the composite non-woven fabric can be improved by using the electret melt-blown non-woven fabric and the electret electrostatic spinning nanofiber membrane.

The present invention relates to an aerosol protective layer comprising: (i) a nonwoven carrier layer, (ii) a nanofiber layer comprising electrospun nanofibers, and (iii) a nonwoven cover layer, wherein the nanofiber layer is made from materials such as polyurethane (PU), polyacrylonitrile (PAN), polycaprolactone (PCL), polyethylene terephthalate (PET), and polyvinylidene fluoride (PVDF). The nonwoven carrier layer and cover layer are made from materials such as polypropylene (PP), polyester (PET), polyethylene (PE), and polyamide (Nylon). The protective layer offers high filtration efficiency against aerosol particles and maintains its performance even after repeated washing. The lightweight design enhances user comfort and mobility. The invention also relates to a CBRN protective suit comprising of this aerosol protective layer, providing enhanced safety, durability, and adaptability against various CBRN threats.

The application discloses a fluorine-free waterproof and moisture-permeable electrostatic spinning nanofiber membrane and a preparation method thereof, relates to the technical field of polymer materials, and is prepared through coaxial electrostatic spinning of a spinning solution, wherein the spinning solution comprises polyurethane solution and organic polysiloxane solution in a mass ratio of 100:(5-7); the polyurethane solution comprises 5-30 parts of polyurethane and 70-95 parts of solvent A by weight; the organic polysiloxide solution comprises 1-30 parts of thermosetting organic polysiloxane, 0-10 parts of a crosslinking agent and 60-99 parts of solvent B by weight; and the thermosetting organic polysiloxane is hyperbranched polydimethylsiloxane with a vinyl group or an epoxy functional group at the end. The fluorine-free waterproof and moisture-permeable membrane of the polyurethane-silicone core-shell nanofiber with polyurethane as the core and crosslinked silicone resin as the shell is prepared through coaxial electrostatic spinning and in-situ drying and crosslinking, has the advantages of small fiber diameter, large specific surface area, small pore size and high porosity, and can effectively prolong the waterproof and durable effect.

The proposed invention, which combines cellulose acetate nanofibers with hyssop essential oil, offers a unique approach by integrating both advanced filtration technology and natural antiviral agents. This dual functionality sets it apart from existing patents, potentially providing enhanced protection against airborne pathogens while maintaining breathability and comfort.

The invention relates to the technical field of nano materials, in particular to a multifunctional electrospun nanofiber with bacteriostatic and anti-tumor effects and a preparation method and application of the multifunctional electrospun nanofiber. The result of the specific embodiment of the invention proves that the polyethylene oxide / gellan gum-carvacrol electrospun nanofiber can prolong the shelf life of strawberries by 3-4 days, and effectively alleviates the weight loss ratio, hardness, acidity, color and other quality deterioration of strawberry fruits. Microbial colony structure analysis shows that PEO / GG-CAR treatment can effectively reduce the flora richness and species number of strawberries, inhibit related putrefying bacteria such as proteobacteria, and promote the relative abundance of anaerobic microorganisms such as firmicobacteria and the like to be improved at the same time. Principal component analysis proves that the electrospun nanofiber membrane added with the CAR can effectively regulate microbial communities of strawberries, so that the preservative and fresh-keeping effects are achieved. Meanwhile, the electrospun nanofiber membrane also has the effect of inhibiting cancer cells.

The novel flexible electrodes disclosed herein utilize the low bending stiffness of electrospun nanofiber mats to achieve the material properties required for surgical implantation and sustained bidirectional communication with peripheral nerves without compromising electronic functionality. According to certain embodiments disclosed herein, implantable neural electrode probes are provided which comprise a polymeric substrate having proximal and distal ends, an electrode interface at the proximal end of the substrate; at least one neural contact at the distal end of the substrate; and electrically conductive traces formed on the fibrous substrate providing electrical communication between the at least one neural contact and the electrode interface, wherein the substrate comprises a nonwoven mass of polymeric nanofibers.

This invention discloses a method for removing nitrates from wastewater generated during drill-and-blast tunnel construction, comprising the following steps: 1. Preparation of electrospun nanofibers: First, DMF is added to a container, and submicron-sized iron powder and submicron-sized calcium-based montmorillonite are added sequentially to the DMF solution and ultrasonically dispersed. Then, the mixture is stirred to ensure uniform dispersion of the iron powder and calcium-based montmorillonite. PAN powder is weighed and added to the above solution, and stirred until the PAN is completely dissolved into a viscous liquid. The resulting solution is then placed in an electrospinning machine for electrospinning to prepare PAN nanofibers. 2. Removal of nitrates from the drill-and-blast tunnel construction wastewater: The prepared PAN nanofibers are completely immersed in the drill-and-blast tunnel construction wastewater. After immersion for a period of time, the PAN nanofibers are removed. This invention can efficiently and cost-effectively remove nitrates present in wastewater generated during drill-and-blast tunnel construction.

The invention discloses a high-performance nano electrostatic spinning melt-blown hydrophilic material for leukocyte filtration and a preparation method thereof, and relates to the technical field of blood treatment.The high-performance nano electrostatic spinning melt-blown hydrophilic material is characterized in that a positive electric melt-blown non-woven PBT material with high-density charges on the electret surface is adopted as a receiving base material of electrostatic spinning nano-fibers; the electrostatic spinning nanofibers are more uniformly and finely arranged on the melt-blown base cloth, and high-deacetylation-degree chitosan and betaine are copolymerized and grafted to the electrostatic spinning nanofibers by using a grafting method. The melt-blown PBT with high-density charges on the electret rear surface is used as a receiving medium to receive the electrostatic spinning nano composite fiber membrane, electrostatic spinning nano fibers are more uniformly and finely arranged on the melt-blown base cloth, the leukocyte removal rate can be more effectively increased and the filtering resistance can be more effectively reduced by utilizing the gradient structure design, and the leukocyte filtering effect is improved. High-deacetylation-degree chitosan and betaine are subjected to copolymerization grafting, so that the hydrophilicity and biocompatibility are improved, and the hydrophilic durability of the material is enhanced.

A method for detecting aflatoxin (AFB1) by using an electro-spun nano-fibre membrane loaded with NH2-MIL-53(Al) comprises; dropwise adding a sample solution to be detected to the loaded membrane; incu

A low loss flexible copper clad laminate (FCCL) for millimeter wave transmission with a dielectric layer comprising an electrospun nanofiber network of cyclized polyacrylonitrile, formed between conducting copper layers. The cyclized polyacrylonitrile has improved thermal stability over its uncyclized form while maintaining a higher porosity, which further enables the infusion of a second resin of low dielectric constant and low dielectric loss to increase compatibility between the conducting copper layers and nanofibers, and the compatibility between nanofibers, which further enhances the dielectric properties and structural integrity of the FCCL. The FCCL, apart from its low dielectric constant, has performances comparable with existing ultra-low loss materials but with lower costs, and can be utilized as a passive RF component in high-frequency transmission devices including flexible antennas and transmission lines, decreasing the transmission loss due to Joule heating and signal lagging, specifically suited for various high frequency signal transmission applications.

The present invention discloses a Ni-VC single-atom alloy electrocatalytic CO2 reduction material and a preparation method thereof, belonging to the technical field of composite material preparation. In the present invention, a nanofiber membrane containing nickel salt and vanadium salt is prepared by electrospinning, and then a Ni-VC / CNFs electrocatalytic material is prepared by pre-oxidation and high-temperature carbonization methods. The present invention prepares a Ni-VC single-atom alloy structure, and the electrospun nanofibers provide a nanoreactor for the formation of the Ni-VC single-atom alloy structure. VC is beneficial to the distribution orientation of Ni atoms, so that nickel is distributed on the surface of VC nanoparticles in an atomic state. This Ni-VC nanoalloy structure is conducive to optimizing the electronic structure of Ni atoms and improving the utilization efficiency of Ni atoms, effectively promoting its catalytic activity and selectivity in the electrocatalytic CO2 reduction reaction. In a wide voltage range (-0.78 to -1.18 V vs. RHE), the Faraday efficiency of its CO product can approach 100%.

The present invention relates to the technical field of nanofiber porous membranes, and particularly to an electrospun nanofiber porous membrane for protective clothing. The electrospun nanofiber porous membrane for protective clothing has raw materials in parts by mass including: 5-15 parts of polyvinylidene fluoride, 1-2 parts of zirconium chloride, 5-15 parts of titanium dioxide aerogel, 0.5-1.5 parts of 2-aminoterephthalic acid, 1-3 parts of glacial acetic acid, 1-5 parts of collagen, and 1-2 parts of carbon nanotubes. The titanium dioxide aerogel is prepared by the following steps: adding tetrabutyl titanate and graphene oxide into ethanol, stirring evenly, adjusting the pH value of the system to 3-4, stirring for 10-20 min, standing at 60-70 °C for 1-2 h, filtering, washing, drying, pulverizing, mixing with carboxyl-terminated polyamidoamine, adding into water for ultrasonic treatment, freezing, vacuum drying, and pulverizing. The structure of the present invention has excellent stability, good barrier property, high puncture resistance strength, and excellent moisture permeability.

A water purification storage apparatus is disclosed. The apparatus includes a bag with a handle and a body made from an electrospun nanofibre material. The body has a length, a width, and a height in an unfilled condition. The apparatus further includes a fill cap.

A non-woven filter media is provided that comprises a first layer including a blend of acrylic fibers and polypropylene, PP, fibers, a second layer, and a third layer arranged between the first layer and the second layer. The third layer comprises electrospun nanofibers.

A solid-state supercapacitor [100] is composed of a solid-state electrolyte [106] made of an electrospun nanofiber sheet impregnated with a salt; and a symmetric pair of electrode sheets [102, 104]. The solid-state electrolyte [106] is sandwiched between and in contact with the symmetric pair of electrode sheets [102, 104] such that the solid-state electrolyte separates the electrode sheets from each other. Preferably, each of the symmetric pair of electrode sheets [102, 104] is composed of commercial activated carbon on a graphite substrate, and the salt is preferably a salt of Li, Cs or Rb, such as LiCl.

The application discloses an antioxidant electrostatic spinning mask cloth and a preparation method thereof, and belongs to the technical field of electrostatic spinning nanofiber membrane materials. The method comprises the following steps: (1) washing cuttle ink sacs, collecting cuttle ink, adding deionized water, mixing and stirring for 4-8 hours, centrifugally collecting melanin precipitates, and then freezing and drying after washing to obtain cuttle melanin particles, wherein the average particle size of the cuttle melanin particles is 100-200 nm; (2) dissolving collagen peptide, the cuttle melanin particles prepared in step (1) and polyvinyl alcohol in an acetic acid solution, ultrasonically homogenizing to obtain a spinning liquid, and then performing electrostatic spinning on the spinning liquid, and finally vacuum drying to obtain the antioxidant electrostatic spinning mask cloth. The method is simple in process, and the prepared product, the mask cloth, is excellent in mechanical properties, and good in moisturizing and antioxidant effects.

The invention relates to the field of abrasive tools, in particular to multifunctional composite abrasive paper and a composite forming process thereof. The multifunctional composite abrasive paper comprises a base material layer, an abrasive material layer, a functional coating and a dustproof layer which are sequentially compounded, the base material layer is a polyester fiber cloth or aramid fiber non-woven fabric base material subjected to plasma treatment and silane coupling agent treatment, and the abrasive material layer is formed through an electrostatic sand planting process. The functional coating comprises a cleaning agent, a polishing agent and an anti-rust agent, and the dustproof layer is an electrostatic spinning nanofiber membrane; through gradient abrasive material design, microcapsule step-by-step control and low-temperature curing processes, the technical effects of integrating multiple functions of abrasive paper self-cleaning, rust prevention and polishing, reducing the replacement frequency and improving the grinding efficiency are achieved.

The invention discloses an electrospinning nanofiber reinforced proton exchange membrane and a preparation method and application thereof.The preparation method of the electrospinning nanofiber reinforced proton exchange membrane comprises the steps that a membrane casting solution is subjected to membrane casting and drying, an electrospinning nanofiber reinforced proton exchange membrane precursor is obtained, aftertreatment is conducted, and the electrospinning nanofiber reinforced proton exchange membrane is obtained. The membrane casting solution comprises cross-linked reinforced nanofibers and sulfonated polyimide; the method for obtaining the cross-linked reinforced nanofibers comprises the following steps: soaking reinforced nanofibers in a cross-linking agent at room temperature to obtain the cross-linked reinforced nanofibers; the method for obtaining the reinforced nanofiber comprises the step of performing electrostatic spinning on an electrostatic spinning solution to obtain the reinforced nanofiber. The electrospun nanofiber reinforced proton exchange membrane has proton conductivity, water absorption, hydrolytic stability and mechanical properties.

The present application relates to the technical field of battery separators, and more specifically to a highly heat-resistant self-repairing separator, and its preparation method and application, wherein the separator comprises coaxial electrospun nanofibers of a core-shell structure; the nanofibers form a porous network structure; the nanofibers comprise a first nanofiber and a second nanofiber, the first nanofiber comprising a first shell layer and a first core layer, the first shell layer being coated on the outside of the first core layer; the second nanofiber comprising a second shell layer and a second core layer, the second shell layer being coated on the outside of the second core layer. Since the separator is a porous network structure formed by two coaxial electrospun nanofibers, the separator has advantages such as high porosity, unique pore structure, and large specific surface area, which can significantly improve the electrolyte absorption rate and retention rate of the separator, and can improve the ionic conductivity and electrochemical performance of the separator to meet the use requirements of energy storage cells.

The utility model relates to the technical field of nanofiber membrane production, and particularly discloses a uniform dispersion mechanism for electrospinning nanofiber membrane production, which comprises a bottom plate and a dispersion unit, the dispersion unit comprises a storage tank, a feeding hopper, a first motor, a rotating roller, a plurality of stirring rods, a moving plate, a transfer tank, a conveying pipe, a water pump, a plurality of groups of spraying components and a moving component, the rotating roller is fixedly connected with the output end of the first motor, the multiple stirring rods are fixedly connected with the rotating roller, the moving assembly is arranged on the upper surface of the bottom plate, the moving plate is in threaded fit with the moving assembly, the transfer tank is fixedly connected with the moving plate, one end of the conveying pipe is fixedly connected with the storage tank, and the other end of the conveying pipe is fixedly connected with the transfer tank. The water pump is arranged at one end of the conveying pipe, the multiple sets of spraying assemblies are all arranged on the outer side of the transfer tank, through the arrangement, the concentration of polymer solutions sprayed out of the nozzles is consistent, and therefore fibers are evenly dispersed.

There is provided a hybrid nanofibrous mat comprising electrospun nanofibers formed by electrospinning of a polymer mix and porous silica capsules dispersed throughout the electrospun nanofibers during the electrospinning, the porous silica capsules having a hydrophobic liquid core containing an active. There is also provided a method of producing a hybrid nanofibrous mat comprising providing porous silica capsules having a hydrophobic liquid core containing an active, forming an electrospinning solution comprising the porous silica capsules and an electrospinning polymer mix, homogenising the electrospinning solution to fully disperse the porous silica capsules, and electrospinning the electrospinning solution to form the hybrid nanofibrous mat.