774 results about "Electro spinning" patented technology

A vascular prosthesis comprising a first layer having a predetermined first porosity and a second layer having a predetermined second porosity, wherein the first layer and the second layer are each made of first and second electrospun polymer fibers.

A spinneret format, an electric-field reversal format and a process for post-treatment of membranes formed from electro-spinning or electro-blowing are provided, including a cleaning method and apparatus for electro-blowing or blowing-assisted electro-spinning technology.

An antibacterial nano-class fibre material contains superfine high-molecular fibres (60-98 wt.%) and antibacterial agent (2-40 wt.%), and is prepared through dispersing or dissolving one or more high-molecular material in solvent to become transparent solution or mixture, dispersing the superfine particle of antibacterial agent (less than 20 microns) in said solution, and electric spinning. It can be used as protecting material, disinfecting filter material and tissue covering material for repairing tissue or promoting healing of tissue.

The invention discloses an efficiency oil and water separation composition fiber film and a preparation method thereof, and belongs to the field of functional nanometer fiber materials. Hydrophobic polymers such as polyurethane, polystyrene and polymethyl methacrylate or polycaprolactone are used as the main raw materials of the fiber film, the main raw materials are dissolved in an organic solvent to form a polymer solution, hydrophobic nanometer particles are added into the polymer solution in the preparation process, after the mixture is evenly mixed, electro-spinning is conducted on the mixed solution by means of the electrostatic spinning method, and then a fiber film material which is formed by micro-nanometer composite structures and is in the shape of non-woven fabric is obtained. The electro-spun fiber film of the micro-nanometer structure has super-hydrophobic/super-oleophylic property in the air and excellent oil adsorption performance, and the contact angle to oil is nearly zero. The efficient oil and water separation composite fiber film is simple in preparation method, low in energy consumption, high in efficiency, high in oil and water separation speed, and capable of being widely used in the fields such as oily water efficient purification.

A porous nanozeolite material having a first dimension less than about 1 micron and a second dimension less than about 100 microns. The nanozeolite material comprises pores having an average diameter less than about 50 nm. A method of making microporous nanozeolites is provided. The method comprises the steps of providing an aqueous solution comprising at least one nanozeolite precursor material or zeolite particles, and electrospinning the aqueous solution onto a substrate to form an electrospun material. The electrospun material comprises microporous nanozeolites. A method of making mesoporous nanozeolites is also provided. The method comprises the step of providing an aqueous solution comprising a nanozeolite precursor material and at least one structure directing agent, and electrospinning the aqueous solution onto a substrate to form an electrospun mesoporous nanozeolite material. A gas sensor device is provided. The device comprises nanozeolite sensing material.

The invention discloses a blending electric spun nanometer fiber film biological compress and preparing method in medicinal biological compress technical domain, which is characterized by the following: choosing chitose or polyvinyl alcohol or water-soluble antibacterial drugs as main raw material; adopting electrostatic spinning method; producing nanometer fiber film. This product possesses the advantages of higher strength, good air perviousness and good biological compatibility.

The invention discloses a fuel cell ordered porous nano-fiber single electrode, a membrane electrode and a preparation method. Polymer nano-fibers are deposited on one side of a gaseous diffusion material through an electro-spinning technology; metal nanoparticles with catalytic activity are deposited on the surfaces of the polymer nano-fibers by using magnetron sputtering and vacuum evaporation methods, or catalyst slurry is directly sprayed to one side of a nano-fiber thin film to form a porous single electrode; then two single electrodes and a layer of proton exchange membrane are combined into a three-in-one membrane electrode. The fuel cell ordered porous nano-fiber single electrode, the membrane electrode and the preparation method have the beneficial effects that the conventional micro-porous layer is substituted by the nano-fiber layer with high porosity and high specific surface area, prepared by electro-spinning, so that the catalytic activity area is increased and the three-phase reaction interface and the mass transfer are facilitated, and an active metal catalytic layer formed by magnetron sputtering and vacuum evaporation has high adhesion, is uniform in coating and has controllable thickness, so that the using amount of the active metal catalyst is reduced and the utilization rate of the catalyst is also greatly increased.

A nanofibrous catalyst and method of manufacture. A precursor solution of a transition metal based material is formed into a plurality of interconnected nanofibers by electro-spinning the precursor solution with the nanofibers converted to a catalytically active material by a heat treatment. Selected subsequent treatments can enhance catalytic activity.

The invention provides a medical anti-sticking membrane and a preparation method thereof. The anti-sticking membrane comprises a nanometer frame and hydrosol attached thereon. The hydrosol is internally packed with one or several kinds of styptic medicament or/and anti-sticking medicament. The invention also provides a preparation method of the anti-sticking membrane, comprising the following steps of: preparing electro-spinning solution, styptic medicament and/or anti-sticking medicament-containing hydrosol solution and crosslinker solution; receiving static spinning with the crosslinker solution to obtain the nanometer frame; printing the styptic medicament and/or anti-sticking medicament-containing hydrosol solution onto the nanometer frame by an ink-jet printer, and solidifying the hydrosol solution to obtain the anti-sticking membrane. The anti-sticking membrane has good capability and biological compatibility, and nontoxicity as well as nonirritant, can be completely degraded and absorbed, is compounded with controllably released styptic medicament or/and anti-sticking medicament, has controllable degrading time and speed, and conquers defects of the prior art.

The various embodiments herein provide an electrospun fiber mat filter comprising a cigarette filter containing macrocycle for removing toxic compounds from a toxic material, wherein the toxic material comprises liquid, gas, and cigarette smoke and a method of synthesizing the same. The electrospun fiber mat cigarette filter comprises a biological, organic or synthetic macrocycle, plurality of additives, a solvent and an acceptable polymeric carrier. The biological macromolecules are engineered polyhemoglobin and/or chlorophyll. The biological, organic, or synthetic macrocycle are electrospun with the acceptable polymeric carrier in presence of an abruptly asymmetric electric field to form an electrospun fiber mat. The electrospun fiber mat is made up of networks of plurality of nanofibers.

The invention belongs to the technical field of composite materials and particularly provides a fibroin-silver-nanoparticle composite material and a preparation method thereof. The fibroin-silver-nanoparticle composite material comprises fiber (including electrospinning fiber), film, hydrogel and three dimensional porous materials. The preparation method comprises the following steps: after fibroin solution and silver nitrate solution are mixed, the precursor of silver is converted into silver-nanoparticles through in-situ reduction under the irradiation of sunlight or simulated sunlight, and then the material is formed and prepared; or fibroin is prepared into different forms of materials first, then the materials are soaked in silver nitrate water solution, and finally, the precursor of silver is converted into silver-nanoparticles through in-situ reduction under the irradiation of sunlight or simulated sunlight. According to the invention, fibroin is taken as material matrix and the reducing agents and stabilizing agents of silver-nanoparticles, and no other chemical agent is required to be added; and the preparation process is simple, energy-saving and environment-friendly, and the material has various forms.

The invention discloses a method for preparing grapheme/ ceramic nanocrystalline particle composite material with an electrospinning-hydrothemal method. The method comprises the following steps: firstly, preparing ceramic/ polymer composite fiber by electrospinning; then, dissolving the composite fiber into a solvent for dissolving polymers; dismembering the fiber into tiny ceramic nanocrystalline seeds while the polymers in the composite fiber are dissolved; then, adding graphene oxide; carrying out hydrothermal or solvothermal reaction; and after reaction ends, adding a reducing agent to reduce the graphene oxide into grapheme. The ceramic/ polymer composite fiber is weaved by the electrospinning, and the hydrolysis speed of the metallorganics of a ceramic material precursor is controlled by controlling the moisture, electrospinning flow rate and the like in the electrospinning environment. The electrospinning method and the hydrothemal method are both simple and easy to implement and can be used for industrially producing and preparing nanofiber materials. The combination of the electrospinning method and the hydrothemal method creates convenience for industrial production of materials.

The invention discloses a device for manufacturing an artificial blood vessel through combination of bio-printing and electro-spinning technologies. The device comprises a material release unit, a rotary receiving unit, a horizontal moving platform, a vertical moving platform, a high-voltage power supply and a control unit, wherein the rotary receiving unit is located below the material release unit and comprises a rotary motor and a receiving rod; the rotary motor can drive the receiving rod to conduct rotary operation. The device has the following benefits: during operation, when the material release unit uses a bio-printing nozzle, a first stepping motor controls an extrusion pump to extrude out a cell-containing hydrogel material in a storage tank, and the extrusion pump can realize setting and controlling of the material release speed and quantity by the control unit; the vertical moving platform controls relative displacement of the whole material release unit to the rotary receiving unit, and can conduct vertical up-and-down displacement (such as 0.1 mm, 0.5 mm, 5 mm and continuous displacement), the displacement can be adjusted according to the extrusion requirement, and the distance between the bio-printing nozzle and the rotary receiving unit is adjusted through the displacement; the bio-printing nozzle and electro-spinning nozzles can work simultaneously or alternately, which is adjusted by the control unit according to actual demands.

The invention relates to a preparation method of compound artificial blood vessel support by electrostatic textile and weave technology, which can be described as follows: 6% to 10% (g/ml) polymer spinning solution is prepared; under the control of electrostatic spinning parameter, the prepared solution is used to make nano fiber with electrostatic textile technology; the nano fiber is collected by a roller collecting device to be the inner layer of a tubular support; the fiber materials are woven into tubular form by making use of the textile equipment to be the outer layer of the tubular support; the electrostatically textile inner layer and the woven outer layer are compounded together with the method of hot shaping or coating; with the adoption of biocompatible implant technology, human endothelial cells are implanted on the inner layer of the support and human smooth muscle cells are implanted on the outer layer of the support; after cell culture, the blood support is completed. The preparation method of compound artificial blood vessel support through electrostatic textile and weave technology has the advantages of simplification and time-saving effect, fine growth activity of the prepared artificial blood vessel after being implanted into human body; besides, the smooth muscle can grow along and into the fiber, and adaptability adjustment can be made to the blood vessel according to the condition of the host, leaving less liability for embolization.

One aspect of the invention provides a three-dimensional scaffold including at least one layer of highly-aligned fibers. The at least one layer of highly-aligned fibers is curved in a direction substantially perpendicular to a general direction of the fibers. Another aspect of the invention provides a method for fabricating a three-dimensional scaffold. The method includes: electro spinning a plurality of fibers to produce at least one layer of highly-aligned fibers and forming the at least one layer of highly-aligned fibers into a three-dimensional scaffold without disturbing the alignment of the highly-aligned polymer fibers. A further aspect of the invention provides methods for using a three-dimensional scaffold to treat nerve or spinal cord injury.

Methods are provided according to aspects of the present invention for making starch fiber or particle compositions by wet-electrospinning or wet-electrospraying including providing a solution or dispersion of starch in an aqueous or non-aqueous solvent or dispersant, where the starch is present at a concentration above the critical entanglement concentration, with the proviso that the aqueous or non-aqueous solvent or dispersant does not consist only of water; heating the solution or dispersion of starch to a temperature above the crystallization temperature of the starch; electro spinning or electro spraying the heated solution or dispersion of starch to produce starch fibers or starch particles, respectively; and contacting the starch fibers or starch particles with a coagulation bath fluid.

The invention relates to a multi-fluid composite electrostatic spinning plant belonging to the electrostatic spinning plant field. A multi-fluid composite electric spinning nozzle is arranged on a base and comprises an outer nozzle and a plurality of inner nozzles embedded in the outer nozzle; wherein the inner nozzles and the outer nozzle are respectively connected with the positive high voltage or negative high voltage from one output end of the a high voltage supply through independent wires connecting with the nozzles; a fiber collector is arranged in front of the multi-fluid composite electric spinning nozzle and is connected the ground wire of the other end of the high voltage supply; the inner nozzles embedded in the outer nozzles are radically and evenly distributed; the inner nozzles and the outer nozzles are non-contact and the inner nozzles are non-contact neither. Spinning solution is injected from the inner nozzles and the outer nozzle respectively through a liquid pump at a continuous and controllable speed forming a composite fluid. Under the influence of the electric field produced by the high voltage supply, porous micro/ nanometer tubes or multiple components composite fiber with a plurality of inner channels after pulling and solidification are formed finally from the composite fluid.

The invention provides a sunlight full-spectrum responding Ag2O/TiO2/V2O5 nano hetero-structure photocatalyst and a preparation method thereof. The preparation method is characterized by comprising the following steps: mixing tetrabutyl titanate, polyvinylpyrrolidone, absolute ethanol, dimethyl acetamide and glacial acetic acid so as to obtain a solution A, mixing vanadium(IV) oxide acetylacetonate, polyvinylpyrrolidone and dimethyl acetamide so as to obtain a solution B, mixing the solution A and the solution B so as to obtain a polyvinylpyrrolidone/titanate/vanadium(IV) oxide acetylacetonate mixed solution, spinning the mixed solution by an electro-spinning method so as to obtain TiO2/V2O5 nano fibers, then soaking AgNO3 and the TiO2/V2O5 nano fibers in deionized water, injecting a NaOH solution into the deionized water, and drying so as to obtain the Ag2O/TiO2/V2O5 nano hetero-structure photocatalyst. The Ag2O/TiO2/V2O5 nano hetero-structure photocatalyst can well absorb lights in the ultraviolet zone, visible zone, and near infrared zone; at the same time, energy bands of the Ag2O, TiO2, and V2O5 are reasonably matched, thus the photo-produced electronic cavities can be effectively separated, so the Ag2O/TiO2/V2O5 nano hetero-structure photocatalyst has a very high sunlight catalytic activity.

The invention provides a nano artificial dura mater capable of being used as a medicine sustained-release system, having the structure which comprises at least two layers, i.e. a hydrophobic anti-blocking electro-spun layer which faces the cerebrum, and a hydrophilic nano cytoskeleton layer which backs on to the cerebrum; and cell factors and/or medicines are arranged in any layer of the artificial dura mater by way of blended spinning. The invention also provides a method for preparing the nano biomimic artificial dura mater. Compared with an artificial mater prepared by the single utilization of the electro-spinning technology, the artificial mater to which the medicines and the cell factors are added by blending technology can effectively prevent infection and faster promote the regeneration process of the artificial mater. The invention also provides a novel medicine loading and releasing mode for treating cerebral diseases, the loaded medicines can be directly and efficiently transferred into the cranial cavity along with the implantation of the dura mate and can be released according to requirements, and therefore the invention realizes favorable treatment effect and has broad application prospect.

A water vapour transport membrane comprises a nanofibrous layer disposed on a macroporous support layer, the nanofibrous layer coated with a water permeable polymer. A method for making a water vapour transport membrane comprises forming a nanofibrous layer on a macroporous support layer and applying a water permeable polymer to the nanofibrous layer. The water permeable polymer can be applied for so that the nanofibrous layer is substantially or partially filled with the water permeable polymer, or so that the coating forms a substantially continuous layer on one surface of the nanofibrous layer. In some embodiments of the method, the nanofibrous layer is formed by electro-spinning at least one polymer on at least one side of the porous support layer. In some embodiments, the support layer is formable and the method further comprises forming a three-dimensional structure from the water vapour transport membrane, for example, by compression molding, pleating or corrugating.

The invention discloses a preparation method of a force-sensitive stretchable electro-spinning patterning conductive nanofiber membrane. The preparation method comprises the following steps that (1) a high-molecular polymer and a conductive polymer are fully mixed and dissolved in an organic solvent, and therefore a spinning precursor solution is formed; (2) a patterning collection template is used for electrostatic spinning to collect electrospunpolymer nanofibers, a patterning conductive nanofiber membrane in a non-woven mode is formed on the collection template, and is taken from the collection template, and therefore the force-sensitive stretchable electro-spinning patterning conductive nanofiber membrane can be obtained, wherein the collection template is a metal template, a semiconductor template or an insulating plastic template, and a hollow or protruding pattern structure is arranged on the collection template. The nanofiber membrane prepared through the preparation method can achieve the purposes of high conductivity, good force-sensitive performance and good stability, and can bear large-scale two-dimensional stretching strain. The preparation method is simple and low in cost, and has the good application prospect.