70 results about "Electrospun membranes" patented technology

The present invention discloses a quasi-solid dye sensitized flexible solar cell battery and a preparation method of the battery. A layer of TiO2 nanometer fiber film is attached as optical anode to a metal wire mesh coated with TiO2 nanometer particles, a sort of organic dye is used as sensitizer, polymer gel electrolyte is filled, a stainless steel plate coated with conductive polymer is used as the counter electrode, a non-conductive polyester film with good light transmittance performance is used as an encapsulation film to encapsulate the assembly, to obtain a quasi-solid flexible solar battery. The battery provided in the present invention has good stability and low cost, and is free of electrolyte leakage or encapsulation difficulty, etc., and can be easily stored, transported, installed, and used.

An electrospun nanofibrous membrane being sheet like and being formed by comprising multiple glucose oxidase/potassium hexacyanoferrate (III) modified electrospun nanofibers, wherein the glucose oxidase/potassium hexacyanoferrate (III) modified electrospun nanofibers are PVA electrospun nanofibers containing glucose oxidase and potassium hexacyanoferrate (III) homogeneously dispersed therein; and the glucose oxidase/potassium hexacyanoferrate (III) modified electrospun nanofibers are PVA electrospun nanofibers and are cross-linked by glutaraldehyde vapor with ultrasonic energy assistance. In the present invention, graphene modified PVA/GOx electrospun membranes were prepared to examine the immobilization mechanism between graphene and GOx. The electrochemical measurement results show that the sensitivities increased with increasing graphene concentrations up to 20 ppm. The highest sensitivity recorded 38.7 μA/mM was for a PVA/GOx membrane with 20 ppm graphene representing a 109% increase over a membrane made without graphene.

The invention relates to a tissue engineering vessel and a preparation method and an application thereof. The tissue engineering vessel uses a tubular gelatin/polycaprolactone electricity texture membrane as a support, and smooth muscle cells are evenly distributed in the support. The preparation method includes: a) spreading disinfected gelatin/polycaprolactone materials in a culture dish; b) collecting umbilical artery smooth muscle cells, evenly inoculating the umbilical artery smooth muscle cells on the surface of the gelatin/polycaprolactone electricity texture membrane to culture over the night, and forming a cell material composite electricity texture membrane; and c) twisting the cell material composite electricity texture membrane on a polyvinyl chloride (PVC) tube for culturing, and finally forming the tubular tissue engineering vessel. Cells of the tissue engineering vessel prepared by the method are evenly distributed, simultaneously the tissue engineering vessel has the advantages of being good in elasticity, moderate in hardness and compact in tissue structure, having smooth inner walls and abundant collagenous fibers, and being clear in self tissue boundary and the like. The characteristics of the tissue engineering vessel are close to that of living body vessels.

The present invention discloses a homogeneous solution containing responsive fluorescent polysaccharide derivatives, a preparation method and a use thereof. The contained responsive fluorescent polysaccharide derivatives can uniformly disperse responsive fluorescent groups in a polysaccharide matrix and can overcome an aggregation-induced quenching effect of conventional conjugated fluorescent molecules; and obtained solid fluorescent materials can also respond to changes or stimuli of external environment (such as light, metal ions, external forces, temperatures, pH values, etc.). The contained responsive fluorescent polysaccharide derivatives can also impart the materials with processing properties and mechanical properties that organic small molecules do not possess, and the prepared fluorescent material main body is still mainly prepared from polysaccharide polymer materials, can still maintain excellent processing properties of the original polysaccharide polymer materials while playing an excellent fluorescent characteristics, can be conveniently processed into various forms of the materials such as fluorescent coating layers, fluorescent electrospinning membranes, fluorescent fibers, fluorescent micelles and fluorescent ink, and thus has very important practical value.

The invention discloses a preparation method for micro and nano PET fiber with large pore volumes. Polyethylene terephthalate (PET) and a porous material with large specific surface area are used as starting material. Trifluoroacetic acid and dichloromethane are used as mixed solvent to prepare a mixed solution with certain concentration. Complex fiber with a micro and nano structure is made by electrostatic spinning. The complex fiber is etched in a certain aqueous alkali, then washed repeatedly with distilled water and dried. Thus, the micro and nano PET fiber with large pore volumes is obtained. Due to partially exposed porous carbon fiber at the surface of the fiber and high porosity of electrostatic spinning, the prepared electrospinning has large pore volumes. The micro and nano PET fiber with large pore volumes will have many applications in the fields of catalysis and adsorption and can be used as adsorbent material or catalyst carrier. The preparation condition of the method is mild and the method is easy and feasible.

The invention discloses a preparation method of an electrospinning fiber scaffold material. The method comprises the following steps: by using a degradable polymer material electrospinning film as a substrate material, crushing prepared electrospinning fibers through a high-speed disperser, performing crosslinking through a biological crosslinking agent, and performing lyophilization to prepare the in-vivo scaffold material having appropriate porosity. The method for expanding an application of the electrospinning nanofiber material provided by the invention realizes the effects of increasinga three-dimensional pore size, adjusting cell adhesion and promoting expression.

The invention discloses an electrostatic spinning fiber silk fibroin mask. The electrostatic spinning fiber silk fibroin mask comprises a woven base mask, an electrostatic spinning mask compounded onone side of the woven base mask, and a spunlace non-woven fabric compounded on the other side of the woven base mask; the woven base mask is formed by weaving a fine denier polypropylene filament by adopting a plain weave structure; the electrostatic spinning mask is a non-woven mask made of silk fibroin through an electrostatic spinning process; and the spunlace non-woven fabric is adhered to thewoven base mask through hot air. The silk fibroin electrostatic spinning mask is used as a functional layer to replace a traditional silk non-woven fabric mask, and has the advantages of good skin friendliness, biodegradability, soft and smooth touch feeling, good air permeability, good moisture absorption and moisture releasing performance and the like, is low in production cost, good in dimensional stability and not prone to tearing, is more beneficial to directly acting on the skin, can be absorbed by human skin, and has the skin care and whitening effect.

The invention discloses a bionic artificial periosteum with a "sandwich" structure and a preparation method of the bionic artificial periosteum. The bionic artificial periosteum comprises a fiber layer electrospinning membrane and a germinal layer electrospinning membrane, and at least one of the following cell sheet layers is laid between the fiber layer electrospinning membrane and the germinal layer electrospinning membrane to form the sandwich structure: an osteoblast precursor cell sheet layer, a mesenchymal stem cell sheet layer and a vascular endothelial cell sheet layer; at least one cell sheet layer is arranged; the fiber layer electrospinning membrane is a spinning membrane made of a degradable high polymer material and a natural high polymer material; the germinal layer electrospinning membrane is a compound of a natural high polymer material or natural high polymer material and a degradable high polymer material. According to the bionic artificial periosteum, the nanofiber membrane is compounded with the cell sheet layers, so that the strength of the cell sheet layers can be improved, the requirements of surgical operations such as suturing can be met, the cells can be fixed between the nanofiber membranes by utilizing the cell shielding effect of the nanofiber membrane, so that the cells are effectively prevented from diffusion after being implanted into a body, and the cell utilization rate is effectively improved.

The invention belongs to the technical field of energy materials, and relates to a preparation method and application of an electrospun carbon nanofiber/reduced graphene oxide/polyaniline/basic nickel carbonate composite electrode material. The preparation method comprises the following steps of firstly, preparing a polyacrylonitrile electrospun membrane through an electrostatic spinning method, and carrying out pre-oxidation, graphene oxide solution soaking, carbonization and other steps to obtain electrospun carbon nanofiber/reduced graphene oxide; then successfully coating polyaniline on the basis of the previous step through an in-situ polymerization method; and finally regulating and controlling the hydrothermal time and the concentration through a hydrothermal reaction to obtain the electrospun carbon nanofiber/reduced graphene oxide/polyaniline/basic nickel carbonate composite electrode material. The composite electrode material prepared by the method is not reported in literature, and the method is simple and convenient and easy to operate; and the obtained material has the advantages of stable morphology, high specific surface area, high conductivity, more active sites, excellent electrochemical energy storage performance, and good mechanical stability and electrochemical cycling stability.

According to a waterproof breathable machine-washable down-proof composite fabric and a preparation method thereof provided by one or more embodiments of the invention, a micro-nano electrospinning fiber membrane with high porosity and low density is compounded with the fabric, and the micro-nano electrospinning membrane is compounded with a cotton fabric, so that the light down-proof fabric is prepared; meanwhile, the fabric has waterproof, breathable and machine-washable functional properties and fills the blank in the market ; and the problem that a traditional down quilt cannot be used for machine washing is solved, and the gram weight of the prepared fabric does not exceed 80 g/m < 2 > and is lower than that of a universal down-proof fabric in the market.

A bilayer electrospun membranes for treating hydraulic fracking wastewater via membrane distillation, and more particularly to bilayer electrospun membranes having an omniphobic layer to prevent low-surface tension solution wicking and an oleophobic antifouling surface to prevent foulant depositing on the membrane. Nanoparticles are decorated on the omniphobic surface through electrochemical interaction, which is coated with a fluorine monomer on the nanoparticles. A zwitterionic co-polymer is grafted using self-assembly between hydroxy groups on the antifouling surface generated by alkaline treatment and anchor segment epoxy groups on zwitterionic co-polymer.

The invention discloses a composite electrospinning membrane for promoting tendon-bone healing as well as a preparation method and application of the composite electrospinning membrane. A matrix of the composite electrospinning membrane is a degradable high polymer material, and calcium phosphate ceramic particles are uniformly dispersed or dispersed in the matrix in a concentration gradient manner. The composite electrospinning membrane can select a proper material system and load concentration according to specific conditions of ligament grafts and ligament repair and reconstruction operations, meets different requirements of tendon-bone healing application in ligament repair and reconstruction, can be trimmed according to the sizes of articular cavities and bone tunnels of patients, coats the surfaces of autologous or artificial ligament grafts, constructs ligament grafts with different section characteristics of bone tunnels and articular cavities, and achieves personalized precise treatment.

The invention belongs to the technical field of medicines of medical dressings, and particularly relates to a fiber dressing with a damaged skin repairing function and a preparation method thereof. The preparation method comprises the following steps of (1) weighing polyvinyl alcohol, dissolving in 30% acetic acid, uniformly stirring to obtain a 2wt% solution, adding equivalent chitosan powder, and uniformly mixing under a magnetic stirrer to complete the preparation of a basic electrospinning solution; (2) adding ursolic acid, and uniformly stirring; and (3) carrying out electrostatic spinning by taking tin foil paper as a base material, and standing and drying an electrospun film after spinning to obtain the fiber dressing. According to the method, the concept of a traditional external application material is broken through, and the traditional Chinese medicines with low cost and high treatment effect are added into the external application material, so that the material has biological activity and plays anti-inflammatory, anti-oxidation and repair-promoting roles in the external application process.

The invention discloses a phosphorus high-throughput adsorption nano-fiber membrane and a preparation method thereof, and belongs to the technical field of sewage treatment. The preparation method includes the following steps that PVA and PEI are added into deionized water according to the mass ratio of 3 to1, and a PVA/PEI solution is obtained after the PVA and the PEI are completely dissolved at60-90 DEG C; then La(NO3)3.6H2O is added into the PVA/PEI solution to obtain an electrostatic spinning solution, the mass ratio of the total mass of the PVA and the PEI to the mass of La(NO3)3.6H2O in the electrostatic spinning solution is (1 to 10) to (1 to 1), and the total content of the PVA and the PEI in the electrostatic spinning solution is 8 to 12 wt.%; electrostatic spinning is conductedto obtain an electrospinning membrane; and finally, the obtained electrospinning membrane is placed in a 60 DEG C vacuum drying oven, 0.1-5 wt.% of glutaraldehyde is added for fumigation, then the electrospinning membrane is taken out to be put into lye to be soaked, washed by the deionized water to being neutral and then dried, and thus a target product is obtained. The nano-fiber membrane is prepared through an all-water formula, the preparation steps are simple, the prepared phosphorus high-throughput adsorption nano-fiber membrane can efficiently adsorb phosphorus in a water body with thelow concentration, the large water volume and the high flow rate, and the phosphorus removal rate reaches 100%.

The invention provides a method and a device for photocatalytic degradation of organic pollutants in wastewater. The invention belongs to the technical field of organic pollutant treatment. The methodcomprises the steps: firstly, nitrogen element enters titanium dioxide crystal lattices in a manner of replacing nitrogen or interstitial nitrogen; the N-doped titanium dioxide sol is obtained; zincsource precursor sol is obtained in an electrostatic spinning mode, titanium dioxide grows on a spool of a nano zinc oxide electrospun film in order through a hydrothermal method, a zinc oxide/titanium dioxide composite film catalyst is obtained, the zinc oxide/titanium dioxide composite film catalyst and hydrogen peroxide have a synergistic effect, and the zinc oxide/titanium dioxide composite film catalyst has efficient catalytic capacity on various organic pollutants. The method is mild in reaction condition and high in degradation efficiency, and the degradation rate can reach 95% or aboveafter reaction is conducted for 2 h. According to the device, through a spirally coiled reaction tank body and a photocatalytic light source vertically inserted into the middle part of the reaction tank body, the problem that a photocatalyst is difficult to separate is effectively solved, and the service life of a catalyst film layer can be prolonged.

The invention provides a preparation method of an antibacterial nanofiber membrane, and relates to the field of food preservation. The preparation method of the antibacterial nanofiber membrane is characterized by comprising the following step of preparing an electrospinning membrane blending solution containing 100-140 g/L of gelatin, 10-30 g/L of zein and 50-1000 mg/L of perillaldehyde by adopting an electrospinning technology to obtain the antibacterial nanofiber membrane. The preparation method of the antibacterial nanofiber membrane is simple and low in cost, and the prepared nanofiber membrane has excellent safety, antibacterial activity, stability and ductility and relatively high tensile strength.

The invention relates to a novel fresh-keeping card and a preparation method thereof, and belongs to the technical field of food fresh keeping. The preparation method comprises the following steps: taking a chlorogenic acid extract and limonene as raw materials, preparing a fresh-keeping solution, adding cellulose powder, performing uniform stirring to prepare a viscous cellulose spinning solution, performing an electrostatic spinning to prepare a cellulose electrospun film, and performing drying to obtain a fresh-keeping active base material layer; mixing PVA and potato starch, dissolving anobtained mixture in water, adding glycerol, and performing stirring and gelatinization under a water bath condition to prepare an electrospinning solution; and printing the electrospinning solution ona front surface and a back surface of the fresh-keeping active base material layer for film preparing, and uncovering films to obtain the fresh-keeping card wrapped by the PVA/potato starch compositefilms. The fresh-keeping card has a good barrier property, avoids a rapid volatilization of a fresh-keeping agent, prolongs fresh-keeping time and avoids waste.

The invention relates to a PGS/SF electrospun artificial blood vessel and a preparation method thereof. The invention discloses a preparation method of the PGS/SF electrospun artificial blood vessel.The method comprises the following steps: 1, dissolving a PGS prepolymer and SF into an organic solvent to obtain a spinning solution; carrying out electrostatic spinning on the spinning solution; receiving micro-nano fibers by adopting a cylindrical receiving device rotating around the axis of the receiving device, winding the micro-nano fibers outside the receiving device to form a tubular PGS/SF electrospun membrane; and drying and solidifying the tubular PGS/SF electrospun membrane after completely spinning to obtain a PGS/SF electrospun artificial blood vessel. According to the PGS/SF electrospun artificial blood vessel, the spinnability and fiber forming property of PGS are improved through the SF, the PGS/SF electrospun artificial blood vessel is successfully obtained, the caliber of the electrospun artificial blood vessel is smaller than 6 mm, and the electrospun artificial blood vessel has the excellent elasticity of the PGS and the excellent biological and mechanical properties of the SF.