33results about "Electro-spinning" patented technology

The application discloses a preparation method of a biomass-based air purification membrane and belongs to the technical field of air purification membrane preparation. The method comprises the following steps: step one, a spinnable polymer material is placed in a solvent and heated and stirred until the polymer material is dissolved, and then a solution of biomass material is added after cooling, and the solution is uniformly mixed to obtain a spinning precursor solution; step two, a drum is used as a receiving device, and electrostatic air-jet spinning is performed on the spinning precursor solution to obtain an electrostatic air-jet spun fiber membrane; and step three, an array template method is used to patternize and press the electrostatic air-jet spun fiber membrane by using a flat vulcanizing machine, so that the electrostatic air-jet spun fiber membrane has a periodic micro-pattern structure, and the air purification membrane is obtained. The application prepares an air purification membrane with a blocking effect on ultraviolet rays, and the air purification membrane has high filtration efficiency and small pressure drop, and has a good application prospect in the field of air purification.

One embodiment of the present invention relates to a functional fiber including functional particles and a method for manufacturing same, wherein the functional fiber includes a porous polymer fiber and functional particles distributed at least in the porous polymer fiber, the functional particles are contained in an amount of 0.05 wt% to 5 wt% on the basis of the total weight of the functional fiber, and the functional particles are exposed to the outside from the surface of the porous polymer fiber. The functional fiber has pores formed on the surface thereof so as to position antibacterial and antiviral materials present inside the fiber toward the surface of the fiber, resulting in improved antibacterial and antiviral efficiency, and the method for manufacturing the functional fiber can easily adjust porosity on the surface of the functional fiber through humidity control.

This invention provides a method for preparing a composite nanofiber electron transport layer and a perovskite solar cell, belonging to the field of perovskite solar cell technology. It solves the problem of numerous defects existing on the surface and inside the electron transport layer of current perovskite solar cells. The method includes the following steps: dissolving PAN and SnCl2 2H2O in DMF to obtain a mixture, stirring the mixture in air for a period of time to form a precursor solution; placing the precursor solution into the syringe of an electrospinning apparatus, resulting in hemispherical droplets appearing at the tip of the syringe; using an electrospinning apparatus to obtain a SnCl2 2H2O:PAN composite fiber film with a diameter of nanometers on a prepared conductive substrate; calcining the prepared SnCl2 2H2O:PAN composite fiber film in air at 200°C to obtain pure SnO2:PAN composite nanofibers; and spin-coating a layer of SnO2 thin film onto both the upper and lower interfaces of the prepared SnO2:PAN composite nanofibers. This invention is applicable to perovskite solar cells.

The present invention relates to elastomer materials, and more precisely to an elastomer material blend of at least one polyisoprene polymer and at least one natural or synthetic polymer. The invention also relates to the method for preparing the blend and to the processing thereof by means of an electro-hydrodynamic process or an aero-hydrodynamic process, or to the combination of both processes.

The present disclosure provides a structural protein comprising an amino acid sequence unit comprising a motif (VPGVG)n, wherein n is 2 or more, and an amino acid sequence selected from SEQ ID NO:1–10. The present disclosure also provides a polynucleotide, an expression vector and a host cell, as well as a method for producing the structural protein. The present disclosure also provides a medical product, an electrospun filament comprising the structural protein, a protein-based micro-robot, photonic crystals, metamaterial and thermoresponsive glass comprising one or more of the structural proteins. The present disclosure also provides a method for preparing a product. The present disclosure also provides use of one or more of the structural proteins for preparing a product.

The present invention relates to a process for producing a polymeric material comprising: (i) at least one organic solvent; (ii) (A) at least one organopolysiloxane compound containing a group having an aliphatic carbon-carbon multiple bond; (B) at least one organopolysiloxane compound having a Si-bonded hydrogen atom, or instead of or in addition to (A) and (B), (C) at least one organopolysiloxane compound containing a Si-C bonded group having a group with an aliphatic carbon-carbon multiple bond and a Si-bonded hydrogen atom; (However, all of the above (A), (B) and (C) are performed at 25°C for 0.1 seconds.) -1 The viscosity measured at a shear rate of 800,000 mPa·s or less. (D) at least one hydrosilylation catalyst; (E) no filler or at least one silicone-containing filler; an addition-crosslinking silicone elastomer comprising (iii) 25°C, 0.1 s -1 at least one polysiloxane other than (A), (B), (C), and (E), having a viscosity of more than 5,000,000 mPa·s measured at a shear rate of Electrospinning solution comprising:

Microfibers and nanofibers containing quaternary ammonium polymers and / or interpenetrating polymer networks are provided. For example, a microfiber or nanofiber including a blend, composite, or interpenetrating polymer network is provided. The blend, composite or interpenetrating polymer network can include (i) a polyethyleneimine intermediate, in which the polyethyleneimine intermediate includes a reaction product of reagents including a polyethyleneimine and one or more alkylating agents; at least one of the one or more alkylating agents introduces hydroxyl group functionality or thiol group functionality on the polyethyleneimine intermediate; and nitrogen atoms present in the polyethyleneimine intermediate that are partially or completely quaternized by the one or more alkylating agents; and (ii) a hydroxy-functionalized oligomer, polymer, or copolymer including pendant and / or terminal hydroxy group(s).

A melt electrowritten soft tissue scaffold, comprising: a first region having one or more sets of fibres and a second region having one or more sets of fibres; and an interface region joining the first region and the second region, the interface region being electrowritten along with the first and second regions in a continuous printing path, such that fibres in the interface region each join between a respective pair of fibres in the first and second regions.

The application relates to a preparation method of a BTO@PDMS fiber film, which comprises the following steps: in an ethanol solution, surface-modifying barium titanate nanoparticles with a vinyl silane coupling agent, ultrasonic dispersion of the barium titanate nanoparticles and polydimethylsiloxane prepolymer in n-hexane, reaction in the presence of tetrahydrofuran and a polydimethylsiloxane curing agent to obtain a BTO@PDMS core material solution; coaxial electrospinning of the BTO@PDMS core material solution and a PVP shell layer solution, aluminum foil paper collection, and PVP / BTO@PDMS fiber film obtaining; after stripping the PVP / BTO@PDMS fiber film from the aluminum foil paper, high-temperature crosslinking and curing and anhydrous ethanol washing are sequentially performed to obtain the BTO@PDMS fiber film. The vinyl silane coupling agent is used for surface modification of the barium titanate nanoparticles, the dispersibility of the barium titanate nanoparticles in the polydimethylsiloxane is improved, and the high-voltage electric field in the electrospinning is used to make the barium titanate internal dipole complete a step polarization from disorder to order in the preparation process of the film, so that the BTO@PDMS fiber film with piezoelectric properties is obtained.

The present invention provides a method for manufacturing a synthetic resin filler containing a high shell powder content, the method comprising: 1) a shell powder micronization step; 2) a shell powder pretreatment step; 3) a step of manufacturing shell powder-containing synthetic resin fibers; 4) a step of manufacturing shell powder-containing masterbatch by using the shell powder-containing fibers and synthetic resin; 5) a step of electrospinning the shell powder-containing masterbatch; and 6) a step of collecting a filler composed of the electrospun shell powder-containing synthetic fibers. The shell powder-containing filler thus obtained has a high shell powder content, enabling recycling of fishery by-products on a commercial scale and manufacturing of fillers having antibacterial and heat-retention effects of the shell powder.

A disposable cartridge is disclosed that can be removably disposed in an electrostatic applicator. The disposable cartridge can include a cartridge housing and a nozzle positioned at and extended at least partially away from a distal end of the cartridge housing. The nozzle is configured to deliver the treatment solution to a treatment site and configured to be in fluid communication with an air propulsion mechanism of the electrostatic applicator. At least one electrode can be included to electrostatically charge and ionize molecules of the treatment solution of the cartridge so that the at least one electrode contacts the treatment solution and applies an electrical charge to the treatment solution.

This invention discloses a method for direct writing micropillar structures using near-field electrospun beaded fibers. In this method, magnetic domain-dependent metal particles are added to the spinning solution to form a uniform beaded structure. The micropillar structure can be prepared in one step by utilizing the electrostatic repulsion and jet attraction between the beads. During the electrostatic jet process, the charge is carried by the beaded fibers, and the liquid droplets carrying the same charge repel each other. After the beaded fibers are deposited on the receiving plate, they are polarized under the action of a high-voltage electric field, carrying a positive charge and attracting liquid droplets carrying the opposite charge from the air jet. Upon contact, the liquid droplets fuse together under the action of surface tension, and then continue to attract the jet deposition to form the micropillar structure. This method solves the problems of high cost, expensive equipment, and complex preparation processes associated with traditional micropillar processing methods. Furthermore, this method can be widely used for various electrojet direct writing materials.

Problem: To provide a polyamide-imide resin that enables stable spinning of a nanofiber having a small diameter, a polyamide-imide fiber formed from the polyamide-imide resin, and a nonwoven fabric including the polyamide-imide fiber. Solution: A polyamide-imide resin including a constitutional unit derived from an organic acid salt compound.

The invention provides a surface-functionalised polymeric object (10), comprising: a bulk material (11) comprising a copolymer containing constitution units derived from a first comonomer and constitution units derived from a second comonomer, the first comonomer being selected from L-lactide and D-lactide and forming sequences of oligo(L-lactide) or oligo(D- lactide) in the copolymer the copolymer having a substantially random, partially blocky structure with a dyad ratio of (lactide-lactide)-dyads to (lactide-second comonomer)-dyads of at least 2.0:1; and a surface layer (12) disposed on a surface of the bulk material (11), the surface layer (12) comprising a functionalising species and at least one chain of poly(D-lactide) or of poly(L- lactide) covalently bound to the functionalising species, and at least one chain being different from the oligo(L-lactide) sequences or oligo(D-lactide) sequences contained in the copolymer; wherein the surface layer (12) is attached to the bulk material (11) via stereocomplexes formed between the poly(D-lactide) chain(s) of the functionalising species and the oligo(L-lactide) sequences contained in the copolymer or via stereocomplexes formed between the poly(L- lactide) chain(s) of the functionalising species and the oligo(D-lactide) sequences contained in the copolymer, respectively. The surface-functionalised polymeric object can be produced in a one-step procedure by coaxial electrospinning.

This invention discloses a GTR membrane, its preparation method, and its application, belonging to the field of biomedical materials technology, and solves the problem of insufficient antibacterial effect of existing GTR membranes. The method includes the following steps: uniformly dispersing BaTiO3 in a Tris buffer solution; dissolving dopamine hydrochloride powder in the reaction system; stirring evenly; centrifuging to collect the precipitate; cleaning and drying to obtain PDA@BaTiO3 nanoparticles; adding the PDA@BaTiO3 nanoparticles to a silver ammonia solution; stirring at room temperature; centrifuging to collect the precipitate; cleaning and drying to obtain Ag@PDA@BaTiO3 particles; uniformly dispersing the Ag@PDA@BaTiO3 particles in a hexafluoroisopropanol solution of L-polylactic acid; electrospinning the reaction system to obtain a fiber membrane; and sequentially subjecting the membrane to ventilation, high-temperature annealing, and natural cooling to room temperature to obtain the GTR membrane. The GTR membrane provided by this invention possesses both piezoelectric and photothermal effects, exhibits rapid sterilization and long-lasting antibacterial activity, and has a simple preparation process.

The present invention relates to an elastomer material comprising cashew gum and, at least, another polymer, and a method for obtaining same based on an electro-hydrodynamic and / or aero-hydrodynamic processing of a previously prepared mixture of cashew gum and another polymer.

The present application provides a PVB low-frequency sound insulation film for laminated glass and a preparation method thereof, the preparation method comprising the following steps: a) dispersing multi-walled carbon nanotubes in an organic solvent to obtain a suspension solution; b) dissolving a piezoelectric polymer in the suspension solution obtained in step a) to obtain an electrospinning solution; c) electrospinning the electrospinning solution obtained in step b) by using the roller in the middle of a three-roller calender as a spinning receiver, while two PVB films enter through the upper and lower rollers of the three-roller calender, and the electrostatic fiber film is sandwiched between the PVB films through the pressing action of the heating rollers of the three-roller calender to obtain a PVB low-frequency sound insulation film for laminated glass. The preparation method prepares piezoelectric fibers through an electrospinning process, and then the fibers are compounded with PVB films through hot pressing to obtain piezoelectric fiber reinforced PVB films. The low-frequency sound insulation performance of the material is significantly improved, and the material is especially suitable for PVB low-frequency sound insulation films for laminated glass.

This invention proposes a temperature-controlled textile fabric and its preparation method. The fabric material includes acrylic temperature-controlled yarn and nylon-spandex yarn. The acrylic temperature-controlled yarn contains 5%-10% by mass of a thermosensitive phase change material. The thermosensitive phase change material includes a NIPAAm-polyethylene glycol diacrylate-sodium alginate ternary copolymer phase change material. In this invention, the oxygen-containing groups in the polyethylene glycol diacrylate of the phase change material crosslink with the hydroxyl groups in NIPAAm and the amino groups in sodium alginate to form a three-dimensional network structure of hydrogel spheres. Simultaneously, the functional groups on the surface of the phase change material have a strong binding force with the acrylic fibers, increasing the fabric's temperature control and washability.

This invention discloses the preparation of a MOFs-based multifunctional three-dimensional network nanocomposite fiber membrane material and its application in the removal of radioactive iodine aerosols. The method includes: dissolving at least two polymers in an organic solvent, then adding MOFs powder and stirring to form a precursor solution; electrospinning the precursor solution to obtain the MOFs-based multifunctional three-dimensional network nanocomposite fiber membrane material. This invention provides new ideas for the design and synthesis of electrospun fiber membranes and for the deep purification of iodine aerosols. Furthermore, compared with other fiber membrane materials, this fiber membrane material exhibits good radiation stability, high adsorption capacity, and excellent filtration efficiency. It has potential applications in the field of nuclear fuel reprocessing technology, including the adsorption of radioactive iodine gas and methyl iodine, as well as the filtration of radioactive aerosols.

This invention belongs to the field of environmental dust removal technology, and particularly relates to a method for modifying baghouse filter bags using tobermorite. The method includes the preparation of tobermorite gel, Mn-C–S–H gel, modified Mn-C–S–H gel, tobermorite spun fibers, modified tobermorite filter cloth, and filter bags. Compared with existing technologies, the beneficial effects of this invention are: 1) By modifying the baghouse filter material fibers with tobermorite, the high-temperature resistance and corrosion resistance of the filter bags are improved, increasing their adsorption capacity for carbon dioxide and nitric oxide, thus meeting the performance requirements of baghouse dust collectors. 2) Comparing the modified filter material with the unmodified filter material, the results show that the modified material can increase the CO2 dust removal efficiency by 4 times, and the best NO removal efficiency in flue gas can reach 85%.

The patch product comprises a membrane substrate suitable to be absorbed by the skin and based on natural polymers, as well as at least one active ingredient. It can be packaged in a wrapping comprising a support base, on which the patch product is placed, and a coating layer that acts as protection for the patch product.

This invention discloses a core-shell composite piezoelectric fiber material and its preparation method. The invention first prepares a core-shell composite nanofiber with PVDF-TrFE as the shell and PC as the core using a coaxial spinning process. Using PC as the core increases the elastic modulus of the composite piezoelectric fiber, resulting in a larger piezoelectric potential than pure PVDF-TrFE fibers under the same strain. Simultaneously, PC forms hydrogen bonds at the interface with PVDF-TrFE, increasing the crystallinity of the PVDF-TrFE shell and thus improving the piezoelectric properties. The core-shell composite piezoelectric fiber has a d... 33 The piezoelectric coefficient can reach 49.1 pC N. ‑1 It is 110% higher than that of pure PVDF-TrFE.

Embodiments herein relate to chemical sensing elements including a rolled multilayer structure. In a first aspect, a method of making a chemical sensor element is included, the method including depositing a polymer layer onto a deposition substrate, infusing a chemical sensor composition into the polymer layer, applying a hydrogel layer over the polymer layer to form a multilayer film, rolling the multilayer film down the deposition substrate, and slicing the multilayer film to form the chemical sensor element. Other embodiments are also included herein.

This application discloses the application of vanillyl butyl ether in topical skin agents, vanillyl butyl ether cyclodextrin inclusion complexes, and a method for preparing a fiber facial mask. Vanillyl butyl ether is used as an antioxidant and heat-generating ingredient in topical skin agents, with an addition amount of 0.01–10 wt%. It also provides a method for preparing vanillyl butyl ether cyclodextrin inclusion complexes: (1) dissolving the vanillyl butyl ether in ethanol to obtain a vanillyl butyl ether alcohol solution; (2) dissolving the cyclodextrin in water and stirring until completely dissolved to obtain a cyclodextrin aqueous solution; (3) adding the vanillyl butyl ether alcohol solution prepared in step (1) to the cyclodextrin aqueous solution prepared in step (2), stirring to achieve inclusion, removing the solvent, and drying. This application encapsulates vanillyl butyl ether, improving its solubility in water, and prepares a nanofiber heat-sensing facial mask using electrospinning, exhibiting ideal antioxidant and heat-generating effects.

This invention discloses a biodegradable cellulose nanoparticle sustained-release drug-loaded film and its preparation method, belonging to the field of pharmaceutical functional materials technology. The invention involves mixing and stirring microcrystalline cellulose and a 64 wt% sulfuric acid solution, then centrifuging, dialyzing to neutral, and freeze-drying to obtain CNCs (cell nanoparticles). The CNCs, NaIO4, and water are mixed and subjected to a light-protected reaction, followed by ethanol precipitation, dialyzing purification, and freeze-drying to obtain aldehyde-modified CNCs. The aldehyde-modified CNCs, sericin, polyvinyl alcohol, water, and the target drug are mixed and stirred to obtain a core layer solution. Polylactic acid-glycolic acid copolymer is dissolved in a mixture of chloroform and DMF to obtain a shell layer solution. The core layer solution and shell layer solution are coaxially electrospun to form drug-loaded fibers. The drug-loaded fibers are then subjected to biomimetic mineralization surface modification to obtain a biodegradable cellulose nanoparticle sustained-release drug-loaded film, which improves the drug loading rate, enhances the mechanical properties of the drug-loaded film, and exhibits sustained-release and controllable release effects.