55 results about "Nanotechnology" patented technology

Provided herein is a biocompatible implant for meniscus tissue engineering. Particularly, the biocompatible implant comprises a multi-layered crescent-shaped silk fibroin scaffold, in which each layer comprises distinct pore size and/or pore orientation, e.g., to mimic native meniscus complex architecture. Accordingly, the biocompatible implant can be used for repairing any meniscal defect or promoting meniscal regeneration in a subject.

The invention discloses an antistatic polyfluortetraethylene film and a preparation method thereof, the method comprises the steps of: at first, utilizing 100 parts of polyfluortetraethylene powders and 1-20 parts of an antistatic agent to be admixed in a high-speed agitator, wherein, such an antistatic agent is a composite antistatic agent consisting of acetylene carbon black, graphite, metal conductive powders and the like; then preparing an antistatic polyfluortetraethylene film by means of mixing raw materials, prepressing and performing, sintering at high temperature, film forming by turning, trimming, winding and the like. The antistatic polyfluortetraethylene film prepared according to the invention has a permanent antistatic effect and can sufficiently dissipate the charges accumulated on the surface thereof owing to friction, the added antistatic agent powders can also cooperate and reinforce therewith to a certain extent, thus overcoming the characteristics of inferior abrasive resistance and low hardness, and improving the mechanical performance of the polyfluortetraethylene.

The invention relates to a high-thermal-conductivity high-electrical-conductivity carbon nano-grade composite material. The material is characterized in that a polymer with a mass percentage of 3-30% is stuck and coated on the surface of carbon-based micro-nano powder with a mass percentage of 70-97%, and press molding is carried out, such that the material is obtained. According to the composite material, a layer of polymer is coated on the surface of high-thermal-conductivity high-electrical-conductivity carbon-based micro-nano powder with a water suspension method, such that the high-thermal-conductivity high-electrical-conductivity carbon nano-grade composite material powder is prepared. Preparation efficiency is high. When the method provided by the invention is used in preparing the high-thermal-conductivity high-electrical-conductivity carbon nano-grade composite material, the method is simple and feasible. The content of the carbon-based micro-nano powder filling material is high. The method can satisfy actual requirements of large-batch productions. The prepared high-thermal-conductivity carbon nano-grade material has good electrical conductivity and thermal conductivity, and can be applied in 3D printing materials, chemical equipment heat exchangers, laptops, high-power LED lightings, flat panel displays, digital cameras, mobile communication products, and fields of related miniaturized and high speed electronic components.

The invention relates to a method for preparing solid base catalyst with high specific surface by hybrid composite precursors, belonging to the technical field of preparation of composite metal oxide. The method comprises the following steps of: according to the characteristics of designability in structure and adjustability in laminate composition of laminated composite metal hydroxide, introducing a certain amount of Mg and Al, or Ca, Cu, Co, In and Ga on the laminate, preparing laminated compound, obtaining hybrid composite precursors by hybridization with carbon, then conducting high-temperature roasting on the precursors and obtaining the solid base catalyst of composite metal oxide with high specific surface and mesoporous structure. Due to introduction of the carbon into the precursors, the composite metal oxide obtained by the method has the characteristics of narrow pore size distribution and large specific surface area and the like, and the application of the catalyst in Knoevenagel condensation reaction of benzaldehyde and ethyl cyanoacetate shows good base catalytic activity.

The invention relates to an antibacterial functional polypropylene fiber as well as a preparation method and an application thereof. The antibacterial functional polypropylene fiber comprises the following components in percentage by mass: 1%-10% of antibacterial chip masterbatch and 90%-99% of polypropylene chips, wherein the antibacterial chip masterbatch comprises the following components in percentage by mass: 1%-5% of nano silver, 1%-5% of nano titanium nitride, 0.1%-1% of compatilizer and the balance of polypropylene chips. The preparation method comprises the following steps of: uniformly mixing the antibacterial chip masterbatch with the polypropylene chips, and spinning according to the chemical fiber spinning process to prepare the antibacterial functional polypropylene fiber. The antibacterial functional polypropylene fiber has the advantages of good antibacterial effect and wide application.

The invention discloses an ultra-precision machining method for a gallium oxide substrate and belongs to the technical field of machining of an original semiconductor. The ultra-precision machining method includes the following steps that firstly, slicing is conducted, wherein a gallium oxide crystal is sliced, and a gallium oxide crystal substrate blank is obtained; secondly, grinding is conducted; thirdly, polishing is conducted, namely, according to rough polishing, silk is used as a polishing gasket, rough polishing is conducted on the ground gallium oxide crystal substrate, the gallium oxide crystal substrate obtained after rough polishing is obtained, according to finishing polishing, silk is used as a polishing gasket, finishing polishing is conducted on the gallium oxide crystal substrate obtained after rough polishing, the gallium oxide crystal substrate obtained after finishing polishing is obtained, and diamond polishing paste is used as a polishing addition agent; and fourthly, cleaning is conducted. The ultra-precision machining method has the beneficial effects that green machining is conducted, and environment friendliness is achieved since the polishing paste and the silk used in the method belong to green and non-pollution consumables, and pressure cannot be caused to the environment at all; low-cost machining is achieved due to the fact that the consumables used in the method are low-cost materials; and machining steps are simplified.

The invention discloses a preparation method of a mesoporous silica in situ doped acrylic resin bone cement composite for enhancing durable release capacity of medicines. The preparation method comprises the steps of firstly, mixing an amino silicon dioxide nanometer material with bone cement liquid to obtain a mixture, mixing the mixture with a bone cement solidifying agent, and in the process ofa polyreaction, performing in-situ introduction of the mesoporous silica nanometer material containing medicines; and uniformly mixing a mesoporous silica material with the liquid agent, and besides,enabling amino and carboxyl in bone cement acrylic resin to form electrostatic interaction to realize uniform and stable distribution in the bone cement, and achieve the purpose of durable and uniform release of the medicines. The prepared composite is high in operability, self spaces can be used for efficiently loading the medicines, and unique 2-8-nm mesoporous bore diameter is designed to enable the medicines distributed in the deep layer of the bone cement to be slowly released to the outside of the cement, so that durable and efficient release of the medicines is realized, besides, the characteristic and the function of the bone cement can be individually improved, and the biocompatibility and the anti-infection characteristic of the bone cement can be improved.

The invention discloses uvioresistant fluorocarbon metal anti-rust paint and a preparation method thereof. The uvioresistant fluorocarbon metal anti-rust paint is prepared from slurrying raw materials and paint mixing raw materials; a paint film formed by the anti-rust paint has high hardness, scratch resistance, strong adhesion, salt fog resistance, saline resistance, acid-base resistance, water resistance, oil resistance, ultraviolet light resistance, aging resistance, low temperature resistance and heat and humidity resistance; the anti-rust paint can be used on the surface of an old paint film repeatedly; and the damage to the paint film can be avoided, and the ultra strong toughness of the paint film can be guaranteed. The service life of the common paint film can be 8 to 10 years.

The invention belongs to the technical field of regenerated fibers, and particularly relates to an antibacterial and antiviral regenerated cellulose fiber and a preparation method thereof. The antibacterial and antiviral regenerated cellulose fiber comprises a viscose fiber, a single-layer capsule wall composite microcapsule and a double-layer capsule wall composite microcapsule; capsule cores inthe single-layer capsule wall composite microcapsule and the double-layer capsule wall composite microcapsule independently comprise plant antibacterial and antiviral extracts and vitamins; componentsof a capsule wall of the single-layer capsule wall composite microcapsule comprises beta-cyclodextrin, a capsule wall of the double-layer capsule wall composite microcapsule comprises an inner-layercapsule wall body and an outer-layer capsule wall body, components of the inner-layer capsule wall body comprise beta-cyclodextrin, and components of the outer-layer capsule wall body comprise porousstarch; and the capsule wall of the single-layer capsule wall composite microcapsule is grafted and cross-linked with a bonding fiber, and the capsule wall of the double-layer capsule wall composite microcapsule is grafted and cross-linked with the viscose fiber. The antibacterial and antiviral regenerated cellulose fiber can avoid the loss of effective components; and meanwhile, the persistence of the effective components in playing a role can be improved.

The invention discloses an acetic acid styracin nanometer capsule and a preparation method thereof. The acetic acid styracin nanometer capsule is prepared from gelatin/gum arabic as a wall material, acetic acid styracin as a core material, tween 20 as an emulsifying agent, and glutamine aminopherase as a curing agent by using a composite coacervation method, and in the process of the preparation, the quantity of the gelatin, the gum arabic, the acetic acid styracin, the tween 20 and the glutamine aminopherase are computed in a mass ratio of 1:1:1-2:1-2:0.25. The acetic acid styracin nanometer capsule has favorable storage stability and heat stability, and can durably and effectively control the release of the core material, wherein the average particle diameter is 168.48nm-211.67nm, and the particle size distribution coefficient is 0.132-0.154. The acetic acid styracin nanometer capsule can be used in the fields of spice, essence, foods, cosmetics, detergents, and the like.

The invention discloses a device and a method for step type hot extrusion preparation of an Nd-phase-rich Nd2Fe14B/alpha-Fe permanent magnet, and relates to a device and a method of preparation of the Nd2Fe14B/alpha-Fe permanent magnet. The device and the method for step type hot extrusion preparation of the Nd-phase-rich Nd2Fe14B/alpha-Fe permanent magnet solve the technical bottleneck of preparing a block nano complex phase magnet. The device is formed by an extrusion puncher pin, a primary extrusion die, a secondary extrusion die, a die fixing sleeve and a heating device and the like. The method mainly comprises that Nd-phase-rich Nd2Fe14B powder is mixed with alpha-Fe powder, the powder mixed by a ball mill is stirred, a cold pressing blank of the Nd-phase-rich Nd2Fe14B powder and the alpha-Fe powder is prefabricated, vacuum packaging is carried out, the blank and the dies are heated, and step hot extrusion is carried out. The device and the method for step type hot extrusion preparation of the Nd-phase-rich Nd2Fe14B/alpha-Fe permanent magnet are used for preparing a block dense high-performance nano coupling permanent magnet.

The invention relates to the technical field of nano photocatalytic material preparation and hydrogen production application thereof, and in particular relates to a silver sulfide/tungsten trioxide-based z-type photocatalytic material as well as a preparation method and application thereof, the silver sulfide/tungsten trioxide-based z-type photocatalytic material has a zero-dimensional/one-dimensional composite structure, the zero-dimensional structure is silver sulfide nano-particles, the one-dimensional structure is a tungsten trioxide nanorod, and the silver sulfide nano-particles are dispersed on the surface of the tungsten trioxide nanorod. WO3 and Ag2s are respectively provided with one-dimensional and zero-dimensional structures, and the migration path of photogenerated charges canbe shortened, so that the photogenerated charges are rapidly transferred to the surface of the material, and the composite probability of photogenerated carriers in a material body phase is reduced; the photogenerated charge transfer mode between Ag2SNPs and WO3NRs follows a z-type photo-catalytic charge transfer mechanism, while the photogenerated charge oxidation reduction capability is maintained, the separation efficiency of the photongenerated carriers is further improved, and the silver sulfide/tungsten trioxide-based z-type photocatalytic material has better performance of photocatalytic water decomposition for hydrogen production.

The invention discloses a preparation method of In2O3 hollow nanospheres coated by a nitrogen and sulfur doped carbon layer. The preparation method comprises the following steps: with spherical In(OH)(2,5-PDC) with uniform size and morphology as a precursor, setting proper calcining temperature, calcining time and calcining atmosphere to form indium oxide hollow nanospheres, which are uniform insize and uniformly coated with N and S element doped carbon layers. The N and S elements in the precursor In(OH) (2,5-PDC) hollow sphere are introduced by adding a nitrogen-rich organic ligand (2,5-pyridine dicarboxylic acid) and a nitrogen and sulfur-rich regulator (2,1,3-benzoisothiazole-3-ketone), and the N and S element doped C-coated In2O3 hollow nanosphere is obtained after heat treatment. According to the preparation method disclosed by the invention, the In(OH) (2,5-PDC) hollow sphere with uniform size and morphology is synthesized through a one-step simple solvothermal reaction.

The invention relates to a method for preparing the conductive filler of antistatic materials. The method belongs to the technical field of conductive filler. The method aims at the existing problems including the loss of antistatic performance during the long-term use of antistatic conductive fillers, the large additive amount of carbon black, the low dispersity and the poor mechanical properties of carbon black in substrate, and the poor adjustability. To prepare the conductive filler of antistatic materials with high antistatic performance, at first, the method utilizes the natural conductive antistatic materials contained in sugarcane roots and soybean sprouts to cultivate microorganism through stewing and crude extracting, and blending with nutriment; during the cultivation period, the antistatic performance of the microorganism is improved by using electricity as the induction to promote the variation of the microorganism; then, the microorganism is used to modify the carbon black to improve the dispersity and the mechanical properties of the carbon black, while the conductivity of the carbon black is further improved by loading silver ions on the surface of the carbon black.

The invention relates to a composite heat-conductive material and a preparation method thereof. The composite heat-conductive material comprises a polymer matrix and carbon nanofiber cloth which is embedded inside the polymer matrix, wherein the carbon nanofiber cloth is arranged perpendicular to the extension direction of the composite heat-conductive material, and is of a wave shape, and the carbon nanofiber cloth is obtained through calcination of an electrospinning film. The carbon nanofiber which is prepared from the electrospinning are combined with metal nanoparticles, a simple low-temperature sintering process is performed so as to form coated carbon nanofiber, a crosslinked heat-conductive skeleton is formed by the carbon nanofiber together with the metal nanoparticles, and the high-heat-conductive material is prepared through compounding of the coated carbon nanofiber with the polymer matrix.

The invention provides a monolithic porous catalytic stirring paddle and a preparation method thereof. The monolithic porous catalytic stirring paddle is formed by adopting a 3D printing technology and comprises a paddle shaft and paddle blades, wherein the surface of each paddle blade is loaded with a catalyst layer; and in a stirring paddle structure model for 3D printing, a skeleton structure of the paddle blades is formed by filling of repeated structure units. The monolithic porous catalytic stirring paddle prepared by the preparation method has the advantages of high structural precision, high mechanical strength and the like, can be used for high-temperature and high-pressure reaction under harsh reaction conditions, and is relatively wide in application field.

The invention relates to the technical field of release films, in particular to a preparation method of a silicon-free PET release film. The silicon-free PET release film comprises a PET film, and ischaracterized in that release agents are coated on two sides of the PET film. The silicon-free PET release film prepared by the invention has very good toughness, drug resistance, heat resistance andhigh transparency, is very suitable for various processing and use, does not contain silicon, and has the characteristics of good anti-sticking effect, stable performance and good high-temperature resistance.

The invention discloses a method for preparing a micro-mesoporous carbon anode material from an amino acid modified metallic organic framework and application. The method comprises steps of synthesizing the amino acid modified metallic organic framework, pretreating the metallic organic framework material, carrying out a carbonization reaction, and the like, the synthesized metallic organic framework is washed and dried, and high-temperature carbonization treatment is carried out directly, and then a nitrogen doped porous carbon material of a rich micro-mesoporous structure is prepared. Compared with a pure metallic organic framework-based carbon material, the carbon electrode material prepared by using the method has a large specific surface area, a large aperture distribution range and alarge pore volume, and has high activity for electro-catalysis oxygen reduction reactions. Meanwhile, the preparation method is simple and easy to control, gentle in condition, easy in raw material obtaining and good in application prospect.

The invention discloses nano conductive ink. The nano conductive ink is prepared from the following components: 60-80 parts of conductive metallic packing, 0.1-5 parts of silver nanoparticles 2-50nm in particle size, 1-12 parts of high molecular organic resin, 0.5-5 parts of an adhesion accelerant, 0.1-2 parts of a flatting agent, 0.1-2 parts of an antifoaming agent and 10-25 parts of an organic solvent. The invention also discloses a preparation method of the nano conductive ink, an RFID antenna of the nano conductive ink, and a preparation method of an RFID electronic tag. The nano conductive ink has the beneficial effects that the RFID antenna printed by using the nano conductive ink is ultrathin and uniform in thickness and has good conductivity and adhesive force, also consumption ofthe conductive ink can be reduced by reducing the thickness of the RFID antenna, and the cost is greatly reduced.

The invention discloses a preparation method of an Ag2Se/GO nano material with a micro-flower structure and application of the nano material in photocatalytic degradation of textile waste liquid. Thepreparation method comprises the following steps: pouring a mixed solution containing a silver source and a selenium source into a high-pressure reaction kettle which is lined with polytetrafluoroethylene and contains graphene oxide sheets, and then sealing and placing in a reaction furnace to perform heating for reaction to obtain the nano material with the Ag2Se/GO micro-flower structure, wherein the mixed solution containing the silver source and the selenium source is prepared by dissolving silver nitrate in deionized water, adding EDTA, mixing uniformly, adding selenium powder and sodiumborohydride into the mixed solution, and stirring uniformly. The Ag2Se/GO nano material with the micro-flower structure synthesized by the preparation method has excellent photocatalytic performance and can be used as a photocatalyst to purify textile wastewater, degrade colored dyes and the like.

The invention provides an acellular matrix particle product for soft tissue filling and repairing, and a preparation method of the acellular matrix particle product. The acellular matrix particle product comprises the following components in percentage by mass: 2.0-10% of acellular matrix particles, 0.1-5.0% of suspending aids and the balance of water for injection, wherein the acellular matrix particles are formed by mixing one or more of non-crosslinked acellular matrix particles, low-crosslinked acellular matrix particles and high-crosslinked acellular matrix particles. The decellularized matrix particle product provided by the invention is good in elasticity, soft in texture and high in resilience force, can form decellularized matrix particle products with different degradation gradients, different degradation time and different space structures according to the preparation technologies of the decellularized matrix particle product, is suitable for filling and repairing soft tissues, including dermal superficial tissues, dermal deep tissues, subcutaneous tissues and the like, and has a good application prospect.