67 results about "Graphene" patented technology

The invention relates to polyester conductive fibers and provides graphene conductive polyester fibers having good conductivity and lasting static resistance and a preparation method thereof. Through surface sulfonic acid group functionalization of graphene, graphene particles have sizes less than 1 micrometer and have good dispersibility, graphene, carbon nanotubes and a surfactant are stirred and mixed according to a mass ratio of 1-5: 1-5: 1-5: 1 and then are dispersed to form conducting particles, the conducting particles are added into polyester powder, the mixture is processed to form graphene superconducting masterbatches by a twin-screw granulation technology, and the graphene conductive polyester fibers are prepared by a spinning technology adopting a double-component composite spinning method or a single-component blending spinning method. The graphene conductive polyester fibers have the characteristics of simple production processes, low energy consumption, low labor and mass production feasibility.

The invention relates to an infrared spectrum enhancement and detection method and an infrared spectrum enhancement and detection device based on a graphene nano antenna. The device comprises a light source, a collimating lens, a one-point detector and an MEMS (micro-electromechanical system) grating light modulator based on the three-dimensional graphene nano antenna. Infrared light emitted from the light source is irradiated to the MEMS grating light modulator based on the three-dimensional graphene nano antenna through the collimating lens, an interference signal of the MEMS grating light modulator can be detected by the one-point detector, a detection signal is demodulated through Fourier transform, a spectrum is reproduced, and trace molecules are detected according to obtained spectrum information; the device has the advantages of good stability, high response speed, high sensitivity, dynamic tunable broadband, high enhancement factor and the like, can be expected to greatly increase the variety of substances detected by an infrared spectroscopic analysis technology and improve the detection sensitivity of the infrared spectroscopic analysis technology, and has a huge development space and a wide application prospect.

The invention provides a high-tenacity polycrystalline composite material. The high-tenacity polycrystalline composite material particularly comprises, by mass, 72%-92% of polycrystalline super-hard phase, 7.5%-25% of binding agents and 0.5%-15% of toughening agents. The toughening agents are one of aluminum oxide whiskers, silicon nitride whiskers, silicon carbide whiskers, carbon nano tubes and graphene or the combination of several of the aluminum oxide whiskers, the silicon nitride whiskers, the silicon carbide whiskers, the carbon nano tubes and the graphene. The invention further provides a high-tenacity polycrystalline blade prepared from the high-tenacity polycrystalline composite material and a preparation method of the high-tenacity polycrystalline blade. The preparation method comprises the steps of isostatic forming, vacuum heat treatment activation, and high-temperature and high-pressure sintering. The high-tenacity polycrystalline blade has good tenacity and cutting performance, and the preparation technique is simple and easy to implement.

The disclosed embodiments provide a battery cell. The battery cell includes a cathode current collector containing graphene, a cathode active material, an electrolyte, an anode active material, and an anode current collector. The graphene may reduce the manufacturing cost and/or increase the energy density of the battery cell.

The invention belong the hygiene field, and especially relates to a graphene anti-PM2.5 mouth mask functional layer, a preparation method and applications in a filter sheet. The anti-PM2.5 mouth mask filter sheet functional layer is active carbon with addition of graphene. The mouth mask can absorb PM2.5 effectively, the adsorption capability is high, bacteria resistance and bacteriostasis are achieved, spinning is not need, and the preparation technology is simplified, which facilitates industrial production.

The invention discloses a microelectronic temperature sensor and a preparation method thereof. Specifically, the sensor is a graphene oxide capacitive temperature sensor based on a post-COMS MEMS micro-processing technology. A graphene oxide material is a new type nano-material which has a high dielectric constant, and a dielectric constant value can be changed rapidly along with the change of a temperature. Compared with the temperature sensors such as a common Pt resistor and a PN junction, the microelectronic temperature sensor has the advantages that because a current does not pass through a device, the influence of self-heating effect on a measurement process is avoided when the measurement is carried out, the measurement error is low, the heat loss is low and the dynamic response time is short. Because the dielectric constant of the graphene oxide can be increased rapidly along with the rise of the temperature at the low temperature, a method for detecting a required high-sensitivity temperature sensor at the low temperature is realized. Through combination of the post-COMS MEMS micro-processing technology, the temperature sensor is small in size, low in cost and short in response time.

The invention relates to a fiber laser. An all-fiber dual-ring laser is formed by a semiconductor laser, an active fiber, a wavelength division multiplexer, a polarization controller, a fiber isolator and a saturable absorber based on graphene. The fiber laser is characterized in that the saturable absorber is shared to realize the output of dual-wavelength synchronous Q-switched pulse. The fiber laser is low in energy loss, compact and simple in structure and simple and convenient in operation, and has extremely great application advantages in fiber communications, non-linear frequency conversion, multi-wavelength pumping detection spectrums and Raman scattering spectrums.

The invention discloses polymer functional graphene and a preparation method and application thereof. Graphene is connected with a polymer through the combination of at least one of imide, amide, ester groups and amidogen, wherein the polymer is a polymer at least containing one benzene ring and with the molecular weight of 200-500,000 and interacts with the graphene through covalent bonds, hydrogen bonds and/or pi-pi conjugation. The polymer functional graphene is excellent in dispersion property in non-polar solvents and excellent in dispersion stability, and cannot precipitate after long-time storage for multiple months; according to the adopted preparation method, the polymer with amidogen, hydroxyl and carboxyl reacts with epoxy, hydroxyl and the like on the graphene and then is subjected to covalent grafting on the surface of the graphene, and the grafting rate of the polymer reaches 30% or above. In addition, the obtained polymer functional graphene can be widely applied to lubricating oil, plastic, rubber, paints, adhesives, fibers and other fields, and has potential application value.

The invention discloses a novel microchip laser supporting optical fiber output, which belongs to the fields of laser technology and non-linear optics. The novel microchip laser mainly comprises a laser diode pumping source, an optical fiber output system, an optical collimation system, a laser light gain medium and optical elements, wherein pump light enters the optical collimation system for collimating after passing through the optical fiber output system, and is focused onto the gain medium; the film-plated optical elements are arranged in front of and behind the gain medium; the gain medium and the film-plated optical elements in front of and behind the gain medium construct a laser resonant cavity with a sandwich structure; laser light generated by the laser resonant cavity returns along the incident direction of the pump light, passes through the optical collimation system once again, and is output through the optical fiber output system. The novel microchip laser has the characteristics that optical fiber output is performed during the use of an optical fiber pump without any additional output device in a sandwich microchip structure, and a fiber-core pump or a cladding pump can be adopted, so that the flexibility of a system is improved greatly; and meanwhile, the structure can also be applied to pulse modulation of materials such as semiconductor saturable absorbing mirrors, single-wall carbon nanotubes or graphene and the like, and stable pulse output is realized.

The invention discloses compound antibacterial gel. The compound antibacterial gel is formed by mainly compounding benzalkonium bromide or benzalkonium chloride and oxidized graphene, wherein the weight ratio of the benzalkonium bromide or the benzalkonium chloride to the oxidized graphene is 1-10:2-6. The invention also discloses a preparation method of the compound antibacterial gel and applications of the compound antibacterial gel. The preparation method is simple. Characteristics of the benzalkonium bromide and the oxidized graphene are combined, and disadvantages that the benzalkonium bromide and the oxidized graphene individually are not antibacterial in a wide range at a certain concentration and are not easily recovered are remedied. The compound antibacterial gel has antibacterial activity for Gram-negative bacterium and Gram-positive bacterium simultaneously, and can be applied widely.

The invention relates to high-strength high-elongation antibacterial soft graphene rubber latex. An improved formulation is adopted, and the latex is composed of, by weight, 48-192 parts of rubber matrix, 0.5-1.5 parts of sulfur, 0.5-1.5 parts of zinc oxide, 0.5-3.0 parts of titanium dioxide and 2-8 parts of graphene dispersion liquid. By using the latex to produce rubber products, especially at temperature below zero DEG C in winter, or when the latex is used to produce ultrathin rubber products, the latex is high in softness, strength and elongation; rubber products added with graphene are naturally antibacterial and can protect users more effectively.

A method of producing a powder mass for a lithium battery, the method comprising: (a) mixing graphene sheets and an elastomer or its precursor in a liquid medium or solvent to form a suspension; (b) dispersing a plurality of particles of an anode active material in the suspension to form a slurry; and (c) dispensing the slurry and removing the solvent and/or polymerizing/curing the precursor to form the powder mass, wherein the powder mass comprises multiple particulates of the anode active material, wherein at least one of the particulates is composed of one or a plurality of the particles encapsulated by a thin layer of graphene/elastomer composite having a thickness from 1 nm to 10 μm, a lithium ion conductivity from 10⁻⁷ S/cm to 10⁻² S/cm and an electrical conductivity from 10⁻⁷ S/cm to 100 S/cm.

The invention discloses a preparation method of a heat-conducting, electricity-conducting and electromagnetic-shielding multifunctional composite material, and belongs to the field of preparation methods of multifunctional composite materials. According to the preparation method of the heat-conducting, electricity-conducting and electromagnetic-shielding multifunctional composite material, nanometer ferrite, graphene, copper powder, carbon black, nanometer silicon carbide and a high polymer material are added in a formula. By means of the preparation method of the heat-conducting, electricity-conducting and electromagnetic-shielding multifunctional composite material, the electromagnetic-shielding effect of the composite material can be improved, and the tensile strength, the compressive strength and other material performance of the composite material can be improved.

The invention discloses a graphene modified self-lubricating wear-resistant coating. Mixed powder adopted comprises, by mass, 99.4-99.9% of WC-Co and 0.1-0.6% of graphene, after the powder making process of wet ball grinding on the mixed powder is completed, the powder is evenly scattered through ultrasonic treatment, drying is carried out, spraying powder with the grain size being 18-58 [mu]m is obtained through screening, and the graphene modified WC-Co self-lubricating wear-resistant coating is prepared by the adoption of an explosive spraying technology. The graphene modified WC-Co coating has the beneficial effects that the friction coefficient of the coating is decreased on the basis that the original high bonding strength and hardness of the WC-Co coating can be ensured, the abrasion loss is also reduced to a certain extent, the service life of parts can be prolonged, and the graphene modified self-lubricating wear-resistant coating is an excellent self-lubricating wear-resistant composite coating.

The invention belongs to the technical field of welding materials, and particularly relates to a bridge steel Q690qE matched flux-cored wire and a preparing method thereof. The flux-cored wire is manufactured in the manner that a low-carbon cold-rolled steel strip is wrapped by flux core powder, and the flux core powder accounts for 20%-35% of the total mass of the welding wire. The flux core components include, by mass percent, 3.0%-5.5% of FNiN-50 nano nickel powder, 0.5%-1.2% of nano chromium nitride powder, 0.2%-0.4% of nano graphene, 0.2%-0.8% of nano cerium oxide, 1.2%-2.0% of FeMn84C0.05 micro carbon ferromanganese, 1.0%-2.0% of AlSi50 aluminum intermediate alloy, 0.25%-0.45% of Nb powder, 2.5%-4.5% of Mo powder, 0.4%-1.0% of Cu powder, 0.5%-1.0% of zirconium hafnium alloy powder (the mass ratio of zirconium to hafnium is 96:4), 2.5%-3.5% of KBF4 and the balance FHT100.25 reduced iron powder.

The invention discloses an environment-friendly ceramic coating material for a water faucet. The environment-friendly ceramic coating material for the water faucet is prepared according to a formula comprising the following raw material components in percentage by mass: 80-100 parts of fluorocarbon resin, 8-10 parts of organosilicone oil, 3-5 parts of naphtha, 6-8 parts of polydimethylsiloxane, 10-12 parts of absolute ethyl alcohol, 5-8 parts of alkylphenol polyoxyethylene, 6-8 parts of castor oil polyethenoxy ether, 30-35 parts of an acrylic resin emulsion, 6-8 parts of a nano graphene oxide solution, 10-12 parts of perfluoropolyether, 5-6 parts of sodium chloride, 6-8 parts of disodium hydrogen phosphate, 5-6 parts of aluminum oxide, 6-10 parts of glass fiber powder, 5-8 parts of zinc powder, 6-8 parts of copper powder, 8-10 parts of carbon fiber powder, 8-10 parts of polybutylene terephthalate, 6-8 parts of calcium stearate, 5-8 parts of zinc stearate, 7-9 parts of sodium methyl silicate, 3-5 parts of isobutyl isobutyrate, 6-8 parts of ethlene bisstearamide and 8-10 parts of diethylene glycol monobutyl ether. The environment-friendly ceramic coating material for the water faucet has the advantages of corrosion resistance, wear resistance, high adhesive force, bright and clean appearance and compact coating structure.

The invention relates to ultralight bulletproof cloth and a manufacture method thereof, and belongs to the technical field of textile materials and protection materials. The manufacture method includes taking modified carbon fiber filaments as central core threads, taking modified ultra-high molecular weight polyethylene as a middle coating layer, taking cellulose acetate fibers as an outer coating layer, and preparing covering yarns; blending modified aramid fibers 1414, the modified ultra-high molecular weight polyethylene, graphene fibers and the cellulose acetate fibers to acquire blended yarns; spinning the covering yarns and the blended yarns into the ultralight bulletproof cloth by a spinner, wherein warp yarns are arrayed sequentially according to the principle that one covering yarn is matched with one blended yarn, and weft yarns are arrayed sequentially according to the principle that one covering yarn is matched with two blended yarns. The ultralight bulletproof cloth and the manufacture method thereof have the advantages that full polymer modified materials are adopted, and the carbon fiber framework design is introduced, so that strength, tenacity and impact resistance are high, penetration of low-speed bullets, bomb fragments and the like can be resisted effectively, and safety of human bodies can be guaranteed.

The invention discloses a graphene/functionalized metal-organic framework material composite intercalation as well as a preparation method and application thereof. The graphene/functionalized metal organic framework material composite intercalation is prepared by taking a metal-organic framework material and graphene in a certain ratio as main bodies, and is placed on the cathode side of a non-polar diaphragm of a lithium-sulfur battery, so electrolyte absorption and lithium ion diffusion can be promoted, interface impedance is effectively reduced, polysulfide is adsorbed to limit the diffusion of the polysulfide, the shuttle effect of the polysulfide is inhibited, and the loss of active substances is reduced; the assembled lithium-sulfur battery is high in capacity and slow in attenuationat high multiplying power and shows excellent cycling stability and multiplying power performance; and the intercalation can be widely applied to lithium-sulfur batteries.