52 results about "Nanofoam" patented technology

A nano-cellular polymer foam is disclosed, which has an average pore size from about 10 nanometers to about 500 nanometers; and a foam density that is from about 1 percent to about 50 percent of the bulk density of the material of the nano-cellular foam.

The invention relates to processes for the synthesis of 2-D and 3-D periodic porous silicon structures and composites with improved properties having the advantages of porous silicon and photonic bandgap materials. Photonic crystals comprise a two dimensionally periodic or three dimensionally periodic microporous structural matrix of interconnecting, crystallographically oriented, monodispersed members having voids between adjacent members, and said members additionally having randomly nanoporous surface porosity. The silicon nanofoam material shows enhanced and spectrally controlled / tunable photoluminescence and electroluminesce and finds use as transparent electrodes, high-lumonosity light emitting diodes (LEDs), wavelength division multiplexors, high-active-area catalyst supports, photonic bandgap lasers, silicon-based UV detectors, displays, gas sensors, and the like.

A delivery system for a shaving aid material includes a hydrophilic foam pad or similar applicator device and shaving aid material disposed in the foam. The foam is attached to the razor cartridge such that during a shaving operation, the foam is squeezed against the user's skin and the shaving aid material is dispelled from the foam. The shaving aid material is a water soluble composition that may be impregnated into the foam, which may be a nanofoam. A razor cartridge with which the delivery system may be used has a frame that defines a skin-contacting surface, at least one razor blade located in the frame, and the shaving aid delivery system coupled to the skin-contacting surface. A shaving implement having a handle and a razor cartridge attached thereto has the shaving aid delivery system attached to the razor cartridge.

A fusible link for a semiconductor device comprises an insulating substrate and a conductive line pair on the surface of the insulating substrate, with the conductive line pair having spaced ends. A polymer is disposed over the insulating substrate and between the conductive line pair ends. The polymer is capable of being changed from a non-conductive to a conductive state upon exposure to an energy beam. Preferably, the polymer comprises a polyimide, more preferably, a polymer / onium salt mixture, most preferably, a polyaniline polymer doped with a triphenylsufonium salt. The link may further comprise a low k nanopore / nanofoam dielectric material adjacent the conductive line ends.

The invention relates to processes for the synthesis of 2-D and 3-D periodic porous silicon structures and composites with improved properties having the advantages of porous silicon and photonic bandgap materials. Photonic crystals comprise a two dimensionally periodic or three dimensionally periodic microporous structural matrix of interconnecting, crystallographically oriented, monodispersed members having voids between adjacent members, and said members additionally having randomly nanoporous surface porosity. The silicon nanofoam material shows enhanced and spectrally controlled / tunable photoluminescence and electroluminesce and finds use as transparent electrodes, high-lumonosity light emitting diodes (LEDs), wavelength division multiplexors, high-active-area catalyst supports, photonic bandgap lasers, silicon-based UV detectors, displays, gas sensors, and the like.

A fusible link for a semiconductor device comprises an insulating substrate and a conductive line pair on the surface of the insulating substrate, with the conductive line pair having spaced ends. A polymer is disposed over the insulating substrate and between the conductive line pair ends. The polymer is capable of being changed from a non-conductive to a conductive state upon exposure to an energy beam. Preferably, the polymer comprises a polyimide, more preferably, a polymer / onium salt mixture, most preferably, a polyaniline polymer doped with a triphenylsufonium salt. The link may further comprise a low k nanopore / nanofoam dielectric material adjacent the conductive line ends.

A method is disclosed to fabricate carbon foams comprising a bicontinuous network of disordered or irregular macropores that are three-dimensionally interconnected via nanoscopic carbon walls. The method accounts for (1) the importance of wetting (i.e., matching the surface energies of fiber to sol) and (2) the viscosity of the microheterogeneous fluid filling the voids in the carbon paper. Carbon fiber papers are mildly oxidized by plasma etching, which greatly enhances the uniform uptake of resorcinol-formaldehyde (RF) mixtures. The RF solutions are oligomerized prior to infiltration and are cured into continuous polymeric webs that hang supported between adjacent carbon fibers; the polymer-fiber composites are pyrolyzed and retain a sponge-like morphology with 10-1000-nm pores and integrated electronic pathways

Robust, flexible, lightweight, low profile enhanced performance dielectric barrier discharge actuators (plasma actuators) based on aerogels / nanofoams with controlled pore size and size distribution as well as pore shape. The plasma actuators offer high body force as well as high force to weight ratios (thrust density). The flexibility and mechanical robustness of the actuators allows them to be shaped to conform to the surface to which they are applied. Carbon nanotube (CNT) based electrodes serve to further decrease the weight and profile of the actuators while maintaining flexibility while insulating nano-inclusions in the matrix enable tailoring of the mechanical properties. Such actuators are required for flow control in aeronautics and moving machinery such as wind turbines, noise abatement in landing gear and rotary wing aircraft and other applications.

The invention belongs to the field of preparation engineering of composite nano materials, and particularly relates to a nano bismuth / nitrogen-doped carbon foam nanosheet two-dimensional composite material as well as a preparation method and application thereof. According to the invention, a two-dimensional bismuth-based metal organic framework compound precursor is prepared through a solvothermalreaction technology, and then the nano bismuth / nitrogen-doped carbon foam nanosheet composite material is controllably synthesized through a carbothermal reduction technology. The method comprises the steps of adding a bismuth source and trimesic acid into ethylene glycol, stirring, carrying out hydro-thermal treatment to form a mixed solution, separating to obtain a precursor, drying, adding melamine, and carrying out carbon thermal reduction to generate the nitrogen-doped carbon nano-foam nanosheet composite material containing nano bismuth particles. The Nano bismuth particles in the two-dimensional nanosheet composite material are limited in a nitrogen-doped carbon nano-foam cavity to form an egg yolk-shell microstructure. The bismuth nano-particles of the prepared nano composite material are good in size controllability, and the nano composite material shows excellent electrochemical performance when being used as a negative electrode material of a potassium ion battery.

In accordance with invention, there are methods for fabricating hollow spheres and nanofoams. The method for making hollow spheres can include providing a homogeneous precursor solution including a first solvent and one or more anhydrous precursor species and forming aerosol droplets having a first size distribution using the homogeneous precursor solution in an anhydrous carrier gas. The method can also include transporting the aerosol droplets through an aerosol reactor including a reactant to form a plurality of hollow spheres, wherein each of the plurality of hollow spheres can be formed by one or more chemical reactions occurring at a surface of the aerosol droplet. The method can further include controlling size and thickness of the hollow spheres by one or more of the precursor solution concentration, aerosol droplet size, temperature, residence time of the aerosol droplets in the aerosol reactor, and the reactant distribution in the aerosol reactor.

Antibacterial metallic nanofoams, substrates having the nanofoam coated thereon, methods for preventing, inhibiting, and / or killing bacterial growth using the metallic nanofoams, and compositions and methods for making the metallic nanofoams.

The invention discloses a NiSe2-CoSe2 / CFs composite material with micro-nano two-stage pores and high structural stability and preparation of the NiSe2-CoSe2 / CFs composite material. The composite material comprises a micron-stage porous carbon fiber matrix and a nano foamed NiSe2-CoSe2 material loaded on the carbon fiber matrix, and the atomic ratio of Ni to Co is (1.6-2.5):1. The carbon fiber loaded NiSe2-CoSe2 composite material is prepared by using a hydrothermal method and a chemical vapor deposition method, and is subjected to heat treatment in the atmosphere of H2 and N2. The product provided by the invention has excellent mechanical stability. When the product is directly applied to a cathode electrode for water electrolysis hydrogen production, the destructive effect of gas impact on the structural stability of an active phase of the electrode under the industrial large-current long-time service condition can be relieved, the mechanical stability of the electrode is remarkably improved, and therefore the service life of the electrode is prolonged, and the water electrolysis cost is reduced.

The invention discloses a sound-insulation antibacterial polyurethane foam board. The sound-insulation antibacterial polyurethane foam board comprises the following components in parts by weight, 80-95 parts of isocyanate, 65-75 parts of a polyester polyol, 14-20 parts of corn starch, 3-6 parts of nano foam glass, 2-5 parts of toughening fiber, 1-3 parts of a foam stabilizer, 2-6 parts of a physical foaming agent, 4-8 parts of nano silver-loaded zeolite, 1-3 parts of nano zinc oxide, 1-3 parts of a surfactant and 1.2-2.5 parts of a flame retardant. The sound-insulation antibacterial polyurethane foam board provided by the invention has excellent sound insulation property, antibacterial property, flame retardance, corrosion resistance and aging resistance, and the service life is obviouslyprolonged.

Robust, flexible, lightweight, low profile enhanced performance dielectric barrier discharge actuators (plasma actuators) based on aerogels / nanofoams with controlled pore size and size distribution as well as pore shape. The plasma actuators offer high body force as well as high force to weight ratios (thrust density). The flexibility and mechanical robustness of the actuators allows them to be shaped to conform to the surface to which they are applied. Carbon nanotube (CNT) based electrodes serve to further decrease the weight and profile of the actuators while maintaining flexibility while insulating nano-inclusions in the matrix enable tailoring of the mechanical properties. Such actuators are required for flow control in aeronautics and moving machinery such as wind turbines, noise abatement in landing gear and rotary wing aircraft and other applications.

The invention discloses biomass porous carbon nanofoam as well as a preparation method and application thereof, and belongs to the technical field of carbon material preparation. The preparation method comprises the following steps: pre-carbonizing a biomass raw material, cleaning, drying and grinding to obtain a product A; mixing the product A with a mixed activating agent, and grinding to obtaina product B; and carrying out high-temperature carbon activation on the product B under the protection of inert gas, and carrying out centrifugal cleaning and drying to obtain the carbon nanofoam. According to the preparation method disclosed by the invention, the mixed activating agent is adopted, so that the preparation method is safe, non-corrosive, environment-friendly and free of pollution,the tedious process of subsequent end product purification is avoided, and the obtained biomass porous carbon nanofoam has an excellent pore structure and can be used as an energy storage material tobe applied to a supercapacitor.

An accelerator pedal assembly including an accelerator pedal attached to the driver's compartment of a vehicle is disclosed. The accelerator is reversibly movable between the neutral or idling position when no pressure is applied to the pedal and an acceleration position when pressure is applied. The assembly includes a compression assembly having a compression chamber with a piston, liquid nanofoam in the chamber, and a geared driver assembly connecting the compression assembly and the pedal. When the pedal is depressed, the driver assembly is activated, forcing the piston into the chamber and causing the force level to rise until it reaches the designed load limit or the threshold. When the pressure on the pedal is relieved, the position of the pedal is immediately reset to the neutral position as the piston is pushed out of the chamber by internal pressure generated by liquid escaping the nanoporous material via the nanopores.

The invention belongs to the technical field of oil extraction in oil fields, and particularly relates to a nano-foam oil-displacing agent and a preparation method thereof. The oil-displacing agent comprises the following components in percentage by weight: 10-45% of an anionic surfactant, 7-15% of a zwitterionic surfactant, 6-12% of oily nanoparticles, 5-10% of a stabilizer, 1-2% of a dispersingagent and the balance of water. The preparation method of the oil-displacing agent comprises the following steps: preparing oily nanoparticles from solid paraffin and isocaprylic acid, dispersing theoily nanoparticles in water, conducting uniform mixing with a surfactant, and adding a stabilizer and water to prepare the nano-foam oil-displacing agent. The nano-foam oil-displacing agent can effectively inhibit gas diffusion, enhance the mechanical stability and viscosity of a liquid film, effectively prevent external heat from being transferred to the inside, reduce the molecular thermal motion rate, greatly reduce the liquid separation rate of a foam liquid film, enhance the stability of foam and further improve the oil-displacing efficiency.

The invention belongs to the technical field of natural gas well drainage, and discloses a nano-foam lifting liquid-draining gas production rod and a preparation method and application. The nano-foamlifting liquid-draining gas production rod comprises a rod body A and a rod body B. The preparation method comprises the following steps: heating and stirring raw material components of the rod body A, pouring the mixed materials into a cylindrical plastic grinding tool, performing cooling and molding; and heating and stirring raw material components of the rod body B, pouring the mixed materialsinto the cylindrical plastic grinding tool, and performing cooling and forming. The application method comprises the following steps that the rod body A and the rod body B are put into a shaft, a large amount of high-water-content foam is generated through a chemical reaction, and therefore accumulated liquid in the shaft is lifted out of a wellhead, and the purpose of liquid draining and repeatedproduction is achieved. Tests show that the foaming force of the nano-foam lifting liquid-draining gas production rod can reach 245 mL / g to the maximum. By means of the rod, a large number of gas wells which do not have conventional foam drainage conditions, such as wells with serious liquid accumulation, wells which are shut down due to flooding, large-water-volume wells and low-pressure small-production wells, can be recovered, the productivity is maintained, and the final recovery efficiency of the gas wells and the final exploitation benefits of gas fields are improved.

A polymeric nanofoam has a continuous polymer phase containing at least one (meth)acrylic-free acrylonitrile-containing copolymer and at least one (meth)acrylic polymer where the concentration of (meth)acrylic polymer is in a range of 5-90 weight-percent of the total continuous polymer phase while the amount of methacrylic copolymer is 50 weight-percent or less of the total continuous polymer phase; the polymeric foam having a porosity of at least 50%, an absence of nano-sized nucleating additives and at least one of the following: (a) a number average cell size of 500 nanometers or less; and (b) an effective nucleation site density of at least 1×1014 sites per cubic centimeter of prefoamed material. The total weight of copolymerized acrylonitrile is in a range of 3-28 weight-percent based on total continuous polymer phase weight. At least one (meth)acrylic-free acrylonitrile-containing copolymer has a higher glass transition temperature than all of the (meth)acrylic polymers.

The invention discloses a preparation method of a SERS substrate of a silver nano / foamed copper material. The preparation method comprises the steps of firstly immersing a cleaned and dried small foamed copper sheet with appropriate specifications into a dilute hydrochloric acid solution for a period of time, then rinsing the foamed copper sheet with absolute ethyl alcohol and deionized water in sequence, immersing the treated foamed copper sheet in a mixed solution of a silver nitrate solution and a PVP solution prepared in advance for shaking, rinsing the foamed copper sheet with the absolute ethyl alcohol and the deionized water again, putting the foamed copper sheet into a vacuum drying oven for full drying, and obtaining a silver nano / foamed copper substrate after the drying is completed. The prepared SERS substrate of the silver nano / foamed copper material is cheap in material, simple in preparation method, high in stability, storable, and relatively high in sensitivity in Raman detection.

A carbon nanofoam composite (such as carbon nanofoam paper) includes a carbon foam of interconnected pores of ˜10-2000 nm in size with nanometric carbon walls having a thickness on the order of 20 nm. In embodiments, the carbon nanofoam composite has electronic conductivity of greater than 20 S / cm and optionally at least ˜100 S / cm.

The invention belongs to the technical field of concrete, and discloses nano foam glass bead concrete capable of being used for a door plate and a preparation method of the nano foam glass bead concrete. The nano-foam glass bead concrete is prepared from the following components: an admixture, nano-foam, a cementing material and water, the admixture comprises polyvinyl alcohol fibers and glass beads. The density of the nano-foam glass bead concrete can be obviously lower than 1000 kg / m < 3 > of foam concrete in the prior art, even as low as 700 kg / m < 3 >, and when the density of the nano-foam glass bead concrete is as low as 700 kg / m < 3 >, the compressive strength of the nano-foam glass bead concrete in 7 days can still reach 4.0 MPa and is far higher than the compressive strength of other foam concrete in the market. In addition, the nano foam glass bead concrete also has good fireproof, heat-insulating and sound-insulating effects.

The invention relates to the field of atmospheric treatment, in particular to a novel electrolysis technology for VOCs. The technology comprises the following three technological processes: an absorption process of the VOCs: continuously introducing VOCs gas, and enabling the VOCs to enter a gathering box to be absorbed by absorption liquid; secondly, an electrolysis process of the VOCs, wherein the gas enters an electrolytic tank of an electrolytic tower through a pipeline, a large number of hydroxyl free radicals with strong oxidizing properties can be generated through an electrolytic reaction of an anode and a cathode under the action of a certain catalyst, the VOCs in a solution can be oxidized into soluble intermediate substances, carbon dioxide, water and other small molecular products by the hydroxyl free radicals, and in addition, a large amount of nanometer foam exists between the cathode and the anode so as to slow down the flowing speed of VOCs in the solution and enhance the electrolysis efficiency of gas; and a circulation process of the absorption liquid: enabling the electrolyzed absorption liquid to pass through a filter plate and a filter screen of the electrolysis tower, and then return to a VOCs gathering box again under the action of a one-way circulating pump for recycling. Thus, the cost of replacing the solution multiple times is reduced.

Polymer foam bodies are made from phosphorus-containing thermoplastic random copolymers of a dialkyl (meth)acryloyloxyalkyl phosph(on)ate. Foam bodies made from these copolymers exhibit increased limiting oxygen indices and surprisingly have good properties. In certain embodiments, the phosphorus-containing thermoplastic copolymer is blended with one or more other polymers and formed into nanofoams.

A facile method is based on a pack-cementation process using large-area copper foil instead of copper powder. By controlling a pack-cementation time and an amount of alloying element (e.g., aluminum), a hierarchical microporous or nanoporous copper can be created. When coated with tin active material, the hierarchical microporous or nanoporous copper can be used as an advanced lithium-ion battery anode. A coin-cell test exhibited a four-fold higher areal capacity (e.g., 7.4 milliamp-hours per square centimeter without any performance degradation up to 20 cycles) as compared to a traditional graphite anode.

The invention discloses a method for preparing a SERS substrate of a silver nanometer / copper foam material. Firstly, immerse the cleaned and dried small pieces of foam copper with appropriate specifications in dilute hydrochloric acid solution for a period of time, and then successively wash them with absolute ethanol, deionized Rinse the foamed copper sheet with water, then immerse the processed foamed copper sheet in the mixed solution of silver nitrate solution and PVP solution prepared in advance to shake, rinse the foamed copper sheet with absolute ethanol and deionized water again, and put it in a vacuum It is fully dried in a drying oven, and the silver nano / copper foam substrate can be obtained after drying. The SERS substrate of the silver nanometer / copper foam material prepared by the invention has the advantages of cheap materials, simple preparation method, strong stability, storage resistance, and high sensitivity in Raman detection.

The invention discloses a device for recovering oil substances in petroleum and coal chemical industry wastewater and an operation method of the device. The device comprises a first water storage tankbody and a second water storage tank body; a rectification filter plate group, a herringbone coalescence plate group, an inclined tube sedimentation plate group and an oil spilling partition plate are sequentially arranged in the first water storage tank body in the wastewater flowing direction, wherein a water collecting area is formed in an area between the inclined tube sedimentation plate group and the oil spilling partition plate, and an oil collecting area is formed by the oil spilling partition plate and the side wall of the box body on the other side; a first water outlet is formed inthe bottom of the water collecting area; the second water storage tank body is provided with a water collection tank and a water distribution tank; a triangular overflow weir is arranged on the sidewall of the water distribution tank; and a composite nano foam part is obliquely laid between the triangular overflow weir and the water collecting tank from top to bottom. According to the invention,floating oil and dispersed oil are recovered through coalescence and static settlement technologies, and separation of emulsified oil and a water body is realized through a nano-membrane assembly system; the whole device is simple in structure and high in treatment efficiency.

A method for producing a polymer nanofoam includes: immersing a polymer material in carbon dioxide at a pressure greater than 5 MPa and a temperature of −30° C. to 40° C. to obtain a carbon dioxide-saturated polymer material, wherein the melt index of the polymer material measured at 230° C. and 3.8 kg is between 0.1 g / 10 min and 8.0 g / 10 min. Thereafter, the carbon dioxide-saturated polymer material is depressurized to atmospheric pressure, and then the carbon dioxide-saturated polymer material is heated to form the polymer nanofoam.

The invention relates to a refrigerator (1) comprising a cold generator and an insulated inner space (8). According to the invention, the inner space (8) is insulated by moulded parts (2, 3, 4, 5, 6) comprising a core consisting of a porous insulating material, and an airtight envelope. The internal pressure of the moulded parts (2, 3, 4, 5, 6) is less than 100mbar, and the insulating material is a nanofoam which has a pore size of less than 100 nanometres.