18 results about "Nanofoam" patented technology

The invention provides a Ru / RuO2 nano foam enzyme as well as a preparation method and application thereof, and belongs to the technical field of nano enzymes. The preparation method of the Ru / RuO2 nano foam enzyme comprises the following steps: uniformly mixing graphene, a ruthenium precursor and a solvent, carrying out reflux reaction, and collecting a solid product A; and mixing the solid product A and the molten salt 1, grinding, adding into the molten salt 2 in a molten state, preserving heat, and cooling, washing and drying after the heat preservation is finished to obtain the Ru / RuO2 nano foam enzyme. The preparation method disclosed by the invention does not need a tight inert atmosphere and a complex calcining process, and is simple; the colorimetric sensing method for glucose detection based on the nano-enzyme has extremely low detection limit, shows high specificity and sensitivity, and is suitable for accurate glucose detection.

The present invention provides a medium-entropy oxide nanofoam enzyme and its preparation method and application, which belongs to the field of nanozyme technology. The preparation method of the medium-entropy oxide nanofoam enzyme comprises the following steps: nickel salt, iron salt, manganese salt, urea and molten salt 1 are mixed with a grinding aid and then ground to obtain a mixture A; the mixture A is added to a molten salt 2 in a molten state, and then cooled to room temperature, and finally washed and dried to obtain the medium-entropy oxide nanofoam enzyme. In the low-high temperature molten salt assisted calcination method of the present invention, the use of low-high temperature molten salt effectively inhibits the agglomeration of the entropy oxide in FeNiMnO4 during the preparation process, forming a nano-foam structure. The colorimetric sensor constructed based on the FeNiMnO4 medium-entropy oxide nanofoam enzyme exhibits excellent detection performance, and its detection limit (LOD) can be as low as 0.98mU / mL, while also having excellent stability.

One aspect of the invention relates to a household refrigeration appliance component (10) having an outer housing (12) and an insulating body (20) which has a nanofoam part (21) arranged in the outer housing (12), characterized in that the nanofoam part (21) is arranged without a casing and / or without evacuation in a cavity (15) which is delimited by the outer housing (12), and / or is arranged with a precise fit in the cavity (15) and / or the nanofoam part (21) is arranged directly adjacent to inner sides (16, 17) of the outer housing (12). Further aspects of the invention relate to a household refrigeration appliance (1) and a method.

The application provides a foam stabilizer raw material system, a method for preparing a nano stable foam agent, the nano stable foam agent and application. The raw material system comprises inorganic nanoparticles, an organic monomer, an initiator, a catalyst and a hydrophobic modifier; wherein the organic monomer has an electrically neutral hydrophilic group. According to the technical scheme of the application, the foam stabilizer prepared from the system is composed of nanoparticles, which not only have hydrophobic groups and can have hydrophobic interaction with the tail of a foaming agent, but also have electrically neutral hydrophilic polymer groups on the particles, which can play a role in temperature resistance and salt resistance on one hand; on the other hand, compared with some anionic polymers, such as 2-acrylamido-2-methylpropane sulfonic acid sodium polymer, the electric charge repulsion with the head group of a surfactant can be reduced or avoided, the adsorption of the nanoparticles on the gas-liquid interface is promoted, and then the stability of the foam is improved.

The invention relates to a sensitive material based on a nano-foam structure and an electrochemical hydrogen sulfide gas sensor, and a preparation method of the sensitive material based on the nano-foam structure comprises the following steps: S1, weighing Co salt and Fe salt, and dissolving the Co salt and the Fe salt in water to form a mixed solution; s2, adding glucose and urea into the mixed solution, and stirring until the glucose and the urea are dissolved to obtain a clear solution; s3, baking the clarified solution, so that the glucose and the urea are subjected to a Maillard reaction, and gas is released to form a porous nano-foam structure; s4, the porous foam is annealed so that the Co salt and the Fe salt can react, then the porous foam is naturally cooled to the room temperature after annealing, the cobalt ferrite nano-foam sensitive material is obtained, the chemical formula of the cobalt ferrite nano-foam sensitive material is Co2FeO4, and the cobalt ferrite nano-foam sensitive material is used as a sensitive material of an electrochemical H2S gas sensor. According to the embodiment of the invention, high-sensitivity, low-detection-limit, high-selectivity and high-stability detection of H2S can be realized.

To provide a new method for producing a resin foam, and a resin foam produced by the method.SOLUTION: A method for producing a nano foamed polymer includes: arranging a first resin where first gas is dissolved under atmosphere containing first gas and second gas reducing surface tension of the first resin (step S10); then performing pressurization of raising a partial pressure of the first gas and a partial pressure of the second gas in the above-described atmosphere (step S20); and then lowering the partial pressure of the first gas and the partial pressure of the second gas in the above-described atmosphere (step S30). In the step S20, for example, the pressure of the atmosphere is raised, and in the step S30, for example, the pressure of the atmosphere is lowered.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of electro-catalytic oxygen reduction materials, and particularly relates to a nano foam metal iron-based composite material and a preparation method and application thereof. The invention provides a preparation method of a nano foam metal iron-based composite material, which comprises the following steps: mixing an iron source, an additive, a carbon source and coke to obtain a precursor; performing heat treatment and activation to obtain a nano foam metal iron-based composite material; the adding element of the additive comprises at least one of nickel, copper, calcium and silicon. The nano foam metal iron-based composite material provided by the invention has high catalytic activity and high stability; the preparation method is simple and low in raw material cost.

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 utility model discloses a kind of nano bubble sand mixing devices for reinforced foam fracturing fluid, including nano foam fracturing fluid sand mixing device and the nano bubble generator of being communicated by gas guide pipe, the manifold of external water-based fracturing fluid is communicated and arranged in the top of nano foam fracturing fluid sand mixing device, the inside of nano foam fracturing fluid sand mixing device is equipped with stirring structure, the axis of gas guide pipe is 30 °-45 ° inclined setting with the lateral wall of nano foam fracturing fluid sand mixing device.In the scheme, nano foam fracturing fluid sand mixing device and nano bubble generator are directly communicated by gas guide pipe, cooperate the manifold of external water-based fracturing fluid and form integrated online sand mixing structure, realize that fracturing base fluid and gas directly generate nanometer stable foam in nano foam fracturing fluid sand mixing device and complete sanding operation simultaneously, make sand-carrying fluid keep high sand concentration and foam stability, simplify the multistage processing flow of traditional foam fracturing.

A polymeric nanofoam includes a plurality of nanocells, wherein the average diameter of the nanocells is less than 200 nm, and the number of nanocells is higher than 1013 cells / cm3. The polymeric nanofoam is formed of polymethyl methacrylate (PMMA) and has a flat area greater than 50 cm2, a thickness greater than 5 mm, and a relative density less than 0.5. A method for fabricating the polymeric nanofoam is also disclosed herein.

The invention discloses a high-concentration micro-nano foam preparation device and a preparation method thereof.The device comprises a liquid storage tank, a conveying pump, a micro-nano foam preparation unit and a micro-nano foam separation and recovery unit, a first bottom barrier plate is arranged in the liquid storage tank, and the micro-nano foam preparation unit is connected with the conveying pump and arranged on the side edge of the liquid storage tank; and the micro-nano foam separation and recovery unit is integrated at the upper part of the liquid storage tank and comprises a second barrier plate, a micro-nano foam collection tank, a foam overflow plate and a foam discharge liquid return pipe. The micro-nano foam separation and recovery unit is arranged, foaming liquid separated out through the foam overflow plate and the foam discharge liquid return pipe by means of the gravity liquid discharge effect is guided back to the liquid storage tank, gas-liquid separation is effectively achieved, and the dryness and concentration of discharged foam are remarkably improved. The device is compact in structure, low in energy consumption, large in dry density and suitable for industrial large-scale production, and the particle size of the prepared micro-nano foam is concentrated at 1-10 microns.

Catalyst compositions, methods of making a bimetallic nanofoam catalyst composition, and methods of catalyzing a reaction are described. In an example, the catalyst comprises a nanofoam comprising plurality of intertwined nanowires comprising two or more metals. In an example, the nanofoam comprises a three-dimensional interconnected nanonetwork comprising the plurality of intertwined nanowires. In an example, the nanofoam is an aerogel comprising the plurality of intertwined nanowires. In an example, the nanofoam is self-supported, such as where the catalyst composition does not comprise a substrate supporting the nanofoam.

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 provides medium-entropy oxide nano foam enzyme as well as a preparation method and application thereof, and belongs to the technical field of nano enzyme. The preparation method of the medium-entropy oxide nano foam enzyme comprises the following steps: mixing a nickel salt, an iron salt, a manganese salt, urea and a molten salt 1 with a grinding aid, and grinding to obtain a mixture A; adding the mixture A into molten salt 2 in a molten state, then cooling to room temperature, and finally washing and drying to obtain the medium-entropy oxide nano foam enzyme. According to the low-high temperature molten salt auxiliary calcination method, in the preparation process, agglomeration of entropy oxide in FeNiMnO4 is effectively inhibited through use of low-high temperature molten salt, and a nano foam structure is formed. The colorimetric sensor constructed on the basis of the entropy oxide nano foam enzyme in FeNiMnO4 shows excellent detection performance, the limit of detection (LOD) of the colorimetric sensor can be as low as 0.98 mU / mL, and meanwhile, the colorimetric sensor has excellent stability.

The invention discloses a foam concrete composite material as well as a preparation method and application thereof, and relates to the technical field of light materials. The foam concrete composite material comprises a foam concrete material and carbon fiber cloth coating the surface of the foam concrete material, the foam concrete material is prepared from the following components in parts by mass: 200 to 500 parts of a cementing material, 3 to 25 parts of polymer fiber, 20 to 40 parts of nano foam and 100 to 500 parts of water. According to the foam concrete composite material, the light characteristic of foam concrete is guaranteed, and meanwhile the compressive strength and durability of the foam concrete composite material are remarkably improved, so that when the foam concrete composite material is used as a building material, the safety is also improved, and the foam concrete composite material is suitable for the field of buildings.

The invention relates to a foam concrete material capable of quickly responding to a dry environment and a prefabricated slab. The high-strength concrete is prepared from the following raw materials in parts by mass: 300 to 600 parts of cement, 150 to 300 parts of blast furnace slag, 20 to 50 parts of anhydrous calcium sulfate, 50 to 200 parts of micro-active aggregate, 7 to 10 parts of polypropylene fiber, 5 to 7 parts of polystyrene fiber, 100 to 300 parts of regenerated micro powder, 0.2 to 1 part of nano foaming agent, 2 to 6 parts of polycarboxylate superplasticizer mother liquor, 10 to 50 parts of AFt seed crystal and 0.1 to 0.2 part of hydroxypropyl methyl cellulose. According to the foam concrete prefabricated slab, part of cement is replaced by the recycled micro powder and the slag, and meanwhile, the micro-active aggregate is compounded with the AFt seed crystal, so that the problem that the shrinkage period of the foam concrete prefabricated slab is long is effectively solved, the utilization rate of solid waste resources is also increased, and the problem that the strength of foam concrete in the prior art is relatively low is solved.

The invention belongs to the technical field of nickel-hydrogen batteries, and provides a foamed nickel positive electrode material for a nickel-hydrogen battery and a preparation method of the foamed nickel positive electrode material. The method comprises the following steps that a foamed nickel sheet is placed in a Ni-NiO precursor solution to be subjected to a reaction and then annealed, and the Ni-NiO heterostructure nano foamed nickel sheet is obtained; under protective gas and hydrogen atmosphere, carbon source gas is introduced, and a Ni-NiO heterostructure nano foam nickel sheet with three-dimensional graphene growing on the surface is obtained; and immersing into a molybdenum source and nickel source mixed solution for reaction, and then drying. The Ni-NiO heterostructure and the graphene have excellent energy storage performance, the Ni-NiO heterostructure, the three-dimensional graphene and the NiMoO4 are combined, process parameters are reasonably controlled, the contact area of an electrode and an electrolyte is increased, the conductivity and the ion diffusion rate of the foamed nickel positive electrode material are obviously improved, and the energy storage performance of the foamed nickel positive electrode material is improved. And the discharge capacity, coulombic efficiency and cycle stability of the nickel-hydrogen battery are remarkably improved.

The application discloses a degradable nanometer foam filter material for cigarettes and a preparation method thereof. The inventor selects whole biomass wood fiber and hydrogel with a nano structure as a filter material matrix to realize complete degradation of the material. The polar functional groups and nano structure of the material are used to realize efficient adsorption of harmful particles in a physical and chemical way, and the original taste of cigarettes is reserved. The wood fiber itself has a natural nanometer tubular structure and shows strong adsorption capacity. The wood fiber is in-situ cross-linked and polymerized with hydrogel with a three-dimensional network structure to form a type, and the wood fiber is wound and interpenetrated to complement each other. The wood fiber is a kind of strong and stable high-efficiency filter material. The toughness and water resistance of the three-dimensional network structure are further improved by boric acid treatment on the wood fiber and the hydrogel. The material in the technical scheme is safer and more environmentally friendly, harmful additives are not added in the processing process, and secondary pollution of the material is avoided.