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1145 results about "Pore diameter" patented technology

Pore diameter. [′pȯr dī‚am·əd·ər] (design engineering) The average or effective diameter of the openings in a membrane, screen, or other porous material.

Silicon-carbon negative electrode material, negative electrode plate, electrochemical device and electronic device

The invention relates to the technical field of electrochemical energy storage devices, in particular to a silicon-carbon negative electrode material, a negative electrode plate, an electrochemical device and an electronic device, and mainly comprises a core material and a coating material, the core material comprises silicon particles, the coating material comprises a porous carbon material doped with indium particles, and the coating material comprises a porous carbon material doped with indium particles. The average pore size of the coating material ranges from 10 nm to 20 nm, and the porosity of the coating material ranges from 35% to 45%. According to the silicon-carbon negative electrode material provided by the invention, the coating material has the effects of buffering and inhibiting silicon volume expansion, so that pulverization of the silicon-carbon negative electrode material is inhibited, and the problem of volume expansion of a battery is solved.
Owner:ZHEJIANG LIWINON ENERGY TECHNOLOGY CO LTD

Positive plate with gradient pores, preparation method of positive plate, lithium ion battery and electric device

The invention discloses a positive plate with gradient pores, a preparation method of the positive plate, a lithium ion battery and an electric device. The positive plate comprises a plurality of coatings which are symmetrically coated on the two sides of a positive current collector, the porosity in the plurality of coatings is increased layer by layer from the coating close to the side of the current collector, and the average pore size of pores is increased layer by layer. The preparation method comprises the following steps: adding a self-sacrifice pore-forming agent into positive electrode slurry, uniformly mixing, coating a carbon-coated aluminum foil with the slurry, drying and rolling, enabling the self-sacrifice pore-forming agent to occupy a certain space, heating a positive electrode plate at a certain temperature, enabling the self-sacrifice pore-forming agent in the positive electrode plate to be decomposed into CO2 and H2O, forming corresponding pores, and forming the positive electrode plate with the pores. According to the invention, gradient gaps are designed on the electrode plate by utilizing the self-sacrifice pore-forming agent, so that the concentration polarization of the thick electrode is relieved, the reaction uniformity and the material utilization rate are improved, the ion transmission performance of the thick electrode is effectively improved, and the dynamic performance of the battery is further greatly improved.
Owner:XIAOGAN CORNEX NEW ENERGY INNOVATION TECHNOLOGY CO LTD

Preparation method of phenolic resin-based porous carbon based on synergistic activation of water vapor and carbon dioxide

The invention relates to the technical field of porous carbon materials, and discloses a preparation method of phenolic resin-based porous carbon based on synergistic activation of water vapor and carbon dioxide. The key point of the method is to construct a multi-dimensional process of'ZIF-8 (at) Ni-MOF derived bifunctional material pore forming-nitrogen / nickel co-doping + dynamic pressure-double-gas synergistic etching + Ti < 3 > C < 2 > T < x > MXene gradient modification '. The MOF derivative material provides regular initial pore channels and active sites, and precise customization of the pore diameter of 0.7-50 nm is realized by combining dual-gas characteristic complementation and dynamic pressure regulation and control; and MXene modification synchronously improves the conductivity and the interface bonding force. The micropore rate is greater than or equal to 88%, the specific surface area is greater than or equal to 2200m < 2 > / g, the total pore volume is greater than or equal to 1.3 cm < 3 > / g, and the process is free of chemical waste liquid pollution. When the material is applied to a lithium battery silicon-carbon negative electrode, the capacity retention rate after 500 cycles is greater than or equal to 85%, and the industrialization value is high.
Owner:GUAN HAIRUOS NEW MATERIALS TECHNOLOGY CO LTD

Field miniature PVC litter decomposition experiment ring

The invention discloses a field miniature PVC litter decomposition experiment ring which comprises a miniature ring structure, observation opening structures are oppositely formed in the outer surface of the miniature ring structure, a nylon net structure with the pore diameter of 5 mm is glued in an inner cavity of one observation opening structure, a nylon net structure with the pore diameter of 50 microns is glued in the other observation opening structure, and the inner cavity of the other observation opening structure is glued with a nylon net structure with the pore diameter of 50 microns. The top of the outer ring of the miniature ring structure is sleeved with a disassembly and assembly ring, and a cover net structure which is in a stretched state and has the aperture of 50 micrometers is glued to the top of the disassembly and assembly ring. Firstly, the influence of microenvironment interference and physical limitation in the litter decomposition process is solved, and the situation that the decomposition rate deviates from a true value due to litter compaction and rainfall erosion in the environment is avoided; secondly, the problem that a litter mesh bag method changes the feeding preference of soil animals is solved, it is ensured that the decomposition behavior is consistent with the natural state, and finally, due to the fact that the decomposition process is protected by the miniature environment, the influence of human factors and large animals is avoided.
Owner:QIQIHAR UNIVERSITY

Identification method for self-sealing reservoir formation of shallow shale gas

PendingCN121595416APermeability/surface area analysisMicro porosityRock core
The invention discloses a shallow shale gas self-sealing reservoir formation identification method, which comprises the following steps: firstly, carrying out dual-energy CT scanning on a shale full-diameter core sample to obtain DEI values, and the difference of the DEI values embodies different lithologic (physical property) longitudinal change rules, i.e., different shale lithologic grain interlayer interlayers, different shale lithologic grain interlayer interlayers, different shale lithologic grain interlayer interlayers, different shale lithologic grain interlayer interlayers, different shale lithologic grain interlayer interlayers, and different shale lithologic grain interlayer interlayers; the development of the top and bottom plates of the high-quality shale reservoir enables the shale gas to have a self-sealing reservoir forming characteristic; then simulating the adsorbability of the shale gas through laboratory thermal cracking to obtain a shale gas adsorbability rule, and identifying whether the shale gas has a self-sealing reservoir forming characteristic or not. And finally, measuring the distribution rule of the microscopic porosity and the pore diameter through a scanning electron microscope, judging whether the shale layer is a non-or ultra-low permeability layer under the formation temperature and pressure condition or not, and identifying whether the shale gas has the self-sealing reservoir forming characteristic or not. According to the method, the self-sealing reservoir forming of the shale gas is identified in multiple aspects, and the method provides effective technical support for evaluating the favorable layer section of the shale and is of great significance in improving the exploration and development effect of the shale gas.
Owner:PETROCHINA CO LTD

Gas Separation Membrane, Method For Producing Gas Separation Membrane, And Gas Separation Apparatus

A gas separation membrane for separating carbon dioxide includes: a separation layer formed of a polymer material and having a function of selecting and separating carbon dioxide; and a porous substrate including a first porous layer and a second porous layer. The gas separation membrane has a layer thickness T1 of 0.1 μm or more and 10.0 μm or less, an average pore diameter d1 of 10 nm or more and 10,000 nm or less, an aperture ratio A1 of 40% or more and 80% or less, a maximum height roughness R1 of 1 nm or more and 200 nm or less, a layer thickness T2 of 10 μm or more and 1,000 μm or less, a ratio d2 / d1 of an average pore diameter d2 to the average pore diameter d1 of 1.1 or more and 10,000 or less, and a ratio A2 / A1 of an aperture ratio A2 to the aperture ratio A1 of 1.1 or more and 2.0 or less.
Owner:SEIKO EPSON CORP

Titanium fibrofelt composite material and PEM electrolytic tank comprising same

The invention discloses a titanium fibrofelt composite material and a PEM electrolytic tank containing the titanium fibrofelt composite material, and relates to the technical field of PEM electrolytic tanks. The titanium powder mixture is filled in the titanium fibrofelt base material on one side of the second surface of the titanium fibrofelt base material, and the particle size of the first titanium powder, the particle size of the second titanium powder, the mass ratio of the first titanium powder to the second titanium powder, and the porosity and the average pore size of the titanium fibrofelt base material are controlled to be within a proper range; the titanium fibrofelt composite material has the advantages that the titanium fibrofelt base material can be well filled with the titanium powder, and a pore structure with proper pore diameter and pore diameter distribution can be formed in the titanium fibrofelt base material, so that when the titanium fibrofelt composite material is used as an anode gas diffusion layer of a PEM electrolytic tank, the cooperative transmission effect of water and oxygen is good, the mass transfer loss in the operation process of the electrolytic tank is low, and the service life of the electrolytic tank is prolonged. The internal temperature of the electrolytic tank is easy to control.
Owner:GUANGDONG GUOHONG HYDROGEN ENERGY TECH CO LTD

Powder containing porous tertiary particle, and producing method thereof

To provide porous particles capable of more effectively exhibiting performance of an active component.SOLUTION: A powder of porous tertiary particles, which are composed of aggregates of porous secondary particles is provided, where the average particle diameter of the powder is in the range of 0.1 to 5.0 mm, and in the pore size distribution of the powder, a first peak exists in the range of pore diameters of 5 nm or more and less than 100 nm (PdR1), and a second peak exists in the range of pore diameters of 100 nm or more and 10,000 nm or less (PdR2). When the pore diameter of the first peak is Pd1, the total pore volume (PV1) of pores with diameters of 0.75×Pd1 or more and 1.25×Pd1 or less accounts for 60% or more of the total pore volume of pores with diameters less than 100 nm (PVR1). When the total volume of pores with diameters less than 100 nm is defined as the first total volume (PVR1) and the total volume of pores with diameters of 100 nm or more is defined as the second total volume (PVR2), the value of PVR1 / (PVR1+PVR2) is in the range of 0.2 to 0.6.SELECTED DRAWING: Figure 1
Owner:JGC CATALYSTS & CHEMICALS LTD

High-temperature composite phase change heat storage material and preparation method thereof

The invention discloses a high-temperature composite phase change heat storage material and a preparation method thereof, and belongs to the technical field of composite phase change heat storage materials. The composite phase change material comprises a matrix and a phase change material, the base body is porous ceramic, and the porous ceramic comprises a lining with a porous structure and a surface layer with a porous structure; compared with the pore diameter of the lining, the pore diameter of the surface layer is smaller; the high-temperature salt in a molten state can enter the inside through small holes in the surface layer; the surface layer can avoid leakage of high-temperature salt in a molten state, and the lining provides a storage and phase change space for the high-temperature salt; the porosity of the lining is larger than that of the surface layer, and the phase change material comprises high-temperature salt.
Owner:NANJING TECH UNIV

Filtration treatment method, and porous film

To provide a fluid filtration treatment method which prevents a failure of filtration and a remarkable decrease in filtration speed, even when filtration of fluid is performed at high temperature, and a porous film which is preferably used in the filtration treatment method.SOLUTION: In a filtration treatment method for filtering fluid at 25°C or higher by a porous film, a polyimide resin porous film which has a communication hole and an average pore size of 0.3 μm or more, or a polyamide-imide resin porous film is used as a porous film.SELECTED DRAWING: None
Owner:TOKYO OHKA KOGYO CO LTD

Aerogel film with continuous gradient pore structure as well as preparation method and application of aerogel film

The invention provides an aerogel film with a continuous gradient pore structure and a preparation method and application thereof.The preparation method comprises the steps that a pre-crosslinking solution containing a polymer nanofiber suspension, a sodium alginate solution, a polyethyleneimine aqueous solution and a crosslinking agent is sprayed to a temperature-conducting substrate with the initial temperature ranging from-20 DEG C to-15 DEG C at high pressure; and freeze-drying to obtain the aerogel film with the continuous gradient pore structure. The aperture of the aerogel film is gradually increased from bottom to top, and the range of the aperture is mainly 1-110 [mu] m. The aerogel film is placed in a filter membrane clamp, so that a solution to be filtered passes through the aerogel film according to the sequence of'macropore-mesopore-micropore ', the aerogel film is used for intercepting and recycling particles with different sizes, such as micro-plastics, and high water flux and high rejection rate are both considered. The pore size of the aerogel film can be changed by adjusting the temperature of the temperature-conducting substrate; the prepared aerogel film improves the trade-off effect in the existing filtration separation technology, and has a wide market prospect.
Owner:WUHAN TEXTILE UNIV

Solid-state battery, preparation method thereof and power utilization device

The invention relates to a solid-state battery and a preparation method thereof and a power utilization device, the solid-state battery comprises a positive electrode layer, a negative electrode layer, a functional layer arranged on at least one surface of the negative electrode layer and a solid electrolyte layer arranged between the functional layer and the positive electrode layer, the functional layer comprises a porous graphene material, the porosity of the single-sheet porous graphene material is 3-9%, and the porosity of the single-sheet porous graphene material is 3-9%. The average pore diameter of the porous graphene material is 0.2 nm to 15 nm; under the condition that the SOC of the solid-state battery is less than or equal to 10%, the mass content of the porous graphene material in the functional layer is 91%-100%, so that the cycle performance of the solid-state battery can be improved.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD

Road snow melting device and preparation method and application thereof

The invention relates to a road snow melting device as well as a preparation method and application thereof. The road snow melting device comprises a stable base layer and a thermal resistor, the stable base layer comprises an energy storage body, and the energy storage body can play a structure supporting role; the energy storage body is connected with external electric energy and the thermal resistor through wires. The preparation method of the energy storage body comprises the following steps: preparing cement-based printing slurry; filling the cement-based printing slurry into a 3D printing device, and stacking layer by layer to form a printing body; curing, maintaining, trimming and drying the printing body, and immersing the printing body into a soluble alkali / salt solution to obtain a cement-based electrolyte; a soluble alkali / salt solution is dropwise added to the surface of the electrode, then the electrode and the cement-based electrolyte are stacked and assembled, and an assembly is obtained; sealing and packaging the assembly body to obtain an energy storage body; a printing interlayer interface of the cement-based electrolyte has a directionally arranged pore structure, the pore diameter is 0.5-20 microns, and the porosity is 10-50%; and the hole orientation of the hole structure is consistent with the ion migration direction between the electrodes.
Owner:CHINA BUILDING MATERIALS ACADEMY CO LTD

A silica-alumina material, its preparation and a low-fouling, high-activity heavy oil conversion catalytic cracking catalyst

The present invention belongs to the technical field of catalytic materials and relates to a silicon-aluminum material, its preparation and a low-coking, high-activity heavy oil conversion catalytic cracking catalyst. The silicon-aluminum material has an anhydrous weight chemical formula of (0-1)Na2O·(15-50)Al2O3·(85-50)SiO2, a most probable pore diameter of 10-100 nm, and a specific surface area of ​​150-600 m 2 / g, a pore volume of 0.5-1.5 ml / g, and a pore volume of pores with a pore diameter greater than 10 nm accounting for 70%-98% of the total pore volume. Its preparation method comprises the steps of adding an alkaline silicon source to an acidic aluminum source, contacting with a base, and washing. The low-coking, high-activity heavy oil conversion catalytic cracking catalyst contains the aforementioned silicon-aluminum material and an in-situ crystallized Y-type molecular sieve. The catalytic cracking catalyst has good coke selectivity.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Negative electrode material and battery

Provided in the present application are a negative electrode material and a battery. The negative electrode material comprises graphite and an organic polymer material located on the surface and / or inside the graphite. The negative electrode material comprises a metal element, and the metal element comprises at least one of lithium, sodium, potassium and aluminum; and on the basis of the total mass of the negative electrode material being 100%, the mass content of the metal element is 1300-4400 ppm. The negative electrode material is provided with pores, and the volume ratio of the pores having a pore diameter in the range of 5-35 nm in the total pore volume is 15-30%. The negative electrode material provided in the present application can comprehensively improve the lithium-ion transmission kinetics, the initial coulombic efficiency and the cycle performance.
Owner:BTR NEW MATERIAL GRP CO LTD

Cigarette environment-friendly degradable wrap paper with self-cleaning and oil-proof functions and preparation method thereof

The invention discloses environment-friendly degradable forming paper with self-cleaning and oil-proof functions for cigarettes and a preparation method of the environment-friendly degradable forming paper. The forming paper is composed of bamboo pulp base paper, a composite oil adsorption resisting layer and a biological source super-hydrophobic coating. In the middle layer, polylactic acid emulsion is matched with diatomite and activated carbon to form a microporous network, and the pore diameter peak value is 50-150 nm to inhibit oil seepage; the outer layer is formed by compounding vegetable wax, AKD, chitosan and double-particle-size SiO (10-20 nm and 120-280 nm), and surface layer particle enrichment and a thickness-direction asymmetric structure are achieved through wet stacking and wet continuous coating and double-section flash evaporation drying. The structure has the advantages of low surface energy, high hydrocarbon contact angle and good wear-resistant adhesion while keeping degradability and air permeability, and is suitable for the antifouling and cleaning requirements of cigarette appearances.
Owner:浙江华丰纸业科技有限公司

Secondary battery and electric device

The application provides a secondary battery and a power utilization device, and relates to the field of batteries. The secondary battery comprises a positive electrode sheet, a negative electrode sheet and a separator film, wherein the positive electrode sheet comprises a positive electrode current collector and a positive electrode film layer arranged on at least one side surface of the positive electrode current collector, the compaction density of the positive electrode film layer is 2.0 g / cm 3 to 3.0 g / cm 3 ; the negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer arranged on at least one surface of the negative electrode current collector, the compaction density of the negative electrode film layer is 1.4 g / cm 3 to 1.85 g / cm 3 ; and the separator film comprises a base film, the thickness of the base film is 4 to 12 mu m, and the base film is provided with nano-pores with an average pore diameter of 10 to 300 nm. The secondary battery has high energy density and improved safety performance.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD

Negative active material, negative plate and battery

The invention relates to the technical field of batteries, in particular to a negative active material, a negative plate comprising the negative active material and a battery. The negative electrode active material comprises silicon-carbon composite particles, the silicon-carbon composite particles comprise closed pores and open pores, the open pores comprise first open pores and second open pores, the pore diameter of the first open pores is d1, the pore diameter of the second open pores is d2, d1 is greater than or equal to 0.26 nm and less than 0.365 nm, and d2 is greater than or equal to 0.365 nm; the total volume of the first open pores is 0.001 cm < 3 > / g to 0.15 cm < 3 > / g; the total volume of the second open pores is 0.0001 cm < 3 > / g to 0.05 cm < 3 > / g; and the total volume of the closed pores is 0.001 cm < 3 > / g to 0.35 cm < 3 > / g. The negative electrode active material disclosed by the invention has relatively high ionic conductivity and electronic conductivity and relatively high structural stability while relatively high gram volume is ensured. Comprising the negative electrode active material disclosed by the invention can give consideration to relatively good rate capability, conductivity and cycling stability.
Owner:ZHUHAI COSMX BATTERY CO LTD

Composite material for use as a catalyst

Herein is described a composite material, the composite material comprising composite 5 particles comprising particles of a mesoporous carbon support material having dispersed on their surfaces noble metal nanoparticles and / or noble metal-M alloy nanoparticles and optionally particles of the elemental metal M or metal oxide MOy, wherein y is >0 to a stoichiometric value of the metal oxide, wherein M is a less noble metal than the noble metal, wherein the composite particles have a BJH average pore diameter of from 2 to 0 50 nm and a particle size D90, as measured by laser diffraction and volume distribution, of 10 µm or less.
Owner:RECATALYST RAZVOJ PROIZVODNJA IN PRODAJA KATALIZATORSKIH KOMPOZITOV D O O

Negative electrode sheet and preparation method therefor, battery, and electric device

A negative electrode sheet and a preparation method therefor, a battery, and an electric device. The negative electrode sheet comprises a current collector and a negative electrode active layer arranged on at least one surface of the current collector, wherein the negative electrode active layer comprises a negative active material and a molecular sieve, and the pore diameter D of the molecular sieve satisfies: D≤10 nm. When the negative electrode sheet is used for preparing a battery, the fast-charging performance and cycling stability of the battery can be improved.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD

Kraft paper and paper sack manufactured therefrom

A kraft paper having a pulp according to ISO 536 of between 60 g / m2 and 120 g / m2, a density of between 680 kg / m3 and 720 kg / m3, and a tensile strength index in the machine direction according to ISO 1924-3 of between 79 kNm / kg and 98 kNm / kg, the kraft paper optionally having a coating and / or an auxiliary element on at least one side. The kraft paper is made of a pulp having an average pulp fibre length of 2.2 mm to 2.7 mm with a minimum pulp content of at least 96% wt. %; a pore volume of the uncoated kraft paper is between 200 μl / g and 220 ml / g; in the thickness direction of the paper, there are regions of different porosities; and at least one region has pores with a pore diameter of less than or equal to 0.3 μm. The invention also relates to a paper sack.
Owner:MONDI AG

Accurate prediction method for foundation pit engineering cast-in-place pile concrete dosage

The invention relates to the technical field of data processing, and discloses a method for accurately predicting the concrete dosage of a cast-in-place pile in foundation pit engineering. The method comprises the following steps: collecting the pore-forming arrival time of each depth section of an initial calibration pile group, the soil layer type, the slurry density and the actual concrete dosage to establish a database, calculating the exposure duration of a hole wall, and establishing a pore diameter expansion coefficient time sequence evolution relationship of soil layer classification through power function fitting; and obtaining the soil layer type of each depth section of the to-be-predicted pile and the estimated exposure duration, substituting into the evolution relationship, and accumulating to obtain the total predicted concrete dosage. According to the method, the soil layer classification time sequence evolution relation of the hole diameter expansion coefficient along with the hole wall exposure duration is established, and the mud density correction term and the dynamic parameter updating mechanism are introduced; the technical problems that an existing cast-in-place pile concrete dosage prediction method cannot accurately reflect the hole wall state time-varying characteristic, ignores the soil layer differential response rule and lacks the construction process self-adaptive calibration capacity are solved.
Owner:ZHEJIANG HONGCHUANG GEOLOGICAL TECH CO LTD

Lightweight thermal-insulation cement-based composite material and preparation method thereof

The invention discloses a lightweight heat-insulation cement-based composite material, and relates to the technical field of cement-based composite materials, the lightweight heat-insulation cement-based composite material comprises the following material components by weight: 40-60 parts of a cement matrix, 20-35 parts of a lightweight aggregate, 5-12 parts of a polymer modifier, and 0.5-0.3 part of a functional additive, the cement matrix is sulphoaluminate cement or Portland cement, and the functional additive is a water-based composite material. The lightweight aggregate comprises hollow glass beads with the particle size of 0.1-0.5 mm, expanded perlite with the particle size of 0.5-2 mm and surface modified aerogel particles, the aerogel particles are silicon dioxide aerogel or silicon carbide aerogel, the surface area of the aerogel particles is 700-600 m / g, the pore diameter of the aerogel particles is 40-50 nm, the polymer modifier is acrylate-styrene copolymer emulsion, and the particle size of the polymer modifier is 1-10 m / g. The solid content of the acrylate-styrene copolymer emulsion is 50-45%, the glass transition temperature of the acrylate-styrene copolymer emulsion is-10 DEG C to 15 DEG C, and the functional additive comprises a cellulose ether thickener, a polycarboxylate superplasticizer and a nano aluminum oxide dispersion liquid.
Owner:BEIJING QIANXING NEW MATERIAL TECHNOLOGY CO LTD

Anti-Oxidant Repair Ganoderma Lucidum Extract and Preparation Method Therefor

The present invention relates to the technical field of preparation of food and cosmetic raw materials. Disclosed are an antioxidant repair Ganoderma lucidum extract and a preparation method therefor. The preparation method comprises: mixing crushed fruit body of Ganoderma lucidum with pure water, and heating and dynamically extracting to obtain a crude extract; standing the obtained crude extract, naturally settling, filtering a supernatant by using a screen mesh, and collecting a crude filtrate; using a disc stack centrifuge to perform secondary impurity removal on the obtained crude filtrate so as to obtain a filtrate; performing fine filtration by using a ceramic membrane having a pore diameter of 400-1200 nm, and collecting a permeate; and finally, concentrating and drying to obtain an antioxidant repair Ganoderma lucidum extract. The preparation method of the present invention is simple to operate and low in cost, and has the advantage of large scale. The finished product is high in controllability and stability, and the Ganoderma lucidum extract which is wide in application and good in effect can be provided for the industries of food, health food, and cosmetics.
Owner:GUANGDONG YUEWEI EDIBLE FUNGI TECH

Two-component sweating type fiber reinforced phenolic aerogel composite material and preparation method thereof

ActiveCN121736367APhase change enthalpyPolymer science
The invention relates to the technical field of fiber reinforced resin-based composite materials, in particular to a two-component sweating type fiber reinforced phenolic aerogel composite material and a preparation method thereof. The method comprises the following steps: (1) modifying phenolic resin; (2) preparing a phenolic resin pregel solution; (3) impregnating the fiber reinforcement; (4) gel curing; (5) drying; (6) filling with an inorganic phase change agent; and (7) filling with an organic phase change agent. The phenolic aerogel is prepared by taking the phenolic resin modified by hot acid treatment as a raw material, so that the curing crosslinking degree of the phenolic resin can be effectively improved, and the skeleton and pore diameter of the aerogel can be refined. According to the invention, the inorganic phase change agent and the organic phase change agent with high phase change enthalpy values are sequentially introduced into pores of the phenolic aerogel, and the hierarchically distributed binary phase change agent can be subjected to solid-liquid-gas phase change in sequence from outside to inside in a high-temperature environment, so that the composite material has comprehensive properties such as ultrahigh temperature resistance, long-term efficient heat insulation and high mechanical strength.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Sound absorption and insulation coating as well as preparation method and application thereof

The invention provides a sound-absorbing and sound-insulating coating as well as a preparation method and application thereof. The sound-absorbing and sound-insulating coating comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 10 to 50 parts of epoxy modified polyurethane, 0.5 to 15 parts of SiO2 aerogel slurry, 0.2 to 20 parts of first hollow glass beads, 0.2 to 15 parts of second hollow glass beads, 1 to 10 parts of dispersing agents, 0.05 to 2 parts of thickening agents, 1 to 30 parts of pigments and fillers, 1 to 30 parts of solvents and 1 to 15 parts of auxiliary agents, and the component B is a curing agent. The first hollow glass beads and the second hollow glass beads have porous structures, the aperture size of the first hollow glass beads is 2-200 [mu] m, the aperture size of the second hollow glass beads is 0.5-2 mm, and the aperture size of the SiO2 aerogel is 1-200 nm. According to the present invention, the coating material has the multi-stage combined porous structure of 1-200 nm nano-scale micropores, 2-200 [mu] m micron-scale pores and 0.5-2 mm macropores, such that the porous materials with different pore diameters have good sound absorption and sound insulation effects in different frequency ranges.
Owner:CHINA SHIPBUILDING INDUSTRY CORPORATION NO725 RESEARCH INSTITUTE

Graphite material and preparation method and application thereof

The invention discloses a graphite material and a preparation method and application thereof, and belongs to the technical field of carbon materials and energy storage. The graphite material provided by the invention comprises a first pore region and a second pore region, the second hole area is located outside the first hole area; the aperture of the first hole region is less than or equal to 15nm; the aperture of the second hole area is larger than 15 nm and smaller than or equal to 50 nm. The graphite material has the gradient pore structure of the first pore region and the second pore region, and the pore structure is reasonable, so that the graphite material has relatively high crystal orientation degree, the ion diffusion energy barrier is effectively reduced, and the fast charging performance of the graphite material under high magnification is greatly improved.
Owner:ZHEJIANG ZEEKR INTELLIGENT TECH CO LTD +2

High-internal-phase emulsion foam material as well as preparation method and application thereof

The invention provides a high-internal-phase emulsion foam material as well as a preparation method and application thereof, and the preparation method comprises the following steps: under a certain pressure, starting microwaves at intervals for multiple times to enable a high-internal-phase emulsion to be subjected to a curing reaction, so as to obtain the high-internal-phase emulsion foam material. According to the method, the curing efficiency can be improved and the curing reaction can be stably carried out by utilizing intermittent microwaves under a certain pressure, the uniformity and consistency of the curing degree are relatively excellent, and the pore diameter uniformity of the obtained high-internal-phase emulsion foam material is relatively high.
Owner:SHENZHEN NANKE NEW MATERIALS TECH CO LTD

Separator and zinc secondary battery

This separator is used in a zinc secondary battery. The separator comprises an inorganic compound in which pores are formed. The average pore diameter of the inorganic compound is at least 0.3 nm and at most 10 nm. When a liquid tank in which two tubes each having an inner diameter of 6 mm protrude upward, which is partitioned into two chambers by a separator having a diameter of 26 mm, and which is filled with a 6M KOH aqueous solution is used as a measurement device, the liquid permeation amount measured 168 hours after the liquid level difference of the tubes is set to 70 cm is at least 0.05 mL and at most 5 mL.
Owner:NGK INSULATORS LTD

Preparation method of high-load electrode with vertical pore channel structure and battery

The embodiment of the invention provides a preparation method of a high-load electrode with a vertical pore channel structure and a battery, which comprises the following steps: grinding and premixing carbon fluoride and a conductive carbon material in proportion, adding a binder, carrying out high-speed ball milling to obtain fiberized powder, and rolling to prepare an electrode material, thereby obtaining the high-load electrode with the vertical pore channel structure. Compounding the carbon fluoride with a current collector through hot rolling to obtain a positive pole piece; and finally, carrying out laser pore-forming treatment on the positive pole piece to obtain the high-load carbon fluoride electrode with a vertical pore channel structure. The pore diameter of the pore channel structure is 10-100 [mu] m, the pore pitch is 1-10 times of the thickness of the electrode material, the pore depth is 50-100% of the thickness of the electrode material, the ion tortuosity of the electrode is effectively reduced and the ion transmission efficiency is improved by constructing a vertical pore channel, meanwhile, high-energy laser induces an in-situ defluorination reaction on the pore wall to generate a high-conductivity sp2 carbon phase, and the conductivity of the electrode is improved. And the limitation of sacrifice conductivity of a mechanical pore-forming technology is broken through.
Owner:XIANGTAN UNIV +1