143 results about "Multiwalled carbon" patented technology

RF absorbing structures include a dielectric layer, such as polycarbonate, and one or more layers of a carbon resistive material, such as carbon ink. The RF absorbing structures can further include one or more layers of a conductive material, such as silver ink.

The invention discloses a building material mine carbon emission metering traceability method, which realizes full-chain accurate metering and credible traceability of carbon emission through multi-process division, multi-source sensing data acquisition, dynamic model correction and block chain traceability technologies. The method comprises the following steps: refining a building material mine production process into five main procedures of mining, raw material processing, calcining / sintering, finished product preparation and transportation, and deploying a multi-source sensor group to collect raw material quality, particle size distribution, energy consumption and waste gas emission data in real time; constructing a multi-layer carbon emission calculation model, and dynamically correcting emission factors in combination with a material balance method, life cycle evaluation (LCA) and a machine learning algorithm; determining a carbon emission distribution coefficient based on the product output proportion and the process contribution degree, and generating a block chain carbon footprint label; coupling a mine restoration carbon sink evaluation and deduction mechanism, and outputting a dynamic net carbon accounting report; and an abnormal emission early warning mechanism is integrated. According to the method, the accuracy of carbon emission metering is remarkably improved, and technical support is provided for building material mine carbon neutralization.

The invention relates to a gradient carbon nanotube fiber needled preform heat dredging ceramic-based composite material and a preparation method thereof. The method includes; preparing a plurality of carbon nano tube fiber web tire layers and carbon nano tube fiber cloth layers which are alternately laminated with the carbon nano tube fiber web tire layers and are compounded by needling, wherein the carbon nano tube fiber web tire layers comprise carbon nano tube fibers and organic fibers, and the content of the organic fibers is gradually changed layer by layer along the thickness direction of the prefabricated body; forming a carbon interface layer by using a carbon source; decomposing the organic fibers through high-temperature treatment to form pores in gradient distribution; and carrying out impregnation and cracking by using a ceramic precursor to obtain the heat-conducting ceramic-based composite material. According to the pure carbon nanotube fiber needled preform prepared by the method, organic fibers are decomposed through high-temperature treatment, pores in gradient distribution are formed while the heat conductivity is improved, closed pores are avoided, carbon interface deposition and ceramic densification are facilitated, mechanics is improved, the preparation period is shortened, and the cost is reduced.

The invention discloses concrete with high salt corrosion resistance and a preparation method of the concrete. The concrete is prepared from 300-400 kg / m < 3 > of cement, 50-150 kg / m < 3 > of slag powder, 1000-1200 kg / m < 3 > of gravel, 650-800 kg / m < 3 > of machine-made sand, 0.5-2 kg / m < 3 > of a modified polycarboxylic acid water reducing agent, 0.005-0.01 kg / m < 3 > of an air entraining agent, 0.05-0.1 kg / m < 3 > of an ion chelating agent, 0.05-0.1 kg / m < 3 > of polyacrylamide, 0.01-0.05 kg / m < 3 > of sodium methyl silicate, 0.1-0.5 kg / m < 3 > of multiwalled carbon nanotube dispersion liquid and 140-160 kg / m < 3 > of water. The preparation method comprises the following steps: stirring and mixing the modified polycarboxylate superplasticizer, the air entraining agent, the ion chelating agent, the polyacrylamide, the sodium methyl silicate and part of the water for mixing to obtain an admixture mixed solution; sequentially putting broken stones, cement, machine-made sand, the admixture mixed solution, the multi-walled carbon nanotube dispersion liquid and the rest of mixing water into a stirrer, and stirring for 2-3 minutes, so as to obtain the concrete with high salt corrosion resistance. The concrete has high salt corrosion resistance in a complex service environment, the service life of a concrete structure is effectively prolonged, and a reliable guarantee is provided for infrastructure construction.

The invention discloses a hydrogel evaporator for generating power by solar evaporation and a preparation method thereof, PVA is dissolved in deionized water to prepare a PVA solution, and then TOCNFs and SLS are added to prepare a polyvinyl alcohol / Tempo oxidized cellulose nanofiber / sodium lignin sulfonate (PTFS) suspension. Adding glutaraldehyde (GA) into the prepared suspension liquid, and adding a phytic acid solution (PA) and a multiwalled carbon nanotube dispersion liquid (CNT) after the suspension liquid is fully mixed, so as to prepare a PTFS hydrogel precursor solution; and directionally freezing the precursor solution by using liquid nitrogen, and finally freeze-drying to obtain the evaporation-power generation integrated low-latent-heat hydrogel evaporator. The prepared evaporator can generate clean water and electric power at the same time, and multi-stage utilization of energy is achieved. And the material also has excellent mechanical properties, is rich in internal water transmission channels, and has better adaptive capacity to the environment. The ultra-high evaporation rate can still be kept under high-intensity sunlight and in a high-concentration saline solution, and the seawater desalination efficiency of the solar evaporator is improved.

The application relates to the technical field of composite materials, and particularly discloses a carbon fiber / epoxy electromagnetic shielding composite material with strong interface bonding and a preparation method thereof, which comprises the following steps: hydrothermal reaction of oxidized carbon fibers O-CF, an organic ligand and an iron source in a solvent, washing and drying of the fibers to obtain MIL-loaded carbon fibers, carbonization treatment to obtain iron-based oxide-loaded carbon fibers dF@CF, vacuum-assisted introduction of epoxy resin into the multilayer carbon fibers dF@CF, and curing to obtain the carbon fiber / epoxy electromagnetic shielding composite material. The organic ligand and trivalent iron ions are used to synthesize a large number of rhombic MILs on the active sites on the surface of the carbon fibers, the MILs are reduced into iron-based oxide nanoparticles after carbonization, the iron-based oxide nanoparticles are closely loaded on the surface of the carbon fibers, the interface bonding performance is improved, the electromagnetic shielding efficiency is increased, and the carbon fiber / epoxy composite material with both the interface and the electromagnetic shielding efficiency is realized.

The invention relates to the technical field of coatings, and discloses a polysilazane-graphene composite electrical equipment insulating and pressure-resistant protective coating and a preparation method thereof. The flame-retardant coating is prepared from the following raw materials in parts by mass: 30 to 50 parts of polysilazane, 3 to 5 parts of telomer, 1 to 3 parts of synergist, 4 to 5 parts of modified silicon dioxide, 4 to 5 parts of modified graphene, 1.5 to 2 parts of multiwalled carbon nanotube, 0.5 to 2 parts of modified zinc oxide, 1 to 2 parts of fluorocarbon surfactant and 130 to 230 parts of tetrahydrofuran. By introducing the telomer, the adhesive force of the coating on a rusty surface is effectively improved, and the properties of high temperature resistance, insulation and pressure resistance, flame retardance, water resistance, ice condensation resistance and the like are enhanced; by introducing the synergist, the modified silicon dioxide, the modified graphene, the multi-walled carbon nanotubes and the modified zinc oxide, the protection capability is further improved. Therefore, the coating disclosed by the invention is excellent in comprehensive protection performance, can meet the long-term operation requirement of power equipment in a complex and severe environment, and is wide in application prospect.

The invention relates to the technical field of coatings, in particular to a photo-thermal hydrophobic coating and application thereof on an asphalt pavement. The photo-thermal hydrophobic coating is prepared from the following raw materials in parts by weight: 1 to 1.5 parts of multiwalled carbon nanotubes, 3 to 4 parts of titanium dioxide, 6 to 7 parts of lauric acid and 100 parts of absolute ethyl alcohol. The anti-icing coating with a rough surface is constructed on the road surface by using the multi-walled carbon nanotubes, titanium dioxide and lauric acid, the anti-icing coating has hydrophobic anti-icing performance and photo-thermal anti-icing performance at the same time, and the effects of inhibiting the formation of road icing and accelerating the thawing of the road icing can be achieved by fully utilizing solar energy. In an extremely low-temperature environment, the coating still can obviously delay the icing of water on the surface of the coating, and has good anti-icing performance; under the condition of weak light, the hydrophobicity of the coating can still play an ice inhibiting role, and all-weather anti-icing and deicing are achieved.

The invention discloses a multi-layer continuously coated mixed electrode material sodium-ion battery and a preparation method thereof, a positive electrode adopts a layered oxide material continuously coated by multi-layer carbon-phosphoric acid ferric sodium pyrophosphate, a carbon-based dispersant adopted in the coating process has the effect of dispersing slurry and also has the effect of coating a carbon source, and wet-process mixed coating is adopted, so that the coating efficiency is greatly improved, and the service life of the battery is prolonged. And the continuity and the uniformity of the coating layer are ensured. The negative electrode adopts a carbon-coated sodium titanium phosphate material, a carbon-based dispersant is still adopted as a carbon source in the coating process, and a secondary sintering method is adopted, so that the obtained negative electrode material is purer in phase, more stable in structure and better in carbon coating effect. And finally, the prepared positive electrode material, the prepared negative electrode material and a non-aqueous electrolyte are assembled into a battery for testing, and a test result shows that the specific capacity of the battery adopting the layered oxide material continuously coated with the multi-layer carbon-phosphoric acid ferric sodium pyrophosphate as the positive electrode is not influenced, and the cycle performance is better.

The invention discloses a high-performance silicon-carbon negative electrode material and a preparation method thereof, and relates to the technical field of lithium ion battery materials, the high-performance silicon-carbon negative electrode material comprises a porous carbon material, the surface of the porous carbon material is successively deposited with a carbon nanotube network and nano silicon, the porous carbon material on which the carbon nanotube network and the nano silicon are deposited is also provided with a secondary outer layer carbon shell and an outer layer carbon shell from inside to outside; according to the invention, double optimization of the silicon-carbon negative electrode material is realized through a unique structural design: (1) the volume expansion effect of nano silicon is relieved through cooperation of the carbon nanotube network and the multi-layer carbon shell; and (2) the migration rate of lithium ions is accelerated by the carbon nanotubes and the multi-layer carbon coated structure, and the prepared silicon-carbon negative electrode material has excellent cycling stability and rate capability.

The invention discloses a low-noise and low-rolling-resistance tire tread and a preparation method thereof, and relates to the technical field of tire production, the low-noise and low-rolling-resistance tire tread comprises a supporting layer and multiphase composite tread rubber; the multiphase composite tread rubber comprises a continuous phase matrix, white carbon black with a two-phase structure, functionalized multiwalled carbon nanotubes, a disilane coupling agent, dynamic crosslinking thermoplastic elastomer particles, zinc oxide, stearic acid, an anti-aging agent, an accelerant and sulfur, and good wear resistance and mechanical strength are kept while the rolling resistance and driving noise of a tire are remarkably reduced.

The invention discloses a preparation method and application of a multi-layer carbon sphere material, a hollow carbon sphere is obtained by a hard template method, silicon dioxide is taken as a core, phenolic resin (RF) is taken as a shell, the silicon dioxide and the phenolic resin are repeatedly and alternately wrapped, and finally the multi-layer hollow carbon sphere can be obtained by carbonization and core removal. The multi-layer carbon spheres with different particle sizes can be obtained by adjusting the particle size of the silicon dioxide, and the layer number of the multi-layer hollow carbon spheres can be adjusted by adjusting the layer number covered by the phenolic resin. By means of reflection and scattering of the hollow structure of the hollow carbon sphere on electromagnetic waves and interface polarization among the multiple shell layers, the multilayer hollow carbon sphere has an excellent absorption effect on the electromagnetic waves. A novel preparation method is provided for the multilayer hollow carbon spheres, single-layer, double-layer and three-layer carbon spheres with different particle sizes are successfully prepared, the synthesis method is simple and convenient, the raw materials are low in price, and the obtained material has wide application prospects in the aspect of stealth technology.

The invention relates to the technical field of rail transit equipment, and particularly discloses a multifunctional inward-bending bow beam for rail transit equipment, which comprises a beam body, connecting end blocks are arranged at the left end and the right end of the beam body, the beam body and the connecting end blocks are integrally formed and are in an inward-bending shape, and the beam body and the connecting end blocks are formed by compounding a plurality of layers of carbon fiber prepregs. A plurality of second penetrating holes are formed in the upper end direction and the lower end direction of the middle portion of the beam body, rectangular holes are formed in the left end direction and the right end direction of the two connecting end blocks, bolt holes are formed in the front ends of the connecting end blocks and communicate with the rectangular holes, a module mounting component is arranged at the middle end of the beam body, and fixing components are arranged at the outer ends of the two connecting end blocks. The module mounting component comprises a connecting sleeve which is in a U shape, and the module mounting component is suitable for a vehicle body structure supporting component of rail transit equipment such as a high-speed train, a light rail and a subway, and has the functions of light weight, high strength, fatigue resistance and dynamic deformation monitoring.

This application discloses an impact buffer structure, which includes an inner support, a buffer layer, and a paint layer. The buffer layer is disposed on the outer surface of the inner support, and the paint layer is disposed on the outer surface of the buffer layer. The buffer layer contains a mesh and multiple layers of carbon fiber balls. This application can improve the buffering capacity of the impact buffer structure and increase its service life.

A device (1) for rapidly transferring thermal energy from a thermal energy source (A) to a destination point (B) at a rate higher than the convection and heat transfer capacity of adjacent means 2 and for capturing said thermal energy point or surface, wherein a thermoelectric conversion means located at the destination point B can convert the thermal energy into electrical energy with zero emissions harmful to the environment and living things. The thermal energy is transferred by a coating 4 composed of a plurality of nanometric layers with atoms forming a regular geometric structure (Figure 1). The present invention also relates to a device for the transfer of thermal energy having multiple layers of carbonaceous material on a planar or non-planar (three-dimensional shape), opaque, transparent or translucent, rigid or semi-rigid substrate of fabric, metallic or non-metallic or flexible material, having flexible but not opaque, transparent or translucent natural or synthetic fibers. The present invention also includes a method for manufacturing a device (10 or 10a) for the rapid transfer of thermal energy. The method comprises at least one deposition step of at least one layer (12, 12a-12b-12c-12d, etc.) of a carbonaceous material having a regular geometric structure on a support substrate (11 or 11a) in an environment (110) of a deposition machine (100), the environment being vacuum-packed under controlled temperature and pressure conditions and isolated from the external environment, the deposition being performed along a direction perpendicular or locally radial to a plane or shape substantially defined by the support substrate (11 or 11a). The present invention also relates to an integrated system for generating electrical energy using said device coupled to a possible generator other than a renewable energy source of thermoelectric generator, photovoltaic and / or thermoelectric-photovoltaic and / or motive power type, all used jointly for the supply of an electrical load.

The utility model discloses an electronic shielding box, specifically relates to electronic shielding equipment technical field, including base, shell, radiating fin and heat pipe, base is fixed installation in the inside wall of shell, the outside wall of shell is fixed connection with radiating fin, heat pipe one end can pass through radiating fin, shell side wall and base in proper order and stretch into the chamber of shell, and the other end can pass through the casing side wall and base. The shell comprises a plurality of carbon fiber prepreg layers and a plurality of graphene layers, the carbon fiber prepreg layers and the graphene layers are fixedly laid in a staggered mode, and the outermost layer and the innermost layer of the shell are the carbon fiber prepreg layers. The box body provided by the utility model is light in weight, has a good heat dissipation effect, and can provide a good working environment and protection for electronic equipment in the equipment.

The invention particularly relates to a polytetrafluoroethylene sealing element material and a manufacturing method thereof. The polytetrafluoroethylene sealing element material comprises the following raw materials in parts by weight: 70-99 parts of modified polytetrafluoroethylene resin, 5-15 parts of glass fibers, 3-10 parts of carbon fibers, 2-10 parts of bronze powder, 0.5-1 part of furan ring-containing thermosetting resin microcapsules, 0.5-2 parts of multiwalled carbon nanotubes, 0-5 parts of a lubricant and 0-3 parts of a functional aid. According to the polytetrafluoroethylene sealing element material disclosed by the invention, the mechanical property, wear resistance and sealing property of a sealing element are remarkably improved by optimizing the types and contents of the filling agent, the lubricating agent and the functional additive, and the sealing element disclosed by the invention is suitable for sealing application in high-temperature, high-pressure and strong-corrosion environments and has a wide market prospect.

The present invention discloses a method for preparing a highly dispersed five-element high-entropy alloy-loaded carbon sponge absorber. First, a high-energy metal hydride (MOF) rich in zinc-based triazole is synthesized as a precursor. A layered porous carbon sponge is then obtained under inert gas and high-temperature heat treatment conditions. Five metal salts are selected and simultaneously reduced with a saturated sodium borohydride aqueous solution and a hydrogen-argon mixture to obtain a high-entropy alloy loaded on a multilayer carbon network structure. This absorber achieves a reflection loss of 35 dB at 2.7 mm and an effective absorption bandwidth of 9.44 to 13.56 GHz, covering the entire X-band.

The present disclosure belongs to the technical field of lithium battery cathode materials, and discloses a preparation method of multiple carbon-coated high-compaction lithium iron manganese phosphate, comprising the following steps: (1) synthesizing a carbon and vanadium co-doped ferromanganese phosphate precursor through a co-precipitation method, sintering, and removing crystal water to obtain an anhydrous ferromanganese phosphate precursor; (2) adding lithium phosphate, a supplemental phosphorus source, an organic carbon source, a dopant and deionized water, and performing ball milling, wet sanding, spray drying and sintering to obtain an intermediate material; and (3) adding deionized water and the organic carbon source, then performing ball milling, sanding, spray drying, sintering and air jet pulverization to obtain multiple carbon-coated high-compaction lithium iron manganese phosphate.

The invention relates to a polypropylene composition as well as a preparation method and application thereof. The polypropylene composition comprises the following components in parts by weight: 58-86 parts of polypropylene, 5-17 parts of conductive carbon black, 3-9 parts of multiwalled carbon nanotubes and 0.5-2 parts of an antioxidant. The surface of the multi-walled carbon nanotube is modified with carboxyl; the mass ratio of the conductive carbon black to the multi-walled carbon nanotubes is (1.5-3): 1. According to the invention, the polypropylene is used as a resin matrix and added into the multi-walled carbon nanotube with the surface modified with carboxyl, and the mass ratio of the conductive carbon black to the multi-walled carbon nanotube is controlled within a specific range, so that the prepared polypropylene composition not only has high electromagnetic shielding effectiveness, but also has high tensile strength retention rate after thermal aging treatment, and the electromagnetic shielding performance of the polypropylene composition is improved. And the thin-wall injection molding requirement can be met.

The invention discloses a preparation method of a multi-layer carbon fiber composite material with an anti-icing function. The preparation method comprises the following steps: preparing hydrophobic silicon dioxide resin mixed dispersion liquid, and then preparing prepreg; a mold is cleaned, a release agent is sprayed, three layers of carbon fiber / epoxy resin prepreg and one layer of modified carbon fiber / epoxy resin prepreg are sequentially put into the forming mold, the face, coated with the hydrophobic silicon dioxide resin mixed solution, of the first composite material is located on the outermost side, mold pressing curing forming is conducted, and finally the composite material laminated plate is obtained through the demolding procedure. The carbon fiber prepreg and the hydrophobic modified prepreg are subjected to hot-pressing preparation, the problem that an existing composite material is insufficient in binding force is solved by controlling the resin amount and reversely infiltrating a hydrophobic structure through the resin, and the influence of hydrophobic modification on the mechanical property of the material is reduced.

The utility model discloses a shock-resistant cable protection pipe connector, which relates to the technical field of protection pipe connectors and comprises a connector, two groups of fixing sheets are fixedly connected to the front end and the rear end of the top of the connector, and a shock-resistant component is fixedly connected to the periphery of the connector. According to the shock-resistant cable protection pipe connector, by arranging the Y-shaped reinforcing ribs, the multiple layers of carbon fiber honeycomb pieces and the carbon fiber arched plates, when the shock-resistant cable protection pipe connector is used, firstly, the interior is protected through the steel shell, internal and external deformation caused by impact force is prevented, meanwhile, after the impact force is inwards transmitted into the pressure bearing layer, external pressure and impact are effectively resisted through the Y-shaped reinforcing ribs, and the service life of the cable protection pipe connector is prolonged. Stress is dispersed, after the carbon fiber arched plates in the supporting layers bear pressure, the pressure is downwards and outwards transmitted to the adjacent multi-layer carbon fiber honeycomb pieces and finally enters the retarding layers, the springs buffer and weaken the pressure, finally, the pressure is transmitted to the high-density sponge, additional impact resistance is provided, and the problem that the impact resistance of the device is poor is solved.

An improved method of maturation of an unaged or partially aged distilled spirit, the method comprising: exposing the spirit to at least one catalytic material consisting of a group selected from: iron oxide nanoparticles, alumina-supported Fe(II) complexes, Pd / C, multiwalled carbon nanotubes, carbon xerogels, carbon based solid acid catalysts, SO42- / TiO2 / γ-Al2O3, an element selected from the group consisting of: columns 4-12 transition metals except for Fe, column 13 boron group, Si, and mixtures thereof; wherein throughout the exposing, the spirit is not being distilled, and the exposing is allowed until level of at least one maturation congener in the spirit attains predetermined desired congener level / s in the spirit.

The invention relates to the technical field of water electrolysis and chlor-alkali industry electro-catalysis hydrogen evolution, in particular to a preparation method of a controllable carbon layer loaded monatomic titanium-based electrode. The method comprises the following steps: (1) respectively placing a solid-phase carbon source and a titanium substrate subjected to acid treatment in a gas inlet and a heating temperature zone of a tubular furnace; (2) introducing inert gas and a certain proportion of hydrogen, heating the tubular furnace to 600-1200 DEG C, and keeping the temperature for 0-300 minutes; after natural cooling, the carbon-coated titanium-based material is obtained; and (3) loading monoatomic single-layer, few-layer and multi-layer carbon-coated titanium-based electrodes on the carbon-coated titanium-based material through a post-deposition method. According to the invention, an acid-resistant substrate material is selected to prepare a carbon-supported monatomic electrode, and through the solution of optimizing a catalytic material, improving growth conditions, increasing the utilization rate of noble metal atoms and the like, uniform distribution and efficient utilization of noble metal atoms on single-layer graphene are expected to be realized, and a high-performance monatomic water electrolysis catalyst is designed and prepared.

The invention discloses elastic anti-aging plastic particles and a preparation method thereof, and relates to the technical field of plastics. The preparation method comprises the following steps: performing in-situ synthesis of cerium dioxide on the surface of a hydroxylated multi-walled carbon nanotube, performing freeze drying treatment to enhance the dispersibility of the multi-walled carbon nanotube, performing carboxyl activation, grafting ethylenediamine on the surface of a carrier, and polymerizing the carrier with polyurethane through an in-situ polymerization method to obtain the polyurethane-modified multi-walled carbon nanotube composite material. The multiwalled carbon nanotubes not only play a role of a physical filler, but also react with a soft segment and a hard segment in polyurethane through hydroxyl groups on the surfaces of the multiwalled carbon nanotubes, so that the elastomer achieves high-temperature aging resistance and ultraviolet aging resistance, ethylenediamine in the multiwalled carbon nanotubes can generate ureido with isocyanate, the interface bonding capacity of inorganic matter and a matrix is enhanced, and the mechanical property of the elastomer is improved. And the cohesive energy of the ureido is relatively large, so that the polyurethane hard segment is easy to react and gather, and the heat resistance and ultraviolet aging resistance of the matrix are further enhanced.

A method for refurbishing a pre-stressed concrete cylinder pipe (PCCP) comprises removing concrete from an existing inner surface of the PCCP at each end thereof to expose a metal core, cleaning the exposed metal core and depositing filler over the exposed metal core at each end of the PCCP to a thickness wherein the filler is substantially flush with the existing inner surface. One or more layers of carbon fibre reinforced polymer (CFRP) liner are applied to the existing inner surface of the PCCP and to the filler at each end of the PCCP. Each layer of CFRP liner conforms to the inner surface of the PCCP and the filler and remains substantially cylindrical with substantially constant diameter along a length of the PCCP with substantially unbent cylindrical ends. After curing all layer(s) of CFRP liner, each terminus of the layer(s) of CFRP liner is sealed.

The application relates to a structural health monitoring system and application thereof. A preparation method of a carbon fiber reinforced thermoplastic composite material involved in the system comprises the following steps: providing a plurality of carbon fiber reinforced thermoplastic resin layers; prepositioning a multifunctional sensor unit array between adjacent thermoplastic resin layers, the multifunctional sensor unit array comprising a functional film containing ferroelectric ceramic, an electrode layer, and an insulating protective layer between the functional film and the carbon fiber layer; wherein the functional film comprises ferroelectric ceramic material with dielectric and piezoelectric response characteristics; and performing selective laser solidification on the layer area prepositioned with the multifunctional sensor unit array, so that the layer interface locally melts under the action of laser heating and embeds the multifunctional sensor unit array between adjacent layers; wherein the peak temperature of the laser heating area in the selective laser solidification process is not higher than 200 DEG C.

The utility model discloses an efficient gluing device for carbon fiber prepreg cloth, which belongs to the technical field of carbon fiber prepreg cloth, and adopts the technical scheme that the efficient gluing device comprises a dipping gluing box, a supporting plate is arranged at the top of the dipping gluing box, and clamping mechanisms are arranged on the two sides of the rear side of the top of the dipping gluing box; fixing mechanisms are arranged on the two sides of the rear side of the top of the dipping and gluing box; the clamping mechanism comprises two sliding rods, a plurality of clamping plates, two sliding blocks, a plurality of connecting belts and two springs, the sliding blocks are connected to the surfaces of the sliding rods in a sliding mode, the bottoms of the sliding blocks are fixedly connected with the top of the top clamping plate, the connecting belts are fixedly connected between the rear sides of the adjacent clamping plates, the surfaces of the sliding rods are movably sleeved with the springs, and the springs are fixedly connected with the top of the top clamping plate. The problem that the gluing efficiency of the carbon fiber prepreg cloth is low due to the fact that an existing part of structures for gluing the carbon fiber prepreg cloth are inconvenient to glue multiple layers of carbon fiber prepreg cloth at the same time is solved.

Disclosed is a hybrid composite anode for a lithium ion battery comprising silicon nanoparticles, a multiwalled carbon nanotube (MWCNT) sheet, and a polymeric binder capable of enhancing capacity retention of the hybrid composite anode. Also disclosed is a method of manufacturing an anode for a lithium ion battery, the method comprising the steps of: manufacturing a carbon nanotube (CNT) pad on an anode current collector; dispersing the manufactured CNT pads in a mixture of deionized (DI) water and ethanol using a probe-type ultrasonic generator and a magnetic stirrer; and adding silicon nanoparticles, a multi-walled carbon nanotube (MWCNT) sheet, and a polymeric binder to the mixture, thereby forming a Si-MWCNT nanocomposite (SMC) anode.

The present invention relates to the technical field of functional composite materials, and provides an ultra-light wide-angle wave-absorbing metamaterial based on 2-18 GHz full-frequency absorption of low-price and easily-available carbon-based conductive films and easy to manufacture, and a manufacturing method therefor. The metamaterial comprises a first dielectric substrate, a first carbon-based conductive thin film structure array layer, a second dielectric substrate, a second carbon-based conductive thin film structure array layer, a third dielectric substrate, and a third carbon-based conductive thin film structure array layer which are sequentially stacked from bottom to top. The first, second and third carbon-based conductive thin film structure array layers are all formed by periodically arranging discrete carbon-based conductive thin film patches. According to the present invention, by means of coupling of multilayer carbon-based conductive thin film periodic unit arrays, a wave-absorbing metamaterial having the characteristics of low price, easy formation processing, ultra-lightness, ultra-wideband, stable large incident angle, high absorptivity, and the like is obtained; the metamaterial weighs 0.4-0.5 kg per square meter, which is only 1 / 100 of that of a traditional absorber of the same size. The metamaterial has an absorption rate of 90% or more in a full frequency range of 2-18 GHz.