207 results about "Carbon Nanoparticles" patented technology

A method of preparing an enhanced oil recovery composition is described. The method includes carbonizing (200) a biomass waste material (202) to provide carbon microparticles (208). The method includes functionalizing (300) the carbon microparticles (208) through an acid treatment such that the carbon microparticles have a hydrophilic surface (306). The method further includes grinding (400) the carbon microparticles to provide carbon nanoparticles (406), where the carbon nanoparticles have a hydrophilic surface (306) and a hydrophobic surface (404). A method of enhanced oil recovery is also described.

The invention provides a resistance-type flexible multifunctional sensor and a preparation method and application thereof. The sensor comprises a flexible fabric, a sensing layer attached to the surface of the flexible fabric and an electrode attached to the surface of the sensing layer. The sensing layer is of an intercalation structure formed by stacking and distributing graphene (GR), carbon nanoparticles (CNPs) and silicone rubber (SR). According to the resistive flexible multifunctional sensor and the preparation method and application thereof, the sensing layer of an intercalation structure formed by stacking and distributing the graphene, the carbon nanoparticles and the silicone rubber is adopted, measurement of pressure, strain and temperature can be achieved at the same time, and therefore the high-performance flexible multifunctional sensor is obtained; and a multi-mode sensing mode is expected to be provided for precise monitoring and somatosensory application.

The invention provides a preparation method of a carbon fiber screen supporting structure, which comprises the following steps: S1, graphitizing continuous carbon PAN-based carbon fiber and continuous pitch-based carbon fiber, oxidizing, electrolyzing, washing, drying, sizing and drying to obtain surface modified carbon fiber; s2, impregnating the surface-modified carbon fibers on the surface of the resin adhesive film loaded with the aminated carbon nanotubes in a preimpregnation machine, and electrifying the carbon fibers in the impregnation process, so that the carbon nanotubes are vertically rooted on the surfaces of the carbon fibers to obtain a carbon fiber prepreg; s3, the PAN-based carbon fiber and the pitch-based carbon fiber prepreg are orthogonally laid on a hot-pressing mold, and then vacuumizing treatment, curing forming treatment, demolding and machining are sequentially carried out, so that the carbon fiber screen supporting structure is obtained.

The invention relates to the technical field of bearing lubricating grease, and particularly discloses a high-temperature-resistant lubricant composition and a preparation method thereof. The high-temperature-resistant lubricant composition comprises the following raw materials in parts by weight: 90-110 parts of base oil, 30-35 parts of a thickening agent, 2-3.5 parts of modified nanoparticles, 0.5-1.5 parts of an antioxidant, 1-3 parts of an antirust agent and 0.5-1 part of a friction modifier, the thickening agent comprises polyethylene glycol, modified polyurea lubricating grease and a surfactant according to a mass ratio of 1: (0.3-0.5): (0.1-0.15); the modified nano particles are brominated-1-hexadecyl-3-methylimidazolyl ionic liquid modified nano particles, and the nano particles comprise carbon nano particles and nano tungsten disulfide in a mass ratio of (2-3): 1. The lubricating grease composition provided by the invention has the advantages of good nanoparticle dispersibility, strong high temperature resistance, and excellent oxidation stability and antifriction and antiwear properties.

The invention relates to the technical field of semiconductor material preparation, and provides a TaC composite coating process based on a carbon nanostructure transition layer and a product thereof. The method comprises the following steps: a) pretreating the surface of a base material to form a groove, b) introducing a carbon source gas, carrying out first chemical vapor deposition under the action of a metal salt catalyst to grow carbon nanoparticles, and depositing the base material pretreated in the step a) to obtain a transition layer deposition base material, c) gasifying a tantalum source, mixing the gasified tantalum source with the carbon source gas, a reaction gas and a carrier gas, and carrying out second chemical vapor deposition to obtain the transition layer deposition base material. And second chemical vapor deposition is conducted, the transition layer deposition base material is filled with the fine grain particle layer, then deposition continues to be conducted on the surface of the transition layer deposition base material to form the coarse grain particle layer, and finally the TaC composite coating is obtained. According to the method, the compactness of the coating can be improved, the bonding strength of the coating and the base material is enhanced, the performance of the TaC composite coating is improved, the service life of the TaC composite coating is prolonged, and the reliability of the TaC composite coating is improved.

The invention relates to a material component adjustable and controllable additive manufacturing process based on laser powder bed melting, which comprises the following steps: S1, determining a component gradient path of a printing material from a workpiece matrix area to a strengthening area according to a preset workpiece three-dimensional model; s2, after matrix powder is laid layer by layer according to the component gradient path in the S1, a carbon nanoparticle solution is sprayed in a strengthening area; s3, carrying out L-PBF treatment in the matrix area by adopting a high scanning speed and a low power parameter, and carrying out L-PBF treatment in the strengthening area by adopting a low scanning speed and high power, so that the matrix powder and the carbon nanoparticles form metallurgical bonding; and S4, the steps S2 and S3 are repeated till forming, and a workpiece is obtained through aftertreatment. The method has the advantages of high component control precision, high material utilization rate and capability of realizing a complex functional gradient structure.

The application provides a biomass-based hard carbon composite negative electrode material with high capacity and high initial efficiency, and a preparation method and application thereof. The biomass-based hard carbon composite negative electrode material has high capacity and high initial efficiency, and also has excellent cycle performance. AlCl3 and SnCl4 are added into molten pitch, and AlCl3 and SnCl4 react with water in the pitch to generate nano Al2O3 particles and nano SnO2 particles, thereby obtaining modified pitch. After the modified pitch is prepared into a solution, the modified pitch can be filled into pores of a hard carbon precursor and form a coating layer on a surface of the hard carbon precursor in the process of impregnation of the hard carbon precursor. In a high-temperature carbonization process, the hard carbon precursor is converted into hard carbon, nano SnO2 is reduced into nano Sn particles by carbon, and pitch is converted into amorphous carbon. The nano Sn particles, the amorphous carbon and the nano Al2O3 particles are uniformly distributed in pores and on a surface of the hard carbon, and synchronous modification of the inside and the surface of the hard carbon is realized.

The invention discloses nano composite hydrogel modified silica gel as well as a preparation method and application thereof. The method comprises the following steps: (1) preparing carbon nanoparticles; (2) preparing a polyvinyl alcohol aqueous solution and a pre-polymerized solution of carbon nanoparticles and hydrogel; (3) preparation of nano-composite hydrogel modified silica gel: adding the pre-polymerized liquid and silica gel into the polyvinyl alcohol aqueous solution under stirring, adding an initiator, carrying out hot bath, carrying out condensation reflux in an inert atmosphere for reaction, and then adding a polyvinyl alcohol cross-linking agent and an HCl aqueous solution for reaction; and after the reaction is finished, centrifugally washing and drying to obtain the nano-composite hydrogel modified silica gel. The nano-composite hydrogel modified silica gel has excellent hydrophilicity, can be used as a hydrophilic mode liquid chromatography filler, and has great development space and application potential in the field of chromatographic separation and analysis.

The preparation method comprises the following specific steps: firstly, loading carbon nanoparticles and SiO2 nanoparticles on the surface of BNNS to obtain 1-BNNS / C / SiO2, then preparing a porous hollow SiO2 coated BNNS / C composite material (2-BNNS / C / SiO2), and mixing double-structure BNNS / C / SiO2 as a polyurethane filler to obtain the wave-absorbing and heat-conducting super-hydrophobic anticorrosive coating. The coating consists of a polyurethane matrix and two BNNS / C / SiO2 composite materials with different structures, and the structure of the 1-BNNS / C / SiO2 composite material is as follows: carbon nanoparticles are uniformly loaded on the surface of BNNS, and then SiO2 microspheres are uniformly grown on the surface of the BNNS; the structure of the 2-BNNS / C / SiO2 composite material is as follows: BNNS uniformly loaded with carbon nanoparticles is wrapped by porous and mesoporous SiO2 microspheres. According to the prepared wave-absorbing and heat-conducting type super-hydrophobic anticorrosive coating, the tight attachment of the carbon nanoparticles and the SiO2 nanoparticles on the surface of the BNNS is fully utilized, and an efficient conductive network and a heat conduction path are constructed. And the BNNS and the porous SiO2 microspheres can optimize impedance and enhance wave absorption.

The present invention provides a method for preparing photoluminescent carbon nanoparticles containing diamond structure by using low-rank coal, including a method for preparing carbon nanoparticles containing nano-diamond structure by using low-rank coal, characterized in that it comprises: step S1, ball-milling and sieving the low-rank coal to obtain coal powder; step S2, mixing the coal powder with a hydrogen peroxide solution in a certain proportion, stirring at a certain temperature and heating at normal pressure for reaction; step S3, filtering the solution after the reaction; step S4, drying the filtrate after the filtration to obtain carbon nanoparticles containing nano-diamond structure. The method of the present invention is simple, and the luminescent effect of the prepared carbon nanoparticles is simple and adjustable.

The invention discloses a silicon-carbon composite film negative electrode material and a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The silicon-carbon composite film negative electrode material is of a three-layer film structure and comprises a first silicon-carbon composite film, a second silicon-carbon composite film and a third silicon-carbon composite film which are sequentially stacked, wherein the diameter of the silicon-based material in the second silicon-carbon composite film is greater than the diameters of the silicon-based materials in the first silicon-carbon composite film and the third silicon-carbon composite film; the thickness of the second silicon-carbon composite film is larger than that of the first silicon-carbon composite film and that of the third silicon-carbon composite film. The silicon-carbon composite film negative electrode material has a three-layer structure, and by controlling the diameter and content of the carbon nanoparticles in different layers, on the premise of ensuring the capacity, the silicon nanoparticles can be effectively prevented from being separated from the electrode contact, and the capacity attenuation in the charge-discharge cycle process of the battery is relieved.

The present invention relates to single-crystal spherical carbon nanoparticles that are single-crystals, are spherical, and have an average particle diameter of 1 nm to 30 nm. The single-crystal spherical carbon nanoparticles of the present invention can generate fluorescence with a high fluorescence quantum efficiency when excited by a light in wide wavelength range from ultraviolet light to visible light, and have fluorescence quantum efficiency of 10% or more compared to conventionally known carbon nanoparticles. The single-crystal spherical carbon nanoparticles can be used for drug delivery, because they do not have toxicities to living organisms that compound semiconductors made of cadmium, selenium, tellurium, and the like have. Furthermore, since the single-crystal spherical carbon nanoparticles are spherical, they can be densely packed as electrode materials for solar cells and secondary ion batteries, and can be used for negative electrode for lithium ion batteries or electrode material for solar cells.

An electroluminescent device includes a first electrode and a second electrode, which are spaced apart from each other (e.g., facing each other), and an emission layer disposed between the first electrode and the second electrode. The emission layer is configured to emit first light having a predetermined peak emission wavelength, and includes a semiconductor nanoparticle and a carbon nanoparticle. The carbon nanoparticle has a dimension of greater than or equal to about 2 nm and less than or equal to about 50 nm.

The present invention relates to a positive electrode, a manufacturing method thereof, and all-solid-state rechargeable batteries, the positive electrode comprising a positive electrode current collector and a positive electrode active material layer positioned on the positive electrode current collector, wherein the positive electrode active material layer includes a positive electrode active material, a sulfide-based solid electrolyte, a binder and a conductive material, the conductive material includes carbon nanotubes and carbon nanoparticles, and, on the basis of 100 wt% of the total of the carbon nanotubes and the carbon nanoparticles, the carbon nanotubes are includes in the amount of 40-90 wt% and the carbon nanoparticles are included in the amount of 10-60 wt%.

To provide a structure having a dense carbon film. [Solution] A structure comprising a conductive substrate and a carbon film on the surface of the conductive substrate, wherein the carbon film includes an aggregate of carbon nanoparticles, and the carbon nanoparticles are made of amorphous carbon.

The invention belongs to the field of electrochemical detection, and particularly relates to an integrated monolithic electrode adhered by a functional membrane, a preparation method and application of the integrated monolithic electrode in metal ion detection. The integrated monolithic electrode is characterized in that a working electrode, an auxiliary electrode and a reference electrode are integrated on a chip, the working electrode is the integrated monolithic electrode bonded by the functional membrane, the surface of a matrix electrode is modified, and the surface of the matrix electrode is coated with a coating; the modification material is one or more of carbon nanoflowers with a porous cage-shaped structure, metal nanoparticles and an enhanced electron conduction film. According to the invention, a working electrode in an integrated monolithic electrode is used as a substrate electrode, and the surface of the working electrode is cooperated with carbon nanoparticles and gold nanoparticles with porous cage structures through a functional film, so that a sensing system with excellent interface characteristics is constructed, and the sensor has the advantages of high sensitivity and high stability.

The present disclosure relates to a negative electrode for a lithium secondary battery and a lithium secondary battery including same. According to an embodiment of the present disclosure for solving technical problems, the negative electrode for a lithium secondary battery includes a negative electrode current collector and a composite layer disposed directly on the negative electrode current collector, and the composite layer may include a polymer, carbon nanoparticles, and insulating particles.

The invention relates to the technical field of nano-particle preparation, and discloses preparation and application of a hollow porous yolk shell structure silicon-carbon nano-composite material. According to the hollow porous yolk shell structure silicon-carbon nano-particle provided by the invention, a silicon nano-sphere is used as a core, and a hollow layer between a carbon shell layer and the core is based on a carbon-coated porous channel; the volume change of the silicon nanoparticles in the charging and discharging process is fully released, and the mechanism stability of the electrode material is kept; meanwhile, the hollow structure and the porous structure are beneficial to de-intercalation migration of lithium ions in the silicon nanoparticles, and the rate capability is increased; in addition, the carbon coating layer can avoid direct contact between the silicon nanoparticles and an electrolyte, so that the electronic and ionic conductivity of the material is ensured, and the first coulombic efficiency is improved. When the carbon-silicon composite material prepared by the method is used as a negative electrode, the battery capacity is relatively high, and the rate capability is relatively long.

Graphenic carbon nanoparticles that are dispersed in solvents through the use of dispersant resins are disclosed. The graphenic carbon nanoparticles may be milled prior to dispersion. The dispersant resins may comprise a polymeric dispersant resin comprising an addition polymer comprising the residue of a vinyl heterocyclic amide, an addition polymer comprising a homopolymer, a block (co)polymer, a random (co)polymer, an alternating (co)polymer, a graft (co)polymer, a brush (co)polymer, a star (co)polymer, a telechelic (co)polymer, or a combination thereof. The solvents may be aqueous, non-aqueous, inorganic and / or organic solvents. The dispersions are highly stable and may contain relatively high loadings of the graphenic carbon nanoparticles.

The invention relates to a composite material taking polyether-ether-ketone as a base material. The composite material comprises the following components in percentage by weight: 30 + / -20 percent of glass fiber, 0.1-2.0 percent of graphene and / or 0.1-2.0 percent of carbon nano tube. On the basis of the composite material, the invention also provides an electric insulation bearing ring (2, 3) and an electric insulation rolling bearing (1) adopting the electric insulation bearing ring. The electrically insulating bearing ring (2, 3) comprises an electrically insulating layer formed from the above composite material for blocking the passage of a leakage current. The electric insulation layer formed by the polymer composite material can greatly weaken the leakage current of the electric insulation bearing and obviously inhibit the electric corrosion damage to the bearing.

A method of preparing an enhanced oil recovery composition is described. The method includes carbonizing a waste plastic material to provide carbon microparticles, functionalizing the carbon microparticles with a SO3-containing gas such that the carbon microparticles have a hydrophilic surface, and grinding the carbon microparticles to provide carbon nanoparticles. The carbon nanoparticles have a hydrophilic surface and a hydrophobic surface. A method of enhanced oil recovery is also described.

According to the Si-coated C / C nano composite material, the preparation method thereof and the high-performance lithium ion battery provided by the invention, nano silicon particles and dopamine hydrochloride are used as raw materials, and an amorphous carbon layer is formed on the surface of the raw materials through preparation, so that the conductivity of a silicon negative electrode is improved; and meanwhile, surface passivation or structure collapse of the silicon negative electrode caused by excessive lithium ion embedding is prevented. And carrying out one-step carbonization through a sol-gel method to obtain the silicon-coated carbon / carbon. Compared with the prior art, the silicon-electrolyte contact area is increased, so that the electron / ion transmission kinetics is improved. In addition, the silicon and carbon nanoparticles are mostly anchored on the porous three-dimensional frame, so that the agglomeration phenomenon of the silicon particles of the nanostructure can be prevented, meanwhile, a large amount of space is provided, the violent volume change of the silicon negative electrode in the charging and discharging process is relieved, and the silicon negative electrode is prevented from falling off from the current collector. The prepared lithium ion battery has the advantages of good cycle performance, high energy density, no toxicity, no pollution and the like.

The present invention is applicable to the field of electrochemical sensors and provides a method for preparing an enzyme-free electrochemical sensor with a modified electrode and its application, comprising the following steps: drawing a capillary quartz tube into a needle-shaped nanoquartz tube, uniformly distributing carbon nanoparticles on the tip of the nanoneedle tip to form a carbon nanotube (CNE); dissolving HAP, sodium hexametaphosphate, and potassium chloride in deionized water at a concentration ratio of 0.01 to 0.1:1:1, and ultrasonically forming a dispersion; placing the CNE as a working electrode, Ag / AgCl as a reference electrode, and a platinum wire as an auxiliary electrode in an electrolytic cell containing a HAP suspension solution, applying an external positive voltage to the working electrode CNE, and completing constant potential deposition to prepare an nHAP-CNE modified sensor. The sensor prepared based on the nHAP modified electrode has the advantages of high sensitivity, low sample requirement, high biological activity, and suitability for in vivo cell detection in detecting ascorbic acid.

The invention relates to the technical field of rock slice detection, and particularly discloses a rock slice positioning detection method combining multiple in-situ test instruments, which comprises the following steps: preparing a sample, slicing a rock sample to be detected, and transversely cutting the original sample into two parts to form a transverse section I and a transverse section II which completely correspond to each other in position and size, the parallelism error of the two sections is less than or equal to 50 microns, and the area difference is less than or equal to 1 Instrument calibration: designing a general sample table, and calibrating a plurality of in-situ test instruments by matching an SEM (scanning electron microscope), an AFM (atomic force microscope), a Raman spectrometer and micro-area X-ray fluorescence equipment; platinum and carbon nano-particle marks (the precision is smaller than 100 nm) deposited through electron beam induction are fixed to the edge of the thin sheet through an atomic-scale combination technology, compared with traditional micron-scale marks (the error is larger than 1 micron), the positioning precision is improved by 10 times or above, and nano-scale view fields of TEM and SEM instruments can be accurately matched.

The purpose of this invention is to synthesize a carbon dot-based nanozyme and its cascade detection application. Using ascorbic acid and 1,3,5-pyromellitic acid as raw materials, ethylenediamine as a nitrogen dopant, and ferric chloride as a metal source, a one-step microwave synthesis method is employed in a microwave reactor (glass material). This method solves the problem of high energy consumption caused by the need for high temperature, high pressure, or long reaction time in existing technologies. Characterization and analysis of its morphology, structure, and properties revealed that the prepared iron-nitrogen co-doped carbon dot-based nanozyme consists of two-dimensional spherical carbon nanoparticles with excellent Fe-N... x The active site exhibits POD-like enzyme activity, with catalytic activity exceeding that of most reported nanozymes. Furthermore, this invention synergistically utilizes its peroxidase-like catalytic activity and photodynamic effect to significantly enhance reactive oxygen species (ROS) generation, achieving highly sensitive detection of organophosphorus pesticides and significantly reducing their detection limits. This synergistic strategy provides a new approach for expanding the application of nanomaterials in chemical analysis and sensing.

The invention provides liquid compositions comprising conductive carbon particles and / or carbon nanoparticles, a thickening agent, and a solvent. The carbon nanoparticles are preferably a mixture of graphite nanoplatelets and carbon nanotubes and the thickening agent is preferably a cellulose derivative. The liquid compositions can be used as ink to print highly conductive films that adhere to paper substrates.

The present invention provides a cathode for a proton battery comprising a Prussian blue analogue and a method for manufacturing a cathode for a proton battery, the method comprising the steps of forming a slurry comprising a Prussian blue analogue, battery grade carbon nanoparticles, and a binder, and coating a layer of slurry on a cathode current collector to form the cathode.

The invention discloses an iron-carbon nano adsorbent for environmental remediation and a preparation method thereof, and belongs to the technical field of preparation of iron-carbon nano catalysts. Comprising the following steps: 1, preparing an iron salt solution, a carbon source, a reducing agent and a binder; 2, mixing the ferric salt solution with a reducing agent to prepare iron nanoparticles; 3, preparing a carbon nanomaterial by using an arc discharge method; 4, mixing the iron nanoparticles in the step 2, the carbon nanomaterial in the step 3 and the binder in the step 1 according to a certain mass ratio, adding a certain solvent, and uniformly stirring to obtain a mixed solution; step five, separating the mixed solution in the step four to obtain iron-carbon nano-particles mixed with impurities, and washing the iron-carbon nano-particles mixed with impurities with a solvent to obtain pure iron-carbon nano-particles; and 6, putting the pure iron-carbon nanoparticles in the step 5 into a mold, and drying and molding at a certain temperature to obtain the iron-carbon nano adsorbent.

The present invention belongs to the field related to phase change materials, and specifically relates to a high thermal conductivity and high phase change enthalpy carbon nanocomposite phase change microcapsule and its preparation method. The present invention uses flaky graphene oxide as a dispersant to form a water-in-oil Pickering emulsion with graphene oxide as the interface, and adds an initiator to the aqueous phase to polymerize the aniline monomer and the cross-linking monomer in the oil phase at the interface of the Pickering emulsion to form a network polymer layer to fix the capsule thermal conductive particle shell. The microcapsule shell is composed of thermal conductive polymer cross-linked polyaniline and thermal conductive particle graphene oxide. The diameter of the thermal conductive carbon nanoparticles first dispersed in the alkane phase change material is equivalent to the diameter of the capsule, and a thermal conductive path supporting the skeleton structure is formed in the confined space inside the microcapsule, thereby improving the thermal conductivity of the microcapsule. It has the characteristics of high thermal conductivity and high phase change heat storage capacity, and can be applied to renewable energy storage, new energy vehicle thermal management, industrial waste heat utilization, aerospace engineering and other fields.

Lead / lead oxide / carbon (“Pb—O—C”) nanocomposite materials that are useful as electrode active materials for electrodes in lithium and sodium batteries are formed by grinding a mixture of a lead oxide material and a carbon material in a high energy ball mill. A Pb—O—C nanocomposite as described herein comprises Pb and lead oxide nanoparticles homogeneously dispersed in a carbon nanoparticle matrix. In the nanocomposite, other elements (e.g., transition metals, Al, Si, P, Sn, Sb, and Bi) can be alloyed with the Pb nanoparticles, incorporated as a mixed oxide with the lead oxide nanoparticles, or can be present as distinct elemental or oxide nanoparticles within the carbon nanoparticle matrix.