95 results about "Carbon skeleton" patented technology

Disclosed in the present invention are a bimetallic-atom-loaded porous carbon framework material, and a preparation method therefor and the use thereof. The preparation method comprises: by taking a metal organic framework as a precursor raw material, and by using the self-polymerization of a high-molecular polymer on the surface of the metal organic framework, forming a polymer-coated metal-based organic framework material (PM@MOF) having a core-shell structure; and then capturing the metal of a metal chloride salt solution by using surface functional groups of the PM@MOF dispersed in n-hexane, so as to obtain a bimetallic element-doped polymer-coated metal-based organic framework material, and subjecting same to a high-temperature treatment in an argon gas atmosphere so as to obtain a bimetallic-atom-loaded porous carbon-based material (MD@PC). In the present invention, by loading bimetallic atoms on a nitrogen-doped porous carbon matrix to form MD-NX coordination sites, which have the dual functions of sulfur fixation and catalysis, the agglomeration degree of intermediate phase lithium sulfide can be reduced, thereby guaranteeing that the lithiation reaction of sulfur is more sufficient, rapid and efficient.

The invention provides a boron-nitrogen heterocyclic compound as well as an intermediate and a preparation method thereof, the boron-nitrogen heterocyclic compound has a structure as shown in a general formula (1), and is prepared by taking compounds as shown in a formula A, a formula B and a formula C as intermediates. Compared with similar carbon skeleton molecules, the boron-nitrogen heterocyclic compound provided by the invention shows an excellent narrow-band luminescence property. The half-peak width of the emission spectrum of the boron-aza compound is as low as 6.4 nm, and meanwhile, the fluorescence quantum yield is as high as 97%.

A piezocatalyst containing a nitrogen doped carbon skeleton derived from a zeolitic imidazolate framework (ZIF), and a single-atom alkaline earth metal anchored on the nitrogen doped carbon skeleton, where the alkaline earth metal is selected from the group of beryllium (Be), magnesium (Mg), calcium (Ca), Strontium (Sr), and barium (Ba); the piezocatalyst includes an active cite formed with the single-atom alkaline earth metal and nitrogen atoms from the ZIF. A piezocatalytic material includes the piezocatalyst. Also provided herein is a method of manufacturing such a piezocatalyst / piezocatalytic material and an environmental remediation method employing such a piezocatalyst / piezocatalytic material.

The invention belongs to the technical field of electro-catalysis and energy conversion, and provides a carbon skeleton loaded platinum monatomic-cobalt nanoparticle catalyst, a preparation method thereof and application in electro-catalysis hydrogen evolution, a ZIF-67-ZIF-8 precursor is prepared in an epitaxial growth mode, and the precursor is pyrolyzed to construct a carbon matrix containing cobalt nanoparticles; in the preparation process of ZIF-67-ZIF-8, the treatment duration of tannic acid is regulated and controlled, and the size of cobalt nanoparticles is accurately controlled; meanwhile, uniform N holes generated in the high-temperature pyrolysis process are beneficial to precise range limitation of PtN bonds, and finally the carbon skeleton loaded platinum monatomic-cobalt nanoparticle catalyst is constructed. The concentration of local protons around platinum sites is enriched through cobalt, and therefore adsorption of protons on platinum single atoms and generation of hydrogen are remarkably promoted. Due to the display of the bifunctional catalytic effect, the overall catalytic efficiency of the alkaline hydrogen evolution reaction is effectively improved. The catalyst shows excellent catalytic performance in alkaline hydrogen evolution reaction, and is expected to be widely applied to the water electrolysis hydrogen production technology.

The invention relates to the technical field of polymer dye synthesis, in particular to a polymer coloring agent based on a binary acid chromophoric monomer, a color master batch, a fiber and a preparation method of the polymer coloring agent. The structural formula of the diacid chromophoric monomer is as follows: # imgabs0. The chromophoric monomer has extremely high thermal stability, and can maintain the chemical structural integrity and chromophoric performance in a high-temperature environment (250 DEG C). The heat-resistant characteristic is mainly derived from a highly stable aromatic skeleton formed by a parent nucleus through an expanded conjugated system and a rigid plane structure, and heat vibration energy is effectively dispersed; in addition, a thermal stable group (an all-carbon skeleton) is introduced through side chain modification to form a steric hindrance effect, and molecular movement at high temperature is inhibited. Due to the unique heat resistance of the monomer, the monomer can be completely matched with a high-temperature processing window (240-300 DEG C) of a polyester melt polymerization process, and a polymer-dye composite system with a stable structure is constructed through covalent bonding in ester exchange and polycondensation processes.

The invention discloses a hydrophobic carbon-based monatomic catalyst and a preparation method thereof. The hydrophobic carbon-based monatomic catalyst comprises a carbon skeleton of a core-shell structure, a metal monatomic active site fixed on the carbon skeleton by forming a coordinate bond with N on the carbon skeleton, and an alkyl chain grafted on the carbon skeleton through a covalent bond. The alkyl chain is grafted through the covalent bond, chemical stable regulation and control of the hydrophobicity of the carbon-based nickel monatomic catalyst are achieved, covalent bond modification avoids the defects of a physical method, long-term stability of hydrophobicity is ensured, and efficient hydrophobic modification is achieved on the premise that monatomic sites are not damaged; a stable three-phase interface is formed on the hydrophobic surface, physical enrichment of CO2 near the catalyst is promoted, mass transfer resistance is reduced, CO2 diffusion is further accelerated through the hollow structure of the carbon skeleton, and the mass transfer capacity is improved.

The invention discloses porous graphite and a preparation method thereof, an electrode and a battery, and relates to the technical field of new energy. The preparation method of the porous graphite comprises the following steps: providing liquid resin and a liquid aromatic polymer, mixing, and sequentially carrying out heat treatment, carbonization treatment, graphitization treatment and activation treatment to obtain the porous graphite. According to the preparation method of the porous graphite provided by the embodiment of the invention, the porous graphite is prepared by taking the liquid resin and the liquid aromatic polymer as raw materials, multiple reactions of curing and aging of the resin and combination of the resin and the aromatic polymer occur in the heat treatment process, and the porous graphite is prepared in the carbonization process. Aromatic polymer molecules are rearranged into an ordered carbon layer, and resin cross-linked molecules form a hard carbon skeleton; in the graphitization process, the ordered carbon layer forms a graphite-like carbon layer, and the order degree of the hard carbon skeleton is not changed; in the activation process, the graphite-like carbon layer is difficult to etch, the hard carbon skeleton participates in the reaction to form a pore structure, and finally the porous graphite is prepared.

The invention relates to an aperture-adjustable porous carbon material and a preparation method and application thereof. The preparation method comprises the following steps: adding an alkali solution into a phenol source, stirring, heating to 60-90 DEG C, adding an aldehyde source solution, stirring, cooling to room temperature, and adding an acid solution to adjust the mixed solution to be neutral, so as to obtain a phenolic resin oligomer solution; evaporating water, and adding low-carbon alcohol to prepare a phenolic aldehyde low-carbon alcohol solution; preparing silicon dioxide sol, wherein the particle size of silicon dioxide particles is controlled by adjusting the pH value; the preparation method comprises the following steps: mixing and stirring a phenolic low-carbon alcohol solution and silicon dioxide sol at 35-45 DEG C, washing, filtering and drying to obtain a silicon dioxide-phenolic resin composite carbon source; carrying out carbonization treatment on the silicon dioxide-phenolic resin composite carbon source to obtain a carbonized product with a carbon skeleton and an S O < 2 > template; and carrying out wet etching treatment on the carbonized product, selectively etching the S < O2 > template so as to form holes in positions occupied by S < O2 > particles, and then washing, filtering and drying to obtain the porous carbon material with the adjustable aperture.

The invention relates to the technical field of carbon material preparation, in particular to phenolic resin-based porous carbon and a preparation method thereof. The core of the preparation method of the phenolic resin-based porous carbon is that the mass ratio of phenolic aldehyde to phenolic aldehyde is optimized (1: (1-1.2)) to ensure sufficient crosslinking, and an amine catalyst is selected to reduce metal residues; meanwhile, terephthalaldehyde is introduced as a cross-linking accelerant, so that the bridging density and thermal stability of a resin network are effectively enhanced, and structural collapse is inhibited in subsequent carbonization; a sectional type carbonization process is further adopted, and the carbon skeleton is preserved by controlling the heating rate. According to the method, the carbonization yield is finally and successfully improved to 58% or above (improved by 15%-20% compared with that of a traditional method), the ash content is remarkably reduced (smaller than or equal to 0.2%), and an excellent material with a small mesoporous structure (the average pore diameter ranges from 2 nm to 10 nm) and a high specific surface area (larger than or equal to 1500 m < 2 > / g) is obtained.

The invention discloses a carbon-coated ZnO / CoO composite adsorbent and a preparation method thereof, the method comprises chloromethylation modification, amination modification, ZIFs in-situ growth and preparation of the carbon-coated ZnO / CoO composite adsorbent, and the invention relates to the technical field of adsorption materials. According to the invention, styrene resin microspheres are subjected to chloromethylation to introduce active functional groups, and amination is carried out to generate amino groups (-NH), so that active sites coordinated with metal ions are provided, and in-situ growth of ZIF-8 and ZIF-67 on the surface of resin is promoted. The crystal morphology and distribution are effectively controlled by optimizing the molar ratio of the zinc salt and the cobalt salt to the ligand and selecting the solvent and the nucleating agent. And finally, after the material is subjected to high-temperature calcination, the resin and the ZIFs are subjected to synergistic pyrolysis to form a structure that the nano oxide is uniformly embedded into the porous carbon skeleton, so that the stability, the active site density and the gas diffusion efficiency of the adsorbent are remarkably improved.

The invention relates to the technical field of nano-materials, and discloses a heterogeneous diatomic nano-enzyme as well as a preparation method and application thereof. The invention provides a space confinement regulation and control strategy which is used for constructing a heterodiatomic catalytic center on a nitrogen-doped carbon skeleton and preparing nano-enzyme with structural stability and synergistic catalytic performance. According to the method, a confinement framework formed by self-assembly of first metal ions such as cobalt ions and second metal ions such as zinc ions and organic ligands is used as a template, third metal ions such as iron ions are introduced, and then carbonization heat treatment is performed in a protective gas atmosphere, so that bimetal sites with stable bridging configuration are formed in situ. The obtained nano-enzyme has the catalytic activity of various antioxidant enzymes, including catalase and remarkable superoxide dismutase activity, and has more excellent free radical scavenging capacity compared with a single-metal or non-bridging system.

The invention provides a nitrogen and sulfur co-doped carbon material adsorbent as well as a preparation method and application thereof, and belongs to the technical field of new materials. According to the simple and efficient synthesis method of the carbon-based adsorbent, hexamethylenetetramine is used for replacing ammonia and formaldehyde to be polymerized with resorcinol to form resin balls, in addition, NH4 < + > released by hydrolysis of hexamethylenetetramine is also a source of nitrogen in a carbon skeleton, and the surface performance of the resin balls can be improved. Meanwhile, thiourea is introduced, nitrogen and sulfur are doped into resin balls at the same time to participate in formation of pore channels, and the pore diameter structure is adjusted. Finally, through activation modification of KOH, the pore structure of the carbon spheres is further adjusted, more micropores beneficial to separation of CO2 / CH4 and CH4 / N2 are generated, and the simple and effective synthesis method provides huge potential for large-scale production of microporous carbon and nitrogen-doped carbon.

The invention discloses a composite material and a preparation method and application thereof. The composite material comprises a porous carbon skeleton, wherein nano red phosphorus is attached to the porous carbon skeleton; the surface of the porous carbon skeleton is coated with the carbon coating layer. The composite material disclosed by the invention has the following beneficial effects that a large number of pores are formed in a porous carbon skeleton, so that the problem of volume expansion of nano red phosphorus attached to the porous carbon skeleton can be effectively solved, and the electron transmission distance is shortened; electron transfer and intercalation and deintercalation of cations therein and transport between the electrode and electrolyte interface are accelerated. The carbon coating layer on the outer side can isolate direct contact between nanometer red phosphorus in the carbon skeleton and a phosphor salt generated in a working state and an electrolyte, so that side reaction is avoided; and the material conductivity can be improved, the polarization is reduced, and the stability of the electrode structure is ensured. Therefore, the composite material can bring excellent cycle performance as a negative electrode active material.

The invention discloses a surface villus modified composite carbon material preparation method, which comprises: S1, carrying out cleaning, drying and crushing treatment on a carbon source having a multi-dimensional skeleton structure to obtain multi-dimensional skeleton solid powder; s2, mixing the multi-dimensional skeleton solid powder obtained in the step S1 with one-dimensional cellulose nanofibers according to a certain mass ratio to form mixed solid powder, adding deionized water, stirring to form a uniform viscous material, and drying to obtain a fluff composite precursor; and S3, carrying out carbonization treatment on the fluff composite precursor obtained in the step S2 to obtain the surface fluff modified composite carbon material. According to the invention, the carbon composite material with fluff modification on the surface is directionally constructed by utilizing the idea of multidimensional carbon skeleton compounding, and the directional regulation and control of the physical morphology of the traditional carbon material are realized.

The invention relates to a method for constructing a porous carbon molecular structure model with an adjustable pore structure, which comprises the following steps of: (1) calculating the number of required carbon atoms according to the density of the porous carbon molecular structure model, calculating the number of basic structure units in the model, and determining the number and radius of virtual atoms; (2) packaging the basic structure units and the virtual atoms in a three-dimensional periodic boundary with the side length of 5nm by adopting a random filling method, and keeping the positions of the virtual atoms fixed to obtain an initial configuration of the molecular structure model; (3) carrying out structure optimization on the initial configuration, carrying out annealing dynamics simulation, and gradually annealing the system from 6000 K to 300 K to form a balanced system; and (4) removing virtual atoms in the system to obtain a carbon skeleton structure, adding hydrogen atoms on the carbon skeleton structure, and carrying out structure optimization to obtain the porous carbon molecular structure model. According to the method, wide porosity and pore size distribution can be generated, and the purpose of controlling the pore structure is achieved.

The invention belongs to the technical field of catalyst preparation, and discloses a Fe-doped ZIF-67 derivative catalyst, a preparation method and application of the Fe-doped ZIF-67 derivative catalyst to electro-catalytic oxygen evolution, and the preparation method comprises the following steps: in argon, carrying out heat preservation on Fe2O3 (at) CNHs / ZIF-67 powder and S powder at 500-550 DEG C for 20-30 minutes; according to the method for introducing heterogeneous metal doping, additional chemical reagents and absolute ethyl alcohol do not need to be added into the formed ZIF-67 for repeated cleaning, and the problem of environmental pollution caused by a solvent is avoided. Fe2O3 (at) CNHs / ZIF-67 powder and S powder are subjected to heat preservation at a high temperature, in the sulfuration process, an organic framework ZIF-67 is pyrolyzed at the high temperature, Fe2O3 is reduced, Fe is doped into CoS2 crystals, and the Fe-doped ZIF-67 derivative catalyst is formed. After high-temperature vulcanization, the CNHs have a certain supporting effect on a collapsed carbon skeleton of the ZIF-67, and the stability of electro-catalysis oxygen evolution is maintained.

The present invention discloses a preparation method and application of a flexible current collector material, which relates to the technical field of current collector preparation. The preparation method of the flexible current collector material comprises heating chitosan gel to a first temperature T1 for pretreatment, wherein the first temperature T1 is lower than the carbonization temperature of the chitosan gel; and carbonizing the chitosan gel after the pretreatment to obtain the flexible current collector material. The temperature increase pretreatment reduces the local damage to the basic carbon skeleton of chitosan caused by the internal stress of the molecules, which helps to maintain the structure of the basic carbon skeleton of the chitosan gel; the temperature increase below the carbonization temperature of the chitosan gel also reduces the excessive dehydration and excessive hardening of the chitosan gel, while causing the molecular chains of the chitosan gel to rearrange and adjust at a slower rate. The structure of the flexible current collector material formed is looser and more orderly, so that the material has better flexibility while maintaining a certain mechanical strength.

The application provides a metal-carbon skeleton nano-microparticle and a preparation method thereof, and belongs to the field of nanometer material preparation, wherein the metal-carbon skeleton nano-microparticle is prepared from raw materials through a solvothermal reaction; the raw materials comprise, in percentage by mass, 3-15% of polymerizable monomers, 0.05-1.5% of initiators, 0.01-1.5% of metal salts and the balance of solvents; the active functional groups of the polymerizable monomers comprise nitrogen and / or oxygen; and the metal salts comprise at least one of aluminum salts, zirconium salts, chromium salts and zinc salts. The application uses metal ions and organic precursors containing active groups as raw materials, realizes controllable adjustment of the particle size of the nano-microparticles in the range of 1-5000 nanometers through metal crosslinking, induced nucleation and in-situ carbonization processes. The preparation process of the application is simple and controllable, the obtained nano-microparticles are uniform in size, stable in structure, high in temperature resistance and salt resistance, and can be widely applied in the fields of catalysis, sensing or oil displacement.

This invention belongs to the field of biomass materials technology, specifically relating to a titanium-doped biochar, its preparation method, and its applications. In this invention, supercritical fluid is used for composite processing. Its unique high diffusion and low surface tension characteristics enable uniform distribution of the titanium source within the protein fibers and induce condensation reactions between hydroxyl groups on the titanium surface and carboxyl groups in the protein fibers within the supercritical system, forming high-density Ti-O-C chemical bonds. Furthermore, low-temperature thermal induction is performed based on the supercritical pre-swollen matrix structure to complete the ordered reconstruction of the carbon skeleton structure and the regulation of active sites, achieving in-situ self-doping of N and S while avoiding the TiO2 phase transformation. This further improves the stability and photocatalytic performance of the titanium-doped biochar, enabling visible light response.

The present application provides a kind of coal tar macromolecular network model construction method based on HRTEM and XPS, belongs to chemical molecular reaction kinetics technical field, including S1: processing coal tar macromolecular sample HRTEM image data;S2: determine the element composition and functional group composition of coal tar macromolecular sample;S3: set the basic unit structure of coal tar macromolecular network model, and calculate the proportion of different unit structure;S4: construct the aromatic layer sheet of carbon skeleton unit in coal tar macromolecular network model;S5: set the bridge bond of carbon skeleton unit, finally obtain the complete carbon skeleton unit in coal tar macromolecular network model;S6: revise the edge of carbon skeleton unit, hydrogenation is added to carbon skeleton unit and the coal tar macromolecular network model is optimized.It can finely construct coal tar macromolecular network, restore the real composition of coal tar molecule to the greatest extent, ensure that subsequent calculation structure is more real, suitable for constructing macromolecular network model for coal tar obtained under different coal rank and different working conditions.

The invention relates to a preparation method and application of a polymer-loaded cobalt-based heterogeneous catalyst, a metal component is metal Co, and an organic ligand polymer is a polymer which is generated by solvothermal copolymerization of a vinyl-containing heteroatom monomer and a vinyl-containing carbon skeleton monomer and has a large specific surface area and a hierarchical pore structure. When the catalyst is used in hydroformylation reaction, on one hand, metal components and heteroatoms in a polymer carrier stably exist on the carrier due to coordination; on the other hand, the polymer carrier has a large specific surface area and a hierarchical pore structure, and the metal component can exist on the carrier in a high-dispersion manner, so that the solid heterogeneous catalyst has excellent catalytic reaction performance and stability, is easy to separate from reactants and products, and has a wide industrial application prospect.

The invention provides a Fe-Mo bimetallic catalyst with chitosan as a carbon skeleton and a preparation method and application thereof, and belongs to the technical field of wastewater treatment catalyst preparation. Chitosan is used as a carbon base material, metal ions are wrapped in chitosan beads, M-N and C-N bonds are formed by amino functional groups of a chitosan structure and transition metal, a large number of active sites can be provided after calcination, and explosive and powder components in wastewater can be rapidly degraded. The Fe-Mo bimetallic catalyst with the chitosan as the carbon skeleton is simple in preparation process and not harsh in use condition, catalytic degradation can be carried out only by putting the Fe-Mo bimetallic catalyst and hydrogen peroxide into wastewater together, and the Fe-Mo bimetallic catalyst can be recycled by adding a common magnet into the degraded wastewater, so that reutilization is realized. The research provides an alternative scheme for solving the problems that a photocatalyst preparation process is tedious, the raw material cost is high, industrial application is difficult to realize and the like in an existing explosive and powder wastewater degradation treatment technology, and has important practical significance.

The invention relates to a preparation method and application of a phenanthroline-based Schiff base derivative, a Schiff base substance is synthesized by amine-aldehyde condensation reaction between 1, 10-phenanthroline-2, 9-dicarboxaldehyde (PDL) and thionine (Thi), the PDL has an excellent carbon skeleton, the Thi has an excellent electron transport performance, and the Schiff base substance can be used for preparing the phenanthroline-based Schiff base derivative. The two are combined to synthesize a novel electron mediator (PT) with good electron transmission performance and high stability. The preparation method is simple, efficient and low in cost, the current in the solution to be detected is tested through a chronoamperometry, and the concentration of the catechol in the solution to be detected is obtained according to the linear relation between the concentration of the catechol and the current. According to the invention, PT is used as an electron transporter, the composite material is formed by loading laccase through PT to serve as a catechol electrochemical sensing catalyst, the composite material shows excellent electrochemical sensing performance, catechol is detected under the constant overpotential condition of 0.23 V (vs.SCE), the lowest detection lower limit is 0.531 [mu] M, and the linear response range is 1-1000 [mu] M.

This invention provides a method for preparing graphyne with all rhombic molecular channels, comprising: S1 ultrasonically cleaning a copper foil in a hydrochloric acid solution to obtain a pretreated copper foil substrate; S2 placing the pretreated copper foil substrate in a double-necked flask containing a palladium catalyst, adding a reaction solvent, and refluxing to obtain an activated copper foil substrate; S3 adding a polybrominated benzene and a magnetic particle sequentially to another double-necked flask, placing the activated copper foil substrate in the flask, and then adding a reaction solvent to obtain a reaction system; S4 dissolving the polyyneylbenzene in the reaction solvent to obtain a first mixed solution, adding the first mixed solution to the reaction system for synthesis to obtain graphyne with all rhombic molecular channels. By using trisubstituted and hexasubstituted monomers for cross-coupling reactions, a two-dimensional conjugated carbon framework with all molecular channels being rhombic is precisely constructed, synthesizing a graphyne-like carbon material with all molecular channels being rhombic.

The invention provides a three-dimensional crystal structure of a PsiM protein, SAH and Norbaeocystin compound, and belongs to the technical field of biology, the compound comprises the PsiM protein, SAH and Norbaeocystin, the PsiM protein has an amino acid sequence as shown in SEQ ID NO.1 or an amino acid sequence with at least 80% of sequence identity with the amino acid sequence as shown in SEQ ID NO.1, and the PsiM protein has an amino acid sequence as shown in SEQ ID NO.2 or an amino acid sequence with at least 80% of sequence identity with the amino acid sequence as shown in SEQ ID NO.2 or an amino acid sequence with at least 80% of sequence identity with the amino acid sequence as shown in SEQ ID NO.2. The atoms in the three-dimensional crystal structure of the compound have at least 80% of atomic coordinates listed in Table 1; or the square root variance of the atomic structure coordinates of the main chain carbon skeleton of at least 30% of amino acids and the atomic coordinates in the table 1 is smaller than or equal to # imgabs0 # imgabs1 #. The three-dimensional crystal structure is beneficial to clarification of a methyl transfer mechanism of PsiM protein in the Psilocybin biosynthesis process, so that structural basic guidance is better provided for Psilocybin biosynthesis; and the wide clinical application of the intermediate product Norbaeocystin in the traditional Chinese medicine is explored in an auxiliary manner. The invention further provides application of the three-dimensional crystal structure of the PsiM protein, the SAH and the Norbaeocystin compound of the stropharia rugoso-annulata to guidance and improvement of the biosynthesis yield of the Psilocybin.

The invention relates to a metal organic carbon skeleton derivative composite material as well as a preparation method and application thereof. The metal organic carbon skeleton derivative composite material comprises a metal organic carbon skeleton and metal particles loaded on the surface of the metal organic carbon skeleton, the metal organic carbon skeleton comprises rare earth elements and an organic ligand; the metal organic carbon skeleton has a rod-like structure. A metal organic carbon skeleton provided by the invention comprises rare earth elements and can provide good wave-absorbing performance, a continuous three-dimensional conductive carbon network formed by mutual connection of rod-shaped structures can provide effective dielectric, and gaps, interfaces and holes formed among the rod-shaped structures can also significantly increase multiple reflection and scattering of electromagnetic waves, so that the wave-absorbing performance is improved. The dielectric size, the polarization mode and the loss mechanism of the material are synergistically promoted, and impedance matching is optimized, so that the wave-absorbing performance of the material is further improved.

The invention discloses a joint replacement full-stage self-adaptive Ag-DLC coating and a preparation method thereof, the coating comprises a bio-friendly substrate, a titanium bonding layer and an Ag-element-doped Ag-DLC functional layer, the Ag element in the functional layer is embedded in a DLC carbon skeleton in the form of Ag nanoparticles, the size of the Ag nanoparticles is 1-35 nm, and the doping amount is 2-40 at.%. According to the invention, the DLC coating with the nanocrystalline / amorphous composite structure characteristic is constructed by doping the Ag element with the anti-bond characteristic, so that the synergism of functions such as mechanical bearing, abrasion resistance, antibacterial property and biocompatibility can be realized. By means of controllable release of the Ag nanoparticles, self-adaptive response of functional characteristics of the metal joint implant in the whole service stage can be achieved, the requirements of the coating on the antibacterial performance and biocompatibility in the early postoperative stage can be met, and reliable anti-abrasion protection and osteogenesis promoting functions can be provided for the stable postoperative service stage.

The application provides a preparation method of carbon-metal composite material based on in-situ limited hot pressing, and belongs to the field of nanometer materials and preparation technology thereof.The preparation method comprises the following steps: firstly, providing a mixed solution containing a carbon source and a mixed solution containing metal salt; then mixing the mixed solution containing the carbon source and the mixed solution containing the metal salt under stirring, so that metal ions in the metal salt are coordinated with the carbon source; standing and separating the precipitate to obtain a precursor, wherein the metal ions in the precursor are dispersed in a coordinated manner and anchored around the carbon source; finally, performing hot pressing carbonization on the precursor, so that the precursor is subjected to limited densification and in-situ carbonization under the synergistic action of a thermal field and a pressure field, so that the carbon source is converted into a carbon skeleton with a three-dimensional pore structure, meanwhile, the metal ions are in-situ reduced and loaded on the carbon skeleton, and the carbon-metal composite material is obtained.The application also provides the carbon-metal composite material obtained based on the preparation method and application thereof.

The application discloses a kind of silicon-carbon negative electrode material and preparation method thereof, belong to negative electrode material technical field.The silicon-carbon negative electrode material includes: N-doped porous carbon, using polyimide-polyurethane-phenolic resin copolymer is obtained by carbonization;Nano silicon particles are loaded in the pore and / or surface of N-doped porous carbon;Amorphous carbon coating is coated on the surface of N-doped porous carbon and / or silicon nanoparticles.The application uses polyimide-polyurethane-phenolic resin by copolymerization strategy, polyimide segment, polyurethane segment and phenolic resin segment are copolymerized into molecular main chain, realize the uniform distribution of rigid segment (phenolic, polyimide) and flexible segment (polyurethane) at molecular level, and the introduction of polyurethane can solve the phase separation problem of phenolic, polyimide in prior art, ensure that the N-doped porous carbon pore obtained after carbonization is uniform, and the mechanical properties of carbon skeleton are consistent.

The invention discloses a recycled plastic-based PC / ABS composite material and a preparation method thereof, and belongs to the technical field of high polymer materials, the recycled plastic-based PC / ABS composite material comprises the following raw materials by weight: 45-55 parts of recycled PC resin, 15-30 parts of ABS resin, 3-5 parts of a flame retardant, 5-8 parts of nano silica, and 0.3-1 part of an antioxidant; in the synthesis process of the flame retardant, an intermediate is firstly prepared, the structure of the intermediate has a carbon skeleton of pentaerythritol and also has a six-membered spiro structure, the intermediate has excellent thermal stability and char forming property, the introduced phosphate structure can endow the intermediate with flame retardant property, and then carbon-carbon double bonds on the intermediate react with phosphorus-hydrogen bonds on DOPO, so that the flame retardant is obtained. The introduced DOPO can be used as the flame retardant, and flame retardant molecules formed by reaction can endow the composite material with excellent thermal stability and flame retardance in a manner of cooperating with the DOPO through an intermediate.