274 results about "Prepared Material" patented technology

The invention relates to the technical field of refrigeration material preparation, in particular to an efficient passive radiation refrigeration material suitable for a sub-super environment and a preparation method and application of the efficient passive radiation refrigeration material. The method comprises the following steps: uniformly mixing thermoplastic polyurethane, sunlight high-reflection inorganic particles and a phase change material in a solvent; after a chemical foaming agent is added, the obtained suspension liquid is heated and foamed in a confinement mold, and wet gel is formed; and finally, carrying out freeze drying treatment to obtain the composite porous aerogel. The prepared material has a micro-nano porous skeleton formed by TPU, and inorganic particles and PCM are uniformly dispersed in the skeleton wall. Through component cooperation and a special porous structure, the material has extremely high sunlight reflectivity and mid-infrared emissivity, self-adaptive temperature regulation and control are achieved through PCM phase change, the problem that refrigeration of a traditional material fails in the sub-environment such as the vertical surface is effectively solved, and efficient sub-super-environment heat management is achieved.

The invention discloses a polyurethane foaming material with a gradient density skin-core structure and a preparation method thereof, and the preparation method comprises the following steps: step 1, injecting a mixed polyurethane foaming raw material into a preheated foaming mold, and closing the mold; step 2, synchronously starting a mold rapid cooling system and an air pressure balance system for foaming and curing when the reaction raw materials are injected; and step 3, taking out the product after curing, standing at room temperature, and curing to obtain the polyurethane foam material. The surface temperature of the mold is suddenly reduced through quenching temperature control so as to form a compact skin layer, and an in-mold pressure curve is controlled by using an air pressure balance program so as to accurately regulate and control foaming of a core layer. The prepared material has a continuous gradient density structure, the skin layer density is high, the core layer density is low, a transition interface with strong binding force is arranged between the skin layer and the core layer, and the extreme performance combination of'hard outside and soft inside 'is successfully realized.

The invention discloses a covalent organic framework with oxidation-reduction activity and a bionic nano-channel structure as well as a preparation method and application of the covalent organic framework, and belongs to the technical field of environmental protection. According to the preparation method, 2, 4-dihydroxybenzene-1, 3, 5-tricarboxaldehyde and 2, 5-bis (allyloxy) terephthaloyl hydrazine are taken as raw materials, a two-dimensional covalent organic framework with oxidation-reduction activity is synthesized, and then a sulfonic acid group with negative charges is covalently grafted, so that a functional material with a bionic nano-channel structure is formed. The material has regular porous channels and rich functional sites, the porous channels provide efficient mass transfer paths and adsorption spaces for uranyl ions, and the functional sites realize specific recognition of the uranyl ions through oxidation-reduction reaction and electrostatic interaction, so that the material shows synergistic advantages of strong selectivity, high adsorption capacity and rapid adsorption kinetics on uranium. The method is simple and low in cost, and the prepared material is clear in structure, good in hydrophilicity, capable of efficiently adsorbing uranyl ions and good in application prospect.

The invention discloses a double-station efficient numerical control processing machine which comprises a material storage bin, two material trays are arranged on the material storage bin, when one material tray is used for processing, the other material tray can synchronously carry out manual material preparation, and when the processed material tray is used up, a system is automatically and seamlessly switched to the material tray with prepared materials for continuous processing. The shutdown waiting time of a production line caused by manual feeding in a traditional mode is thoroughly eliminated, and the overall production efficiency is remarkably improved; meanwhile, a portal frame is arranged above the storage bin, a second moving unit is installed on the portal frame, and the two ends of the second moving unit are connected with mechanical arms. The traditional clamping jaw exchange mode depending on a rotating air cylinder is abandoned, a high-response and high-precision servo motor is adopted to drive a servo rotary table, the rotating angle of a clamping jaw air cylinder is precisely controlled, and the clamping jaw exchange efficiency is improved; high repeated positioning accuracy of the clamping jaw position and accurate positioning of any angle are achieved, it is guaranteed that the clamping jaw can rapidly and accurately reach the preset grabbing position every time, and the grabbing success rate and positioning consistency are greatly improved.

The invention relates to the technical field of wave-absorbing materials, in particular to a broadband wave-absorbing material and a preparation method and application thereof. According to the preparation technology of the wave-absorbing material, a non-woven fabric carrier with graded pores and continuous gradient distribution is constructed by virtue of induction of a centrifugal force field, and then the non-woven fabric carrier is placed in a magnetic dispersion liquid system to be subjected to impregnation ultrasonic dispersion load treatment, so that heterogeneous interface structures are constructed on the surfaces and the interiors of fibers, and the prepared material fabric has the characteristics of light weight and broadband wave-absorbing performance; the method is suitable for military and civil high-tech fields such as electromagnetic protective clothing and invisibility. The method has the advantages of short production period, high raw material utilization rate and the like.

The invention relates to the technical field of agricultural films, and particularly discloses a preparation method of a light nano regulating agent, which comprises the following steps: step 1, preparing materials: preparing an aluminate coupling agent and an inorganic nano material dispersing agent in a weight ratio of 2: 100; 2, mixing: stirring the raw materials prepared in the step 1 at a high speed, and fully mixing the raw materials to prepare a modified inorganic nano material dispersing agent; 3, the weight ratio of the color regulating agent to the modified inorganic nano material is 10: 100, and the light nano regulating agent is prepared after high-speed stirring and mixing; the inorganic nano-material dispersing agent is one or more of nano BaSO4, nano CaCO3 or nano SiO2, a high-speed stirrer is used for high-speed stirring in the step 2, the aluminate coupling agent reacts with hydroxyl or carboxyl on the surface of the inorganic nano-dispersing agent through alkoxy, and the hydrophilic nano-material is converted into organic affinity, so that the interface bonding force between the hydrophilic nano-material and the resin is enhanced; the light nano regulating agent has the characteristics of simple process and low cost, and the light conversion performance of an agricultural film can be improved by using the light nano regulating agent to prepare the agricultural film.

The invention belongs to the field of positive electrode materials, and particularly relates to a core-shell ferromanganese phosphate precursor, a modified lithium ferric manganese phosphate material, a preparation method and application of the modified lithium ferric manganese phosphate material and a lithium ion battery. The core-shell ferromanganese phosphate precursor comprises a core and a shell wrapping the core, and the core is Fe3 (PO4) 2; the shell is MnxFe1-x (PO4) y (ferromanganese phosphate), x is more than or equal to 0.1 and less than or equal to 0.9, and y is more than or equal to 0.67 and less than or equal to 0.75. The invention provides a core-shell ferromanganese phosphate precursor which takes Fe3 (PO4) 2 as a core and MnxFe1-x (PO4) y as a shell, and when the core-shell ferromanganese phosphate precursor is used for preparing lithium ferromanganese phosphate, the problem of component segregation is solved, and the Jahn-Teller effect of manganese is reduced; especially for subsequent doping and coating, doping segregation is expected to be reduced, coating interface impedance is reduced, and rapid charging of the prepared material and cycling stability under large current can be remarkably enhanced.

The invention discloses a preparation method of a high-strength corrosion-resistant PVDF-based composite material, and belongs to the technical field of composite materials. The method mainly comprises the following steps: (1) preparing surface nanocrystallization carbon fibers with SiO2 nano layers on the surfaces through alkali liquor activation, silanization and in-situ growth processes; (2) preparing fluorine-containing modified graphene oxide; (3) mixing the filler with PVDF resin, introducing a VDF monomer for in-situ polymerization, and constructing a chemical bonding interface; (4) respectively preparing outer layer slurry rich in nano TiO2, middle layer slurry rich in surface nanocrystallization carbon fibers and inner layer slurry rich in SiO2 coated Al2O3 core-shell nanoparticles by quantitatively supplementing specific filler; and (5) carrying out gradient tape casting, segmented drying, hot press molding and annealing treatment to prepare the composite material. The problems that a traditional PVDF material is weak in interface bonding and corrosion resistance and strength are difficult to consider at the same time are solved, and the prepared material has excellent mechanical strength and strong acid corrosion resistance.

The invention discloses a block magnesium-based composite material capable of quantitatively regulating and controlling the content of nano-particles and a manufacturing method of the block magnesium-based composite material, and belongs to the technical field of metal-based composite material preparation. The method comprises the following steps: providing a magnesium alloy substrate and a cover plate, determining the sectional dimension of a groove of the cover plate according to the volume fraction of target nanoparticles, processing the groove, then filling the groove with the nanoparticles, assembling the cover plate on the substrate in an inverted buckling manner to form a to-be-processed assembly, performing multi-pass stirring friction processing to form a first composite material layer, and stacking the first composite material layer as a new substrate layer by layer to form a second composite material layer; and finally, the target block magnesium-based composite material is prepared. Through the correlation design of the groove size and the target volume fraction, accurate control and uniform dispersion of the nano-particle content are achieved, the problems that a traditional method is high in defect rate, limited in size and the like are solved, the strength and plasticity of the prepared material are remarkably improved, the process is green and environmentally friendly, and the method is suitable for mass production of large-size components and can be popularized to various light metal matrixes; the application prospect is wide.

The invention provides an antibacterial antifouling material and a preparation method thereof, and belongs to the technical field of antibacterial hydrophobic materials. The preparation method comprises the following steps: reacting choline chloride serving as an antibacterial modification raw material with isocyanate to obtain acrylic acid esterified choline chloride, and carrying out ultraviolet curing in an ethanol solution by taking an acrylate compound and trimethoxyvinyl silane as hydrophobic raw materials to obtain the antibacterial antifouling material. The prepared material has good long-term antibacterial performance and antifouling performance, firstly, the material retains the antibacterial performance of a quaternary ammonium salt structure and has good hydrophobicity, so that the material not only has the antibacterial performance, but also has the good hydrophobicity, effectively prevents bacterial adhesion, increases the antibacterial effect and has the antifouling effect at the same time.

The invention relates to a preparation process of a sodium-ion battery hard carbon-based negative electrode material with high cycle stability, and the preparation process comprises the steps of biomass compound preparation, bamboo cane pretreatment, alkali lignin extraction, lignin purification, pre-carbonization, precursor preparation and carbonization, and creatively combines a doping method and a hydrothermal activation-carbonization method to synthesize a three-dimensional hard carbon material. The prepared material has the advantages of high cycle performance, stable rate capability, cheap and easily available raw materials, no pollution, low cost, long cycle life and the like.

The invention discloses a fused quartz ceramic material and a preparation method thereof, and relates to the technical field of fused quartz ceramics. The preparation method comprises the following steps: adding deionized water, a dispersing agent and a crystallization inhibitor into high-purity fused quartz (SiO2 content is greater than or equal to 99.9%) grading powder, mixing, grinding and drying to obtain fused quartz dry powder, adding a binder into the fused quartz dry powder, manually grinding and granulating to obtain granulated powder, and carrying out compression molding, glue discharging and sintering to obtain the fused quartz ceramic material. Through the three-stage grain composition design, the synergistic crystallization inhibitor and the two-stage sintering process, the technical defects that existing fused quartz ceramic is low in strength, poor in thermal shock resistance and prone to crystallization at the high temperature are overcome, the volume density of the prepared material is larger than or equal to 2.0 g / cm < 3 >, the bending strength is larger than or equal to 70 MPa, the water-cooling thermal shock resistance at the temperature of 1050 DEG C is larger than or equal to 50 times, and the thermal shock resistance is larger than or equal to 90%. The method is suitable for manufacturing precision structural parts in the fields of aerospace, semiconductors and the like.

The invention relates to the technical field of spacecrafts, in particular to a spacecraft defense material and a preparation method thereof, and designs a structure capable of effectively absorbing and dispersing impact energy on microscopic and macroscopic scales by utilizing computer simulation and an advanced material modeling technology. A base material with high strength, high toughness, light weight and corrosion resistance is selected, nanofibers, nanoparticles or nanosheet layers are embedded into the base material by utilizing a nanotechnology so as to enhance the mechanical property and the impact resistance of the base material, and the shape, the structure and the performance of the material are accurately controlled by adopting an advanced manufacturing technology. The prepared materials are stacked, bonded or mechanically connected together to form a final defense structure, and the structure is strictly tested. By combining a nanotechnology, composite material engineering and an additive manufacturing defense material, the deep requirement of a space exploration task is met, and the safety of astronauts and the smooth completion of the task are ensured.

The invention discloses a coal gangue-based porous adsorption material as well as a preparation method and application thereof, and belongs to the technical field of solid waste recycling and porous functional materials. The material is prepared by taking coal gangue as a main raw material through powder forming and heat treatment. The method is characterized in that one-way pressing forming is adopted and combined with a fibrous or sheet-shaped pore forming agent with the length-diameter ratio, so that the pore forming agent is directionally arranged in the pressing process, finally, an elongated pore structure preferentially oriented in the pressing direction is formed in the material, and the fluid permeability of the material in different directions shows remarkable anisotropy. The material has high porosity, appropriate mechanical strength and excellent directional mass transfer capacity. The method is simple in process and low in cost, and high-value utilization of the coal gangue is realized. The prepared material is particularly suitable for a fixed bed or a filtering device to treat industrial wastewater, and when the main flowing direction of the wastewater is consistent with the pore orientation of the material, the bed pressure drop can be effectively reduced, and the pollutant adsorption rate and the treatment capacity can be improved.

This invention provides a high-entropy titanium-aluminum alloy and its laser melt deposition preparation method, belonging to the field of alloy preparation technology. This invention utilizes laser melt deposition to prepare high-entropy titanium-aluminum alloys. Laser melt deposition has the advantages of a large temperature gradient and rapid cooling rate, thus the prepared materials often have fine grains, dense microstructure, and excellent mechanical properties. This invention combines titanium-aluminum alloys with high-entropy alloys, improving the overall strength of the alloy. Furthermore, due to the low density of titanium-aluminum alloys, the overall density of the alloy can be reduced, meeting the requirements for lightweighting. This invention changes the final composition of the high-entropy titanium-aluminum alloy by varying the powder feeding rate of different powder materials. Compared to laser melt deposition, which involves mixing powders of different contents and placing them in a powder feeding hopper, this invention saves the processes of weighing powder and mechanical mixing. Moreover, this method is more flexible in design and can produce alloys of different compositions in batches, with significantly higher efficiency than the mechanical powder mixing method.

The invention discloses a continuous flexible conductive material preparation device and method.The device comprises a continuous flexible material, a guide roller and a conductive coating assembly, the assembly is sequentially provided with a tackifying unit, a powdering unit, a curing unit, a chemical plating unit and a post-processing unit in the material conveying direction, the center lines of conveying channels of all the units are collinear, and the interface gap is smaller than or equal to 2 mm. The micro-nano metal powder seed source is planted through the powdering device, rapid growth and closing of the micro-nano metal powder seed source are achieved through chemical plating after solidification, a compact conductive network is constructed, and a finished product is obtained.The short-process, rapid, efficient and environment-friendly preparation of the continuous flexible high-conductivity material can be achieved, the prepared material is low in cost, good in conductivity and high in durability, material transmission deviation is avoided, and the continuous flexible high-conductivity material can be obtained. The method improves the compactness of the coating and the consistency of products, recovers redundant adhesion liquid and catalyst particles, reduces the production cost, and is suitable for preparation of continuous flexible conductive materials such as conductive yarns, fabrics and films.

This invention relates to the field of lithium-ion battery cathode material technology, specifically to a method for preparing and applying lithium manganese iron phosphate cathode material. The method for preparing the lithium manganese iron phosphate cathode material includes the following steps: (a) performing a first milling on a mixture containing a manganese source, a phosphorus source, a dispersant, and a ball milling aid to obtain a first slurry; performing a second milling on a mixture containing an iron source, a lithium source, and a carbon source to obtain a second slurry; (b) mixing the first slurry and the second slurry, followed by ball milling and drying to obtain a lithium manganese iron phosphate precursor; and (c) subjecting the lithium manganese iron phosphate precursor to two-stage sintering and pulverization under an inert atmosphere. The method for preparing the lithium manganese iron phosphate cathode material has advantages such as simple synthesis, low pollution, low process requirements, and good uniformity and conductivity of the prepared material.

The invention discloses a copper cyanoaurate hexagonal sheet loaded cuprous oxide material as well as a preparation method and application thereof. The copper cyanoaurate hexagonal sheet loaded cuprous oxide material comprises a copper cyanoaurate hexagonal sheet and cuprous oxide loaded on the copper cyanoaurate hexagonal sheet. According to the preparation method, copper ammonium chloride and potassium cyanoaurate are taken as raw materials, a copper cyanoaurate hexagonal sheet is prepared by a hydrothermal method, and then cuprous oxide is loaded on the copper cyanoaurate hexagonal sheet, so that the copper cyanoaurate hexagonal sheet loaded cuprous oxide material is obtained. The invention provides application of the copper cyanoaurate hexagonal sheet loaded cuprous oxide material as a catalyst for electrocatalytic reduction of carbon dioxide, and provides a gas diffusion electrode, and the catalyst in the gas diffusion electrode is the copper cyanoaurate hexagonal sheet loaded cuprous oxide material. The preparation process is simple and environment-friendly; the prepared material has higher ethylene selectivity and stability in the reaction of electrocatalytic reduction of carbon dioxide.

The invention relates to a preparation method for in-situ growth of a NiFeS nanosheet array by taking ZIF-67 as a template for integral water decomposition. The preparation method comprises the following steps: (1) treating cobalt nitrate and 2-methylimidazole by using a methanol solution to obtain ZIF-67 dodecahedron nanoparticles; then mixing the ZIF-67 and PDA in methanol, and carrying out water bath reflux to obtain Co (ZIF-67) (at) PDA for later use; and (2) putting the sample into a tubular furnace, and continuously calcining for 1 hour at 800 DEG C in an N2 atmosphere to obtain the Co-coated CN-800. And (3) carrying out hydrothermal reaction on the sample and a certain amount of FeCl3, Ni (NO3) 2, urea and NH4F to obtain NiFe-OH-Co-CN, respectively placing the prepared material and S powder in an upstream quartz boat and a downstream quartz boat of a tubular furnace, and keeping for 1 hour at 500 DEG C in an N2 atmosphere to obtain the NiFeS-Co-CN heterostructure.

The invention belongs to the technical field of metal-organic framework materials, and discloses a room-temperature mechanical ball-milling preparation method of a vitrified zeolite imidazate framework material, which comprises the following steps: respectively dissolving a zinc salt and an imidazole ligand in respective solvents, mixing for a period of time, separating, washing with ethanol for three times to obtain a ZIF material, and carrying out vacuum drying in a drying oven; and adding the dried ZIF material into a ball mill, dropwise adding a small amount of a sodium carboxymethyl cellulose aqueous solution, carrying out ball milling for a period of time, taking out, and drying to obtain the powdery glassy state zeolite imidazate skeleton structure material. According to the invention, the high temperature required by the original vitrification method can be reduced to room temperature through a simple operation method; the grain boundary impedance of the ZIF material can be eliminated, the electrochemical performance of the ZIF material is improved, and meanwhile, the completeness of a coordination framework structure is maintained; the prepared material is applied to a solid electrolyte of a lithium ion battery, and has the advantages that the ionic conductivity is greatly improved, the ion transference number is high, the electrochemical stability window is excellent, the cycling stability is good, and the like.

The invention discloses a method for preparing a carbon nanotube-based composite microsphere energy storage material through continuous flow. The invention discloses a preparation method for constructing a microspherical composite carbon nanotube supercapacitor material based on microfluidics, and belongs to the technical field of supercapacitors. The method comprises the following steps: acidifying carbon nanotubes to improve dispersibility; the preparation method comprises the following steps: by taking dimethyl silicone oil as an oil phase and acidified carbon nanotube dispersion liquid as a water phase, regulating and controlling a flow rate ratio through a microfluidic technology, and preparing carbon nanotube microspheres with uniform sizes; performing high-temperature pyrolysis to obtain a conductive microsphere framework; the MF-CNTs (at) ZIF-8 composite material is obtained by taking the MF-CNTs (at) ZIF-8 as a carrier, performing in-situ growth of ZIF-8 through a solution impregnation method and then performing secondary pyrolysis. According to the method, accurate and controllable preparation of the carbon nanotube microspheres is realized, and a conductive network of the carbon nanotubes and high specific surface area and pseudocapacitance activity of the ZIF-8 are synergistically exerted by combining in-situ compounding of the ZIF-8. The specific capacitance of the prepared material in a 6 M KOH electrolyte reaches 356.2 F.g <-1 >, the rate capability is excellent, and the capacity retention rate is 81.6% after 3000 cycles. The method has the advantages of controllable steps, mild conditions, low cost, easiness in continuous production and large-scale application potential.

The application belongs to the field of high polymer materials, and discloses a volatile-preventing and string-preventing high-barrier butyl rubber septum material and a preparation method thereof. The material comprises, by weight, butyl rubber 90-110 parts, modified sheet layer filler 5-12 parts, silane coupling agent containing dynamic bond 2-5 parts, polyisobutylene core-fluorine-containing hydrophobic shell core-shell microsphere 1-3 parts, vulcanizing agent 1.5-3 parts, vulcanization accelerator 0.8-2 parts, and activator 3-5 parts. By constructing a triple synergistic structure of "sheet layer directional barrier-dynamic interface plugging-matrix hydrophobic network interception", the penetration and stringing of volatile organic components in the sealing system are effectively inhibited. The preparation method comprises the steps of sheet layer filler modification, rubber matrix mixing, dynamic vulcanization and post-molding vulcanization, and has high controllability. The prepared material has excellent gas barrier property, puncture resistance and low-temperature elasticity, and is suitable for chromatographic sample bottle sealing systems.

The invention relates to the field of electronic equipment accessories, and discloses a manufacturing method of a magnetic attraction shell for electronic equipment, which comprises the following steps: S1, material sheet preparation: providing two groups of outer-layer material sheets, inner-layer material sheets and magnetic attraction parts, the density of the inner-layer material sheet is smaller than that of the outer-layer material sheet, the inner-layer material sheet comprises a peripheral material sheet and a filling material sheet, the density of the filling material sheet is smaller than that of the outer-layer material sheet and that of the peripheral material sheet, and the filling material sheet is arranged in the peripheral material sheet; s2, material sheet forming, wherein the prepared material sheets are stacked in sequence to form a material stack, the material stack is placed on a hot pressing ballast plate, and after the material stack is subjected to hot pressing for a certain time, a light plate is formed; and S3, shaping machining is conducted, specifically, appearance machining is conducted on the light board so that a product can be machined. According to the invention, after the outer layer material sheet forms the outer layer structure, the basic outer layer strength is maintained, the other parts facilitate the arrangement of the gasket and the magnetic block, and the overall weight can be reduced to a great extent; the weight of the product is greatly reduced by combining the filling material sheet with the lower density with the inner layer material sheet, and the light weight is realized.

The invention relates to a preparation method and antibacterial application of an adjustable manganese-based Prussian blue analogue. Through metal ion doping and lattice engineering regulation and control, a manganese element is introduced into a Prussian blue frame structure, and controllable regulation of the doping amount and optimization of a crystal structure are realized. The prepared material has excellent photothermal conversion capability and multienzyme simulation activity, and shows a photothermal-enzyme synergistic enhancement effect under the irradiation of near-infrared light. In-vitro studies show that the material can efficiently inhibit the growth of gram-negative bacteria; animal experiments further verify that the composition has a remarkable curative effect in infected wound repair. The invention not only provides a preparation method of a nano material with controllable metal doping, but also provides a novel photo-enzyme synergistic treatment method for drug-resistant bacterium infection treatment.

The invention discloses a method for preparing a light roadbed material from municipal sludge and fly ash, and belongs to the technical field of solid waste resource utilization. The method comprises the following steps: conditioning municipal sludge by using a dehydrating agent, and carrying out mechanical dehydration treatment to obtain absolutely dry sludge; the preparation method comprises the following steps: mixing 40 parts by weight of absolute dry sludge, 60 parts by weight of fly ash and 2-5wt.% of CaO fluxing agent, carrying out high-energy ball milling and sieving, mixing with a methylcellulose solution, and carrying out compression molding; and drying at 120-150 DEG C, heating to 1050 DEG C at the speed of 50-100 DEG C / min, carrying out microwave sintering, and cooling to obtain the light high-strength roadbed material. Through detection, the compressive strength of the prepared material reaches 19.98 MPa, the density is 1.54 g / cm < 3 >, the strength retention rate is 88% after 50 times of freezing and thawing cycles, and the leaching concentration of Cd and Pb is far lower than the limit value of GB5085.3-2007. According to the method, collaborative harmless and high-value utilization of the sludge and the fly ash is realized, and the obtained material is suitable for road subgrade filling.

This invention discloses a highly wear-resistant molybdenum disulfide / fluorinated graphene composite lubricant additive and its preparation method, comprising the following steps: dispersing an ionic liquid in distilled water, adding molybdenum disulfide to form a mixture, and then sequentially subjecting the mixture to ultrasonic treatment, multiple mechanical crushing treatments, and centrifugation, collecting the supernatant to obtain a molybdenum disulfide dispersion; dispersing an ionic liquid in distilled water, adding fluorinated graphene to form a mixture, then placing the mixture in an autoclave for hydrothermal reaction, followed by centrifugation, collecting the supernatant to obtain a fluorinated graphene dispersion; mixing the molybdenum disulfide dispersion and the fluorinated graphene dispersion at a mass ratio of 1 to 3:1, and ultrasonically treating the mixture to form a molybdenum disulfide / fluorinated graphene composite lubricant additive. The synthesis method of this invention is simple, the raw materials are widely available, the cost is low, and there is no pollution, making it more suitable for industrial promotion and application. The prepared material exhibits excellent stability and high wear resistance.

The application belongs to the technical field of material preparation, and particularly relates to a light-heat material with an antireflection coating and a preparation method thereof. Micron or nanometer magnetic particles are used as the core, and inorganic materials with antireflection function are used as the functional coating to coat the surface of the magnetic particles; wherein the functional coating is metal oxide or non-metal oxide with light reflection inhibiting function. The method is simple in operation, mild in reaction condition, and the prepared material has an antireflection coating, which can reduce the energy loss in the form of diffuse reflection on the surface of the material in the light-heat conversion process, and shows high energy conversion efficiency. In addition, the coating material is stable in chemical property, so that the prepared composite particles have certain oxidation resistance, and can be widely applied in the fields of paint and water treatment chemical industry.

The invention discloses a 1500 DEG C-resistant ceramic-based composite material and a preparation method thereof, and belongs to the technical field of high-temperature structural materials. The method comprises the following steps: selecting metal-doped high-temperature-resistant silicon carbide fibers to form a preform; depositing a Ti3SiC2 interface layer on the surface of the fiber, and carrying out heat treatment at 1200-1500 DEG C; and then sequentially carrying out chemical vapor deposition on a SiC matrix, dipping ceramic powder with slurry and dipping and pyrolyzing a metal modified precursor on the prefabricated body to obtain the final composite material. The composite material comprises a preform formed by the SA type fiber, a Ti3SiC2 interface layer covering the surface of the fiber, and a composite matrix filling and coating the fiber. Through the systematic design of the high-temperature-resistant fibers, the reinforced interface and the synergistic densification matrix, the prepared material has excellent mechanical properties and long-term stability in air at the temperature of 1500 DEG C, and is suitable for ultrahigh-temperature hot-end components such as aero-engines and gas turbines.

The application discloses a preparation method of a flame-retardant and antistatic degradable film. The film is prepared by blending PLA and PBAT, wherein the ratio of PLA to PBAT is 1:2-1:3. The PLA / PBAT blending system makes the prepared material have complete biodegradation capacity, which helps to improve the environmental problems caused by plastic pollution. The molecular weight of PLA and PBAT is increased by adding a chain extender, the physical performance and hydrolysis resistance of the material are improved, the crystallinity of PLA and PABT is improved by adding calcium carbonate, and the stability of the blending system is improved.

The invention discloses dielectric adjustable graphene / ceramic composite aerogel and a preparation method thereof, and belongs to the technical field of functional composite materials. The preparation method comprises the following steps: S1, mixing a reduced graphene oxide dispersion liquid with a silicon carbide whisker dispersion liquid, and carrying out ultrasonic treatment and centrifugation to obtain a composite precipitate; s2, performing directional freezing treatment on the composite precipitate, inducing to form a three-dimensional communicated porous structure, and then performing freeze drying to prepare a graphene / ceramic composite aerogel precursor; and S3, performing chemical vapor infiltration on the graphene / ceramic composite aerogel precursor to prepare the silicon carbide protective layer. The preparation method is simple, and the prepared material has excellent performances such as light weight, high strength, dielectric adjustability and high-temperature oxidation resistance, has application prospects in the fields of aerospace thermal protection and the like, and solves the problems that in the prior art, SiC whiskers are damaged in the preparation process, and the service life of the SiC whiskers is prolonged. The mechanical property, the dielectric property and the high-temperature oxidation resistance of the composite aerogel are insufficient, and the like.