954 results about "Surface modified" patented technology

The invention discloses a self-cleaning waterproof coating and a preparation method thereof, and relates to the technical field of waterproof coatings. Wherein the waterproof coating is prepared from organic silicon modified acrylic resin emulsion, a photocatalyst nano composite material, hydrophobic modified silicon dioxide aerogel powder, a nanofiber reinforced material, a dispersing agent, a coalescing agent, a thickening agent, a defoaming agent and deionized water; through the compatibility design of the core-shell structure photocatalyst and the super-hydrophobic silicon dioxide aerogel, multiple self-cleaning of adsorption, degradation and scouring is achieved, the durability and reliability of self-cleaning are remarkably improved, surface modified nanofibers are adopted as a reinforcing material, a three-dimensional network structure is formed in a coating film, and the self-cleaning performance is improved. And the flexibility of the organic silicon modified acrylic resin is synergistically complemented, so that the tensile strength and the deformation resistance of the coating are improved, the brittleness problem of rigid particles is avoided, and the durability of the coating is remarkably improved.

The invention discloses water-based wear-resistant ink and a preparation method thereof, and belongs to the technical field of ink. The ink is prepared from the following components in parts by weight: 20 to 35 parts of waterborne polyurethane resin, 15 to 25 parts of waterborne acrylic resin with an acid value of 40 to 80 mg KOH / g, 5 to 15 parts of KH570 silane coupling agent modified nano aluminum oxide, 3 to 8 parts of polyethylene wax emulsion, 10 to 20 parts of pigment and auxiliaries. The preparation method comprises the following steps: firstly, carrying out surface modification on the nano aluminum oxide by using KH570, and then mixing, dispersing and grinding all the components. Through the synergistic effect of the acrylic resin with a specific acid value and the modified nano aluminum oxide, the problem that nano particles are easy to agglomerate in a system is solved, the nano particles can be stably dispersed, and the interface bonding with the resin is enhanced, so that the ink is endowed with excellent adhesive force, wear resistance and storage stability while the process is simplified and the cost is reduced; the BOPP film packaging material is especially suitable for BOPP film packaging materials.

The invention discloses a synergistic compound light stabilizer for an automobile coating and a preparation method of the synergistic compound light stabilizer, and belongs to the technical field of coating additives. The light stabilizer comprises the following components in percentage by mass: 30-50% of a hindered amine light stabilizer, 20-40% of an ultraviolet light absorber, 5-15% of surface modified nano cerium dioxide, 5-10% of a hyperbranched polyester anti-migration aid and the balance of a solvent, wherein the ultraviolet light absorber is a mixture of benzotriazole and triazine in a mass ratio of (1: 1)-(1: 3); the particle size of the nano cerium dioxide is 10-50nm, and the surface of the nano cerium dioxide is coated with a silane coupling agent; the preparation method comprises the following steps: modifying the surface of nano cerium dioxide, shearing and dispersing multiple components at a high speed, and adjusting and filtering a solvent; the weather resistance of the automobile coating is remarkably improved and the service life of the automobile coating is remarkably prolonged through the synergistic effect of a plurality of light stabilizing components and the combination of the photocatalytic degradation capability of the nano cerium dioxide and the anti-migration characteristic of the hyperbranched polyester.

The invention discloses a high-refractive-index nano-composite optical adhesive and a preparation method thereof, and belongs to the technical field of optical transparent adhesives. The optical adhesive is prepared by taking a polyurethane acrylate oligomer with a specific structure as matrix resin, introducing surface-modified barium titanate and zirconium oxide core-shell nanoparticles as a functional filler, and matching with an active diluent, a photoinitiator and a silane coupling agent in a specific proportion. Through the design of the core-shell structure, the core problems that the high-refractive-index nanoparticles are easy to agglomerate in an organic resin matrix, the dispersion stability is poor and the bonding force with a matrix interface is weak are effectively solved. The prepared optical adhesive has a refractive index of more than 1.65, a light transmittance of more than 99% and a haze of less than 0.3% after being cured, has excellent bonding strength, weather resistance and long-term use stability, and is especially suitable for precise lamination of high-end display devices (such as OLEDs (Organic Light Emitting Diodes) and micro-lens arrays).

The invention discloses a graphite piece silicon carbide coating and a preparation method thereof, and belongs to the technical field of inorganic non-metallic materials. The method comprises the following steps: firstly, carrying out surface polishing, cleaning and drying pretreatment on a graphite piece; then a solution containing phosphinazine functionalized silazane and a boron-silicon carlamide compound is adopted for spraying the pretreated graphite piece, drying and curing are conducted, and a surface modification layer is formed; and finally, placing the surface-modified graphite piece in chemical vapor deposition equipment, and depositing at specific temperature, pressure and atmosphere to form the silicon carbide coating. According to the method, uniform nucleation and crystallization of the silicon carbide coating are effectively promoted through unique surface modification treatment, and the compactness and uniformity of the coating and the binding force of the coating and a matrix are remarkably improved. The obtained coating graphite piece has excellent thermal corrosion resistance, oxidation resistance and mechanical property, the service life and the use frequency of the coating graphite piece in semiconductor epitaxial equipment are remarkably prolonged, the whole preparation process is environmentally friendly, and the coating graphite piece is suitable for coating treatment of a large graphite base material.

The invention relates to the field of high polymer materials, and discloses a high-wear-resistance elastomer sole material and a preparation method thereof.The material comprises an elastomer matrix and surface-modified boron nitride nanosheets; the elastomer matrix comprises a first dynamic network and a second dynamic network which are formed through crosslinking of dynamic covalent bonds, and the first dynamic network and the second dynamic network are based on different types of dynamic covalent bonds and have different dissociation activation energy barriers or external stimulus response conditions. The surface-modified boron nitride nanosheet and the second dynamic network form a selective interface enhancement effect; the preparation method comprises the steps of polymer functionalization, nanosheet surface modification, melt blending reaction net forming, forming and the like. The obtained elastomer sole material not only has excellent wear resistance and mechanical properties, but also can realize self-repair of graded response aiming at damages of different degrees, and the service life of the material is remarkably prolonged.

The invention relates to the field of composite materials, in particular to wear-resistant paint for a drill rod, a preparation method of the wear-resistant paint, the drill rod with a surface wear-resistant coating and a preparation method of the drill rod. The preparation method of the wear-resistant coating for the drill rod comprises the following steps: S1, performing high-temperature oxidation treatment on composite powder of silicon carbide and diamond to obtain pretreated composite powder; s2, mixing the pretreated composite powder obtained in the step S1 with a silane coupling agent solution, heating and stirring, and then drying to obtain surface modified composite powder; s3, mixing epoxy resin with a toughening agent and a defoaming agent, heating, then adding the surface modified composite powder obtained in the step S2, uniformly mixing, and defoaming to obtain mixed slurry; s4, mixing the mixed slurry obtained in the step S3 with a curing agent, and defoaming to obtain the wear-resistant coating. The wear-resistant paint provided by the invention can form a coating with high wear resistance and high toughness on the surface of the drill rod.

The invention provides a grinding fluid, the grinding fluid comprises a base fluid, a grinding material, nano-diamond and a dispersion stabilizer, the base fluid comprises polyether and silicone oil, the grinding material comprises surface modified silicon carbide particles, and the dispersion stabilizer comprises polyethylene glycol stearate and polyvinylpyrrolidone. The surface roughness of a grinding piece can be reduced, the scratch density and microcracks of the surface are reduced, damage of grinding fluid to the grinding piece is reduced or even avoided, and the service life of a cutter can be prolonged. The invention also provides a preparation method of the grinding fluid and a process method using the grinding fluid.

The invention relates to the technical field of composite materials, in particular to a high-strength epoxy resin composite material and a preparation method thereof, and the high-strength epoxy resin composite material comprises the following raw materials in parts by weight: 50-80 parts of a base material, 10-20 parts of a curing agent, 5-10 parts of modified carbon nanotubes, 3-10 parts of a reinforcing sheet, 3-6 parts of a reinforcing material and 1-3 parts of a flame retardant. In the preparation method, the modified carbon nanotubes are in chemical bond connection with the base material through surface modification, the interface bonding force is enhanced, stress is effectively transmitted, the unique layered structure and surface modification treatment of the enhanced sheet are enhanced, the enhanced sheet is firmly combined with the resin matrix, and a three-dimensional enhanced network is formed through the synergistic effect of mechanical interlocking and stress dispersion. The vermiculite sheet layer prevents crack propagation, and the modified carbon nanotubes and the reinforcing material effectively transfer stress, so that the tensile strength and bending strength of the composite material are greatly improved, and the high-strength application requirement is met.

The invention discloses a surface-modified bioactive glass oral cavity desensitization paste and a preparation method thereof, and relates to the technical field of oral cavity desensitization pastes. The surface-modified bioactive glass oral desensitization paste is prepared from the following raw materials in parts by weight: 5 to 15 parts of bioactive glass, 3 to 6 parts of modifier, 3 to 5 parts of silicon dioxide, 20 to 30 parts of humectant, 0.5 to 1 part of sweetening agent, 0.5 to 1.5 parts of foaming agent, 0.5 to 2 parts of thickening agent and 60 to 120 parts of deionized water. The surface modified bioactive glass oral cavity desensitization paste prepared by the invention has excellent antibacterial performance and dentinal tubule sealing effect.

The invention provides a friction-resistant high-entropy alloy composite coating and a preparation method thereof, and belongs to the technical field of metal surface modification. A FeCoCrNiMox (x is greater than or equal to 0.18 and less than or equal to 0.25) high-entropy alloy is taken as a main component of composite powder, graphene is taken as an additive phase, and the FeCoCrNiMox high-entropy alloy composite coating is prepared on the surface of a matrix by adopting a laser cladding method. The graphene added in the composite powder can generate carbides in situ under the action of laser cladding, and second phase strengthening, solid solution strengthening and fine grain strengthening are generated, so that the friction resistance of the surface of the matrix is remarkably improved. The preparation method is easy to operate and low in cost, the prepared composite coating is high in bonding strength, good in toughness and plasticity and excellent in friction resistance, the surface performance of equipment can be effectively improved, safe and stable operation of the equipment is guaranteed, the service life of the equipment is prolonged, and maintenance expenditure is reduced.

The invention relates to a high-dispersity magnesium hydroxide flame retardant as well as a preparation method and application thereof. The flame retardant comprises a magnesium hydroxide crystal and a multifunctional composite group which is modified on the surface of the magnesium hydroxide crystal and is used for improving the flame retardant property, wherein the magnesium hydroxide crystal accounts for 90-98% by mass, and the multifunctional composite group accounts for 2-10% by mass; the multifunctional composite group is composed of an organosilicon group, an olefin group, a nitrogen-containing group, a hydrophilic group and a hydrophobic group. A magnesium hydroxide crude product is subjected to surface modification treatment by adopting the weakly hydrophobic and strongly hydrophobic modifiers, and wet modification and dry modification processes are combined, so that the distribution narrowness (span) of the flame retardant is improved, the dispersion effect and the compatibility of the material are further improved, and the overall flame retardant property of the material is remarkably improved; meanwhile, the mechanical property of the filling material is maintained or enhanced, and an innovative solution is provided for developing an efficient and environment-friendly polymer flame-retardant material.

The invention discloses an electrocatalytic oxidation flexible polishing method for smoothing the surface of a composite material, and belongs to the field of ultra-precision machining. The composite material workpiece is connected to the positive electrode of a power source, and a polishing solution supply pipe mixed with catalytic abrasive particles and an oxidizing agent is connected to the negative electrode of the power source; voltage is applied to the composite material workpiece, a polishing solution is sprayed to the surface of the composite material workpiece through a polishing solution supply pipe to form a closed loop, and then the surfaces of different phases of the composite material workpiece are modified into oxides with smaller performance difference through the electrocatalytic oxidation process; and removing oxides on the surface of the composite material workpiece by adopting a flexible polishing tool. According to the method, the surfaces of different phases of the composite material workpiece are modified into oxides with smaller performance difference through electrocatalytic oxidation, the initial performance difference between the different phases is weakened, inter-phase height difference effective smoothing and confinement electrocatalytic oxidation flexible polishing are achieved, the surface quality is improved, and the problems of surface scratches, subsurface damage and the like are solved.

The invention discloses a single-component high-heat-resistance type epoxy adhesive and a preparation method of the single-component high-heat-resistance type epoxy adhesive. The adhesive is prepared from the following components in parts by weight: 30 to 40 parts of N, N-4, 4 '-diphenylmethane bismaleimide; 50 parts of bisphenol F epoxy resin; 36.47 parts of 4, 4 '-diaminodiphenyl sulfone; 20 to 40 phr of phenyl glycidyl ether; 1 to 2 phr of two terminal type epoxy silicone oil; 4 to 6 phr of hydroxyl-terminated polyether sulfone; 10 to 20 phr of boron nitride, the surface of which is modified by gamma-glycidyl ether oxypropyl trimethoxy silane; and 1 to 3 phr of an adhesion promoter. According to the adhesive disclosed by the invention, the heat resistance, the mechanical property, the dimensional stability, the process adaptability and the like are synergistically improved, the use requirements of an aviation structural part on long-term service at 150-180 DEG C and an electronic packaging device on the condition of short-time reflow soldering at about 200 DEG C can be met, and the reliability of the adhesive in a high-temperature environment is remarkably improved.

The invention provides a surface modification method for a lithium-rich manganese-based positive electrode material, which comprises the following steps of: washing by using a peroxide-containing aqueous solution, properly increasing the washing temperature (preferably 40-80 DEG C), regulating the reaction pH value to 1-7, accurately controlling the ratio of acidity to free radical oxidation reaction, and optimizing the interface stability, oxygen vacancy density and Li < + > diffusion rate, thereby obtaining the lithium-rich manganese-based positive electrode material. Meanwhile, the dosage of peroxide (preferably persulfate) is reduced, the reaction time is shortened, the modification efficiency is improved, the raw material consumption is reduced, and the production cost is reduced.

The present application relates to the technical field of resin, and relates to a preparation method of high-whiteness resin, respectively preparing mesoporous SiO2@Eu 3+ The two whitening agents are mixed in a weight ratio of 1:1 to 1:4, surface modification is carried out, and then the whitening agents are melt-blended with a resin matrix; an intelligent control system is used to real-time regulate process parameters, so that the whiteness is greater than or equal to 96, and the thermal decomposition temperature is greater than or equal to 380 DEG C; the present application realizes the synergistic effect of the mesoporous SiO2@Eu 3+ The whitening agent and the TiO2 photonic crystal whitening agent synergistically act, and surface modification is carried out by using a silane coupling agent, so that the whitening agent is uniformly and stably dispersed in the resin matrix, the whiteness of the resin product is greater than or equal to 96, the risk of yellowing is reduced, and the visual appearance quality of the resin product is greatly improved.

A method for manufacturing a semiconductor structure includes: forming a first bonding layer on a device substrate, the first bonding layer including a first bonding sub-layer and a second bonding sub-layer, the first bonding sub-layer including a first metal oxide material in an amorphous state and a plurality of metal nanoparticles, the second bonding sub-layer including a second metal oxide material in an amorphous state; forming a second bonding layer on a carrier substrate, the second bonding layer including a third metal oxide material in an amorphous state; conducting a surface modification process on the first and second bonding layers; bonding the device and carrier substrates to each other through the first and second bonding layers; and annealing the first and second bonding layers to convert the first, second, and third metal oxide materials from the amorphous state to a crystalline state.

The invention discloses a processing method of a polybutylene terephthalate bar with laser etching performance, and relates to the technical field of high polymer material processing and surface modification.The processing method comprises the following steps that in the material melting stage, a synchronous observation system of a melt rheological behavior and a temperature field is established, micro-amplitude sine torque disturbance is introduced, and the temperature field is measured; obtaining dynamic response of viscosity and shear rate, and generating a flowing fingerprint baseline; and performing spectrum decomposition on the flow fingerprint baseline, extracting signal components causing pressure pulsation, determining a critical shear rate threshold and time delay thereof, and forming a discrimination condition of an unstable region. According to the method, shear characteristics are extracted through rheological disturbance and thermal field synchronous observation, space mask driving process simulation is constructed, a feedforward adjusting curve is output, density online estimation and phase recognition are introduced, micro-pulse disturbance and temperature fine adjustment are combined, closed-loop control is formed, melt flow is dynamically stabilized, and laser engraving consistency and the product yield are improved.

The invention relates to the technical field of composite materials, in particular to a composite material for a waterproof breathable film and a preparation method of the composite material. The composite material for the waterproof breathable film comprises the following raw materials: PTFE resin, zinc oxide, a surfactant, a compatibilizer and a waterproof filler, the waterproof filler is a porous inorganic carrier material treated by a silane modified waterproof agent; the silane modified waterproof agent is a compound containing a perfluoropolyether chain segment and a siloxane chain segment. According to the prepared composite material for the waterproof and breathable film, the porous filler is subjected to surface modification through the perfluoropolyether-silane coupling agent, and the waterproofness, breathability and mechanical property of the PTFE composite material can be synchronously and synergistically improved.

The invention belongs to the technical field of coating compositions, and discloses an electrophoretic coating with high weather resistance and high salt mist resistance and a preparation method thereof. According to the coating, a composite pigment and filler system formed by compounding a surface-modified sheet-shaped physical shielding filler and a calcium / zinc double-ion exchange type corrosion inhibition filler is adopted, and the surface-modified sheet-shaped physical shielding filler forms a compact labyrinth structure to prolong a corrosion medium permeation path; the corrosion inhibition filler releases Ca < 2 + > / Zn < 2 + > under the stimulation of chloride ions to generate a composite precipitation membrane in situ to block electrochemical corrosion; the two components are co-ground and pre-dispersed and chemically bonded with a resin matrix through a silane coupling agent, so that the compactness, the adhesive force and the self-repairing capability of the coating are improved. The electrophoretic coating does not contain hexavalent chromium and is suitable for high-end protection scenes such as automobiles and ocean engineering.

The invention belongs to the technical field of water-based ink, and provides high-temperature-resistant water-based ink for laminated iron and a preparation method thereof.According to the high-temperature-resistant water-based ink for laminated iron and the preparation method of the high-temperature-resistant water-based ink for laminated iron, the design of a double-resin system formed by compounding waterborne polyurethane resin and flexible segment copolymer modified ternary vinyl chloride-vinyl acetate resin is adopted, and the synergistic effect of surface modified nanometer aluminum oxide reinforcing filler and an elastomer modifier is combined; the interface compatibility is improved through a siloxane coupling agent surface treatment technology, a composite coating structure with balanced flexibility and heat resistance is formed, the high temperature resistance can reach 200 DEG C or above, continuous use is free of failure, the flexibility is free of cracking through a T-bend test, the adhesion of a coating film reaches the 0-level standard, the drying time is shortened to be within 30 minutes, and the service life of the coating film is prolonged. The comprehensive performance index that the storage stable period is prolonged to 12 months or above is achieved, the technical problems that an existing laminated iron coating is insufficient in flexibility and poor in thermal stability in a high-temperature environment are solved, and the high-temperature-resistant laminated iron coating has wide food packaging and industrial protection application value.

The invention relates to the technical field of ink preparation, in particular to a quantum dot-containing LED-UV anti-forgery ink formula and an in-situ modification preparation process thereof, and the quantum dot-containing LED-UV anti-forgery ink formula comprises the following components in parts by mass: 2-8 parts of core-shell structure quantum dots, 20-40 parts of LED-UV curing resin, 15-30 parts of a reactive diluent, 3-8 parts of a photoinitiator, 1-5 parts of a composite anti-forgery functional aid and 5-15 parts of a high-purity solvent. The quantum dots are uniformly dispersed in an ink system after being subjected to in-situ modification treatment, in-situ modification is realized through chemical bonding of a surface modifier and hydroxyl and amino groups on the surfaces of the quantum dots, and LED-UV cured resin, an active diluent and a photoinitiator cooperate with an LED-UV light source of 365-405 nm to perform in-situ surface modification on the quantum dots, so that the quantum dots are uniformly dispersed in the ink system. The fluorescent powder is tightly combined with a resin system through chemical bonding, so that agglomeration and migration are fundamentally prevented, and the uniformity and stability of the fluorescent property are ensured.

The invention discloses a high-rigidity and high-toughness polypropylene composite material and a preparation method thereof, the high-rigidity and high-toughness polypropylene composite material comprises 55-70 g of homo-polypropylene, 10-20 g of anti-impact co-polypropylene, 18-25 g of surface modified talcum powder, 3-6 g of chopped glass fiber, 8-12 g of ethylene-octylene copolymer, 3-5 g of maleic anhydride grafted polypropylene, 0.5-1.0 g of polyethylene wax, and 0.3-0.5 g of an antioxidant 1010 and 168 (1: 1) mixture. The invention realizes the following effects: 1, a robust rigid-tough balance design: a reinforcing system with high-content talcum powder as a main body and low-content glass fiber as an auxiliary is adopted to cooperate with a POE (ethylene-octylene copolymer) flexibilizer, so that good low-temperature impact toughness is maintained while the bending modulus stably reaches 2500MPa or above; 2, interface compatibility optimization: the interface combination of the inorganic filler and the matrix is improved through PP-g-MAH, and the dispersity and the mechanical property stability are improved; and 3, process control: through optimized temperature and vacuum degree control, degradation is prevented, good performance reproducibility is ensured, and industrial production is easy.

The invention relates to the technical field of material compositing, and discloses a polyurethane composite insulation board with a good flame retardant effect, which comprises the steps of fireproof surface layer pretreatment, flame retardant core layer preparation, reinforced substrate layer treatment, lamination molding and post-treatment, by designing a unique three-layer composite structure and adopting a multi-component synergistic flame retardant system, the flame retardant effect is good, and the flame retardant effect is good. The heat insulation board can form a multi-stage flame-retardant barrier when encountering high temperature and open fire, the flame spreading speed is slowed down, the overall fireproof safety of the material is improved, and the durability and stability of the flame-retardant effect are enhanced through the synergistic effect of all the functional layers; through surface modification treatment on the functional reinforcing phase, the interface bonding force between the functional reinforcing phase and a polyurethane matrix is improved, so that the flame retardant and the reinforcing phase are uniformly dispersed in the matrix, and the performance defect caused by agglomeration is avoided, thereby enhancing the mechanical strength and structural integrity of the material while keeping excellent thermal insulation performance.

The invention discloses a method for preparing a carbide coating with high bonding strength on a graphite surface. The method comprises the following steps: roughening the graphite surface to obtain roughened graphite, coating transition layer slurry on the roughened graphite surface, performing first sintering to obtain a transition layer, coating surface layer slurry on the transition layer surface, and performing second sintering to obtain the carbide coating. According to the preparation method, the synergistic effect of chemical bonding and mechanical embedding is achieved by optimizing the surface roughness, designing the transition layer and sintering the carbide coating, the carbide coating with the high interface bonding force is prepared on the graphite surface, and the preparation method is suitable for surface modification of graphite-based materials under the harsh working conditions of high temperature, high corrosion and the like.

Compositions and methods for use provide enhanced surface modification in leather care. In particular, the present disclosure is directed to water-based compositions including a silicone emulsion that delivers cleaning, protective, and preservative qualities.

The invention provides a preparation method and application of a wear-resistant and corrosion-resistant glass flake coating, and belongs to the technical field of coatings. The coating comprises a component A and a component B, wherein the component A comprises an epoxy resin matrix, a reinforcing filler, a self-repairing microcapsule and an auxiliary agent; the epoxy resin matrix is formed by compounding at least two different types of epoxy resin components, the first epoxy resin component is matrix resin, and the second epoxy resin component is toughening modified resin; the reinforcing filler comprises glass flakes subjected to surface modification, functionalized graphene and nano zirconium dioxide particles; the self-repairing microcapsule comprises a microcapsule wall and a self-repairing agent coated in the microcapsule wall; the auxiliary agent comprises a rheological auxiliary agent, a defoaming agent and a wetting dispersant; and the component B comprises a curing agent and a curing accelerator. The comprehensive wear resistance and corrosion resistance of the coating can be remarkably improved, and the construction adaptability of the coating is improved.

The invention relates to the field of energy storage batteries, in particular to a surface modification method of a carbon-based negative electrode material for a lithium ion battery and the carbon-based negative electrode material.The surface modification method comprises the following steps that S1, the carbon-based material, soluble saccharides, a lithium source and a solvent are mixed; s2, carrying out ball milling treatment on the slurry to obtain a precursor mixture; s3, calcining the precursor mixture to obtain a primary modified carbon material; s4, treating the primary modified carbon material in ozone to obtain an oxidation modified carbon material; and S5, dispersing the oxidation modified carbon material in a solution containing a conductive monomer and an oxidizing agent for chemical polymerization reaction, and depositing on the surface of the carbon material to form a polymer coating layer, thereby obtaining the surface modified carbon-based negative electrode material. By constructing a pre-lithiated carbon coated inner core and an ozone activation interface and preparing a modification layer of a conductive polymer, the core problems that a traditional carbon negative electrode is low in first efficiency, short in cycle life and poor in rate capability and is difficult to consider at the same time are solved.

The invention relates to an atomic layer etching system and method with a uniformity control mechanism. The ALE process includes a plurality of cycles, each cycle including a surface modification step and a sputtering step. The plasma source includes a center coil and an edge coil. The system supports the use of different selectable configurations in sputtering steps in different ALE cycles, capable of independently activating or closing the center coil and the edge coil. The flexibility provides a mechanism for adjusting the etching rate of the center and the edge of the substrate, so that non-uniformity (such as thickness difference) of the substrate to be processed is compensated. The system controller can generate a process formula based on the to-be-processed substrate data and the output specification so as to ensure that the etching process meets the expected performance requirement.

The invention belongs to the technical field of laser printing, and particularly relates to a laser additive manufacturing method and a laser additive manufacturing device. The laser additive manufacturing method comprises the following steps that S1, a printing material is melted through a melt extrusion structure, the melted printing material is extruded to a bearing platform according to a preset path, and a first additive layer is formed; s2, a metal layer is laid on the first additive layer through a wire feeding structure; s3, modifying the surface of the metal layer through a laser generation structure; and S4, a second additive layer is printed on the metal layer through the melt extrusion structure, and the second additive layer covers and adheres to the metal layer and the first additive layer. The mechanical strength of the resin material can be improved, so that the interlayer bonding strength is high, obvious anisotropy is avoided, the use of a high-strength printing material is avoided, and the metal layer is beneficial to control and reduction of the printing cost.