1302 results about "Surface modified" patented technology

The present invention uses commercially available 3-aminopropylsilane coupling agent, diallylamino polyether acrylate, and an alkylating agent, or γ-propanesultone, or γ-butyrolactone as raw materials, and through an aza-Michael addition reaction and a quaternization reaction, a multifunctional silane coupling agent containing one or more quaternary ammonium cations, or sulfobetaine, or carboxybetaine in its molecular structure is prepared, which is used for the surface modification of bioactive glass, and the bioactivity, antibacterial and antifungal properties, and hydrophilicity enhancement effects after the surface modification of bioactive glass are obtained.

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.

A method includes forming a dielectric layer over a source / drain region. An opening is formed in the dielectric layer. The opening exposes a portion of the source / drain region. A conductive liner is formed on sidewalls and a bottom of the opening. A surface modification process is performed on an exposed surface of the conductive liner. The surface modification process forms a surface coating layer over the conductive liner. The surface coating layer is removed to expose the conductive liner. The conductive liner is removed from the sidewalls of the opening. The opening is filled with a conductive material in a bottom-up manner. The conductive material is in physical contact with a remaining portion of the conductive liner and the dielectric layer.

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 discloses a double-gradient high-temperature-resistant high-entropy alloy wear-resistant layer and an ultrasonic-assisted laser cladding preparation method thereof, and belongs to the technical field of metal material coatings and surface modification. A proper amount of refractory element W with anti-oxidation and solid solution strengthening effects is introduced into a CoCrFeNi high-entropy alloy coating, an ultrasonic-assisted laser cladding process is adopted, the wear-resistant layer with the grain size and the precipitated phase volume fraction in a gradient structure from exterior to interior is prepared, local stress concentration caused by W aggregation in the laser cladding process is improved, and the wear-resistant performance of the CoCrFeNi high-entropy alloy coating is improved. And the metallurgical bonding strength of the cladding layer and the matrix is improved, and the high-temperature friction and wear resistance of the cladding layer is enhanced. The cladding layer is fine and compact in structure, in gradient distribution, good in mechanical property and excellent in high-temperature wear resistance. The method is easy to operate and low in cost, and an effective method is provided for improving highly coordinated regulation of process-structure-performance and preparing the novel high-temperature-resistant high-entropy alloy wear-resistant layer.

The invention relates to the field of coating materials, and provides an antiskid coating based on carbon fibers and a preparation method thereof. The coating is composed of a component A and a component B, the component A comprises KH-570 silane coupling agent surface modified carbon fibers, dog bone-shaped nano silicon dioxide, epoxy modified hydroxy acrylic resin, quartz sand antiskid aggregate, propylene glycol methyl ether acetate, iron oxide pigment and other auxiliaries, and the component B is an HDI tripolymer curing agent. The surface modified carbon fiber is prepared through the steps of cleaning and activating, silane coupling agent dipping, drying and curing and the like, and the dog bone-shaped nano silicon dioxide is prepared through a sol-gel method with hexadecyl trimethyl ammonium bromide and polyvinylpyrrolidone as morphology guiding agents. The preparation method comprises the steps of iron oxide color paste preparation, functional component dispersion, quartz sand addition, curing treatment, double-component mixing and curing and the like. The coating has excellent dry skid resistance, wet skid resistance, wear resistance and durability, and is suitable for the field of ground skid resistance coating.

The invention discloses a preparation method of an interface self-reaction strong chemical bonding radiant heat protection multilayer gradient coating, and belongs to the technical field of coating surface modification. The invention aims to solve the problems that the existing coating is high in preparation temperature, long in period, high in cost and not suitable for industrial batch production, the interface bonding between the coating and a nickel-based high-temperature alloy matrix is poor, the coating is easy to crack and even lose efficacy due to mismatching of thermal expansion under high-temperature service, and the thermal protection performance of the traditional coating is insufficient. The interface self-reaction strong-chemical-bonding radiant heat protection multilayer gradient coating and a nickel-based high-temperature substrate are subjected to self-reaction at the interface to form strong chemical bonding, the bonding strength of the coating reaches 15 MPa or above, the emissivity value of the coating reaches up to 0.9, the structure of the coating is kept complete and does not fall off after the coating is oxidized in 1250 DEG C high-temperature static air for 30 h, and the coating has the advantages of being simple in preparation process, low in cost and the like. The method has application potential in a nickel-based high-temperature alloy anti-oxidation radiation thermal protection multifunctional integrated metal thermal protection system for a high-speed aircraft.

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 belongs to the technical field of metal surface treatment, and relates to a preparation method of a metal surface lattice passivation corrosion-resistant film, which comprises the following steps of: polishing and cleaning a metal surface, constructing a three-electrode system, and applying cathode voltage to the metal to carry out surface modification treatment so as to realize metal surface lattice reconstruction, thereby obtaining the metal surface lattice passivation corrosion-resistant film. A compact adsorption layer of corrosion inhibition molecules is formed; the three-electrode system comprises metal as a working electrode, a platinum sheet as an auxiliary electrode and silver / silver chloride or saturated calomel as a reference electrode. According to the method, metal surface lattice reconstruction is achieved through cathode voltage treatment, the technical thought of traditional anodic oxidation is subverted, the passive film forms a regular lattice structure, defects in the film are greatly reduced, permeation of a corrosion medium is effectively blocked, and the corrosion resistance of metal is remarkably improved.

The invention discloses a titanium-aluminum alloy surface high-temperature protection composite coating and a preparation method thereof, and belongs to the technical field of metal material surface modification. The thickness of the composite coating is uniform and controllable within the range of 2-6 microns, the composite coating is composed of three phases of TiSi2, Ti5Si3 and Al2O3, TiSi2 / Ti5Si3 is a continuous phase, and Al2O3 is a dispersed phase; the continuous phase TiSi2 / Ti5Si3 is in contact with and combined with a titanium-aluminum alloy matrix, and the dispersed phase Al2O3 is not in contact with the matrix. The preparation method comprises the steps that the titanium-aluminum alloy is subjected to pretreatment of cutting, polishing and cleaning; embedding into Si powder and SiO2 powder, and carrying out high-temperature diffusion in a vacuum environment. Compared with the prior art, the preparation process is simple and efficient, and the high-temperature protective composite coatings with different thicknesses can be prepared by adjusting the high-temperature treatment time.

The invention relates to the technical field of high polymer materials, and discloses a preparation method and application of polystyrene-divinyl benzene composite microspheres, and an environment-friendly solvent system, such as a water-based or non-toxic organic solvent, is adopted to replace a traditional organic solvent. The solvent pollution risk can be reduced by using water-phase emulsion polymerization, meanwhile, the recovery and treatment of the solvent are simplified, the surfactant is optimized, the low-toxicity and environment-friendly surfactant is selected for emulsion stabilization, and chemical substances harmful to the environment and the human body are prevented from being used. By optimizing a polymerization process, accurately controlling the crosslinking degree and introducing a green solvent and an environment-friendly surface modification method, the improved polystyrene-divinyl benzene composite microsphere overcomes some defects (such as high cost, non-uniform particle size, difficulty in controlling the crosslinking degree and the like) in the prior art; in addition, the method has wider application potential in a plurality of fields (such as coatings, medicines and catalysis), and has better environmental protection property, health safety and the like.

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 preparation method and device of a composite current collector, and the preparation method of the composite current collector comprises the following steps: carrying out baking treatment on a polymer film raw material to obtain a base film; the preparation method comprises the following steps: adding a pre-plating layer on the surface of a base film through pre-plating treatment, carrying out film plating treatment on one side, far away from the base film, of the pre-plating layer, and plating a metal thickening layer to obtain a base material; winding the base material to obtain a roll material, and after winding of the roll material is completed, slitting the whole roll material through a slitting machine to obtain a sub-roll material; and carrying out surface modification treatment on the split coil material to obtain the composite current collector. According to the preparation method of the composite current collector, a single evaporation process is adopted for film coating, the process is simple, the film coating efficiency is high, the film forming quality is high, the film coating efficiency is improved through one-time film coating on the front face and the back face, meanwhile, the interface bonding force can be improved through pre-coating in an induction type heating mode, and the film forming quality is improved. And the coating efficiency is ensured, and the coating quality is improved.

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 present invention relates to a method of manufacturing a surface-modified material wherein the method comprises the steps of applying a coating composition onto at least one surface of a substrate to form a porous coating thereon wherein the coating composition comprises mineral particles selected from the group consisting of calcium carbonate, calcium phosphate, hydromagnesite and mixtures thereof and a binder, and impregnating the porous coating with at least 150% by weight of an impregnating liquid composition based on the total weight of the porous coating to form a constraining liquid layer within and on the porous coating wherein the impregnating liquid composition is chemically inert to the substrate and the porous coating. Furthermore, the invention relates to a corresponding surface-modified material, an article comprising the same and the use of such a material.

The invention discloses an epoxy resin composition, a preparation method thereof and a wafer packaging structure, and the epoxy resin composition comprises 85-90% of modified silicon dioxide, 2-4% of epoxy resin, 1-2% of a curing agent, 2-4% of an epoxy active diluent, 0.1-0.2% of a dispersant, 2-5% of a solvent, 0.1-0.2% of a leveling agent and 0.05-0.1% of a coloring agent based on the total weight of 100%. Wherein the modified silicon dioxide is obtained by jointly performing surface modification on silicon dioxide by a silane coupling agent and a titanate coupling agent, and the modification ratio is 0.2-0.5%. The epoxy resin composition is appropriate in viscosity and good in leveling property, when the epoxy resin composition is applied to chip packaging, a formed film surface is smooth and free of cavities, the peeling strength between the film surface and a UV viscosity-reducing adhesive tape is small, and the UV viscosity-reducing adhesive tape is easy to tear off.

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 the technical field of heat-conducting materials, in particular to a heat-conducting silica gel sheet and a preparation process thereof, and the heat-conducting silica gel sheet is prepared from the following components in parts by weight: 100 parts of organic silicon rubber; 300-500 parts of a heat conducting filler; 3-8 parts of a curing agent; 1-3 parts of a catalyst; according to the invention, a composite system of silicon carbide particles with a specific crystal structure, surface-modified graphene sheets and nano-diamond particles is used as a heat-conducting filler, and the filler is subjected to accurate proportioning and surface treatment, so that not only is the heat-conducting efficiency greatly improved, but also the internal binding force and heat stability of the material are effectively enhanced; compared with a traditional heat-conducting silica gel sheet, the heat-conducting silica gel sheet can more effectively transfer heat and reduce thermal resistance under the same condition, so that the heat dissipation performance and operation reliability of electronic equipment are improved, and in addition, the heat-conducting silica gel sheet has good mechanical performance and machinability and is easy to adapt to various complex application scenes.

The invention relates to the technical field of photovoltaic cutting, in particular to diamond wire surface modification liquid, a preparation method of the diamond wire surface modification liquid, a modified diamond wire and a preparation method and application of the modified diamond wire. The diamond wire surface modification liquid provided by the invention comprises a component A and a component B, and the mass ratio of the component A to the component B is (40-80): (20-60); the component A is prepared from the following components in percentage by mass: 5 to 40 percent of titanium alkoxide, 2 to 30 percent of organic solvent and the balance of water; the component B is prepared from the following components in percentage by mass: 1 to 10 percent of polyphenol compounds and the balance of water. Hydrophilic modification is carried out on the diamond wire by adopting the diamond wire surface modification liquid, the liquid carrying capacity of the diamond wire is improved, it is guaranteed that components of the cutting liquid are effectively carried into cutting slits in the photovoltaic cutting process, and wire marks of silicon wafers in the production process are reduced; and the use amount of wetting components in the cutting fluid is reduced.

The invention belongs to the technical field of metal powder materials, and particularly relates to a preparation and surface modification method of silver-coated copper powder. Comprising the following steps that copper powder activated through a mixed acid solution and a dispersing agent are dissolved in ethyl alcohol, and copper powder turbid liquid is obtained; dropwise adding the silver complexing solution into the copper powder turbid liquid under the condition of water bath heating for reaction to obtain silver-coated copper powder turbid liquid; then, a reducing agent solution is dropwise added into the silver-coated copper powder turbid liquid, silver ions in the solution are further reduced, solid-liquid separation, washing and drying are conducted, and primary silver-coated copper powder is obtained; and finally, the silver-coated copper powder is subjected to surface modification, and the dispersity of the silver-coated copper powder is improved. The preparation method of the silver-coated copper powder provided by the invention is simple in process, and in the chemical oxidation reduction process, the prepared silver-coated copper powder is compact in silver coating, complete in coating, low in resistivity and good in oxidation resistance by regulating and controlling the concentration of silver ions and the complexing agent, the reaction temperature, the type of the dispersing agent, the dripping rate and the type of the surface modifier.

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 belongs to the field of ceramic and metal connection, and discloses a brazing part and a brazing process of a non-compact C / C composite material and a low-expansion alloy, the process comprises high-temperature infiltration treatment and brazing connection of the C / C composite material, and the high-temperature infiltration treatment is to carry out infiltration surface modification on the non-compact C / C composite material by adopting a silicon-titanium alloy; according to the high-temperature brazing connection, brazing is conducted through Cu-Sn-Ti brazing filler metal. The method can solve the problems that brazing filler metal easily permeates into the C / C composite material during brazing, the thickness of a welding seam is difficult to control, and the strength of a joint is low, and meanwhile, the density and the strength of the C / C composite material can be improved.

The invention discloses an anti-adhesion conductive ceramic coating and application thereof to a high-frequency electrotome, and relates to the technical field of surface modification. The preparation method of the anti-adhesion conductive ceramic coating at least comprises the following preparation steps: carrying out cleaning and surface sand blasting treatment on a high-frequency electrotome substrate; blending fusible polytetrafluoroethylene powder, hydrophobic nano silicon dioxide particles and modified fluorinated graphene at a high speed to obtain mixed powder; and the mixed powder is sprayed on the surface of the high-frequency electrotome base body subjected to surface sand blasting through a powder electrostatic spraying technology, and after baking and cooling, the anti-adhesion conductive ceramic coating is obtained. The high-frequency electrotome anti-sticking ceramic coating prepared by the invention has good anti-sticking property, tissue adhesion resistance, electrical conductivity and low possibility of falling off.

The invention discloses a hydrophobic coating with high corrosion resistance and long service life for an offshore photovoltaic support and a preparation method of the hydrophobic coating, and belongs to the technical field of surface protection of the offshore photovoltaic support. The concrete is prepared by mixing the following raw material components in parts by weight: 100 parts of a silicon-aluminum ingredient, 10-30 parts of an alkali activator, 1-2 parts of a water reducing agent, 0.3-1 part of a water-soluble polymer, 1-5 parts of an expanding agent, 0.5-2 parts of a surface modifier and 40-60 parts of water. According to the invention, corrosion ions in the marine environment are effectively prevented from invading, efficient protection of the offshore photovoltaic support and prolonging of the service life are realized, and the later maintenance cost is reduced.