304 results about "Hydrophobic surfaces" patented technology

The invention relates to a method and system for measuring the three-dimensional morphology of a metal hydrophobic surface based on white light microscopic interference, and belongs to the field of precision measurement, and the method comprises the steps: firstly, measuring a sample, scanning the surface of the sample, and synchronously collecting a white light interference image sequence containing surface contour information; adopting a bicubic interpolation algorithm to carry out interpolation processing on the acquired white light interferogram group, and constructing a high-resolution interference image sequence; analyzing the time-frequency domain interference signal through fast Fourier transform, effectively inhibiting noise interference in combination with a filtering technology, and accurately extracting an envelope curve of the interference signal; and carrying out Gaussian fitting on the envelope peak by adopting a least square method and positioning a peak value coordinate, and finally reconstructing a high-precision three-dimensional surface topography. According to the method, through advantage complementation of the bicubic interpolation algorithm and the fast Fourier transform method, the transverse resolution is remarkably improved while the longitudinal resolution is kept, and an effective technical means is provided for accurate characterization of the three-dimensional morphology of the metal hydrophobic surface structure.

A blood pump with a stator and rotor wherein the rotor is assembled by bonding the stator components with epoxy. The bonding surfaces of the rotor components are primed with a silane-based primer to improve adhesion between the primer and the rotor components by rendering such surfaces hydrophobic. A bonding surface of one of the stator yoke or the stator sleeve, or both, is treated with a primer that improves wettability of the bonding surface and improves bonding of the epoxy to the binding surface. The device has a bonding surface adhered to epoxy in which a primer was applied on such bonding surface prior to introducing epoxy onto the bonding surface. In addition to improved bond strength, hydrophobic surface would control moister ingress.

The invention provides a photo-thermal super-hydrophobic energy storage material, a preparation method thereof and application of the photo-thermal super-hydrophobic energy storage material in anti-icing and deicing, and belongs to the technical field of anti-icing and deicing. The photo-thermal super-hydrophobic energy storage material provided by the invention comprises an energy storage coating and a photo-thermal super-hydrophobic layer which are sequentially arranged from bottom to top, the energy storage coating comprises the following components: first resin and phase change energy storage microcapsules distributed in the first resin; the components of the photo-thermal super-hydrophobic layer comprise second resin and a photo-thermal inorganic material distributed in the second resin; the surface of the photo-thermal super-hydrophobic layer is provided with a micro-nano structure. Efficient anti-icing / deicing is achieved through the synergistic effect of the photothermal effect, the energy storage characteristic and the super-hydrophobicity, and the result of the embodiment shows that the anti-icing duration of the coating prepared through the method reaches 1.5 times that of a traditional super-hydrophobic surface. Meanwhile, under the illumination condition, the temperature of the coating can be increased to about 50 DEG C within 2000 s, and ice can rapidly fall off from the surface of the coating.

The invention belongs to the field of functional textile materials, and provides a directional moisture-conducting, dry, comfortable, breathable and quick-dry fabric and a preparation method thereof. A three-layer composite structure design is adopted, the outer layer is a gradient wetting structure formed by attaching a thermoplastic polyurethane film subjected to single-face thermal orientation treatment and knitted fabric, the middle layer is a hydrophilic non-woven fabric, the inner layer is a knitted fabric subjected to hydrophilic finishing, and the two layers are compounded through a hot melt adhesive dot-shaped net. Hydrophilic blocks of the thermoplastic polyurethane film are directionally enriched through single-face contact heating, gradient distribution with one hydrophilic side and one hydrophobic side is formed, and the hydrophobic surface is coated with a low-surface-energy coating. The fabric has excellent one-way moisture conduction performance, moisture can be rapidly transmitted from the inner layer to the outer layer and rapidly volatilized, dryness and comfort of the close-fitting fabric are kept, meanwhile, the fabric has good air permeability and quick-drying performance, the moisture conduction rate is increased by 30% or above compared with that of traditional fabric, and the fabric is suitable for being popularized and applied. The fabric has wide application value in the fields of sportswear, outdoor equipment, leakage-proof underpants and the like.

The invention relates to the technical field of super-hydrophobic anti-icing coatings, in particular to a low-temperature thermochromic super-hydrophobic anti-icing coating and a preparation method thereof. According to the specific technical scheme, low-temperature thermochromic phase change microcapsules and nanoscale hydrophobic silicon dioxide particles are dispersed in an organic solvent, an adhesive and a curing agent are added, and the super-hydrophobic surface with the micro-nano hierarchical structure, the latent heat regulation function and the temperature visual feedback function is constructed through a spraying method. The obtained coating has excellent super-hydrophobicity, and water drop adhesion can be effectively reduced; the phase change microcapsules contained in the coating release latent heat during low-temperature solidification, and surface temperature reduction and icing are remarkably delayed; and meanwhile, the color of the coating is obviously and reversibly changed along with the reduction of the temperature, so that the visual early warning of the low-temperature icing risk is realized. The problems that a traditional super-hydrophobic coating is insufficient in low-temperature anti-icing long-term effect and lacks an early warning function are solved, the super-hydrophobic coating is suitable for low-temperature anti-icing occasions, and the sensing-regulation-protection integrated function is achieved.

The invention discloses silencing and mildew-proof organic silica gel as well as a preparation method and application thereof, and belongs to the technical field of organic silicon binding material polymers. Comprising the following components in parts by weight: 35-45 parts of nano calcium carbonate, 32-40 parts of hydroxyl-terminated polysiloxane, 5-9 parts of silencing powder, 0.5-2.5 parts of glass fiber powder, 5-9 parts of a hyperbranched polymer, 2-5 parts of a hydrophobic surface modifier, 1.5-3 parts of color paste, 1-2 parts of a water-based coupling agent, 1-2 parts of a cross-linking agent, 0.5-2.5 parts of a mildew preventive, 0.4-2 parts of a composite titanide and 0.4-0.7 part of nano silver powder. According to the invention, the nano silver powder and the mildew preventive are compounded, and an inorganic sterilization system is combined, so that broad-spectrum environment-friendly bacteriostasis is realized, and high-humidity long-acting protection is met; the powder is subjected to hydrophobic treatment, moisture is blocked, and high adhesion is kept; silencing powder serves as a core, a sound absorption network is cooperatively formed, the noise reduction capacity is improved, and the device is suitable for multiple scenes.

The invention belongs to the technical field of construction of super-hydrophobic surfaces, and particularly relates to a preparation method of a super-hydrophobic coating with a multistage micro-nano structure. Comprising the following steps: pretreating a substrate; slowly adding the F-SiO2 nanoparticle dispersion liquid into the fluorine-containing glue solution under the synergistic treatment of ultrasonic and magnetic stirring to obtain an F-SiO2 / fluorine-containing glue composite solution; the method comprises the following steps: determining the actual glue coating amount based on the theoretical glue demand amount of a PDMS template, and coating the F-SiO2 / fluorine-containing glue composite solution on the surface of a substrate through spin coating to form a wet film; coining the wet film by using a PDMS template, and stripping the template after ultraviolet curing to obtain the super-hydrophobic coating with the multistage micro-nano structure. Based on an imprint method with insufficient glue amount, synchronous construction of a micro / nano dual-scale structure is achieved by accurately controlling the ratio of the volume of the coating liquid to the volume of the pore of the template and combining the curing shrinkage characteristic of the polymer, and the method has application potential in the fields of anti-icing, microfluid devices, marine antifouling and the like.

The invention belongs to the technical field of vehicle protection materials, and particularly relates to a coating for an explosion-proof vehicle. The coating is composed of an adhesion bottom layer, an energy-absorbing middle layer and an anti-impact outer layer, wherein the adhesion bottom layer contains epoxy resin and flaky zinc powder / mica powder, and a laminated shielding structure is formed to improve the adhesion force to be larger than or equal to 8 MPa; the energy-absorbing middle layer is a composite material of modified nano silicon dioxide / polyethylene glycol-based STF and silanized aramid fiber, the viscosity of the energy-absorbing middle layer is sharply increased by more than 50 times at the strain rate of 500s <-1 >, and 65% of explosion impact energy can be absorbed; the anti-impact outer layer adopts a polyurea elastomer to wrap gradient distribution silicon carbide microspheres, pyramid-shaped protrusions are designed on the surface, the fragment defense speed reaches 430 m / s, and the shock wave reflection dispersion is increased by 50%. The whole anti-explosion coating passes UL94V-0 certification through a synergistic flame-retardant system, the chemical protection and self-cleaning capacity is improved through a super-hydrophobic surface layer, and the problems that a traditional anti-explosion coating is poor in adhesive force, weak in composite threat resistance and insufficient in environmental adaptability are solved.

The invention relates to the technical field of breathable adhesive tapes, in particular to a double-layer composite high-breathability low-sensitivity adhesive tape and a preparation method thereof. The adhesive tape comprises a hydrophobic surface layer material, a high-breathability low-sensitivity composite adhesive and release paper. The high-breathability and low-sensitivity adhesive tape comprises a three-dimensional net-shaped breathable layer and a low-sensitivity adhesive layer. The hydrophobic surface layer material adopts a polyvinylidene fluoride electrostatic spinning nanofiber membrane with high specific surface area and porosity, so that the hydrophobicity and the adhesion with the lower layer material are improved; according to the high-breathability and low-sensitivity adhesive tape, polycaprolactone, a polylactic acid-glycolic acid copolymer and polyurethane are copolymerized to obtain a multifunctional three-dimensional net-shaped breathable layer; the high-breathability and low-sensitivity composite adhesive tape is prepared from dopamine modified polydimethylsiloxane microfibers decorated by oxidized dextran modified vinyl siloxane tip fibers, and the adhesive force and biocompatibility of the adhesive tape and skins with different roughness degrees are enhanced. Meanwhile, the lignosulfonate surfactant is added, so that the reproduction of bacteria and fungi in an adhesive tape attachment area can be inhibited.

The invention discloses an efficient flame-retardant waterproof and fireproof coating for a special humid environment and a preparation method, and relates to the technical field of waterproof and fireproof coatings, the waterproof and fireproof coating is prepared from a composite base material, a composite flame retardant, a nano waterproof agent, a moisture-proof auxiliary agent, a functional filler and a mixed auxiliary agent; the adhesive force and flexibility of the coating are synergistically improved through a molecular chain interpenetrating network, dual protection of a super-hydrophobic surface and a compact barrier layer is achieved in combination with a core-shell structure nano waterproof agent, a molecular-level moisture-proof barrier is constructed by adopting dual-intercalation modified bentonite, water vapor permeation can be effectively inhibited, and based on a ternary synergistic flame-retardant system, the flame-retardant performance of the coating is improved. An efficient expanded carbon layer is formed through coating modification and an eutectic structure, the fire endurance of the coating can be remarkably enhanced, in addition, the functional filler strengthens the mechanical property and the flame-retardant synergistic effect through multi-stage structural design and surface modification, the cross-linked network density is optimized in cooperation with gradient polymerization and irradiation curing processes, and the fire endurance of the coating can be remarkably improved. And finally, the bottleneck of performance degradation of the traditional coating in a humid environment is broken through.

The invention discloses a flexible anti-fouling and anti-drag composite coating with temperature responsiveness and a preparation method and application of the flexible anti-fouling and anti-drag composite coating. The flexible antifouling anti-drag composite coating comprises a substrate layer, a flexible buffer layer, an antifouling response layer and a hydrophobic surface layer which are sequentially formed on the surface of a base material, wherein the substrate layer comprises adhesive resin, a positively charged polymer and a particle filler; the flexible buffer layer comprises flexible polymer resin, a negatively charged polymer, a polymer drag reducer and an anti-ultraviolet additive; the hydrophobic surface layer comprises flexible polymer resin, a temperature-responsive polymer microcapsule encapsulated with an antifouling agent, a pore-foaming agent, an anti-ultraviolet additive and super-hydrophobic micro-nano particles. The flexible anti-fouling and anti-drag composite coating with temperature responsiveness provided by the invention has strong binding force with a base material, and also has anti-fouling property, corrosion protection property and anti-drag property; meanwhile, the preparation method provided by the invention has the advantages of wide application range, large-area coating and the like.

The invention discloses a breathable plant leaf biomimetic material with antifouling, self-cleaning and spectrum simulation properties and a preparation method of the breathable plant leaf biomimetic material. The breathable plant leaf biomimetic material can be applied to a base material through a two-step coating method. The first layer is a mesophyll-like porous dual-network hydrogel structure, hyperspectral pigment and moisture absorption salt are dispersed in the first layer, spectral characteristics of plant leaves in visible light and near infrared bands are simulated, and a water transpiration function controlled by plant pores is reproduced through a pore structure and a salt medium, so that stable spectral response and dynamic water exchange are realized; and the second layer is a leaf-skin-imitated coating, and has long-term stable antifouling and self-cleaning characteristics through a liquid-like super-smooth hydrophobic surface structure. The plant leaf spectrum simulation coating has anti-mud and hydrophobic properties, can still keep an excellent plant leaf spectrum simulation effect after being washed by rainwater, and can realize high-weather-resistance spectrum simulation.

The invention discloses an anti-icing testing method, device and equipment for a super-hydrophobic surface structure of energy equipment and a storage medium, and relates to the technical field of super-hydrophobic surface testing. Designing a super-hydrophobic surface structure based on the environmental main control factor to obtain a structure parameter set; simulating the super-hydrophobic surface structure by using an environment load condition determined based on the environment working condition matrix and a structure parameter set to obtain an equipment critical vibration frequency, and determining a current surface structure morphology based on the structure parameter set and the equipment critical vibration frequency; and determining a morphology simulation error based on the current surface structure morphology and the actual surface structure morphology of the super-hydrophobic surface structure, and monitoring the super-hydrophobic surface structure based on the morphology simulation error, the structure parameter set, the equipment critical vibration frequency and the preset control mechanical excitation frequency to obtain the ice growth rate and the ice adhesion work. The efficiency of anti-icing testing of the super-hydrophobic surface structure is improved.

The invention provides a self-repairing nano-composite heavy-load corrosion-resistant floor system and a preparation method thereof, a multi-layer gradient interpenetrating network structure comprises a bottom reinforcing layer, a middle barrier layer, a surface functional layer, a self-repairing module and an intelligent monitoring module, and the multi-layer gradient structure is combined with a porous framework and a nano-reinforcing material to form the self-repairing nano-composite heavy-load corrosion-resistant floor system. Compression resistance and impact resistance are obviously better than those of a traditional terrace, heavy-load working conditions can be borne for a long time, and high-strength load resistance is achieved; the directional barrier layer and the super-hydrophobic surface layer have a synergistic effect, so that corrosion media such as acid and alkali are effectively prevented from permeating, and the service life is prolonged; the microcapsules and the shape memory material are embedded, so that cracks of more than 0.2 mm can be automatically repaired, and the manual maintenance cost is reduced; the integrated sensor network feeds back the state of the terrace in real time, carries out real-time monitoring, carries out early warning on damage in time and triggers repair, improves the safety, is simple in process, adapts to a complex construction environment, and reduces the engineering difficulty.

The invention relates to a method for constructing a composite super-hydrophobic coating through double bonding. The preparation method comprises the following steps: taking a clean copper sheet which is not pretreated as a substrate, dipping the copper sheet in a suspension consisting of nanoparticles and sulfydryl-containing siloxane ethanol, taking out, washing, drying, dipping in a perfluoromercaptan ethanol solution, taking out, washing, and drying to obtain the copper-based super-hydrophobic surface coating. The coating prepared by the method has excellent super-hydrophobicity, icing resistance and stability. Different from an existing conventional preparation method, the method has the advantages that pretreatment operation such as abrasive paper polishing, strong acid etching or anodic oxidation does not need to be carried out on a copper sheet, and micro-nano roughening and low-surface-energy self-assembly can be completed on the copper surface only through two-step normal-temperature dipping. The method is simple in preparation process, mild in condition, free of expensive equipment, thin in coating thickness and small in influence on electric conduction and heat conduction of the copper substrate, intrinsic performance of copper can be reserved, the electric conduction / heat conduction characteristic of the copper substrate is considered, and the method has wide application value and prospects.

The invention relates to a bionic mist catching net material and a construction method and application thereof, and belongs to the field of air water collecting materials. The bionic mist catching net is a thermoplastic polymer fiber net, and radiation refrigeration particles are blended in fibers of the fiber net; and the part coated with the hydrophobic micro-nano coating and the part not coated with the hydrophobic micro-nano coating on the surface of the fiber net are alternately distributed. The radiation refrigeration particles are introduced into the bionic mist catching net material, and the hydrophobic coating is distributed on the surface of the bionic mist catching net material, so that the light reflectivity and the intermediate infrared emissivity are improved, and the radiation refrigeration efficiency is improved. Besides, the surface hydrophobic coating part forms a super-hydrophobic area, fog drops are promoted to be quickly coalesced into beads after collision, energy dissipation caused by spreading of a liquid film is reduced, the fiber substrate without the coating is kept hydrophilic, a heterogeneous wetting surface is formed, Laplace pressure difference is generated by surface energy difference at a hydrophilic-super-hydrophobic interface, and the super-hydrophobic surface is formed. The spontaneous migration of liquid drops from a super-hydrophobic region to a hydrophilic region is accelerated, and the water collection efficiency is remarkably improved.

The invention discloses a preparation method of a single-crack sensor, and relates to the technical field of crack strain sensors, and the method comprises the following steps: 1, carrying out fluorination treatment on a silicon wafer in a closed container for 3 h to obtain a hydrophobic surface; 2, mixing the PMDS main agent and the curing agent according to the mass ratio of 10: 1, and then stirring the mixture by using a centrifugal mixer until the mixture is uniform; after the mixture is uniform, putting the mixture into a vacuum chamber to eliminate bubbles; carrying out spin coating on the fluorinated silicon wafer at a speed of 150r / min for 60s, and drying in a drying oven at 80 DEG C for 2h to obtain a PDMS film; 3, cutting the PDMS film into long strips with the length of 30mm and the width of 7mm, and attaching a pre-designed metal mask structure to the central position of the PDMS; according to the invention, by controlling a single crack in the conductive layer, cracks are prevented from being generated at other positions, the SWCNT conductive network on the crack provides a stable conductive channel, and the prepared crack strain sensor has better stability while maintaining high sensitivity.

The invention discloses a graphene-containing polyurethane composite material with a light-heat-electricity-heat conversion and hydrophobic surface structure as well as a preparation method and application of the graphene-containing polyurethane composite material. The composite material sequentially comprises a pure polyurethane layer, a graphene-polyurethane composite material layer and a hydrophobic surface with a rough micro-nano structure from bottom to top. The bottom of the composite material is a pure polyurethane layer, so that efficient heat collection, temperature rise and heat slow release can be realized. According to the preparation method disclosed by the invention, the graphene is directionally arranged in the process of printing the molten graphene-polyurethane composite material layer by utilizing an FDM 3D printing process, so that the obtained composite material layer has a high anisotropic heat conductivity ratio. According to the method, the surface of the composite material is subjected to laser induction treatment by using high-energy beam irradiation, so that hydrophobic chemical components and chemical bonds on the surface of the material are increased, and a rough micro-nano porous structure generated on the surface of the material under the action of laser is combined, so that the composite material has a hydrophobic characteristic and has extremely high application potential in the field of all-weather deicing / anti-icing application.

The invention discloses a high-performance super-hydrophobic coating, and relates to the technical field of coating preparation. The high-performance super-hydrophobic coating comprises a composite resin matrix composed of polyurethane and polyethersulfone, and zinc selenide nanoparticles and hydrophobic modified inorganic micro-nanoparticles used for constructing a super-hydrophobic surface are dispersed in the composite resin matrix. Polyether sulfone has good tolerance, can significantly improve the thermal stability and structural strength of the coating in a high-temperature environment, and can be blended and crosslinked with a polyurethane network to form a more stable multiphase composite system, enhance the crack resistance and peel strength of the coating, and effectively improve the adhesive force; the zinc selenide nanoparticles can effectively absorb ultraviolet rays and protect the organic resin matrix from being damaged by ultraviolet radiation. The high-performance super-hydrophobic coating provided by the invention is suitable for outdoor severe environments with high temperature, strong ultraviolet radiation and chemical corrosion risk, and long-term stable protection can be provided for outdoor equipment by coating the surface of the outdoor equipment with the high-performance super-hydrophobic coating to form a protective coating.

The present invention discloses a bionic regulation method for a number of bounces of a droplet on a metal surface based on acoustic in-situ monitoring, which comprises the following steps: obtaining dynamic contact characteristics and acoustic properties of a solid-liquid interface of metal superhydrophobic surfaces with different surface information in the droplet bounce process based on an optical-acoustic synchronous in-situ testing system for droplet bounces; and obtaining a correlation among the metal superhydrophobic surface, the acoustic response and the droplet bounce behavior based on the dynamic contact characteristics and the acoustic properties of the solid-liquid interface, and machining and modifying a micro-nano structure of the metal surface by combining a coupled bionic concept according to the correlation. A scientific basis and a novel design method are provided for the bionic regulation of the number of droplet bounces over the metal surface.

The invention provides an anti-fouling self-cleaning powder coating and a preparation method thereof, and belongs to the technical field of powder coatings. The preparation method comprises the following steps: mixing the modified resin, the modified filler, the curing agent, the antioxidant, the flatting agent and the dispersing agent, and sequentially performing melt extrusion, tabletting, crushing and screening to obtain the anti-fouling self-cleaning powder coating. Structures such as a silane group, tert-butylphenyl and adamantane provide low surface energy to form a hydrophobic substrate, a multistage micro-nano coarse structure of the pretreated pollen provides a morphology basis for a super-hydrophobic surface, and after grafting treatment of hydrophobic groups of 1-adamantanol and hexamethylene diisocyanate, the hydrophobicity of the pretreated pollen is enhanced, so that the super-hydrophobic surface is formed. All the materials cooperate with one another to construct a'micro-nano binary structure 'similar to a lotus leaf, a super-hydrophobic surface is formed, pollutant attachment is reduced, and therefore the efficient anti-pollution self-cleaning effect is achieved.

The invention relates to the field of air conditioner condensate pipes, in particular to a super-hydrophobic self-cleaning PVC-U condensate pipe for an air conditioner and a preparation method of the super-hydrophobic self-cleaning PVC-U condensate pipe, and aims at solving the problems that an existing PVC-U condensate pipe does not have a super-hydrophobic self-cleaning function or is poor in self-cleaning function, and pipeline blockage and pipeline water leakage can be caused in the long-term use process. According to the preparation method, polyvinyl chloride resin is taken as a main raw material, hydrophobic titanium dioxide particles and a hydrophobic reinforcing agent are added into the polyvinyl chloride resin to realize a super-hydrophobic surface design and a self-cleaning function, so that dust, impurities and scale cannot be attached to the pipe wall of the condensate pipe, the smoothness of the condensate pipe can be kept, and the condensate pipe is effectively prevented from being blocked; corrosion and damage of the condensate pipe can be reduced, and the service life of the condensate pipe is prolonged; and the PVC-U condensate pipe is simple in preparation method and can be produced on a large scale, the operation cost is reduced, the service life of the pipe is prolonged, and the efficiency of the pipe is improved.

The present disclosure provides a full-dimensional hydrophobic radiation refrigeration cement coating and a preparation method thereof. The main raw materials of the coating are cement, functional fillers, micron / nanofibers, hydrophobic components and water. Unlike conventional hydrophobic surface paint which only has surface hydrophobic self-cleaning function, the full-dimensional hydrophobic radiation refrigeration cement coating of the present disclosure integrates radiation refrigeration and full-dimensional hydrophobicity, and can still maintain excellent self-cleaning and radiation refrigeration performance even after abrasion. The coating has a contact angle with water greater than 150°, and the overall reflectivity and overall infrared emissivity of the atmospheric window are both above 90%.

The invention discloses a passive radiation-evaporative cooling composite coating and a preparation method thereof. The passive radiation-evaporative cooling composite coating comprises a radiation cooling film on the upper layer and hygroscopic hydrogel on the lower layer. The radiation cooling layer with high sunlight reflectivity and high and medium infrared emissivity provides all-weather radiation cooling and protects the hydrogel on the lower layer from direct solar radiation; and the hydrogel can be evaporated and cooled in the daytime and can absorb moisture at night to realize self-regeneration. The invention has the advantages of low cost of required raw materials, simple preparation and large-scale production. The prepared double-layer cooling material has excellent and adjustable optical properties, the temperature of the double-layer cooling material is reduced by more than 15 DEG C under the direct irradiation of sunlight in the daytime, and meanwhile, the double-layer cooling material has a hydrophobic surface. As a refrigeration technology without power consumption and emission, the method is expected to reduce energy consumption and carbon emission of traditional refrigeration, and can be widely applied to spontaneous cooling of the surfaces of devices and facilities.

The preparation method comprises the following steps: preparing a flexible amino-terminated polyurea curing agent, preparing a low-modulus high-toughness epoxy primer and a high-modulus weather-resistant fluorocarbon finish, and preparing the self-deicing anticorrosive coating with a gradient modulus structure. According to the polar region self-deicing anti-corrosion coating prepared through the method, icing is delayed through the hydrophobic surface of the fluorocarbon finish paint; an ice-coating interface is wrinkled under an external force by utilizing the modulus mismatching of the finish paint and the primer, so that the interface controllable fracture self-deicing is realized; the compactness and hydrophobicity of the primer coating are enhanced by using the flaky interface reinforcing filler, and the flaky interface reinforcing filler cooperates with the finish paint to resist permeation of a corrosive medium, so that long-acting corrosion prevention is realized; in addition, a flexible chain segment and a polyurea toughening phase are introduced into the primer and are chemically bonded with the finish paint, so that the low-temperature toughness and the impact resistance are synergistically enhanced; the problem that the low-temperature mechanical property, the long-acting corrosion resistance and the lasting anti-icing property of a polar region coating material are difficult to consider at the same time is solved, and the deicing and anti-corrosion requirements of an upper-layer aluminum alloy building of a polar region ship can be met.

The invention belongs to the technical field of hydrophobic testing, and particularly discloses a method and system for testing the weather resistance of a super-hydrophobic surface of energy equipment in a natural environment, and the method comprises the steps: collecting the characteristics of the natural environment where the energy equipment is located, constructing a natural environment coupling model, and matching a weather resistance threshold set of the super-hydrophobic surface of the energy equipment; establishing an appearance-wetting-chemical three-axis characteristic space, outputting a dimensionality signal set of the super-hydrophobic surface of the energy equipment, analyzing a failure probability factor, determining a weather fastness judgment early-warning level of the super-hydrophobic surface, collecting geometrical parameters of the super-hydrophobic surface of the energy equipment, establishing a physical constraint boundary, and combining the failure probability factor to judge the weather fastness of the super-hydrophobic surface. And performing energy equipment super-hydrophobic surface optimization feedback. By constructing the natural environment coupling model and the three-axis feature space, the weather resistance of the super-hydrophobic surface of the energy equipment can be comprehensively evaluated, and accurate early warning and optimized feedback are achieved.

A biomimetic desert beetle self-transporting bone microgrinding head and a preparation process thereof, and relates to the field of medical instruments. The microgrinding head includes a hydrophobic matrix or a matrix having a hydrophobic plating layer. The matrix has a hydrophobic surface on which several hydrophilic abrasive particles are uniformly distributed. A process for preparing the microgrinding head is: selecting diamond abrasive particles and conducting oxidization treatment of the diamond abrasive particles; forming a hydrophobic matrix by scanning a surface of the matrix with a laser; or alternatively obtaining a hydrophobic plating layer by a chemical modification method; and combining the oxidized diamond abrasive particles with the hydrophobic matrix or the hydrophobic plating layer by electroplating to obtain a microgrinding head. The microgrinding head utilizes to achieve an effect of being capable of cooling rapidly and capturing cooling medium droplets and effectively transporting the droplets to a grinding arc region.

This invention provides a method for constructing boundary conditions for a superhydrophobic cylindrical surface based on OpenFOAM, comprising the following steps: (1) reading the parameter setting file; (2) obtaining the position of the center of the cylindrical surface; (3) finding the position of the center of the first layer of grid near the cylindrical surface and its tangential velocity; (4) finding the position of the center of the second layer of grid near the cylindrical surface and its tangential velocity; (5) calculating the sum of the distances between the center of the cell and the center of the cylindrical surface; (6) calculating and updating the velocity of the cylindrical surface; (7) performing flow numerical simulation, repeating S2~S7 until the calculation is completed. This invention is based on OpenFOAM and has been further developed to construct a superhydrophobic surface boundary condition suitable for flow around a cylinder. This boundary condition supports parallel computation of the entire calculation process, improving computational efficiency and the scale of the problem solution.

The invention relates to a modified high-wear-resistance rapid repair material and a preparation method thereof, and belongs to the technical field of composite materials. According to the invention, a long-chain alkyl structure is innovatively introduced into the curing agent, so that the hydrophobicity of the surface after the epoxy resin-based repairing material is cured can be effectively improved, and a slippage boundary effect is generated, so that the flow resistance of a fluid medium in repaired equipment is effectively reduced, and the friction force on the surface of the equipment is further reduced; the hydrophobic surface is also beneficial to inhibiting corrosion of an acid medium in the equipment to the repairing layer and the surface of the equipment and improving the durability of the repairing layer, in addition, a silane coupling agent kh-570 is grafted on the surface of the hard filler to modify the hard filler, the compatibility of the filler and an epoxy resin matrix is effectively improved, and the repairing effect is improved. The interaction between the filler and the epoxy resin matrix is enhanced, and the wear resistance of the epoxy resin repair material is effectively improved.

An apparatus for forming a plurality of microdroplets from a droplet includes a substrate, a dielectric layer on the substrate and having a plurality of hydrophilic surface regions spaced apart from each other by a hydrophobic surface, and a plurality of electrodes in the dielectric layer. The electrodes are configured to form an electric field (E) across the droplet in response to a voltage provided by a control circuit to move the droplet across the dielectric layer in a lateral direction (F) while leaving portions of the droplet on the hydrophilic surface regions to form a plurality of microdroplets on the hydrophilic surface regions.