18 results about "Substrate surface" patented technology

This invention relates to the field of coating technology, and discloses a deep-sea pressure-resistant hull protective coating and its preparation method, comprising the following steps: substrate treatment, sequentially adding epoxy resin-modified polyurethane, reinforcing filler, anti-corrosion filler, curing agent and solvent in a predetermined proportion and mixing evenly to obtain a primer, and spraying the primer onto the substrate; then using isoxazole-modified polyurea as a topcoat, spraying the topcoat on the side of the primer away from the substrate to obtain the protective coating. This protective coating has excellent waterproof performance, impact resistance, wear resistance and anti-bioadhesion ability, and can effectively prevent water, various corrosive factors such as ions in seawater, and various polluting organisms in seawater such as barnacles, mussels, oysters and sponges from contacting the substrate surface.

The invention discloses a green marine antifouling coating based on a urushiol-based eutectic solvent and a preparation method of the green marine antifouling coating, and belongs to the technical field of natural polymer antifouling coatings. The coating is composed of nano cuprous oxide, an auxiliary antifouling agent, an antibacterial agent, an auxiliary agent, a cross-linking agent, a photoinitiator, a urushiol-based eutectic solvent and an acrylate monomer. The preparation method of the coating is simple and convenient and comprises the following steps: mixing the components in proportion, coating the surface of a base material with the mixture, and curing by ultraviolet irradiation and baking. The coating is green and environment-friendly, free of emission of volatile organic compounds, high in raw material utilization rate, high in coating adhesion, good in mechanical property, synergistic and lasting in antifouling property, suitable for the field of marine antifouling and good in industrial popularization prospect and ecological application value.

The application provides a method for preparing a coating layer by using diatom shells and application, comprising the following steps: 1, adding distilled water into diatom mud or diatom dry powder, adjusting pH value by using strong acid, and then standing to obtain precipitate, centrifuging and washing the obtained precipitate to obtain primary diatom shells; 2, digesting or calcining the primary diatom shells to remove organic matter to obtain inorganic diatom shells; 3, mixing the inorganic diatom shells or the primary diatom shells with anhydrous ethanol and ammonia water to obtain diatom shell sol; and 4, coating the diatom shell sol on the surface of a substrate and heat treating to obtain a coating layer. The application utilizes the porous structure, large specific surface area and high light trapping efficiency of diatom shells, and prepares diatom shell sol by using diatom mud or diatom dry powder as raw material to form a coating layer on a substrate, without the need of complex pretreatment and modification steps, so that the coating layer has high light transmittance, hydrophobic characteristics, good antireflection effect, and is widely applied to solar cells, automobile, greenhouse and building glass.

The invention discloses a magnetic control underwater multiphase interface visible light permeability structure manufacturing and tuning method, relates to the technical field of underwater optical interface regulation and control, and solves the problems of irreversible interface morphology, limited dimming amplitude, poor underwater stability and the like in a traditional interface regulation and control system. The method specifically comprises the following steps: constructing a micro-column structure through femtosecond laser direct writing: processing the micro-column structure on a rigid substrate surface array by adopting a femtosecond laser direct writing technology; modifying the surface of the micro-column structure: performing super-hydrophobic treatment on the surface of the micro-column structure, and modifying the surface of the substrate to be super-hydrophobic; injecting ferrofluid: inversely immersing the modified micro-column structure substrate in water, and injecting oil base-ferrofluid into a micro-column structure area. According to the sandwich structure, reversible movement of the ferrofluid is achieved in the underwater environment, and the problem that a traditional liquid film or interface system is prone to collapse and unrecoverable is solved.

The invention provides an ocean concrete structure wet interface repairing construction method and a repairing material thereof. The repairing material is prepared from 100 to 150 parts of hydroxyl-terminated polydimethylsiloxane, 20 to 60 parts of butyl rubber, 30 to 80 parts of sulphoaluminate cement, 5 to 15 parts of cross-linking agent, 2 to 8 parts of latent catalytic system, 3 to 10 parts of tackifying resin and 20 to 100 parts of filler, wherein the latent catalytic system is prepared by complexing an organic tin catalyst and a chelating agent, long-term storage stability at normal temperature is realized, and a curing reaction is triggered under the combined action of moisture and temperature. According to the construction method of the repairing material, direct construction can be carried out under the wet interface condition that the water content of the surface of a base material is 5%-20%, drying treatment is not needed, the construction process is simple, convenient and rapid, and the method is suitable for in-situ repairing of a tidal range area concrete structure, an underwater concrete structure, an ocean platform pile foundation and wharf facilities; the coating can be constructed under the wet interface condition that the water content of the surface of a base material is 5%-20%, does not need drying treatment, and can be used for corrosion prevention and repair of marine concrete structures, crack sealing, damage repair and steel bar corrosion prevention and protection.

The invention discloses a gap feature filling method. The filling method comprises the following steps: at a first temperature, introducing a halogen group-containing surface reaction inhibitor, so that the halogen group-containing surface reaction inhibitor is reversibly adsorbed on active sites of gap characteristics to form a passivation layer; adjusting a deposition region of the introduced first precursor and / or second precursor in the gap feature via the barrier of the passivation layer; and in response to the deposition film morphology in the gap feature reaching the preset morphology, raising the temperature to a second temperature to remove the passivation layer. By executing the steps, the deposition reaction activity of a specific region in the gap feature on the surface of the substrate can be selectively and reversibly inhibited, the film forming defect of diffusion gradient can be fundamentally compensated, and a film layer with uniform height and excellent shape retention can be deposited in a high aspect ratio structure; and in the process of recovering the deposition reaction activity of the specific area, the operation is convenient, and damage or cross contamination cannot be caused to a substrate interface.

The application discloses a kind of undersea wireless power supply equipment bionic coupling prevents and removes marine life system and method, belong to marine engineering technical field.The system includes: bionic microstructure antifouling layer, it is set to the substrate surface of undersea energy equipment and seawater contact, the bionic microstructure imitates the microstructure of shark skin or dolphin skin, with specific rib width, height and pitch, for interfering the attachment and metamorphosis of marine larvae;Electrolytic antifouling unit, including at least one pair of electrodes arranged on the surface of the device, for electrolyzing seawater to generate trace sodium hypochlorite and hydrogen;And central control unit, electrically connected with electrolytic antifouling unit, for controlling the intermittent low-power operation of electrolytic antifouling unit according to the water quality parameters and timing strategy fed back by sensor;The application realizes efficient, long-acting, environmentally friendly antifouling and decontamination by the synergistic effect of physical bionics and green chemistry method, significantly reduces energy consumption and maintenance cost.

The invention discloses a preparation method of a high-salt-spray-corrosion-resistant coating on the surface of high-strength martensitic stainless steel, and belongs to the technical field of metal surface treatment. The preparation method comprises the following steps: firstly, performing heat treatment on a high-strength martensitic stainless steel matrix; and then a Cr layer, a Ni layer and a Mo layer are sequentially deposited on the surface of the base body through the physical vapor deposition technology, and the Cr-Ni-Mo-based alloy coating with the specific component gradient and the multi-layer structure is formed. The method is controllable in process and small in influence on a matrix, the prepared coating is compact and good in adhesive force, the corrosion resistance of stainless steel in the severe environments of high temperature, high humidity and high salt mist can be remarkably improved, the method is particularly suitable for surface protection of key parts of aviation equipment in the severe marine environments such as the South China Sea, the service life of the key parts is effectively prolonged, and the reliability of the key parts is effectively improved.

The application provides a kind of bacterial near-wall height measurement and three-dimensional reconstruction method based on fluorescence intensity calibration, the method comprises: constructing oblique incidence fluorescence microscopic imaging system, acquires the fluorescence image sequence containing standard microspheres fixed on the surface of substrate and moving bacteria;Based on the fluorescence image of standard microspheres, by extracting radial intensity distribution and combining spherical geometry, the quantitative calibration relationship between fluorescence intensity and vertical height is established;According to the calibration relationship, the instantaneous height of the moving bacteria is inversed, and the three-dimensional motion trajectory is reconstructed;Based on the rod-shaped geometric model composed of a cylinder and two hemispheres, the principal component analysis is carried out on the three-dimensional point cloud data to determine the long axis direction, the lower hemisphere model is fitted, and the minimum vertical distance between the lowest point of the lower hemisphere and the substrate surface is defined as the gap height.The application realizes nanoscale absolute height measurement, effectively compensates the laser power fluctuation and light bleaching effect, and can accurately analyze the spatial attitude of rod-shaped bacteria.

The present application provides a kind of gel material with lubrication and adhesion, comprising the following raw material components: polymerizable monomer, crosslinking agent, initiator and base oil;The mass ratio of the polymerizable monomer and the base oil is 1.1~5:1;The polymerizable monomer is selected from polymerizable monomer with hydrophobic side chain.The gel material provided in the application can maintain stable structure under complete water immersion conditions, has good adhesion to various substrate surfaces, and is not easy to fall off in complex underwater environment;Meanwhile, it also has self-lubricating function under the action of certain shear force, due to the special network structure in the gel material, so that its lubricating effect is durable, stable, not easy to be washed away by water flow and fail, and is very suitable for providing lubricating effect in underwater environment;In addition, the material also has certain corrosion resistance.

To provide a device or the like for use in protecting an item or the like immersed in an aquatic environment.SOLUTION: A treatment unit including at least one layer of a permeable fabric structure having an outer surface, an inner surface, and a plurality of pores extending therebetween, the permeable fabric structure having a biocide coating on the at least one surface extending at least partially into the plurality of pores, wherein the treatment unit is positioned at a water intake location of the water system, wherein all of the water passing through the water system passes through the treatment unit, and wherein the water requires an average residence time to pass through the treatment unit and the water system and to be discharged from a drain of the water system; Wherein the biocide coating elutes biocide into water passing through the treatment unit, wherein the biocide contacts at least one fouling organism in the water and reduces fouling on one or more substrate surfaces within the water system for at least an average residence time.SELECTED DRAWING: Figure 1A

This invention provides a strong-adhesion superhydrophobic antifouling coating for marine facilities and its preparation method, comprising the following steps: dispersing epoxy resin E51 and its curing agent in the solvent n-butanol, adding a predetermined proportion of silane coupling agent, and spraying the mixture onto the pretreated substrate surface to form an epoxy resin / silane coupling agent composite adhesive layer; uniformly spraying a mixed solution of PDMS prepolymer, PDMS curing agent, and hydrophobic silica micro / nano composite particles onto the incompletely cured epoxy resin / silane coupling agent composite adhesive layer using the same spraying process, and curing to obtain the superhydrophobic antifouling coating. Through the "molecular bridging" effect of the silane coupling agent, a strong and tough bond between the coating and the substrate is achieved; through the synergistic enhancement of micro / nano SiO2, the coating is endowed with excellent mechanical wear resistance and stable superhydrophobic properties. This coating is environmentally friendly, has a simple process, and is particularly suitable for long-term antifouling protection of marine facilities such as offshore wind power and coastal ports.

The invention discloses a laser-induced electrochemical deposition self-adaptive control method and system based on real-time feedback. The method comprises the following steps that the deposition morphology and process parameters of the surface of a base body in the deposition process are obtained in real time; based on the deposition morphology and the process parameters, generating an adjustment instruction by using a preset control algorithm; and process parameters in the deposition process are dynamically adjusted based on the adjusting instruction, and deposition self-adaptive control is completed. Through closed-loop feedback, disturbance caused by electrolyte concentration change, laser power fluctuation and the like can be automatically compensated, and it is ensured that key indexes such as deposition morphology and size in the whole machining process are highly consistent.

The invention relates to the technical field of marine organism fouling protection, and particularly discloses an antibacterial coating for preventing biological fouling and a preparation method thereof, the preparation method comprises the following steps: S1, adding brominated alkane and dimethylaminoethyl methacrylate into an organic solvent according to a molar ratio of 1: 1.2, and adding a small amount of hydroquinone to obtain a quaternary ammonium salt monomer; the brominated alkane is brominated dodecane, brominated tetradecane and brominated hexadecane; s2, adding a betaine monomer and gamma-mercaptopropyl siloxane into the quaternary ammonium salt monomer obtained in the step S1, and preparing a block modified oligomer under the protection of argon; s3, adding the block oligomer obtained in the step S2 into polydimethylsiloxane, and continuously stirring for more than 0.5 h to obtain a modified organic silicon prepolymer; and S4, uniformly coating the surface of a substrate with the prepolymer prepared in the step S3, and standing to obtain the antibacterial antifouling coating. According to the invention, attachment and growth of fouling organisms can be effectively prevented, and the coating is endowed with a good static antifouling effect.

The embodiment of the invention relates to the field of marine antifouling coatings, and discloses an antifouling protective layer for inhibiting adhesion of organisms on the surface of an offshore wind power foundation and a preparation method of the antifouling protective layer. The method comprises the following steps: firstly, adding epoxy modified polydimethylsiloxane, perfluoropolyether, gamma-(2, 3-epoxypropoxy) propyltrimethoxysilane into a reaction kettle, and uniformly stirring; mixing and dispersing with a biological microenvironment responsive controlled-release carrier to obtain a main agent of the antifouling paint; then, uniformly mixing the main agent with a polyamide curing agent, and coating the mixture on the surface of a base material to form a film through curing; wherein the controlled-release carrier takes amination modified mesoporous silica as a skeleton, and polyethylene glycol is loaded in the controlled-release carrier. The utilization efficiency of the antifouling agent is remarkably improved, the effective antifouling service life of the coating is remarkably prolonged, meanwhile, the excellent fouling and falling performance is achieved, no biocide is contained, and the coating is friendly to the marine environment.

This invention belongs to the field of surface engineering technology, specifically relating to a long-lasting anti-corrosion material surface suitable for marine environments and its manufacturing method. The material surface comprises a tiered micro / nano structure formed by in-situ etching of a substrate surface, a silica layer filling the pores of the tiered micro / nano structure, a methylated fluid-like m-PDMS coating grafted onto the silica layer surface, and a lubricating oil filling the pores of the m-PDMS coating. This invention proposes a long-lasting anti-corrosion material surface for marine environments, which can significantly improve corrosion resistance lifespan and possesses super-lubricating properties. When applied to ship hulls, it can provide advantages for drag reduction and energy saving.

The invention discloses a graphene modified marine anticorrosive paint based on dynamic covalent bonds, which takes a reversible cross-linked network as a core, and is prepared by the following steps: firstly, synthesizing two dynamic reaction precursors of furan functionalized methyl vinyl MQ type silicon resin and maleimide functionalized graphene oxide; then the furan group and the maleimide group are uniformly dispersed in a solvent and coated on the surface of a base material, a Diels-Alder cycloaddition reaction between the furan group and the maleimide group is triggered through heating, and a three-dimensional dynamic covalent cross-linked network is constructed in situ in the coating. According to the dynamic cross-linked structure, the interface bonding force of graphene and silicon resin is remarkably enhanced in a chemical bonding mode, filler agglomeration is avoided, the physical shielding and mechanical enhancement effects of graphene are fully exerted, the overall coating is endowed with excellent toughness, impact resistance and permeability resistance, and the service life of the coating is prolonged. And cavitation erosion in the marine environment can be effectively resisted, and the synergistic effect of scouring and corrosive media can be effectively resisted, so that long-acting and reliable anti-corrosion protection is realized.