139 results about "Biofouling" patented technology

The invention relates to the technical field of ship energy efficiency analysis, and particularly discloses a digital twinning-based bulk carrier EEDI pre-evaluation and design optimization method and device, and the method comprises the steps: carrying out the multi-source data collection, building a ship full life cycle database, building a high-precision digital twinborn body based on transfer learning calibration, coupling target port tide time series data, and carrying out the design optimization. The influence of dynamic water depth and water flow changes on a ship navigation strategy is simulated, the whole-course navigational speed is optimized to reduce the total oil consumption, a hull biological pollution bottom growth model is introduced into energy efficiency evaluation, the energy efficiency attenuation trend of the whole life cycle of the ship is predicted, and an operation EEDI index is generated through multi-physics coupling simulation. And multi-target collaborative optimization is carried out in combination with maneuverability safety evaluation, so that the problems that traditional EEDI evaluation is separated from actual operation conditions and neglects tidal window matching and hull energy efficiency attenuation are solved, and accurate prediction and collaborative optimization of the energy efficiency and safety of the whole life cycle of the ship from a design stage are realized.

The invention discloses a multi-spectral image fusion building surface biological attachment area detection method and device and a medium, relates to the technical field of image processing, and discloses a multi-spectral image fusion building surface biological attachment area detection method comprising the following steps: based on a to-be-detected building, obtaining a visible light image collected by a visible light camera of an unmanned aerial vehicle, the multispectral camera acquires a multispectral image sequence based on at least two different frequency bands; registering the visible light image and the multispectral image based on a calibration and preprocessing module to obtain a pixel-level aligned visible light image and multispectral image sequence; and according to a deep learning feature identification module, identifying the visible light image and the multispectral image sequence after pixel-level alignment, and obtaining a pixel-level segmentation result of the organism attachment area of the to-be-detected building. Therefore, detection is carried out based on the unmanned aerial vehicle, deep learning and an image feature fusion mode are combined, and the building surface bioattachment recognition accuracy is improved.

The invention relates to the technical field of ocean engineering equipment, in particular to a marine organism cleaning floating ship used at a cold source water intake of a nuclear power station, which comprises a buoyancy platform, four hydraulic winches are mounted and connected on the buoyancy platform and are distributed at the left upper corner, the right upper corner, the left lower corner and the right lower corner of the buoyancy platform; the buoyancy platform is provided with a cleaning suction device used for cleaning marine organisms on the intercepting net, the buoyancy platform is further connected with a discharging pipeline with a downward outlet, the cleaning suction device is provided with a suction pipe, and the flow of the suction pipe can be changed. The cleaning suction device is further provided with a cleaning brush capable of washing marine organisms on the intercepting net, and the cleaning effect is better optimized.

The present invention generally relates to a process for fabricating a reduced graphene oxide (rGO)-based antifouling marine coating is disclosed. The process begins with preparing a dispersed graphene oxide solution, followed by chemical reduction using hydrazine hydrate at 90-95° C. for 3 hours to form a dispersed rGO solution. This solution is then washed, filtered, and sonicated for 6 hours to ensure stability. A polymer solution is prepared by dissolving 40-50 wt % epoxy resin in acetone at 50° C. The antifouling composite is then formed by combining the rGO solution, 10-15 wt % zinc oxide nanoparticles, and 1-5 wt % carbon nanotubes with the polymer solution, followed by 6 hours of sonication at room temperature. Finally, the resulting composite material is applied to a substrate as a coating using spraying, brushing, dipping, or spin coating. This coating offers a promising solution for preventing biofouling on marine structures.

The invention belongs to the technical field of underwater detection, and discloses an intelligent detection method and system for appearance defects of a multi-biological attachment pier, and the method comprises the steps: obtaining multi-modal image data, carrying out the feature-level registration, splicing the registered multi-modal images, and obtaining a fusion feature; obtaining a high-level semantic feature based on the fusion feature, obtaining a first feature map based on the high-level semantic feature and the fusion feature, and generating a pier surface biological attachment mask based on the first feature map; based on the advanced semantic features and the attachment mask, reconstructing a clean pier surface image without biological attachments; on the basis of the cleaned pier surface image, identifying and segmenting apparent defects of the pier surface; and defining a loss function, and training the intelligent detection model to obtain a trained intelligent detection model. According to the method, the accuracy and robustness of defect detection are remarkably improved, meanwhile, the dependence on manual annotation data is reduced, and a feasible intelligent solution is provided for structure detection in an underwater complex scene.

The invention belongs to the technical field of protective coatings, and particularly relates to a modified polysilazane-based protective coating, a preparation method thereof, a protective coating and application thereof. The modified polysilazane-based protective coating provided by the invention is prepared from the following preparation raw materials in parts by mass: 5.0 to 15.0 parts of polysilazane, 1.0 to 5.0 parts of a low-surface-energy compound, 1.0 to 5.0 parts of a hydrophilic compound, 1.0 to 5.0 parts of a silane coupling agent, 0.01 to 0.1 part of an initiator and 60.0 to 80.0 parts of a dispersion medium, both the low-surface-energy compound and the hydrophilic compound contain groups for free radical polymerization reaction. A protective coating formed by the protective paint provided by the invention has good environmental adaptability, and can simultaneously realize multiple effects of friction resistance, corrosion resistance, adhesion resistance, biological fouling resistance and the like when used under harsh working conditions (air / underwater environment).

The invention discloses an antibacterial coating for a concrete surface as well as a preparation method and application of the antibacterial coating, and relates to the technical field of functional polymers. The antibacterial coating for the concrete surface is prepared from the following raw materials in parts by weight: 100 parts of a monomer mixture, 0.7 to 3.1 parts of an initiator, 0.3 to 2.0 parts of a chain transfer agent and 75 to 125 parts of a solvent, wherein the monomer mixture comprises a methacrylate monomer, an acrylate monomer, sodium acrylate, a urea methacrylate monomer and a capsaicin derivative in a molar ratio of (12-60): (20-60): (2-10): (2-10): (1-5). The antibacterial coating for the concrete surface is easy to prepare and operate, low in cost and environmentally friendly, and raw materials are easy to obtain; the capsaicin derivative monomer is introduced into the antibacterial coating for the concrete surface, so that the antibacterial activity of the resin is improved, and the problem of biological fouling of a concrete structure in marine infrastructure is solved.

The invention discloses a modified red mud-epoxy resin composite coating as well as a preparation method and application thereof. The composite coating is prepared by mixing modified red mud serving as a functional filler with epoxy resin and a curing agent, the composite coating is applied to the surface of Q235 carbon steel as a bifunctional corrosion-resistant and biological fouling-resistant composite coating, and shows remarkable corrosion resistance and biological fouling resistance; the impedance radiuses of the composite material can respectively reach 8.37 * 10 < 9 > omega.cm < 2 > and 2.69 * 10 < 6 > omega.cm < 2 > after the composite material is soaked in a 3.5 wt% NaCl solution for 1 day and 60 days; besides, the red mud / epoxy resin composite coating generates an active substance (. O2 <->) through a photo-induced electron-hole pair and a redox reaction, so that growth of bacteria (such as escherichia coli and staphylococcus aureus) and algae (chlorella) can be effectively inhibited, and excellent biological fouling resistance is shown.

The application provides a solid super-smooth surface and a construction method and application thereof, and relates to the technical field of marine antifouling. The solid super-smooth surface constructed by the application is composed of linear polyfluorosiloxane, the linear polyfluorosiloxane is combined with a substrate through a chemical covalent bond, the chemical covalent bond is firm, the problem that traditional biomimetic super-smooth surface lubricating oil is prone to loss in an underwater environment is solved, and the solid super-smooth surface has a longer performance of preventing and treating biological fouling. The solid super-smooth surface provided by the application has a linear structure and reliable underwater transparency, and the underwater visible light transmittance of the material can reach more than 95%.

The present invention deals with the development of novel nanocomposite paints for biofouling removal coatings, which result from the mixing of two components, where the first component is an epoxy resin (component A) and the second component is a suitably modified polymerization agent (hardener). These hardeners are modified with hydrophobic nanoparticles based on functional dendritic polymers with symmetric or asymmetric architecture or based on functional inorganic nanoparticles (metal or metalloid nanoparticles or a mixture thereof). Both the polymeric nanoparticles and the inorganic nanoparticles were modified with suitable lipophilic groups. These nanocomposite paints addressed by the present invention exhibit organic microfilm control properties and can be effectively applied to objects immersed in seawater as biofouling removal coatings.

The invention belongs to the technical field of biofouling prevention sensors, and particularly relates to a polymer film sensing chip as well as a preparation method and application thereof. The polymer film sensing chip provided by the invention comprises a flexible substrate, an indicator electrode conducting layer, an indicator electrode sensing film, a reference electrode conducting layer, a reference electrode sensing film and a flexible packaging layer which are arranged on the surface of the flexible substrate, and a self-adhesion hydrogel layer arranged on the outermost layer, the material of the self-adhesion hydrogel layer comprises catechol type hydrogel, chitosan type adhesion hydrogel, polypeptide type hydrogel or hyaluronic acid type hydrogel. The self-adhesion hydrogel layer in the polymer film sensing chip provided by the invention contains a large number of hydrophilic functional groups and has excellent hydrophilic performance, and a water layer structure can be formed between the surface of the polymer film and fouling organisms so as to hinder the adhesion of the fouling organisms. The polymer film sensing chip provided by the invention has good ion permeability and mechanical strength, and can effectively inhibit adhesion of fouling substances.

The application provides a kind of micro electric perturbation bionic antifouling surface and its preparation method.The antifouling surface takes the dynamic epidermal structure of cetacean skin as the bionic prototype, can simulate the reversible macroscopic mechanical deformation and microscopic fluid flow of cetacean skin under the action of external electric stimulation, effectively prevent microorganisms from adhering to the material surface.The antifouling surface is prepared from hydrogel, electrode and low surface energy antifouling surface layer material.Because the antifouling surface is constructed based on electroosmosis effect, the surface can realize excellent deformation performance under ultra-low voltage (<3V).The antifouling surface belongs to pure physical anti-biofouling, avoiding the harm of biochemical reagents to the environment.The antifouling mechanism driven by electroosmosis allows dynamic control of antifouling effect, and optimizes the antifouling performance in different environments by adjusting voltage and current.This technology is particularly suitable for high-tech equipment and environmentally sensitive areas that require adaptive antifouling ability, such as marine exploration and marine sports equipment.

The present invention relates to the preparation and use of high-entropy nanozymes with multi-pathway synergistic antibacterial effects, belonging to the field of nanozyme catalytic materials. The present invention, for the first time, utilizes a hydrothermal method and high-temperature calcination method to synthesize oxygen-vacancy-rich high-entropy oxides with haloperoxidase-like, peroxidase-like, and glutathione oxidase-like activities. These oxides can catalyze bromide ions and hydrogen peroxide to generate hypobromous acid, which interferes with bacterial quorum sensing, and hydroxyl radicals, which disrupt structure and function. Furthermore, these oxides consume glutathione, which maintains the internal redox balance of bacteria. This allows for multi-pathway synergistic and efficient bacterial damage and inactivation, helping to address the problems of existing antifouling nanozyme materials, which suffer from a single catalytic pathway and poor component adjustability. This allows for the practical expansion of high-entropy nanozyme coatings, and has potential application prospects in the field of marine biofouling.

Techniques for reducing biofouling on optical equip- ment, using minimum power in a marine environment are provided. An example of an apparatus according to the disclosure includes a housing including a cavity and an ultraviolet transparent window disposed over the cavity, an optical device disposed in the cavity and directed towards the ultraviolet transparent window, one or more ultraviolet light emit- ting diodes disposed in the cavity and directed towards the ultraviolet transparent window, and a controller operably coupled to the one or more ultraviolet light emitting diodes and configured to provide at least one lamp power function to the one or more ultraviolet light emitting diodes, wherein the at least one lamp power function is based on at least a flash power value, a flash duration, a rest power value and a rest duration.

This invention discloses a method and system for monitoring underwater biological attachments on ship hulls using images, belonging to the field of underwater image monitoring technology for ship hulls. The method acquires a continuous binocular depth image sequence and a local velocity field image of the target observation area; calculates a pixel-level temporal depth variance map within a sliding time window, and outputs a dynamic occlusion mask image by combining it with the velocity field image; smooths the mask image and multiplies it with the normalized variance map to generate a spatial fusion weight matrix; extracts depth maxima on time frames to generate a local penetration depth map and calculates a mean depth map; weights the two images using the weight matrix and stitches them together to generate a candidate substrate depth map; calculates a spatial gradient matrix and combines it with the weight matrix to generate a diffusion steering matrix; then, it performs edge-preserving filtering on the candidate substrate depth map to generate a bottom rigid reference surface depth map, and finally generates an adaptive pressure control command. This invention achieves high-precision perspective and three-dimensional substrate reconstruction of a bottom rigid surface under dynamic flexible occlusion.

The invention provides methods for treating or preventing microbial (eg, bacterial) infections and means for performing these methods. In particular, treatment of infections requiring rapid and durable therapy is made possible, such as for treating acute conditions such as septicemia, sepsis, SIRS or septic shock. The invention is particularly useful, for example, for treatment of microbes such as for environmental, food and beverage use. The invention relates inter alia to methods of controlling microbiologically influenced corrosion (MIC) or biofouling of a substrate or fluid in an industrial or domestic system. The invention also useful for the treatment of pathogenic bacterial infections in subjects receiving a treatment for a disease or condition, such as a transplant or a treatment for cancer, a viral infection or an autoimmune disease.

This invention relates to a multifunctional composite membrane containing a natural antibacterial agent and a biomimetic hydrophilic carrier, and pertains to the field of separation membrane manufacturing technology for water treatment applications. The membrane is prepared by blending MCM-41 type honeycomb-structured mesoporous silica modified with tea tree oil (TTO) with a PVDF membrane, aiming to enhance the membrane's antibacterial and antifouling capabilities. TTO, with its excellent antibacterial properties, effectively alleviates biofouling problems, while MCM-41 possesses a high specific surface area and good chemical stability, offering multiple benefits including improved membrane hydrophilicity, reduced fouling, and enhanced essential oil dispersion. The combination of tea tree oil and MCM-41 simultaneously addresses both organic and biofouling issues in PVDF membranes, achieving a synergistic improvement in both material and membrane performance.

The invention discloses a micro-reactive barrier material for marine biological fouling prevention as well as a preparation method and application of the micro-reactive barrier material. The material is prepared from the following raw materials in parts by mass: 75-87 parts of a graded composite material, 6-9 parts of a resin material, 2-5 parts of a curing agent, 0.1-0.7 part of a defoaming agent and 5-12 parts of slow-release inhibition particles, wherein the slow-release inhibition particles are composed of 35.4%-45.8% of a granulation base material and 54.2%-64.6% of active coated particles, and the active coated particles comprise calcium nitrite, myristic acid, palmitic acid and octadecanoic acid. The material can be used as a coating or prepared into a protective casting through a micro-reactive barrier prefabricating technology, a micro-porous reactive barrier is formed through natural erosion or hydraulic compression in different sea condition fields, a slow-release inhibition material is arranged in holes, a multi-stage, long-term and effective treatment mode can be provided for marine biofouling, and the service life of the material is prolonged. The material can be prefabricated and brushed, and is corrosion-resistant and high in strength, so that the risk that the material is damaged by extreme sea conditions is greatly reduced.

This invention relates to the field of nanocomposite materials technology, specifically to a carbon-based silver sulfide composite aerogel with synergistically enhanced light-harvesting and biofouling resistance, its preparation method, and its applications. The method involves pouring a chitosan-graphene solution into a polystyrene mold and using different cryogenic casting methods to obtain chitosan-graphene aerogels with different orientations. Carbonization under a N2 atmosphere yields carbon-based aerogels with different structures. Immersion in a tannic acid-Tris solution allows for the adsorption of tannic acid molecules. After washing with deionized water, the aerogels are immersed in a silver nitrate solution to form tannic acid-silver ion complexes. Further washing with deionized water and immersion in a thioacetamide solution yields carbon-based silver sulfide composite aerogels with different structures. This method solves the problem of performance loss due to biofouling in carbon-based three-dimensional porous materials. The carbon-based silver sulfide aerogel exhibits superior light absorption and photothermal properties compared to carbon-based zinc oxide aerogels, overcoming the problem of weakened evaporation performance in conventional anti-biofouling designs.

The invention belongs to the technical field of material surface performance detection, and particularly relates to a method for detecting biological pollution resistance and durability of a silicone rubber surface, and the method comprises the following steps: S1, sequentially carrying out biological membrane inhibition rate quantitative detection, antibacterial adhesion detection, protein adsorption resistance test and surface wettability test on a silicone rubber sample to be detected; s2, carrying out durability treatment on the parallel sample; s3, repeating partial or all tests in the step S1 on the sample treated in the step S2; s4, comparing the performance data obtained in the step S1 and the performance data obtained in the step S3, and evaluating the biological pollution resistance and durability of the silicone rubber sample. According to the invention, biological membrane inhibition rate quantitative detection, anti-bacterial adhesion detection, anti-protein adsorption performance test, surface wettability analysis and durability test are organically combined to form a complete evaluation closed loop from molecular adsorption to microbial community and from immediate efficiency to long-acting stability, and all key links of biological pollution are comprehensively covered.

The present invention discloses a self-supporting polyethersulfone ultrafiltration membrane that resists biofouling, as well as its preparation method and application. The ultrafiltration membrane is produced by immobilizing cellulose nanocrystals and antibacterial ions on the surface and within the pores of the polyethersulfone membrane using polyphenol monomers. The self-supporting polyethersulfone ultrafiltration membrane can stably support hydrophilic and antibacterial materials, thereby imparting excellent hydrophilic properties and biofouling resistance, and can be efficiently and stably applied in water treatment or biological material processing.

The invention discloses a gel material with corrosion inhibitor and bactericide slow release functions and a preparation method thereof. The gel material is prepared from polyvinyl alcohol, a corrosion inhibitor and a bactericide through a circulating freezing-melting physical cross-linking method, and long-term, stable and controllable release of the corrosion inhibitor and the bactericide on the metal surface can be achieved, so that electrochemical corrosion and biological fouling are synergistically inhibited. The material is suitable for a complex environment with ocean alternation of wetting and drying, high salinity and high biological activity, and has the characteristics of high utilization rate of active ingredients, low maintenance frequency, environmental friendliness and the like.

Devices, methods, and / or systems are disclosed for protecting water flow systems from biofouling and / or other associated contamination. One or more devices are introduced into water flow systems, such as downstream of water supplies (e.g., lakes, oceans, rivers, reservoirs or other water supplies, including storage water supplies) and upstream of various surfaces / systems in water flow systems requiring biofouling protection. The device includes a defined volume for water and at least one structure positioned in the defined volume in use configuration to interact with the water in the defined volume to form "conditioned water" downstream into the water flow system. Such devices prevent, limit and / or reduce biofouling in water flow systems.

The invention discloses a water delivery tunnel maintenance ventilation numerical simulation method considering high ground temperature and biofouling, which comprises the following steps: carrying out a biologic putrefying gas release characteristic experiment in a high ground temperature environment, fitting a biologic putrefying gas release rate equation in the high ground temperature environment, calculating the required air quantity considering biologic putrefying gas pollution in the high ground temperature environment, and calculating the ventilation quantity of the water delivery tunnel maintenance ventilation numerical simulation method considering biologic putrefying gas pollution in the high ground temperature environment. And ventilation numerical simulation of the deeply-buried water conveyance tunnel in the overhaul period. According to the method, the emission amount and the emission rule of biological decay gas pollutants including organic gas TVOC in the deeply-buried water delivery tunnel in the high-ground-temperature environment are clearly considered; determining the air volume required for purifying biological decay gas pollutants including organic gas TVOC in the deeply-buried water delivery tunnel in the high-ground-temperature environment; biological decay gas release and ventilation numerical simulation of the deeply-buried water delivery tunnel in the overhaul period under the high ground temperature environment are comprehensively considered, the development condition of an air flow field in the tunnel and the migration and distribution rule of harmful gas under the high ground temperature and biological fouling coupling condition are determined, and the method has important significance for guaranteeing ventilation safety of the complex water delivery tunnel.

The invention provides a marine organism adhesion prevention material with a fluff structure on the surface as well as a preparation method and application of the marine organism adhesion prevention material, a strand formed by combining or twisting polyolefin monofilaments, high-strength PE (polyethylene) film-split fibers or ultra-high molecular weight polyethylene multifilament fibers is taken as a main body, and good strength and mechanical support are provided. The yarn with the fluff on the surface serves as the functional fiber yarn, and cohesive force and friction force between fibers in the yarn strand and between the yarn strand and the yarn can be increased after the functional fiber yarn is twisted with the main body yarn strand, so that the plied yarn or the multi-twisted yarn is not prone to fracture and loosen when bearing pulling force. Meanwhile, the fluff structure can be gathered on the surface of the plied yarn or the multi-twisted yarn, attachment of fouling organisms is remarkably inhibited by means of physical blocking and surface energy reduction, and the structure can remarkably inhibit attachment of large fouling organisms by increasing contact resistance, reducing attachment area and destroying ways of adhesion media secreted by organisms, so that the service life of the structure is prolonged, and the service life of the structure is prolonged. The non-toxic and environment-friendly antifouling effect is realized.

The present invention relates to a to a method for protecting a titanium alloy having a MMO on its surface by application of a voltage, in particular, from biofouling; to a shaped part comprising a titanium alloy having a MMO on its surface; and to a method for protecting such a shaped part from biofouling.

The invention discloses a membrane channel biological pollution multi-physical field simulation method based on physical information deep learning, which comprises the following steps: acquiring sampling data, and mapping the sampling data into a biological membrane morphology characterization field which is continuously distributed along with space coordinates; constructing a deep neural network model, taking the space coordinates of the membrane channel as input, taking multi-physical field state variables in the membrane channel as output, and establishing a mapping relation from the space coordinates to physical fields; a composite loss function driven by physical information is constructed, the composite loss function comprises a physical equation residual error used for constraining a physical field to meet a preset physical conservation law and a boundary condition residual error item used for constraining a boundary condition, and physical field distribution output by the model is made to conform to a physical evolution law in a membrane channel and biological membrane pollution characteristics at the same time; inputting space coordinates of a to-be-predicted area into the trained deep neural network model to obtain full-field physical quantity distribution information in the polluted membrane channel; the quantitative digital basis is provided for the anti-pollution bionic separation net.

The utility model discloses a self-cleaning ultrasonic anti-marine organism monitoring device which comprises a sealing cover and a floating ball, the sealing cover and the floating ball are connected into a whole through a bolt, a monitoring assembly is installed in the sealing cover, the monitoring assembly comprises an installation frame, the installation frame is fixedly connected to the inner wall of the top of the sealing cover, and the installation frame is fixedly connected to the inner wall of the top of the sealing cover. A controller and a storage battery are fixedly mounted on the inner wall of the bottom of the mounting frame, a water suction pipe is fixedly inserted into the sealing cover, one end of the bottom of the water suction pipe penetrates through the sealing cover and extends in the direction of the floating ball, and ultrasonic transducers are mounted outside a water inlet in the bottom of the water suction pipe and at the bottom of the circumferential outer wall of the floating ball; by arranging the ultrasonic transducers, the controller and the storage battery, the water suction pipe and the floating ball can be automatically cleaned, the situation that marine organisms block the water pipe and affect use of the device is effectively avoided, and the service life of the device is prolonged.

The invention discloses a copper-doped titanium-based energy-storage antibacterial material as well as a preparation method and application thereof, and belongs to the technical field of biological fouling prevention and control. The preparation method comprises the following steps that a titanium-based material is pretreated and then subjected to anodic oxidation twice, then the titanium-based material is placed in a copper ion solution to be subjected to electro-deposition, cleaning and drying and then subjected to annealing treatment, then a three-electrode system is adopted for charging treatment, and the copper-doped titanium-based energy-storage antibacterial material is obtained. The composite material has charge storage and chemical sterilization functions, is good in antibacterial durability, has a good antibacterial effect on corrosion and fouling leading electroactive bacteria such as pseudomonas aeruginosa in a marine environment, and can remarkably reduce the drug resistance risk of the bacteria at the same time; and the device can be recycled.

Disclosed herein are PEG-maximin H5 peptide conjugates and methods for using the same in the treatment or prevention of biofilms and biofouling.