12 results about "Sharkskin" patented technology

The invention discloses a self-cleaning bionic anti-drag film based on a sharkskin surface structure and a preparation process of the self-cleaning bionic anti-drag film, and relates to the technical field of bionic anti-drag film preparation. According to the invention, resorcinol bis (2-hydroxyethyl) ether, 3, 3 ', 4, 4'-benzophenone tetracarboxylic dianhydride and the like are used as raw materials to prepare polyol containing an ester bond and an ether bond, the polyol reacts with 4, 4-diisocyanate dicyclohexylmethane to obtain a thermoplastic polyurethane film with high temperature resistance, and the polyol is also used for preparing an antistatic polyurethane coating, so that the antistatic polyurethane coating has high temperature resistance. And quaternary ammonium salt and sulfhydrylated titanium dioxide are introduced, so that the anti-drag layer formed after embossing and curing has antistatic and self-cleaning properties at the same time.

This invention relates to the field of marine engineering materials technology, specifically to a marine underwater composite antifouling and drag-reducing film and its manufacturing and application methods. The composite antifouling and drag-reducing film includes an underwater composite adhesive layer, a base support layer, an antifouling functional layer, and a biomimetic shark skin surface layer. The underwater composite adhesive layer includes a modified low-temperature hot melt adhesive layer and an underwater epoxy transition layer. The layers work together to achieve a comprehensive effect of rapid underwater adhesion, firm bonding, long-lasting antifouling, and biomimetic drag reduction. It has the advantages of simple structure, underwater adhesion, antifouling and drag reduction functions, and applicability to the surface protection of ship hulls, underwater vehicles, marine engineering equipment, and marine facilities.

The invention belongs to the technical field of metallurgical continuous casting, and particularly relates to a crystallizer copper plate and a use process thereof, which are characterized in that a sharkskin-imitating micro-unit array is arranged on the surface of the crystallizer copper plate, the outline length L of the sharkskin-imitating micro-unit array is 0.1-0.4 mm, the outline width H of the sharkskin-imitating micro-unit array is 0.1-0.4 mm, and the width H of the sharkskin-imitating micro-unit array is 0.1-0.4 mm. Each sharkskin-imitating micro unit is a circular or nearly circular laser etching body with a convex surface, a main ridge is arranged in the middle of the surface, two symmetrical branch ridges are arranged on two sides of the main ridge, the height V of the main ridge is 50-200 microns, and the distance between the adjacent micro units is 200-500 microns; the main ridge is arranged in the width direction of the casting blank, the included angle alpha between the branch ridges and the main ridge is 15-45 degrees, and a large angle is taken corresponding to a high-shrinkage steel grade. Compared with the prior art, the method has the beneficial effects that the sharkskin-imitating micro-unit array is prepared on the working face of the copper plate through the laser etching technology, the friction resistance between an initial setting shell and the copper plate is reduced through the fluid boundary layer effect, and the surface quality of a casting blank and the continuous casting efficiency are improved.

The invention relates to the technical field of leather materials, and particularly discloses wear-resistant leather with an enhanced protein bionic structure and a preparation method of the wear-resistant leather. The wear-resistant leather sequentially comprises a multi-stage bionic wear-resistant surface layer, a protein bionic core layer and base cloth from top to bottom, pangolin scale macroscopic ribs and sharkskin microcosmic grooves are re-carved on the multi-stage bionic wear-resistant surface layer, and a nano hard-phase filler is compounded; the protein bionic core layer adopts a spider silk multistage fiber structure and a shell hard phase embedding mechanism, and a dynamic cross-linked network is introduced; and the transition layer and the dynamic cross-linking bonding layer realize interlayer stable combination and micro-damage self-repairing. The preparation method comprises the steps of raw material pretreatment, raw material preparation of each layer, step-by-step forming, composite curing and the like. Through multistage collaborative bionic and dynamic crosslinking design, the problems that traditional protein-based leather is poor in wear resistance and insufficient in long-term effect are solved, meanwhile, the skin-friendly and environment-friendly advantages are reserved, the wear resistance, the tearing strength and the interlayer binding force are remarkably improved, and the protein-based leather is suitable for high-end shoes, automobile interiors and other scenes.

The invention relates to the technical field of marine environmental protection, and discloses a biological adhesion prevention marine intelligent intercepting and filtering system which comprises a net body woven by ultra-high molecular weight polyethylene fibers, a super-hydrophobic antifouling coating, a state monitoring module, a data processing and control module and an active cleaning module. Dynamic antifouling is achieved through a sharkskin-imitating microstructure and a pH response type microcapsule, a maintenance instruction is generated in combination with real-time monitoring and intelligent analysis, and attachments are removed through a piezoelectric ceramic actuator. The method can significantly reduce the risk of biological attachment, improve the operation efficiency and stability of the system, reduce the manual intervention and maintenance cost, is environment-friendly, and can be popularized to the fields of ship shells, ocean platforms and the like.

This utility model belongs to the field of centrifugal compressor manufacturing technology, and particularly relates to an anti-erosion and wear structure for compressor blades. Its key feature is that it includes ceramic fiber cloth, which is integrally bonded to the blade body surface using a silicone rubber adhesive. The ceramic fiber cloth is woven with a herringbone pattern or has a herringbone pattern hot-pressed onto the surface of the ceramic fiber felt using a mold, forming a symmetrical V-shaped groove surface similar to shark skin. Compared with existing technologies, the beneficial effects of this utility model are: by bonding a layer of ceramic fiber cloth with a shark skin-like texture to the surface of the aluminum alloy blade, the unique friction-reducing effect of the shark skin texture is utilized to reduce the erosion effect of the fluid on the impeller surface; the ceramic fiber cloth material itself has wear resistance, high temperature resistance, and corrosion resistance, which can improve the defects of the aluminum alloy material itself, extend the service life of the impeller, and ensure the long-term safe and stable operation of the centrifugal compressor.

This invention belongs to the field of flexible radar-absorbing metamaterials, specifically relating to a shark-skin-inspired radar-absorbing metamaterial and its fabrication method. The material structure comprises an upper resistive film pattern layer, a middle dielectric layer, and a bottom metal layer. The resistive film pattern layer is deposited on the dielectric layer using magnetron sputtering technology. The dielectric layer is tightly bonded to the metal layer using OCA optically transparent adhesive. The pattern of the resistive film pattern layer is a shark-skin-inspired structure, specifically comprising several shark-skin-inspired structural units. Each structural unit combines four cuboid shark-skin-inspired scutes covered by the resistive film with several groove structures without resistive film coverage. This invention, through optimized structural parameter design, achieves broadband radar absorption and stealth capabilities, overcoming the problems of narrow bandwidth and high density inherent in traditional radar-absorbing materials. It also possesses advantages such as small thickness, low cost, easy control, simple manufacturing process, and high temperature resistance, representing a significant breakthrough in terms of thinness, lightness, wide bandwidth, and strength.

The present application relates to the technical field of marine engineering materials, and discloses a sharkskin structure super-hydrophobic marine protective coating based on laser etching and a method thereof.The coating takes foamed copper as a substrate, constructs a sharkskin biomimetic microcavity array through laser etching, and sequentially loads a silane-modified epoxy amine layer, a silane-quaternary ammonium chitosan composite modified candle soot nanoparticle layer.The present application further introduces a self-repairing microcapsule composite modification system, a substrate interface plasma grafting-oxidation transition layer synergistic strengthening technology and a broad-spectrum anti-biofouling composite system, discards fluorine-containing compounds, utilizes waste, has super-hydrophobic, corrosion-resistant, impact-resistant, oil-water separation and anti-biofouling multifunction, and is outstanding in mechanical stability and environmental protection, and is suitable for marine equipment protection such as ships, offshore wind power and the like.

The invention relates to the technical field of ocean engineering materials, and discloses a sharkskin structure super-hydrophobic ocean protective coating based on laser etching and a method thereof. According to the coating, foamy copper serves as a substrate, a sharkskin bionic microcavity array is constructed through laser etching, and a silane modified epoxy amine layer and a silane-quaternized chitosan composite modified candle ash nano-particle layer are sequentially loaded. According to the invention, a self-repairing microcapsule composite modification system, a substrate interface plasma grafting-oxidation transition layer synergistic enhancement technology and a broad-spectrum anti-biofouling composite system are further introduced, fluorine-containing compounds are abandoned, wastes are utilized, and multiple functions of super-hydrophobicity, corrosion resistance, impact resistance, oil-water separation and biofouling resistance are achieved; mechanical stability and environmental protection performance are outstanding, and the device is suitable for protection of marine equipment such as ships and offshore wind power.

The invention discloses an air mass control method based on a sharkskin inclined structure, which comprises the following steps: constructing a main body structure of a guide vane blade, the main body structure comprises a blade front edge a, a blade rear edge b, a blade rim part c, a blade hub part d, a suction surface e and a pressure surface f, the suction surface e and the pressure surface f are arranged on two sides of a blade main body, and a sharkskin area with a plurality of groups of sharkskin inclined bionic structures is arranged on the suction surface e; a single sharkskin inclined bionic structure is constructed and designed, and the single sharkskin inclined bionic structure comprises a base attached to the surface of a blade and a top of an inclined sharkskin structure; and establishing an arrangement rule of a plurality of sharkskin inclined bionic structures, and performing integral construction of the sharkskin inclined bionic structures. The invention further discloses the sharkskin inclined bionic structure manufactured by the air mass control method based on the sharkskin inclined bionic structure, a gas-liquid multiphase pump guide vane blade and a guide vane. The flow characteristics of the surfaces of the blades can be improved, large-scale air masses can be crushed, the flow resistance can be reduced, and the operation performance and stability of the gas-liquid multiphase pump can be improved.