CN-121975411-A - Preparation method of barnacle-preventing coating for hull shell

Abstract

The invention discloses a preparation method of a barnacle-preventing coating for a hull shell. The method comprises the steps of preparing an epoxy resin bottom layer through in-situ crosslinking on the surface of a ship metal substrate, dissolving carboxypeptidase Y and tris (2-carboxyethyl) phosphine hydrochloride in an organic solvent, adding polycaprolactone, mixing, coating on the surface of the epoxy resin bottom layer, drying to obtain an intermediate layer, uniformly mixing polydimethylsiloxane, nano silicon dioxide and an anti-corrosion component, coating on the surface of the intermediate layer, and curing to obtain the protective surface layer. According to the invention, through the design of a three-layer structure, the adhesion and the basic corrosion resistance of the bottom layer are ensured, the high-efficiency environment-friendly rattan-proof kettle is realized by the middle layer, the wear resistance and the aging resistance of the surface layer are improved, and the synergistic effect of the layers is realized, so that the problems that the existing coating is 'antifouling and environment-friendly' and 'the adhesion and the wear resistance are not balanced' are solved. The coating has simple preparation process and controllable cost, can be widely applied to marine engineering equipment such as ship shells, ocean platforms and the like, and has remarkable economic and environmental benefits.

Inventors

• ZHU MEIXIN
• GUO BIYU
• CHEN MINGHUI
• JIANG KEKE
• ZHANG HENGYU

Assignees

• 南通理工学院

Dates

Publication Date

20260505

Application Date

20260319

Claims (10)

1. 1. The preparation method of the barnacle-preventing coating for the hull shell is characterized by comprising the following steps of: (1) Preparing an epoxy resin bottom layer by in-situ crosslinking on the surface of the ship metal substrate; (2) Dissolving carboxypeptidase Y and tris (2-carboxyethyl) phosphine hydrochloride in an organic solvent, adding polycaprolactone, mixing to obtain a second mixed solution, coating the second mixed solution on the surface of an epoxy resin bottom layer, and drying to obtain a middle layer; (3) And uniformly mixing the polydimethylsiloxane, the nano silicon dioxide and the preservative component to obtain a third mixed solution, coating the third mixed solution on the surface of the intermediate layer, and curing to obtain the protective surface layer.
2. 2. The method for preparing an anti-barnacle coating for a hull casing according to claim 1, wherein in the step (1), the method for preparing the epoxy resin bottom layer by in-situ crosslinking comprises the following steps: And mixing the epoxy resin with the silane coupling agent to obtain a first mixed solution, coating the first mixed solution on the surface of the ship metal substrate, and curing to obtain the epoxy resin bottom layer.
3. 3. The method for preparing an anti-barnacle coating for a hull casing according to claim 2, wherein the mass ratio of the epoxy resin to the silane coupling agent is 100:1-5, the coating thickness of the first mixed solution is 50-100 μm, and the curing condition is that the mixture is left to stand at room temperature for curing for 12-36 hours or cured at 60-80 ℃ for 2-4 hours.
4. 4. A method of producing an anti-barnacle coating for a hull casing according to claim 1, wherein in step (2), the mass ratio of carboxypeptidase Y to tris (2-carboxyethyl) phosphine hydrochloride to polycaprolactone is 1-3:1:4-20.
5. 5. The method for producing an anti-barnacle coating for a hull casing according to claim 1, wherein in the step (2), the organic solvent comprises at least one of dichloromethane, chloroform, tetrahydrofuran, dioxane, dimethyl sulfoxide.
6. 6. A method of producing an anti-barnacle coating for a hull casing according to claim 1, wherein in step (2), the second mixed solution is applied in a thickness of 100-200 μm and the curing condition is allowed to stand at room temperature for at least 12 hours.
7. 7. A method of producing an anti-barnacle coating for a hull casing according to claim 1, wherein in step (2), the carboxypeptidase Y has an enzyme activity of at least 1200U/mg at 30 ℃ and ph 6.0-8.0.
8. 8. A method of preparing an anti-barnacle coating for a hull casing according to claim 1, wherein in step (3), the anti-corrosive component comprises at least one of zinc phosphate, micaceous iron oxide, and cuprous oxide.
9. 9. The method for producing a barnacle-preventing coating for hull shells according to claim 1, wherein in the step (3), the mass ratio of polydimethylsiloxane, nano silica and antiseptic component is 100:5-10:3-5.
10. 10. A method of producing an anti-barnacle coating for a hull casing according to claim 1, wherein in step (3), the curing condition of the third mixed solution is at least 24 hours at room temperature or 1-2 hours at 80-100 ℃.

Description

Preparation method of barnacle-preventing coating for hull shell Technical Field The invention relates to preparation of a marine antifouling coating, in particular to a preparation method of a ship hull shell barnacle-proof coating. Background In the sailing and berthing process of ships, the hull shell is soaked in a seawater environment for a long time, and is easy to be attached by marine attachment organisms such as barnacles and the like. On the one hand, the surface roughness of the ship body can be obviously increased, so that the water resistance of the ship during sailing is greatly increased, the fuel consumption is further increased by 10% -30%, the sailing efficiency and economy of the ship are seriously reduced, on the other hand, the adhesion of the barnacles can damage the original protective structure of the hull shell, accelerate the electrochemical corrosion of metal base materials, shorten the service life of the ship body, increase the maintenance cost and overhaul frequency of the ship, and meanwhile, the ship can be blocked by underwater pipelines of the ship, the normal operation of a propulsion system is influenced, and potential threat is formed to the sailing safety of the ship. At present, protection means for barnacle attachment in the ship industry mainly comprise two types, namely physical protection and chemical protection. The traditional chemical protective coating is mostly dependent on heavy metal compounds (such as organic tin antifouling agents) containing copper, mercury, tin and the like, and can inhibit barnacles from adhering by slowly releasing heavy metal ions, but the heavy metals can continuously accumulate in marine environments, cause toxic injury to marine organisms such as plankton, fish and the like, destroy marine ecological balance and are limited or forbidden by international regulations such as International convention for preventing marine pollution. Chinese patent CN202510596709.0 discloses a phenyl ether bimetal organic frame antifouling material, a preparation method and application, and the patent only verifies the antifouling and anti-corrosion effects of the antifouling material on Q235 carbon steel substrates, does not mention suitability for commonly used substrates such as aluminum alloy, glass fiber reinforced plastic, stainless steel and the like of ships, and does not describe key indexes such as adhesion force, compatibility and the like of the coating and different substrates. In the actual marine environment, the antifouling material needs to withstand the complex conditions of high salt fog, dry and wet alternation, ultraviolet irradiation and the like, and the outdoor test of the patent only carries out a short-term test for 15 days in the eastern sea tidal range, lacks long-term weather resistance and aging resistance data, and cannot prove the long-term antifouling stability. Chinese patent CN202510349996.5 discloses a protective coating for deep sea pressure-resistant housing and its preparation method, the patent mentions that deep sea current scouring, erosion abrasion of suspended particles (silt, shell debris) are important reasons for failure of the coating, but the patent only verifies static wear resistance, and the abrasion rate and the protective life of the coating are not tested by dynamic erosion (simulating scouring conditions of different flow rates and particle sizes), and cannot cope with the deep sea environment of strong current. The patent only verifies the aluminum alloy, titanium alloy and carbon fiber base materials, does not cover materials such as nickel-based alloy, glass fiber reinforced plastic and high-strength steel which are commonly used in deep sea equipment, does not illustrate the adhesion difference between the coating and different base materials and the targeted optimization scheme, and limits the application scene. Along with the increasing strictness of environmental regulations and the improvement of marine ecological protection consciousness, industry urgent need develop a novel anti-barnacle chemical protective coating, the coating needs to have long-acting stable anti-barnacle adhesion performance under the premise of meeting no heavy metal pollution and meeting environmental protection standards, and meanwhile needs to have good adhesion with hull shell base materials (such as steel, aluminum alloy and the like), can resist complex marine environments such as seawater scouring, dry and wet alternation, salt mist erosion and the like, is convenient to construct and cost-controllable, so as to solve the dual pain points of poor environmental protection and insufficient protection effect of the prior protection technology, and meet the actual demands of the ship industry on efficient, environment-friendly and long-acting anti-barnacle protection. Disclosure of Invention The invention aims to provide a preparation method of a hull casing anti-barnacle coating, which solves the problem of how t