Preparation method of electromagnetic-driven hydrogel antifouling coating layer material

Abstract

Provided is a preparation method of an electromagnetic-driven polyvinyl alcohol magnetic hydrogel antifouling coating layer including three components: a component A, a component B and a component C.The component A is obtained by taking polyvinyl alcohol resin as a base material and deionized water as a dispersion medium, adding magnetic powder, a thixotropic agent and a defoamer, dispersing thematerials through a sanding process and mixing evenly, wherein the fineness is less than 80 [mu]m. The component B is prepared by dispersing dialdehyde in deionized water to obtain an aldehyde solution with a certain concentration. The component C is prepared by dispersing proton acid in deionized water to prepare an acid solution with a certain concentration. An externally applied alternating magnetic field can make a micro-morphology dynamic change generated on the surface of the magnetic hydrogel. By simulating the dynamic epidermal characteristics of marine organisms, the adhesion of fouling organisms can be inhibited and an anti-fouling role is played. Experiments of biological inhibition of absorption and desorption of indoor navicula tenera show that the magnetic hydrogel coating layer has good absorption inhibition and desorption performance on the fouling organisms under the alternating magnetic field.

Description

technical field [0001] The invention belongs to the technical field of coating material preparation, and in particular relates to a preparation method of an electromagnetically driven hydrogel antifouling coating material. Background technique [0002] In the process of human development and utilization of the ocean, marine biofouling will bring great harm to ships, such as increasing ship navigation resistance, increasing hull weight, increasing fuel consumption, accelerating hull corrosion, and increasing times of docking maintenance. The most economical, effective and common method to solve fouling organisms is to apply antifouling paint on the surface of marine facilities. At present, the most widely used antifouling coatings on the market are mainly tin-free self-polishing antifouling coatings, and their resin base materials are mainly divided into three categories: zinc acrylate resin, copper acrylate resin, and silanized acrylic resin. The main antifouling agent is c...

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Problems solved by technology

[0004] At present, the preparation of hydrogel or magnetic hydrogel in other fields mainly adopts the method of repeated freezing and thawing. For example, the prior art discloses three kinds of hydrogels: the first is to pour a certain concentration of polyvinyl alcohol aqueous solution into the mold , freeze and form at ~10°C to ~40°C, then thaw at room temperature, and then put it back into the freezer. Repeat this cycle for 3 to 5 times, and you can get a transparent hydrogel with good elasticity, general mechanical strength, but this method The application in the paint industry is relatively limited; the second is to mix the activated agate particles with chitosan and acrylic acid, and add a crosslinking agent and an initiator to react under ultraviolet light to obtain a gel solution. Blend with ferroferric oxide magnetic particles, freeze and form at ~10°C to ~40°C after mixing, and cycle 3 to 5 times by thawing at room temperature and freezing in a freezer, which is not easy to cause agglomeration and precipitation, and the obtained magnetic water The mechanical properties of the gel are good, but the industrial application is relatively limited; the third is to use methacrylic acid and mercaptoacrylic acid under the action of the photoinitiator benzophenone to initiate polymerization with ultraviolet radiation to form a polymerized hydrogel, and then FeCl 2 and FeCl 3 Add ammonia water to the raw material to react to generate ferric hydroxide, then calcine and magnetize to obtain magnetized ferric iron tetroxide, then mix and stir the hydrogel with magnetized ferric ferric oxide and Bacillus subtilis to obtain magnetic hydrogel. Methods The process of preparing magnetic hydrogel is complicated, the sample repetition rate is not enough, and the magnetic properties are poor

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