Preparation And Characterization Of The Organic Silicone/Fluorine Antifouling Coatings With Low Surface Energy

Traditional toxic antifouling coating can prevent the pollution of the marine organisms, at the same time, it also causes serious pollution to the marine environment. As the voice of protection of the marine environment is increasing, the research and development of non-toxic antifouling paint is imperative. However, in china, the development of non-toxic antifouling coatings is low, and the good products is unavailable. In this paper, we prepared the organic silicon non-toxic antifouling coating with the low surface energy, and synthesized the copolymer containing fluorinated acrylic resin in order to improve the mechanism. And, the structure of the copolymer and the property of the coatings were characterized.In this paper, we firstly prepared the organic silicon antifouling coatings with different ratio of the dyes and various kinds of silicon oil. The proprieties of the organic silicon coatings were characterized by measuring the contact angle of the droplet water on the surface of the coating, modulus of elasticity, the simulated biological adhesion, applying static link plate, AFM, SEM and EDAX. We found a new method for measuring the simulated biological adhesion in lab. And the antifouling theory of the organic silicon coatings was analyzed, and a complete set of the organic silicon system for the middle connecting layer was studied. The results showed that: (1) the strength of the defaced marine biology is broadly proportional to the square of the produce of coating's surface energy and elastic modulus, which can be adjusted by changing the ratio of the dye to the radical polymer. The proper ratio of the dye to the radical polymer not only can give the antifouling films the well mechanism and elastic modulus, but also decrease of the surface energy of the entire system leading to advance of antifouling performance by forming the micro-structure with same the chemical compose.(2)PDMDPS silicone oil with high content of phenyl can diffuse to the surface of the coating, and weaken the adhesive strength of the defaced marine biology, thereby improving the performance of the antifouling coating; (3) the organic silicone antifouling coating with low surface energy can't prevent defacing process as to marine biology, but it can reduce the adhesive strength of marine biology, and the effusion of the silicone oil can help coating prevent the first stage of the process of the defacement of the marine biology. And when the marine environment is no longer suitable for the growth of the halobios, it will drop from the surface of the organic silicone antifouling coating with low surface energy. After scouring of the sea water, the surface of the coating can still maintain in good condition; (4) When the organic silicone resin with large molecular weight and high surface energy is used as basic resin and organic silicone joining mesosphere made from dual-amino-silane coupling agent is used as the middle layer, it has good bond strength with the anti-corrosion epoxy coating and makes for the coating of organic silicone antifouling paint with low surface energy.In order to improve mechanic properties of the organic silicon antifouling coatings with low surface energy, the various acrylate copolymers with the side-chain containing alkyl full of fluorine was synthesized by the method of radical polymerization, which can be used as the basic resin for make the organic fluorined antifouling coatings with low surface energy. The copolymer is characterized with the technology of GPC, IR and H-NMR, through measuring the contact angle of the droplets on the surface of the coating, scanning electron microscopy, XRD analysis of scattering spectroscopy, the impact of different kinds and the dosage of acrylate monomer with different alkyl full of fluorine to the surface properties of the coating was studied. It is found that: (1) when the amount of acrylate with fluorine is invariable, long alkyl side chains make for the massing of the fluorine atoms on the surface of the paint film, and it leads to lower surface energy; (2) so as to copolymer, when the amount of fluorinated monomers is less than 3%, as the amount of fluorinated monomers increases, fluorine atom assembles on the surface of material, causing that the surface power of the material significantly decreases; when the amount of the fluorinated monomers was in excess of 3%, as fluorine atoms on the material surface basically reaches saturation, even the amount of fluorined containing monomers continues to increase, there is no noticeable change to the surface energy of the material.In this paper, a lot of the basic research work has been made in the non-toxic antifouling coatings with low surface energy and a lot of progress was made. That can make theoretical preparations for the development of non-toxic antifouling coatings in china, and can be helpful for the foundation for the industrialization of the fluorine/ organic silicon low surface energy antifouling coatings which with the independent intellectual property rights.