| In order to solve heavy metals of the conventional antifouling coatings has resulted in serious the marine environment pollution, We have developed a self-polishing marine antifouling coatings in which doped betaine nanoparticles. Such coatings,it can re-freshed with base constantly hydrolyzes in flowing waters. by means of nanoparticles of amphiphilic block polymer core-shell structure switching from hydrophobicity tohydrophilicity, betaine Wrapped in inner structures can be exposed. In order to compass marine antifouling subject, betaine being exposed forms the anti-adsorption surface in the coating layer to weaken and prevent adsorption of marine fouling organisms.Our group had adopted two-step method to syhthesis two kinds of block copolymers which were prepared from N-butyl metharylate and butyl acrylate(BA) respectively polyerized with 2-(Dimethylamino) ethymethacrylate(DMAEMA), and by atom transfer radical polymerization(ATRP). However, polymerization by two-step method has to add excessive DMAEMA and conversion rate of DMAEMA ws at low level. Two amphiphilic block coplymers were single-step prepared by sequential anionic polymerization in this paper. The conversion rates of All monomers were more than 95 percent to reach almost atom economy levels that made industrial-scale production feasibility. In addition, doping zwitterionic nanoparticle into base carried out measurement of the rate of hydrolysis ang antibacterial test to preliminary explore antifouling property of the co ating.It found that the hydrolysis rate of the anti-fouling coating involves the content 、 the molecular weight and the molar ratio of diblock copolymer for nanoparticle. Antibacterial test disclose that self-refreshed anti-fouling coating could inhibit the adsorpyion of the staphylococcus aureus. The sea field test illustrated That Adition of the zwitterionic nanoparticle enhances the marine anti-fouling property of the self-refreshed coating effectively. |
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