Preparation And Properties Of Multi-Strategy Synergistic Antifouling Coatings Resins

Marine biofouling is the unfavorable accumulation of marine organisms on marine equipment,which will further lead to substantial environmental crises and economic consequences.Recently,coating marine antifouling coatings has become an economical and effective way to solve biofouling.There are many types of antifouling coatings in the market and each of them has its own antifouling strategy and antifouling characteristics,and only rely on a single strategy have limitations.The existing technology is to directly blend different coatings,which can lead to poor coating compatibility,easy failure in local areas,and uncontrollable release of antifouling agents.Therefore,how to achieve effective combination of resin functions at the molecular level has become the key to solve the above problems.This paper introduces both fluorine long chain and cinnamic acid structures into acrylate zinc self-polishing polymers.The aim is to synthesize novel polymers with self-polishing,antimicrobial and amphiphilic.Then,the content of hydrolyzed monomers and hydrophobic monomers is regulated to achieve the synergistic antifouling effect combining the three functions:controlled release of antifouling agents,toxicity effect of antifouling agents and low bio-adhesive properties of amphiphilic surfaces.The main research contents are as follows:(1)Regarding the molecular structure design and synthesis of the resin,the acrylate zinc fluorinated polymer(AZFP)was prepared by dehydration condensation reaction between acrylate fluorinated polymer(AFP)and basic zinc 4-hydroxycinnamate(BZH).AZFP was composed of hydrolyzed Zn(II),antimicrobial p-CA and hydrophobic C-F.The polymers and reaction processes were studied by FT-IR,~1H NMR and XPS.(2)Regarding the synergistic antifouling mechanism and performance of the resin,the static antifouling performance of AZFP was improved by adjusting the ratio of hydrolyzed monomer acrylic acid(AA)and hydrophobic monomer 2,2,2-trifluoroethyl methacrylate(TFEMA).The effects of functional monomers on the thermal stability,hydrolytic properties,surface properties and antifouling properties of the resin were also investigated.The results showed that AZFP had a controlled hydrolysis rate(65.4～268.9 mg/m2·d).The hydrolysis behavior of AZFP could control the release of p-CA(0～1.55μg/m L)and induce the formation of amphiphilic micro/nanostructures(R_a≈0.266μm).The releasing p-CA side groups inhibited the growth of S.aureus,E.coli and Chlorella.The formed amphiphilic micro/nanostructures exhibited excellent anti-adhesive properties against proteins(BSA,0.2-1.9%),bacteria(E.coli,<0.5%)and algae(Chlorella,<600 cells/mm~2).The marine field test demonstrated that AZFP-2-2 and AZFP-3-1 had an excellent static anti-biofouling performance for over 240 days.