Preparation and evaluation of natural rosin-based zinc resins for marine antifouling

编号 020030602

推送时间 20210830

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Preparation and evaluation of natural rosin-based zinc resins for marine antifouling

来源期刊 Progress in Organic Coatings

期 第306期

发表时间 20210414

关键词 Rosin-based zinc resins;  Hydrophobicity;  Hydrolysis;  Antibacterial and anti-algal activity;  Antifouling; 

摘要 Currently, it is highly desirable to develop a novel antifouling resin with a controllable hydrolysis rate and stable and effective antifouling performance for marine antifouling coatings. In our study, we prepared natural rosinbased zinc (RZn-x) resins by a relatively facile and green synthetic method from Zn(OH)(2) and antimicrobial natural rosin, which is considered a toxicity-free raw material, thus ensuring the green and antimicrobial character of the material. In their optimal combination, the RZn-x coating surface exhibited ideal peeling behaviour upon immersion in seawater, which caused the WCA of the material surface to change from 55 degrees before immersion to 135 degrees after immersion for 60 days and enhanced the antifouling properties. Dynamic simulation experiments of these resins also demonstrated that the hydrolysis rate of this material immersed in dynamic seawater was related to the zinc content, and we could control the self-polishing ability of the resins by adjusting the content of Zn(OH)(2) participating in the reaction. Moreover, hydrolysis led to a hydrophobic surface, which could prevent fouling organisms from adhering. Laboratory bioassays against BSA adsorption (immersed for 4 h: 1.986 mu g/cm(2)), bacterial (over 95 % reduction) and marine algal adhesion (more than 60 % reduction) revealed outstanding anti-protein, bacteriostasis and anti-algal growth and adhesion properties compared to pure rosin and the control sample. The long-term antifouling capability in marine field tests indicated that the RZn-x resins maintained their antifouling activity for more than 6 months, especially RZn-50, which showed excellent antifouling performance.

服务人员 尚玮姣

服务院士 宋湛谦

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