基于拉曼光谱的含铜自抛光防污涂料的性能研究

Research on Performance of Self-polishing Antifouling Coatings Containing Cu Based on Raman Spectroscopy

海洋生物污损现象常常发生于涉海材料及海事设备的表面,造成了严重的经济损失及安全隐患。防污涂料可通过缓慢的毒剂释放来达到缓解海洋污损生物的目的,是极为经济高效的措施之一。其中防污剂是防污涂料功能实现的主体组分。然而,有关含铜自抛光防污涂料(Cu_(2)O-SPC)中防污剂氧化亚铜(Cu_(2)O)的检测及在服役过程中的成分变化研究较少。鉴于此,本工作探究了Cu_(2)O-SPC表面特征及防污剂Cu_(2)O在服役过程中的成分变化。扫描电子显微镜(SEM)、能谱仪(EDS)结果表明,Cu_(2)O-SPC表面存在明显的颗粒相和非颗粒相,其中颗粒相存在大量的Cu、C、O元素,非颗粒相存在Cu、C、O、Fe、S、Si等元素。拉曼(Raman)光谱结果表明,选定Cu_(2)O-SPC中Cu_(2)O的追踪拉曼特征峰为409 cm^(-1),抛光磨蚀前后Cu_(2)O-SPC的特征峰值发生了变化;对Cu_(2)O-SPC部分区域进行原位分析发现Cu_(2)O特征峰强度及峰面积降低并且波动减小。这表明抛光磨蚀前后Cu_(2)O-SPC中Cu_(2)O浓度发生了变化,且对Cu_(2)O进行追踪发现,防污涂料服役过程中Cu_(2)O向外界进行了缓慢扩散,并且于防污涂料内部在浓度差的驱动下由高浓度向低浓度进行了扩散。本工作有助于明确海洋装备用防污涂料表面形貌及成分、防污剂浓度转变,为防污涂料关键化学组分追踪和量化分析提供了新的思路。

Fouling of marine organisms often occurs on the surface of marine materials and equipment,causing serious economic losses and security risks.Antifouling coatings are one of the most economical and efficient measures to relieve marine fouling organisms through slow release of toxic agents.Antifouling agent is the main component of antifouling coating.However,there are few studies on the detection of cuprous oxide(Cu_(2)O)and its composition change in the process of service in Cu_(2)O-SPC.In view of this,the surface characteristics of Cu_(2)O-SPC and the composition changes of antifouling agent Cu_(2)O in service were studied in this work.The results of scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS)show that there are obvious granular phase and non-granular phase on the surface of Cu_(2)O-SPC,in which there are a large number of Cu,C,O elements in the granular phase and Cu,C,O,Fe,S,Si elements in the non-granular phase.The Raman spectra shows that the tracking Raman characteristic peak of Cu_(2)O in Cu_(2)O-SPC is selected as 409 cm^(-1),and the characteristic peak of Cu_(2)O-SPC changes before and after corrosion.In situ analysis of some areas of Cu_(2)O-SPC show that the characteristic peak intensity and peak area of Cu_(2)O decrease and the fluctuation decrease.That is,the Cu_(2)O concentration of Cu_(2)O-SPC has changed before and after corrosion.During the service of antifouling coatings,Cu_(2)O slowly diffuses to the outside environment,and it diffuses from high concentration to low concentration driven by the concentration difference inside the antifouling coatings.This work is helpful to clarify the surface morphology and composition of antifouling coatings used in marine equipment and the transformation of antifouling agent concentration.It provides a new method to trace and quantify the key chemical components of antifouling coatings.