涂层中玻璃鳞片平行度控制与抗渗性能研究  

Association study of self-assembly parallel degree and permeability of glass flake coatings

作　　者：徐中[1] 王兴镇 朱孟磊 肖俊[1] 

机构地区：[1]大连理工大学机械工程学院,辽宁大连116024

出　　处：《哈尔滨工程大学学报》2015年第9期1276-1280,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51075052)

摘　　要：针对涂层在使用的过程中存在渗透腐蚀的现象,研究了聚合物-玻璃鳞片自组装体系,对聚合物复合材料建立了数学模型,分析了模型中对鳞片组装平行度的主要影响因素,运用分子动力学探讨了各主要影响因素对鳞片的作用机理,通过对玻璃鳞片的表面修饰及鳞片在涂层中平行度的组装控制来降低涂层的渗透率,提高涂层抵御腐蚀介质渗透的效果。通过对该体系涂层的扫描电镜(SEM)观察、电化学交流阻抗(EIS)等技术手段的测试对比,说明涂层抗渗性能与鳞片平行度排列程度具有近似线性关系。实验证明:平行度较高的涂层经600 h浸泡后总阻抗值变化不大,仍然保持在107Ω·cm2,其渗透率只有1.41%。Considering penetration and corrosion resistance of coatings,a polymer-glass flake self-assembly system was studied. A mathematical model of a polymer composite was created to analyze the main factors influencing the degree of parallelism of the model assembly. The mechanism of the main factors acting on the glass flake was explored using molecular dynamics. By modifying the surface glass flakes and controlling the degree of parallelism of glass flakes in the assembly,the penetration into the coating was reduced,thereby improving corrosion resistance.Using scanning electron microscopy（ SEM）,and electrochemical impedance（ EIS） experiments,it was found that the impermeability of the coating and the degree of parallelism has a similar,correlating,linear relationship. The experiments prove that for the coating with a higher degree of parallelism,the change of total impedance value of coatings is not large. After 600 h of immersion,steady at 107Ω·cm2,permeability was only 1.41%.

关 键 词：玻璃鳞片 平行度 电化学交流阻抗 自组装 吸水率 

分 类 号：TB332[一般工业技术—材料科学与工程]