MnO_2微米容器的制备及缓蚀剂封装释放性能研究

Preparation of MnO-_2 micro-container and study on the encapsulation and releasing properties of corrosion inhibitor

通过模板法制备了二氧化锰微米容器,利用脱溶剂法实现了微米容器对苯并三氮唑(BTA)的封装。通过扫描电子显微镜和X射线衍射仪表征了微米容器的表面形貌及晶体结构,使用红外光谱确定了微米容器对BTA缓蚀剂的负载,利用紫外可见分光光度计、交流阻抗谱、动电位极化曲线等测试手段分析了携载BTA缓蚀剂的Mn O2微米容器在模拟海水中BTA的释放速率及缓蚀性能。结果表明,脱溶剂法可有效地实现Mn O2微米容器对BTA缓蚀剂的封装,封装量为3.9%,而且携载BTA缓蚀剂的Mn O2微米容器在3.5%Na Cl溶液中能有效地释放BTA,实现了对铜基体的腐蚀防护。

The MnO2 micro-containers were prepared by template method, and then used to encapsulate benzotriazole （BTA）, a corrosion inhibitor, through desolvation process. The surface morphology and crystal structure of the micro-containers were characterized by scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The loading of BTA in MnO2 micro-containers was confirmed by Fourier-transform infrared spectroscopy （FT-IR）, and the releasing rate of BTA from the micro-containers in simulated seawater was analyzed by ultraviolet-visible spectrophotometry （UV）, electrochemical impedance spectroscopy （EIS）, and potentiodynamic polarization curve measurement. The results indicated that BTA can be effectively encapsulated by MnO2 micro-container by desolvation process with a loading capacity up to 3.9%, and releases effectively from MnO2 micro-container in 3.5% NaCl solution, achieving the corrosion protection for copper substrate.