武亚琪,邢锦娟,陈曹玥,刘琳.pH响应的TiO2基纳米容器的制备及缓蚀性能[J].表面技术,2022,51(4):211-218, 235.
WU Ya-qi,XING Jin-juan,CHEN Cao-yue,LIU Lin.Preparation and Anticorrosion Performance of pH-responsive TiO2 Based Nanocontainers[J].Surface Technology,2022,51(4):211-218, 235 |
| pH响应的TiO2基纳米容器的制备及缓蚀性能 |
| Preparation and Anticorrosion Performance of pH-responsive TiO2 Based Nanocontainers |
| 投稿时间：2021-05-23 修订日期：2021-10-25 |
| DOI：10.16490/j.cnki.issn.1001-3660.2022.04.021 |
| 中文关键词: 二氧化钛 苯并三氮唑 纳米容器 环氧树脂 抗腐蚀性 |
| 英文关键词:titanium dioxide azimidobenzene nanocontainer epoxy anti-corrosion |
| 基金项目:国家自然科学基金(21878024);辽宁省高等学校创新团队项目(2018479-14，LT2015001) |
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| 中文摘要: |
| 目的 提高环氧树脂涂层对钢片的耐腐蚀性。方法 采用水热法和NaF刻蚀法合成了中空TiO2纳米颗粒，以此为材料基底，在TiO2内部封装了苯并三氮唑(BTA)缓蚀剂，并以正硅酸乙酯(TEOS)和3-氨丙基三乙氧基硅烷(APTES)为硅源，在封装BTA缓蚀剂的TiO2外表面包覆了硅膜。采用扫描电子显微镜(SEM)、傅里叶变换红外光谱仪(FTIR)、X射线光电子能谱仪(EDS)、X射线粉末衍射仪(XRD)、热重分析仪(TGA)及紫外-可见吸收光谱仪(UV-Vis)等，对纳米容器(TiO2@BTA@SiO2)的微观形貌、物相和结构进行了表征，并通过UV-Vis测试了纳米容器在不同pH值(2、4、7)下BTA的释放行为。采用极化曲线测定了钢片在不含和含有修饰TiO2的0.3% NaCl溶液中不同pH值下的抗腐蚀行为。结果 pH=2时纳米容器中封装的BTA释放率最大，超过90%的BTA在24 h内释放出来，腐蚀抑制率为80.7%。经交流阻抗(EIS)测试表明，在浸泡周期(1~7 d)内epoxy@修饰TiO2涂层的阻抗变化值基本维持在1个数量级以内，并且阻抗性能整体高于空白涂层。结论 TiO2@BTA@SiO2纳米颗粒的掺杂提高了环氧树脂涂层的耐腐蚀性能，延长了涂层的使用时间。 |
| 英文摘要: |
| This paper aims to enhance the anti-corrosion of epoxy coating to steel sheet. The hollow TiO2 nanoparticles were synthesized by hydrothermal reaction and sodium fluoride sculpture. With this TiO2 was used as the substrate to load the corrosion inhibitor azimidobenzene (BTA). The TiO2 outer shell encapsulated with BTA was modified by a silicon dioxide film with ethylsilicate (TEOS) and (3-aminopropyl) triethoxysilane (APTES) as silicon sources. The microstructure, phase and structure were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (EDS), X-ray powder diffractometer (XRD), thermal gravimetric analyzer (TGA) and ultraviolet- visible spectrum (UV-Vis). The release behavior of BTA at different pH values (2, 4, 7) was investigated use ultraviolet-visible spectrum analysis. The anti-corrosion behavior of steel sheets in 0.3% NaCl solutions without and with modified TiO2 at different pH values was measured by polarization curves. The results indicated that when pH values were adjusted to 2, BTA encapsulated in nanocontainers release rate was the highest, approximately 90% of BTA released within 24 h, and the corrosion inhibition rate reached to 80.7%. Studied by using electrochemical impedance spectroscopy (EIS) showed that the epoxy@modified TiO2 coating was basically maintained within one order of magnitude during the soaking period (1~7 d) and it had better corrosion resistance than the blank epoxy coating. In conclusion, the doping of TiO2@BTA@SiO2 nanoparticles improves the corrosion resistance of epoxy resin coating and prolongs the use time of the coating. |
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