基于纳米ZIF-8/ZnO构筑的超疏水涂层及其耐蚀抑菌性能
Anticorrosion and Antibacterial Enhancement by Construction of Nano-ZIF-8/ZnOBased Superhydrophobic Coatings on Aluminum Alloy
摘 要
通过电化学沉积法和水热法在AA7075铝合金表面制备了ZIF-8/ZnO层,利用超声沉积1H,1 H,2 H,2 H-全氟癸基三乙氧硅烷(PFDS)改性,构建了超疏水转化膜PFDS/ZIF-8/ZnO。采用场发射扫描电子显微镜、红外光谱、接触角测试、动电位扫描和阻抗谱,分析了超疏水转化膜的微观结构、化学性质、疏水性、耐蚀性和抑菌性能。结果表明:铝合金表面经过微纳米结构构建了超疏水膜层,其接触角达到156°;在3. 5% NaCl盐水浸泡9 d后,膜层试样低频阻抗|Z|0. 01 Hz仍然超过106 Ω ·cm2,表现出较好的耐蚀性和耐久性;抗菌测试结果表明,膜层的抑菌率可达到80. 6%,表现出良好的抗菌能力。
ZnO
ZIF-8
超疏水
耐蚀性
抑菌性能
aluminum alloy
ZnO
ZIF-8
superhydrophobicity
anticorrosion
antibacterial
Abstract
ZIF-8/ZnO layer was prepared on the surface of AA7075 aluminum alloy via electrochemical deposition and hydrothermal process, 1H,1H,2H,2H-perfluorodecyl-triethoxysilane (PFDS) was then applied to form a superhydrophobic conversion membrane (PFDS/ZIF-8/ZnO). The microstructure, chemical properties, hydrophobicity, and corrosion resistance of PFDS/ZIF-8/ZnO were analyzed by scanning electron microscopy (FESEM), Fourier transforms infrared spectroscopy (FTIR), contact angle measurement, and electrochemical impedance spectroscopy (EIS), respectively. The results showed that contact angle of PFDS/ZIF-8/ZnO reached 156°, benefiting from micro/nanostructures and low-surface energy modification. After immersing in 3. 5% NaCl solution for 9 days, |Z|0. 01 Hz (the low-frequency impedance at 0. 01 Hz) still exceeded 106 Ω ·cm2, which showed high corrosion resistance and durability. The antibacterial test results showed that the antibacterial rate of the film layer could reach 80. 6%, demonstrating good antibacterial ability.
中图分类号 TG174 DOI 10.11973/fsyfh-202310004
所属栏目 试验研究
基金项目 国家自然科学基金(51771079;52001127)
收稿日期 2022/3/12
修改稿日期
网络出版日期
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引用该论文: LIU Bing,XIAO Song,XU Bing,CAO Xiangkang,DONG Zehua. Anticorrosion and Antibacterial Enhancement by Construction of Nano-ZIF-8/ZnOBased Superhydrophobic Coatings on Aluminum Alloy[J]. Corrosion & Protection, 2023, 44(10): 18
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