Abstract
采用化学刻蚀法和复合改性两步法在黄铜基体上制备了超疏水肉豆蔻酸(MA)/TiO2涂层(E-MAT).通过接触角测量仪详细考察了刻蚀时间与刻蚀温度对黄铜疏水性能(刻蚀并改性后)的影响.结果表明,当刻蚀时间为55 min,刻蚀温度为30℃时,且经MA/TiO2复合改性的黄铜表面可获得高达167.4°的水接触角.接着,采用SEM、CLSM、EDS、XRD与FTIR对E-MAT涂层进行了形貌与成分分析.分别利用砂纸磨损与胶带剥离实验研究E-MAT涂层的机械稳定性.此外,E-MAT超疏水涂层还表现出优异的自清洁性能.在3.5％NaCl溶液中的电化学腐蚀测试显示E-MAT涂层自腐蚀电流密度下降至8.32×10-5A/cm2,腐蚀保护效率高达97.0％.可见,刻蚀-改性结合法操作简单,便于构造大面积金属基超疏水表面,具有广阔的应用前景.
A superhydrophobic myristic acid (MA)/TiO2coating (E-MAT) was prepared through a two-step process of chemical etching and composite modification on a brass surface. The effect of etching time and etching temperature on the hydrophobic properties for brass (after etching and modification with myristic acid) was investigated in detail through contact angle measuring instrument. The results show that when the etching time is 55 min and the etching temperature is 30°C, the contact angle of up to 167.4° can be obtained on the brass substrate modified by MA/TiO2composite solution. Then, the surface morphology and chemical composition of E-MAT coating were studied through SEM, CLSM, EDS, XRD and FT1R. The mechanical stability of E-MAT coating was evaluated through sandpaper abrasion and tape peeling tests, respectively. Furthermore, the prepared coating possesses excellent self-cleaning performance. The electrochemical corrosion test showed that the self-corrosion current density of E-MAT coating was reduced to 8.32×10-5A/cm2, and its corrosion protection efficiency is up to 97.0%. It can be seen that the etching-modification combination method is simple to operate, which is conducive to the fabrication of large area superhydrophobic surfaces on metal-based substrates and has broad application prospects.
A superhydrophobic myristic acid (MA)/TiO2coating (E-MAT) was prepared through a two-step process of chemical etching and composite modification on a brass surface. The effect of etching time and etching temperature on the hydrophobic properties for brass (after etching and modification with myristic acid) was investigated in detail through contact angle measuring instrument. The results show that when the etching time is 55 min and the etching temperature is 30°C, the contact angle of up to 167.4° can be obtained on the brass substrate modified by MA/TiO2composite solution. Then, the surface morphology and chemical composition of E-MAT coating were studied through SEM, CLSM, EDS, XRD and FT1R. The mechanical stability of E-MAT coating was evaluated through sandpaper abrasion and tape peeling tests, respectively. Furthermore, the prepared coating possesses excellent self-cleaning performance. The electrochemical corrosion test showed that the self-corrosion current density of E-MAT coating was reduced to 8.32×10-5A/cm2, and its corrosion protection efficiency is up to 97.0%. It can be seen that the etching-modification combination method is simple to operate, which is conducive to the fabrication of large area superhydrophobic surfaces on metal-based substrates and has broad application prospects.
| Translated title of the contribution | Fabrication and properties of superhydrophobic myristic acid/TiO2 coating on brass surface via two-step method |
|---|---|
| Original language | Chinese (Simplified) |
| Pages (from-to) | 1215-1223 |
| Number of pages | 9 |
| Journal | 功能材料 |
| Volume | 54 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 3 Feb 2023 |
User-Defined Keywords
- anti-corrosion
- brass
- mechanical stability
- superhydrophobicity
- two-step method