文家新,刘云霞,张欣,周永福,刘克建.基于pH敏感性杂化凝胶BTA@PHVA/PEI的智能防腐涂层研究[J].表面技术,2020,49(11):277-287.
WEN Jia-xin,LIU Yun-xia,ZHANG Xin,ZHOU Yong-fu,LIU Ke-jian.Smart Anti-corrosion Coating Based on the Hybrid Hydrogel of BTA@PHVA/PEI with pH-sensitivity[J].Surface Technology,2020,49(11):277-287 |
| 基于pH敏感性杂化凝胶BTA@PHVA/PEI的智能防腐涂层研究 |
| Smart Anti-corrosion Coating Based on the Hybrid Hydrogel of BTA@PHVA/PEI with pH-sensitivity |
| 投稿时间：2020-02-15 修订日期：2020-04-21 |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.11.032 |
| 中文关键词: pH敏感性 杂化凝胶 智能涂层 腐蚀防护 Q235钢 电化学阻抗谱 |
| 英文关键词:pH-sensitivity hybrid hydrogel smart coating corrosion protection Q235 steel electrochemical impedance spectroscopy |
| 基金项目:重庆市自然科学基金面上项目(cstc2020jcyj-msxmX3461) |
| 作者 | 单位 |
| 文家新 | 重庆工业职业技术学院，重庆 401120 |
| 刘云霞 | 重庆工业职业技术学院，重庆 401120 |
| 张欣 | 重庆工业职业技术学院，重庆 401120 |
| 周永福 | 重庆工业职业技术学院，重庆 401120 |
| 刘克建 | 重庆工业职业技术学院，重庆 401120 |
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| Author | Institution |
| WEN Jia-xin | Chongqing Industry Polytechnic College, Chongqing 401120, China |
| LIU Yun-xia | Chongqing Industry Polytechnic College, Chongqing 401120, China |
| ZHANG Xin | Chongqing Industry Polytechnic College, Chongqing 401120, China |
| ZHOU Yong-fu | Chongqing Industry Polytechnic College, Chongqing 401120, China |
| LIU Ke-jian | Chongqing Industry Polytechnic College, Chongqing 401120, China |
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| 中文摘要: |
| 目的 解决Q235钢的腐蚀问题，研究开发一种智能防腐涂层。方法 以乙烯基三乙氧基硅烷、丙烯酸和丙烯酸羟丙酯为单体，采用自由基聚合法制备一种装载缓蚀剂苯并三氮唑(BTA)的pH敏感性有机-无机杂化凝胶BTA@PHVA/PEI，通过扫描电子显微镜(SEM)、傅里叶红外光谱(FT-IR)、热重/差热分析(TGA/DSC)和紫外可见光谱(UV-vis)分别对BTA@PHVA/PEI的形态、结构、热稳定性及pH敏感性进行表征。通过将BTA@PHVA/PEI粉末分散到醇酸树脂漆中，在Q235钢样品表面制备一种智能防腐涂层。先后通过电化学阻抗谱(EIS)、Tafel极化曲线对智能涂层在NaCl腐蚀介质中的自修复性能进行研究，通过盐雾加速腐蚀试验对智能涂层的防腐性能进行评价，并探讨智能涂层的自修复机理。结果 BTA@PHVA/PEI释放BTA的速率随环境pH值的升高而增大，在pH值为2.0、7.0和11.0的溶液中，BTA的32 h累积释放率分别为68.78%、74.51%和91.02%。BTA@PHVA/PEI在智能涂层中的最佳掺杂量为10%。结论 基于BTA@PHVA/PEI的智能防腐涂层对Q235钢具有显著的自修复防腐性能，且在其他金属材料上也具有潜在应用价值。其机理为涂层中掺杂的BTA@PHVA/PEI可响应因腐蚀而导致的pH值变化，释放出BTA分子并被吸附到Q235钢表面成膜，从而抑制腐蚀的进一步发展。 |
| 英文摘要: |
| The work aims to study a smart anti-corrosion coating to solve the corrosion problem of Q235 steel. Firstly, the pH-sensitive organic-inorganic hybrid hydrogel of BTA@PHVA/PEI preloaded with the inhibitor benzotriazole was prepared through free radical polymerization method with triethoxyvinylsilane, acrylic acid and hydroxypropyl acrylate as the monomers. The morphology, structure, thermostability and pH-sensitivity of BTA@PHVA/PEI were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric/differential scanning calorimetry analysis and ultraviolet-visible spectroscopy, respectively. Afterwards, a smart anti-corrosion coating was fabricated on Q235 steel by the dispersion of BTA@PHVA/PEI into alkyd resin. The self-healing performance of the smart coating in the corrosion medium of NaCl was investigated via electrochemical impedance spectroscopy and Tafel polarization curve in sequence. The anti-corrosion performance of the smart coating was evaluated by the salt spray tests. Meanwhile, the self-healing mechanism of the smart coating was also discussed. The releasing rate of BTA from BTA@PHVA/PEI rose with the increase of the external environment pH values. The cumulative releasing rate of benzotriazole for 32 h immersion in the solution with the pH values of 2.0, 7.0 and 11.0 was 68.78 wt%, 74.51 wt% and 91.02 wt%, respectively. The optimal content of BTA@PHVA/PEI doped into the smart coating was 10 wt%. The self-healing and anti-corrosion performance of the smart coating based on BTA@PHVA/PEI for Q235 steel are remarkable, which can be also used for corrosion protection of other metallic materials.The self-healing mechanism of the smart coating is that BTA@PHVA/PEI doped into the coating can release benzotriazole molecules response to the corrosion-induced changes of pH values. The released benzotriazole molecules can form an adsorptive film on the steel for preventing the corrosion development. |
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