Sun Xiang, Gu Shilong, Wang Luoxin, Wang Hua, Xiong Siwei, Yin Xianze, Yang Shiwen
College of Materials Science and Engineering, State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan 430073, China.
College of Materials Science and Engineering, State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan 430073, China.
J Colloid Interface Sci. 2024 Jan 15;654(Pt A):25-35. doi: 10.1016/j.jcis.2023.09.182. Epub 2023 Sep 30.
The long-term protective efficacy of organic coatings against corrosion can be diminished by the presence of micropores/cracks and poor self-healing capabilities. To address these issues, TiC MXene was subjected to liquefaction-like treatment to maintain a two-dimensional lamellar structure in water and polymer matrix for a long time, as well as improve the dispersion stability and loading capacity of MXene. The inorganic corrosion inhibitor ferroferric oxide (FeO) was then electrostatically loaded onto MXene nanofluids to obtain a hybrid material. Through hydrogen bonding, polyvinyl alcohol (PVA) molecular chains were bridged to the hybrid material, resulting in a self-healing anti-corrosion coating. The coating exhibited excellent corrosion protection, as well as self-healing properties attributed to the labyrinth effect and corrosion inhibition of MXene@FeO hybrids. Notably, electrochemical testing demonstrated outstanding corrosion resistance of this coating on diverse substrate surfaces. In addition, the anti-corrosion coating will strongly coalesce on the surface of B-NdFeB under magnetic stimulation, realizing the localized corrosion protection of metal materials. The anti-corrosion coating can be quickly repaired under the stimulation of water as well as recovery, the anti-corrosion repair efficiency on the surface of permanent magnets is up to 92%, and the mechanical properties after recovery can be restored to 97% of the original sample. This innovative coating offers a convenient, green synthesis strategy for the construction of self-healing coatings with superior anti-corrosion properties.
有机涂层的长期防腐蚀效果可能会因微孔/裂纹的存在以及自修复能力差而降低。为了解决这些问题，对TiC MXene进行了类似液化的处理，以使其在水和聚合物基体中长时间保持二维层状结构，并提高MXene的分散稳定性和负载能力。然后将无机缓蚀剂四氧化三铁（FeO）静电负载到MXene纳米流体上，以获得一种混合材料。通过氢键作用，聚乙烯醇（PVA）分子链桥接到该混合材料上，从而形成一种自修复防腐涂层。该涂层表现出优异的防腐性能以及归因于MXene@FeO杂化物的迷宫效应和缓蚀作用的自修复性能。值得注意的是，电化学测试表明该涂层在各种基体表面都具有出色的耐腐蚀性。此外，该防腐涂层在磁刺激下会在B-NdFeB表面强烈聚结，实现金属材料的局部腐蚀防护。该防腐涂层在水的刺激下能够快速修复并恢复，永磁体表面的防腐修复效率高达92%，恢复后的力学性能可恢复到原始样品的97%。这种创新涂层为构建具有优异防腐性能的自修复涂层提供了一种便捷、绿色的合成策略。
