Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China.
Chem Commun (Camb). 2023 Feb 21;59(16):2182-2198. doi: 10.1039/d2cc06688b.
Metal materials are susceptible to the influence of environmental media, and chemical or electrochemical multiphase reactions occur on the metal surface, resulting in the corrosion of metal materials, which can directly damage the geometry and reduce the physical properties of metal materials. This corrosion damage can seriously affect the long-term use of metal materials in marine equipment and the aerospace industry, and other fields. Inspired by the special microstructure and slippery properties of natural nepenthes intine, researchers have prepared slippery liquid-infused porous surfaces (SLIPS) with a stable continuous lubricant layer by injecting low-surface-energy lubricants into a substrate with a micro/nano-porous structure. This surface has excellent hydrophobicity, low friction, non-adhesiveness, and self-healing properties. The broad application prospects of SLIPS in the fields of anti-corrosion, anti-icing, anti-bacteria, and anti-fouling have made it a hot research topic directing the study of biomimetic materials at present. However, SLIPS are susceptible to environmental shear forces, such as ocean flow or extraneous fluids, resulting in destruction of the porous structure and loss of surface lubricant, thereby depriving SLIPS of the ability to protect metals from corrosion. Therefore, it is important for metal corrosion protection to find ways to improve the stability and extend the service life of SLIPS. Over the last several years, research into and development of SLIPS have come a long way. Herein, a summary of available reports on SLIPS is given in terms of design principles and their performance characteristics, the construction of rough/porous substrate structures, the choice of low-surface-energy modifiers and lubricants, and lubricant infusion methods. Ways of constructing different substrate structures and the characteristics, advantages, and disadvantages of choosing various modifiers and lubricants to prepare the surface are compared. Finally, a comprehensive summary and outlook of SLIPS with anti-corrosion properties are provided. We are convinced that a comprehensive review of SLIPS will provide important guidance and strong reference for the design and preparation of green and economical SLIPS with anti-corrosion capabilities in the future.
金属材料易受环境介质的影响，在金属表面发生化学或电化学多相反应，导致金属材料腐蚀，从而直接破坏金属材料的几何形状，降低金属材料的物理性能。这种腐蚀损伤会严重影响海洋设备和航空航天等领域金属材料的长期使用。受天然猪笼草内表皮特殊微观结构和光滑特性的启发，研究人员通过将低表面能润滑剂注入具有微/纳多孔结构的基底中，制备了具有稳定连续润滑层的滑液注入多孔表面（SLIPS）。这种表面具有优异的疏水性、低摩擦、无粘性和自修复性能。SLIPS 在防腐、防冰、抗菌和防污等领域的广泛应用前景使其成为目前仿生材料研究的热门课题。然而，SLIPS 容易受到环境剪切力的影响，如海洋流或外部流体，从而破坏多孔结构并导致表面润滑剂流失，从而使 SLIPS 失去保护金属免受腐蚀的能力。因此，寻找提高 SLIPS 稳定性和延长其使用寿命的方法对于金属腐蚀防护至关重要。在过去的几年中，SLIPS 的研究和开发已经取得了很大的进展。本文综述了 SLIPS 的设计原理及其性能特点、粗糙/多孔基底结构的构建、低表面能修饰剂和润滑剂的选择以及润滑剂注入方法。比较了构建不同基底结构的方法以及选择各种修饰剂和润滑剂来制备表面的特点、优点和缺点。最后，对具有防腐性能的 SLIPS 进行了全面总结和展望。我们相信，对 SLIPS 的全面综述将为未来具有防腐性能的绿色经济 SLIPS 的设计和制备提供重要的指导和有力的参考。
