Nature-inspired superhydrophobic coatings with typical Cassie-Baxter contacts garner numerous interests for multifunctional applications. However, undesirable poor mechanical and thermal stability are still crucial bottlenecks for real-world employment. This work introduces a cost-effective, fluorine free and versatile strategy to achieve double-layered PDMS agglutinated candle soot coating with superior water-repellent superhydrophobicity. The surface morphologies, chemical compositions and wettability behaviors were investigated in detail. The mechanical stability, chemical stability and durable corrosion resistance of the fabricated PDMS-CS coating were evaluated through friction, calcination and electrochemical impedance spectroscopy. The results demonstrate a remarkably enhanced mechanical robustness and corrosion resistance, indicating PDMS units can act as an effective agglutinating agent between candle soot and underlying substrate. The synergistic effect of PDMS agglutination, porous network nanostructures and extremely low surface energy of incomplete combustion induced candle soot deposition contribute to the eventually robust corrosion resisting coating, which greatly increases the possibility for practical applications.

具有典型Cassie-Baxter触点的受自然启发的超疏水涂料在多功能应用中赢得了广泛的关注。但是，不良的机械和热稳定性仍然是现实世界就业的关键瓶颈。这项工作引入了一种具有成本效益，无氟且用途广泛的策略，以实现具有优异的憎水超疏水性的​​双层PDMS凝集的蜡烛烟灰涂层。详细研究了表面形貌，化学成分和润湿性。通过摩擦，煅烧和电化学阻抗谱评估了所制备的PDMS-CS涂层的机械稳定性，化学稳定性和耐腐蚀性。结果表明机械强度和耐腐蚀性显着提高，指示PDMS单元可以充当蜡烛烟灰和下面的底材之间的有效凝集剂。PDMS凝集，多孔网络纳米结构和极低的不完全燃烧引起的蜡烛烟灰沉积的表面能的协同作用有助于最终形成坚固的抗腐蚀涂层，这大大增加了实际应用的可能性。