Preparation of an Organosilicon‐Modified Micro‐Nano Symbiotic Superhydrophobic Surface by a One‐Step Spray Method

Abstract Superhydrophobic surfaces' long‐term applications and environmentally friendly manufacturing processes are long popular but challenging research topics. In this work, three functionalized silane coupling agents (SCAs) are developed that possess both surface activity and coupling properties and are perfectly tailored to the manufacturing conditions of superhydrophobic surfaces. The SCAs containing polyether groups are produced on the basis of hydrosilylation without the use of fluorosilane. They are also employed for the in situ synthesis of low surface energy nano‐SiO₂ solutions, which are then sprayed onto the surfaces of various substrates to create stable and wear‐resistant protective layers. This demonstrates the Cassie–Baxter wetting model. The polyether groups' chain length, morphology, and degree of polymerization allow for the free adjustment of the layers' superhydrophobicity. Methyl blue, ink, and glycerinum have contact angles (CAs) of 153.01°, 152.09°, and 150.02°, and the sliding angles (SAs) are 2°, 2°, and 4°, respectively. Furthermore, in tests of durability and corrosion resistance, the CAs typically stay above 150°, demonstrating superior superhydrophobicity capabilities. The large‐scale replication of the fluorine‐free production process of the superhydrophobic layers discussed in this work is crucial for the expansion of practical applications.