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Dip-coating of Superhydrophobic Surface on Irregular Substrates for Dropwise Condensation

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Abstract

Herein, self-assembled superhydrophobic composite coatings were successfully prepared using a one-step dip-coating method on different irregular parts. The fluorinated nano-SiO2 particles spread into a uniform layer owing to the viscosity of the composite resin. After the optimization of the process, the fabricated nanoporous-structured coating has low adhesion properties with chemical and high thermal stabilities. After baking at 250 °C for 2 h or soaking in a solution of pH = 1 or pH = 13 for 10 days, the coating could maintain its good superhydrophobicity. The self-ejecting effects of the condensed dewdrops and droplet bounce phenomenon indicate that the coatings can be well-distributed on components of different structures, and they have significant application prospects in irregular parts and industrial production in the near future.

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Acknowledgment

We are grateful for the supports received from the National Natural Science Foundation of China (Grant No. 52071076) and Scientific Research Foundation of Graduate School of Southeast University (YBPY1875).

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Correspondence to Youfa Zhang.

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Xiao, Z., Xu, D., Zhang, W. et al. Dip-coating of Superhydrophobic Surface on Irregular Substrates for Dropwise Condensation. J Bionic Eng 18, 387–397 (2021). https://doi.org/10.1007/s42235-021-0024-0

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