Journal of Bionic Engineering

, Volume 15, Issue 3, pp 452–460 | Cite as

Enhancing Nucleation and Detachment of Condensed Drops by Hybrid Wetting Surfaces

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Abstract

Hybrid wetting surfaces have been developed to enhance condensation heat transfer, water collection and seawater desalination, due to the advantages of high droplet nucleation efficiency and excellent removal effect. However, there are still many difficulties to overcome before a simple, operable and low-cost system can be exploited in large-scale practical applications. In the present report, an applicable way to fabricate sprayable hybrid wetting coatings mixed with superhydrophobic and hydrophilic particles is described. Conventional condensation tests are carried out for comparison of the nucleation, growth, coalescence and ejection behaviors of dewdrops on a hybrid wetting surface with different hydrophilic particles. Test results showed that a hybrid wetting surface with superhydrophobic and hydrophilic particles has a higher drop number density than a homogeneous superhydrophobic surface has. As expected, this advantage was exhibited also in the water collection test.

Keywords

condensation heat transfer superhydrophobicity superhydrophilicity 

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Notes

Acknowledgments

This study was supported by the National Natural Science Foundation of China (51671055, 51676033), the China National Key R&D Program (2016YFC0700304).

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Copyright information

© Jilin University 2018

Authors and Affiliations

  1. 1.Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and EngineeringSoutheast UniversityNanjingChina

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