journal article·2024-08-23

Ultrathin Hexagonal Boron Nitride Coatings for Enhanced Condensation Heat Transfer

Yanshuang He, Jidong Li, Xiao Wang, Yubin Shan, Jingjing Yin, Jun Yin, Xuemei Li

ACS Applied Nano Materials· Volume 7· Issue 16
Publisher page

Abstract

Dropwise condensation on hydrophobic surfaces, compared to filmwise condensation on hydrophilic surfaces, is considered to be an effective means to enhance heat transfer. However, the development of technologies for promoting dropwise condensation using hydrophobic coatings has remained challenging due to the potential trade-off between enhanced hydrophobicity and increased thermal resistance associated with thicker coatings. In this study, we reported the realization of enhanced condensation heat transfer with ultrathin chemical vapor deposition of hexagonal boron nitride coatings, while maintaining robust dropwise condensation with over 120 h. Our experimental results demonstrate a 4.6-fold improvement in the heat transfer coefficient compared with filmwise condensation on bare substrates. These findings suggest that hexagonal boron nitride holds promise as a surface coating for promoting dropwise condensation of water vapor, potentially impacting various fields that rely on efficient heat transfer processes.
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Research context

OpenAlex topics: Thermal properties of materials · Surface Modification and Superhydrophobicity · Advanced Sensor and Energy Harvesting Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China

State Key Laboratory of Mechanics and Control of Aerospace Structures, Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education, and Institute for Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China

Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing 210016, P. R. China

College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China

Funding

National Key Research and Development Program of China · China Postdoctoral Science Foundation · Natural Science Foundation of Jiangsu Province · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Fund of Prospective Layout of Scientific Research for Nanjing University of Aeronautics and Astronautics · State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics

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