Related Experiment Video
Updated: Nov 18, 2025
06:16
Scalable Stamp Printing and Fabrication of Hemiwicking Surfaces
Published on: December 18, 2018
7.5K
Large-Scale Fabrication of Wettability-Controllable Coatings for Optimizing Condensate Transfer Ability.
Shanlin Wang1, Xiaofeng Zhao1,2, Yuancheng Teng1
1State Key Laboratory for Environment-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, P. R. China.
Langmuir : the ACS Journal of Surfaces and Colloids
|February 5, 2021
Summary
Researchers developed a method to control surface wettability using a powder ratio. This optimizes condensate transfer ability (CTA) for enhanced heat management and water harvesting.
Area of Science:
- Materials Science
- Surface Chemistry
- Thermodynamics
Background:
- Optimizing heterogeneous hydrophilic-hydrophobic surfaces is crucial for efficient condensate transfer ability (CTA).
- Controlling surface wettability is key for applications like heat management and water harvesting.
Purpose of the Study:
- To develop an operable method for fabricating wettability-controllable coatings.
- To investigate the relationship between condensate transfer ability (CTA) and the mass ratio of superamphiphobic and superamphiphilic powder (MRP).
- To optimize surface properties for enhanced condensation heat transfer and water harvesting efficiency.
Main Methods:
- Fabrication of wettability-controllable coatings by regulating the mass ratio of superamphiphobic and superamphiphilic powder (MRP).
- Investigation of the synergistic relationship between CTA and MRP.
- Analysis of the competition between condensate condensation and detachment.
Main Results:
- Condensation and detachment dynamics were observed to be in competition.
- Initial dewing rate (phase change heat transfer capacity) increased with higher MRP.
- Long-term condensation rate was limited by excessive superamphiphilic regions.
Conclusions:
- Optimized MRP thresholds were identified for promoting condensation heat transfer (10:0-8:2) and water harvesting efficiency (10:0-4:6).
- This research provides guidance for designing heterogeneous surfaces for industrial applications.
- The findings are applicable to heat management, water harvesting, and desalination.
