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Construction of Multifunctional Liquid-Like Coatings: Heterogeneous Interface Regulation Enabling Exceptional Drag
Yongqi Zhang1,2, Jia Man1,2, Guanghui Cui1,2
1Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Ministry of Education), School of Mechanical Engineering, Shandong University, Jinan, 250061, China.
This study developed a dual-component liquid-like coating using dimethyldimethoxysilane (DMS) and perfluorooctyldimethylchlorosilane (PFOS) for superior liquid repellency and drag reduction. The novel system demonstrates excellent stability and anti-fouling properties, offering potential for diverse applications.
Area of Science:
- Materials Science
- Surface Chemistry
- Nanotechnology
Background:
- Liquid-like coatings offer ultralow viscosity and anti-fouling properties.
- Achieving a balance between low sliding angles and low surface tension repellency remains a challenge.
Purpose of the Study:
- To develop a dual-component liquid-like coating system using dimethyldimethoxysilane (DMS) and 1H,1H,2H,2H-perfluorooctyldimethylchlorosilane (PFOS).
- To achieve superior liquid repellency, drag reduction, and anti-fouling properties through heterogeneous interface regulation.
Main Methods:
- Fabrication of a dual-component coating system.
- Characterization of coating performance, including sliding angles and surface tension.
- Analysis using atomic force microscopy and molecular dynamics simulations.
Main Results:
- The developed coating exhibits low sliding angles (<3° for n-hexane) and broad-spectrum liquid repellency.
- Superior drag reduction and anti-fouling properties were observed.
- An anomalous decline in repellency was noted above a critical PFOS concentration, linked to molecular chain mobility.
Conclusions:
- The dual-component system effectively balances low sliding angles and low surface tension repellency.
- Heterogeneous interface regulation enhances molecular chain flexibility and low surface energy.
- Findings provide insights into multicomponent liquid-like coating development and dynamic wetting behavior.
