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Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
Published on: August 15, 2018
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Constructing a Hydrophobic Composite Surface for Anisotropic Conductive Films with Durable Electronic
Guoxiang Zhang1,2, Wei Zhao1,2, Junhui Wei3
1Shaanxi Key Laboratory of High-Orbits-Electron Materials and Protection Technology for Aerospace, School of Advanced Materials and Nanotechnology, Xidian University, Xi'an, Shaanxi 710071, P. R. China.
ACS Applied Materials & Interfaces
|April 6, 2026
Summary
Engineered hydrophobic films (H-ACFs) enhance electronic reliability by resisting moisture degradation. This novel approach improves conductivity and durability for demanding applications.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Chemistry
Background:
- Epoxy-based anisotropic conductive films (ACFs) suffer from moisture-induced degradation due to their hydrophilic nature, limiting long-term reliability.
- Hydrophilic epoxy matrices absorb moisture, leading to performance decline in electronic interconnections.
Purpose of the Study:
- To develop an intrinsically hydrophobic anisotropic conductive film (H-ACF) with enhanced durability and reliability.
- To engineer a hydrophobic composite surface for improved resistance to hygrothermal stress.
Main Methods:
- Incorporation of core-shell structured hydrophobic alumina (H-Al2O3) nanoparticles into the epoxy surface.
- Formation of covalent Al-O-Si linkages between a fluorinated polysiloxane shell and the alumina core.
- Characterization of hydrophobicity, bonding strength, electrical conductivity, and stability under hygrothermal aging and mechanical stress.
Main Results:
- Optimized H-ACF achieved exceptional hydrophobicity (water contact angle = 157.06°) and high bonding strength (26.12 MPa).
- H-ACF demonstrated superior stability under hygrothermal aging (85 °C/85% RH) with only a 59% resistance increase compared to 228% for pristine ACF.
- Maintained hydrophobic performance after 400 abrasion cycles and 20 tape-peeling tests, confirming robust surface properties.
- Reliable Z-axis conductivity with negligible XY-plane leakage was confirmed using a self-assembled μ-LED array.
Conclusions:
- The intrinsic hydrophobic modification strategy overcomes the durability limitations of conventional ACFs.
- The developed H-ACF offers a scalable, roll-to-roll compatible solution for high-reliability electronic interconnections in humid environments.
- This approach provides a pathway to advanced materials for demanding electronic applications requiring long-term stability.
