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A facile dip-coating process for preparing highly durable superhydrophobic surface with multi-scale structures on
Zhe Cui1, Long Yin, Qingjun Wang
1Polymer Science and Engineering Department, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China.
Journal of Colloid and Interface Science
|June 26, 2009
Summary
Researchers developed durable superhydrophobic surfaces on epoxy paint using a cost-effective dip-coating method. This novel technique creates multi-scale nano/microstructures, achieving high water repellency and stability for various applications.
Area of Science:
- Materials Science
- Surface Chemistry
- Nanotechnology
Background:
- Developing superhydrophobic surfaces is crucial for applications requiring self-cleaning and anti-fouling properties.
- Existing methods for creating superhydrophobic surfaces often involve complex procedures or expensive materials.
Purpose of the Study:
- To develop a feasible, low-cost method for fabricating durable superhydrophobic epoxy paint surfaces.
- To create surfaces with multi-scale nano/microstructures for enhanced water repellency.
Main Methods:
- Microstructures were created on epoxy paint via sandblasting.
- Nanostructures were introduced using nano-silica (SiO(2)) particles via dip-coating (M1).
- Surface energy was further reduced using aminopropyl terminated polydimethylsiloxane (ATPS) modified epoxy adhesive via dip-coating (M2).
Main Results:
- Achieved a water contact angle of 167.8 degrees and a sliding angle of 7 degrees.
- Demonstrated excellent durability against high-speed scouring and stability in aqueous solutions and organic solvents.
- Successfully fabricated large-scale samples with good surface homogeneity at a very low cost.
Conclusions:
- The dip-coating method provides an effective and scalable approach to create durable superhydrophobic epoxy paint surfaces.
- The multi-scale nano/microstructure design significantly enhances hydrophobicity and surface stability.
- This cost-effective fabrication technique holds promise for widespread industrial applications.
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