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Hybrid self-healing matrix using core-shell nanofibers and capsuleless microdroplets
Min Wook Lee1, Seongpil An, Changmin Lee
1School of Mechanical Engineering, §Green School, and ⊥College of Engineering, Korea University , Seoul 136-713, Republic of Korea.
ACS Applied Materials & Interfaces
|June 3, 2014
Summary
Novel hierarchical coatings with self-healing anticorrosive properties were developed. These coatings repair damage autonomously by polymerizing released components, preventing corrosion effectively.
Area of Science:
- Materials Science
- Corrosion Science
- Polymer Chemistry
Background:
- Anticorrosive coatings are crucial for material protection.
- Existing coatings often lack efficient self-repair mechanisms.
- Hierarchical structures offer potential for enhanced coating performance.
Purpose of the Study:
- To develop novel self-healing anticorrosive hierarchical coatings.
- To investigate the mechanism of autonomous damage repair in coatings.
- To evaluate the effectiveness of these coatings in preventing corrosion.
Main Methods:
- Fabrication of core-shell nanofibers using electrospinning of poly(acrylonitrile) (PAN) and dimethyl methylhydrogen siloxane.
- Incorporation of nanofibers into an epoxy-based matrix containing liquid siloxane monomer droplets.
- Assessment of self-healing properties using an electrochemical analogue of the scanning vibrating electrode technique.
Main Results:
- Successful development of hierarchical coatings with embedded self-healing capabilities.
- Demonstration of autonomous repair of coating damage through in-situ polymerization.
- Negligible electric current observed in damaged self-healing coatings after repair, indicating effective corrosion prevention.
Conclusions:
- The developed hierarchical coatings exhibit significant self-healing and anticorrosive properties.
- The core-shell nanofiber structure facilitates the release and polymerization of healing agents.
- This technology offers a promising approach for long-lasting material protection.
