Self-Healing Abilities of Shape-Memory Epoxy-Contained Polycaprolactone Microspheres Filled with Cerium(III) Nitrate Coated on Aluminum 2024-T3 | Zendy

Pakapa Thiangpak | Zendy; Aphichart Rodchanarowan | Zendy

Open Access

Self-Healing Abilities of Shape-Memory Epoxy-Contained Polycaprolactone Microspheres Filled with Cerium(III) Nitrate Coated on Aluminum 2024-T3

Author(s) -

Pakapa Thiangpak,

Aphichart Rodchanarowan

Publication year - 2020

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.0c02622

Subject(s) - materials science , epoxy , polycaprolactone , scanning electron microscope , coating , cerium , dielectric spectroscopy , composite material , scratch , cerium nitrate , aluminium , chemical engineering , electrochemistry , metallurgy , polymer , chemistry , electrode , engineering

The shape-memory epoxy (SME) mixed with 10 wt % polycaprolactone (PCL) microspheres containing 5% cerium(III) nitrate (Ce(NO 3 ) 3 ) (PCL5Ce) was coated on an aluminum plate 2024-T3 to investigate the self-healing property. The coating was scratched and heated at 80 °C for 30 min to activate the self-healing mechanism and compare with a nonscratched coating. Surface morphology was investigated by scanning electron microscopy. The scratch was completely healed by the PCL5Ce via a thermally assisted self-healing process. Based on electrochemical impedance spectroscopy, the postheated scratched coating had shown impedance values close to the nonscratched coating, which indicated that corrosion resistivity was restored. Ce(NO 3 ) 3 content at the scratched area was analyzed by focused ion beam-scanning electron microscopy. The scratch width was healed and filled with Ce(NO 3 ) 3 . Therefore, PCL5Ce is capable of being used as an enhancing additive for the self-healing performance in SME coating.

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