TY - JOUR
T1 - Triple-action self-healing protective coatings based on shape memory polymers containing dual-function microspheres
AU - Huang, Yao
AU - Deng, Leping
AU - Ju, Pengfei
AU - Huang, Luyao
AU - Qian, Hongchang
AU - Zhang, Dawei
AU - Li, Xiaogang
AU - Terryn, Herman A.
AU - Mol, Johannes M.C.
PY - 2018
Y1 - 2018
N2 - In this study, a new self-healing shape memory polymer (SMP) coating was prepared to protect the aluminum alloy 2024-T3 from corrosion by the incorporation of dual-function microspheres containing polycaprolactone and the corrosion inhibitor 8-hydroxyquinoline (8HQ). The self-healing properties of the coatings were investigated via scanning electron microscopy, electrochemical impedance spectroscopy, and scanning electrochemical microscopy following the application of different healing conditions. The results demonstrated that the coating possessed a triple-Action self-healing ability enabled by the cooperation of the 8HQ inhibitor, the SMP coating matrix, and the melted microspheres. The coating released 8HQ in a pH-dependent fashion and immediately suppressed corrosion within the coating scratch. After heat treatment, the scratched coating exhibited excellent recovery of its anticorrosion performance, which was attributed to the simultaneous initiation of scratch closure by the shape memory effect of the coating matrix, sealing of the scratch by the melted microspheres, and the synergistic effect of corrosion inhibition by 8HQ.
AB - In this study, a new self-healing shape memory polymer (SMP) coating was prepared to protect the aluminum alloy 2024-T3 from corrosion by the incorporation of dual-function microspheres containing polycaprolactone and the corrosion inhibitor 8-hydroxyquinoline (8HQ). The self-healing properties of the coatings were investigated via scanning electron microscopy, electrochemical impedance spectroscopy, and scanning electrochemical microscopy following the application of different healing conditions. The results demonstrated that the coating possessed a triple-Action self-healing ability enabled by the cooperation of the 8HQ inhibitor, the SMP coating matrix, and the melted microspheres. The coating released 8HQ in a pH-dependent fashion and immediately suppressed corrosion within the coating scratch. After heat treatment, the scratched coating exhibited excellent recovery of its anticorrosion performance, which was attributed to the simultaneous initiation of scratch closure by the shape memory effect of the coating matrix, sealing of the scratch by the melted microspheres, and the synergistic effect of corrosion inhibition by 8HQ.
KW - corrosion
KW - corrosion inhibitor
KW - self-healing coating
KW - shape memory polymer
KW - smart materials
UR - http://resolver.tudelft.nl/uuid:f93ec048-007c-44b7-ac51-976d249c3864
UR - http://www.scopus.com/inward/record.url?scp=85049193266&partnerID=8YFLogxK
U2 - 10.1021/acsami.8b06985
DO - 10.1021/acsami.8b06985
M3 - Article
AN - SCOPUS:85049193266
SN - 1944-8244
VL - 10
SP - 23369
EP - 23379
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 27
ER -