涂覆在2024-T3铝上的含形状记忆环氧树脂的聚己内酯微球填充硝酸铈的自修复能力。
Self-Healing Abilities of Shape-Memory Epoxy-Contained Polycaprolactone Microspheres Filled with Cerium(III) Nitrate Coated on Aluminum 2024-T3.
作者信息
Thiangpak Pakapa, Rodchanarowan Aphichart
机构信息
Department of Materials Engineering, Kasetsart University, Bangkok 10900, Thailand.
出版信息
ACS Omega. 2020 Sep 28;5(40):25647-25654. doi: 10.1021/acsomega.0c02622. eCollection 2020 Oct 13.
The shape-memory epoxy (SME) mixed with 10 wt % polycaprolactone (PCL) microspheres containing 5% cerium(III) nitrate (Ce(NO)) (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) content at the scratched area was analyzed by focused ion beam-scanning electron microscopy. The scratch width was healed and filled with Ce(NO). Therefore, PCL5Ce is capable of being used as an enhancing additive for the self-healing performance in SME coating.
将含有5%硝酸铈（Ce(NO)）的10 wt%聚己内酯（PCL）微球与形状记忆环氧树脂（SME）混合，涂覆在2024-T3铝板上，以研究其自修复性能。对涂层进行划痕处理，并在80°C下加热30分钟以激活自修复机制，并与未划痕的涂层进行比较。通过扫描电子显微镜研究表面形态。PCL5Ce通过热辅助自修复过程使划痕完全愈合。基于电化学阻抗谱，加热后的划痕涂层显示出与未划痕涂层接近的阻抗值，这表明耐腐蚀性得以恢复。通过聚焦离子束扫描电子显微镜分析划痕区域的Ce(NO)含量。划痕宽度愈合并填充有Ce(NO)。因此，PCL5Ce能够用作SME涂层自修复性能的增强添加剂。
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