Self-healing abilities of shape-memory polymeric coating added polycaprolactone (PCL) microspheres containing an inorganic healing agent on aluminum 2024

Name: Pakapa Thiangpak

LCSH: Kasetsart University -- Dissertations. Ph.D. (Materials Engineering) 2020

Classification :.LCCS: TA480.A6

LCSH: Kasetsart University. -- Department of Materials Engineering -- Dissertations

LCSH: Aluminum

LCSH: Aluminum -- Corrosion

LCSH: Aluminum coatings

LCSH: Polycaprolactone

LCSH: Self-healing materials

Abstract: The healing and corrosion inhibiting properties of Cerium (III) Nitrate (Ce(NO3)3) contained Polycaprolactone (PCL) microspheres created by double emulsion (w/o/w) in shape-memory epoxy on Aluminum 2024 was investigated. The particle size of PCL microspheres containing Ce(NO3)3 was successfully controlled to less than 10 µm by adjusting the stirring speed, temperature and duration of the double emulsion during the microsphere preparation process. The self-healing property of the coating was investigated experimentally by electrochemical impedance spectroscopy (EIS) measurement. The measurement for a perfect coating was compared with a scratched coating containing 5Ce10MSP added to a shape-memory epoxy that was heated at 80°C for 30 minutes. The results confirmed that 5Ce10MSP added to a shapememory epoxy was able to completely repair the damaged coating via thermally assisted self-healing. The surface morphologies of the original scratch width and width after heating at 80°C for 30 minutes were studied by Optical Microscopy (OM) and Scanning Electron Microscopy (SEM). The results showed that the scratch width or scratch closure was completely healed. The Ce(NO3)3 distribution was observed by Focused Ion Beam-Scanning Electron Microscopy (FIB-SEM). The results provided strong evidence that the scratch width completely healed and was filled by the Ce(NO3)3 inhibitor. Therefore, all results proved that 5Ce10MSP is sufficient to use as the additive to enhance the self-healing property in a shape-memory epoxy coating.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Aphichart Rodchanarowan

Role: Thesis Advisor

Created: 2020

Modified: 2568-07-19

Issued: 2025-07-11

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2563/pakapa-thi-all.pdf

CallNumber: TA480.A6 .P35

eng

DegreeName: Doctor of Philosophy

Level: Doctoral Degraee

Descipline: Materials Engineering

Grantor: Kasetsart University

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