Abstract
Self-contained microcapsules for use in self-healing epoxy resin are successfully synthesized by suspension polymerization process. The microencapsulation of an epoxy resin using Polymethylmethacrylate (PMMA) as a shell material and the location of scandium triflate (Sc(OTf)3) as the catalyst into microcapsules shell during the microencapsulation processes is presented (PMMA/Sc(OTf)3-walled microcapsules). Spherical microcapsules of 80 μm in diameter with a liquid core content of 30 wt% (determined by HPLC) are produced. Catalyst location on microcapsules are assessed qualitatively by SEM-EADS and quantitatively by TGA showing high yields (⁓70 wt%). The evaluation of the healing efficiency was assessed in terms of fracture toughness recovery. PMMA/Sc(OTf)3-walled microcapsules showed an increased healing efficiency than that of conventional PMMA-walled capsule. The healing efficiency of the PMMA-walled capsules was 46.7 and 55.1% when the system healed at 80 and 120 °C, respectively. However, in the case of PMMA/Sc(OTf)3-walled microcapsules healing efficiency increased to 57.5 and 79.1% for the same healing temperatures.
| Original language | English |
|---|---|
| Article number | 122084 |
| Pages (from-to) | 122084 |
| Number of pages | 1 |
| Journal | Polymer |
| Volume | 187 |
| DOIs | |
| Publication status | Published - 20 Jan 2020 |
Keywords
- Microcapsules
- Self-contained
- Self-healing
- Suspension polymerization
Project and Funding Information
- Project ID
- info:eu-repo/grantAgreement/EC/FP7/605412/EU/SELF-HEALING POLYMERS FOR CONCEPTS ON SELF-REPAIRED AERONAUTICAL COMPOSITES/HIPOCRATES
- Funding Info
- European Commission, FP7, 605412, HIPOCRATES