Development of self-contained microcapsules for optimised catalyst position in self-healing materials

Thumbnail Image
Files
1-s2.0-S0032386119310900-main.pdf (1.35 MB)
Identifiers
ISSN: 0032-3861
DOI: 10.1016/j.polymer.2019.122084
Publication date
2020-01-20
Authors
Advisors
Journal Title
Journal ISSN
Volume Title
Publisher
Citations
Google Scholar
Export
Research Projects
Organizational Units
Journal Issue
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.
Description
Publisher Copyright: © 2019 Elsevier Ltd
Keywords
Microcapsules , Self-contained , Self-healing , Suspension polymerization , Microcapsules , Self-contained , Self-healing , Suspension polymerization , Organic Chemistry , Polymers and Plastics , Materials Chemistry , Project ID , info:eu-repo/grantAgreement/EC/FP7/605412/EU/SELF-HEALING POLYMERS FOR CONCEPTS ON SELF-REPAIRED AERONAUTICAL COMPOSITES/HIPOCRATES , 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 , European Commission, FP7, 605412, HIPOCRATES
Type
journal article
Citation
Rodriguez , R , Bekas , D G , Flórez , S , Kosarli , M & Paipetis , A S 2020 , ' Development of self-contained microcapsules for optimised catalyst position in self-healing materials ' , Polymer , vol. 187 , 122084 , pp. 122084 . https://doi.org/10.1016/j.polymer.2019.122084