RT Journal Article
T1 Development of self-contained microcapsules for optimised catalyst position in self-healing materials
A1 Rodriguez, Raquel
A1 Bekas, Dimitrios G.
A1 Flórez, Sonia
A1 Kosarli, Maria
A1 Paipetis, Alkiviadis S.
AB 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.
SN 0032-3861
YR 2020
FD 2020-01-20
LA eng
NO 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
NO Publisher Copyright: © 2019 Elsevier Ltd
DS TECNALIA Publications
RD 21 jul 2024