Autonomous self-healing of epoxy thermosets with thiol-isocyanate chemistry
- Author
- Xander Hillewaere (UGent) , Roberto FA Teixeira, Le-Thu T Nguyen, Jose A Ramos, Hubert Rahier and Filip Du Prez (UGent)
- Organization
- Abstract
- Thiol-isocyanate chemistry, combined with a dual capsule strategy, is used for the development of extrinsic self-healing epoxy materials. It is shown that the amine groups present in the matrix both serve as a catalyst for the addition reaction between a thiol and an isocyanate and as a way to covalently link the healed network structure to the surrounding resin. The tapered double cantilever beam (TDCB) geometry is used for evaluating the recovery of the fracture toughness at room temperature after different healing times. Using manual injection of the healing agents into the crack, a healing efficiency up to 130% is obtained for the EPIKOTE 828/DETA epoxy material. On the other hand, when two types of microcapsules, one containing a tetrathiol reagent and the other a low toxic isocyanate reagent, are incorporated into this epoxy thermoset (20 wt%), a recovery of more than 50% is reached. The influence of parameters such as the amount and core content of the microcapsules on the healing efficiency is investigated. Furthermore, the thiol-isocyanate chemistry is also tested for an industrial cold-curing epoxy resin (RIM 135/RIMH 137).
- Keywords
- COMPLEXES, CATALYST, FRACTURE, POLYMERS, MICROENCAPSULATION, COMPOSITE, MICROCAPSULE-TOUGHENED EPOXY, HEALANT, SYSTEM, REPAIR
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-5941014
- MLA
- Hillewaere, Xander, et al. “Autonomous Self-Healing of Epoxy Thermosets with Thiol-Isocyanate Chemistry.” ADVANCED FUNCTIONAL MATERIALS, vol. 24, no. 35, 2014, pp. 5575–83, doi:10.1002/adfm.201400580.
- APA
- Hillewaere, X., Teixeira, R. F., Nguyen, L.-T. T., Ramos, J. A., Rahier, H., & Du Prez, F. (2014). Autonomous self-healing of epoxy thermosets with thiol-isocyanate chemistry. ADVANCED FUNCTIONAL MATERIALS, 24(35), 5575–5583. https://doi.org/10.1002/adfm.201400580
- Chicago author-date
- Hillewaere, Xander, Roberto FA Teixeira, Le-Thu T Nguyen, Jose A Ramos, Hubert Rahier, and Filip Du Prez. 2014. “Autonomous Self-Healing of Epoxy Thermosets with Thiol-Isocyanate Chemistry.” ADVANCED FUNCTIONAL MATERIALS 24 (35): 5575–83. https://doi.org/10.1002/adfm.201400580.
- Chicago author-date (all authors)
- Hillewaere, Xander, Roberto FA Teixeira, Le-Thu T Nguyen, Jose A Ramos, Hubert Rahier, and Filip Du Prez. 2014. “Autonomous Self-Healing of Epoxy Thermosets with Thiol-Isocyanate Chemistry.” ADVANCED FUNCTIONAL MATERIALS 24 (35): 5575–5583. doi:10.1002/adfm.201400580.
- Vancouver
- 1.Hillewaere X, Teixeira RF, Nguyen L-TT, Ramos JA, Rahier H, Du Prez F. Autonomous self-healing of epoxy thermosets with thiol-isocyanate chemistry. ADVANCED FUNCTIONAL MATERIALS. 2014;24(35):5575–83.
- IEEE
- [1]X. Hillewaere, R. F. Teixeira, L.-T. T. Nguyen, J. A. Ramos, H. Rahier, and F. Du Prez, “Autonomous self-healing of epoxy thermosets with thiol-isocyanate chemistry,” ADVANCED FUNCTIONAL MATERIALS, vol. 24, no. 35, pp. 5575–5583, 2014.
@article{5941014,
abstract = {{Thiol-isocyanate chemistry, combined with a dual capsule strategy, is used for the development of extrinsic self-healing epoxy materials. It is shown that the amine groups present in the matrix both serve as a catalyst for the addition reaction between a thiol and an isocyanate and as a way to covalently link the healed network structure to the surrounding resin. The tapered double cantilever beam (TDCB) geometry is used for evaluating the recovery of the fracture toughness at room temperature after different healing times. Using manual injection of the healing agents into the crack, a healing efficiency up to 130% is obtained for the EPIKOTE 828/DETA epoxy material. On the other hand, when two types of microcapsules, one containing a tetrathiol reagent and the other a low toxic isocyanate reagent, are incorporated into this epoxy thermoset (20 wt%), a recovery of more than 50% is reached. The influence of parameters such as the amount and core content of the microcapsules on the healing efficiency is investigated. Furthermore, the thiol-isocyanate chemistry is also tested for an industrial cold-curing epoxy resin (RIM 135/RIMH 137).}},
author = {{Hillewaere, Xander and Teixeira, Roberto FA and Nguyen, Le-Thu T and Ramos, Jose A and Rahier, Hubert and Du Prez, Filip}},
issn = {{1616-301X}},
journal = {{ADVANCED FUNCTIONAL MATERIALS}},
keywords = {{COMPLEXES,CATALYST,FRACTURE,POLYMERS,MICROENCAPSULATION,COMPOSITE,MICROCAPSULE-TOUGHENED EPOXY,HEALANT,SYSTEM,REPAIR}},
language = {{eng}},
number = {{35}},
pages = {{5575--5583}},
title = {{Autonomous self-healing of epoxy thermosets with thiol-isocyanate chemistry}},
url = {{http://doi.org/10.1002/adfm.201400580}},
volume = {{24}},
year = {{2014}},
}
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