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- Title
Fluorescence Detection of Microcapsule-Type Self-Healing, Based on Aggregation-Induced Emission.
- Authors
Song, Young Kyu; Kim, Beomjin; Lee, Tae Hee; Kim, Jin Chul; Nam, Joon Hyun; Noh, Seung Man; Park, Young Il
- Abstract
An extrinsic self-healing coating system containing tetraphenylethylene (TPE) in microcapsules was monitored by measuring aggregation-induced emission (AIE). The core healing agent comprised of methacryloxypropyl-terminated polydimethylsiloxane, styrene, benzoin isobutyl ether, and TPE was encapsulated in a urea-formaldehyde shell. The photoluminescence of the healing agent in the microcapsules was measured that the blue emission intensity dramatically increased and the storage modulus also increased up to 105 Pa after the photocuring. These results suggested that this formulation might be useful as a self-healing material and as an indicator of the self-healing process due to the dramatic change in fluorescence during photocuring. To examine the ability of the healing agent to repair damage to a coating, a self-healing coating containing embedded microcapsules was scribed with a razor. As the healing process proceeded, blue light fluorescence emission was observed at the scribed regions. This observation suggested that self-healing could be monitored using the AIE fluorescence.
- Subjects
TETRAPHENYLETHYLENE; SELF-healing materials; MOLECULAR capsules; PHOTOLUMINESCENCE measurement; PHOTOCHEMICAL curing
- Publication
Macromolecular Rapid Communications, 2017, Vol 38, Issue 6, pn/a
- ISSN
1022-1336
- Publication type
Article
- DOI
10.1002/marc.201600657