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Fluorescence Detection of Microcapsule‐Type Self‐Healing, Based on Aggregation‐Induced Emission
Author(s) -
Song Young Kyu,
Kim Beomjin,
Lee Tae Hee,
Kim Jin Chul,
Nam Joon Hyun,
Noh Seung Man,
Park Young Il
Publication year - 2017
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201600657
Subject(s) - self healing , fluorescence , tetraphenylethylene , materials science , coating , wound healing , aggregation induced emission , chemical engineering , polymer chemistry , composite material , optics , medicine , physics , alternative medicine , pathology , immunology , biology , engineering
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 10 5 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.