Fluorescence Detection of Microcapsule‐Type Self‐Healing, Based on Aggregation‐Induced Emission. Issue 6 (7th February 2017)

• Record Type: Journal Article
• Authors: Song, Young Kyu; Kim, Beomjin; Lee, Tae Hee; Kim, Jin Chul; Nam, Joon Hyun; Noh, Seung Man; Park, Young Il
• Is Part Of: Macromolecular rapid communications. Volume 38:Issue 6(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-02-07
• Subjects: aggregation‐induced emission -- extrinsic self‐healing -- fluorescence detection -- microcapsule -- self‐healing -- self‐healing detection; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.201600657
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract : An extrinsic self‐healing coating containing tetraphenylethylene in microcapsules is monitored by aggregation‐induced emission (AIE). As the healing process proceeds, blue fluorescence is observed at scribed region. Self‐healing can be monitored using the AIE. 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 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.