Fluorescence Detection of Microcapsule-Type Self-Healing, Based on Aggregation-Induced Emission.
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 105Pa 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.
Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology, Ulsan, 44412, Republic of Korea.
Young Kyu
YK
Song
Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology, Ulsan, 44412, Republic of Korea.
Beomjin
B
Kim
Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology, Ulsan, 44412, Republic of Korea.|Department of Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, 44919, Republic of Korea.
Tae Hee
TH
Lee
Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology, Ulsan, 44412, Republic of Korea.
Jin Chul
JC
Kim
Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology, Ulsan, 44412, Republic of Korea.
Joon Hyun
JH
Nam
Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology, Ulsan, 44412, Republic of Korea.
Seung Man
SM
Noh
Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology, Ulsan, 44412, Republic of Korea.
Young Il
YI
Park
D002214:Capsules; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D004987:Ethers / Q000737:chemistry*; D005453:Fluorescence; D005557:Formaldehyde / Q000737:chemistry; D015394:Molecular Structure; D010316:Particle Size; D055668:Photochemical Processes; D013267:Stilbenes / Q000032:analysis* / Q000737:chemistry*; D020058:Styrene / Q000737:chemistry*; D013499:Surface Properties; D014508:Urea / Q000737:chemistry
D002214:Capsules; D004129:Dimethylpolysiloxanes; D004987:Ethers; D013267:Stilbenes; C000617116:tetraphenylethylene; D005557:Formaldehyde; D020058:Styrene; C013830:baysilon; D014508:Urea
aggregation-induced emission; extrinsic self-healing; fluorescence detection; microcapsule; self-healing; self-healing detection