TY - JOUR
T1 - Self-sensing polymeric materials based on fluorescent microcapsules for the detection of microcracks
AU - Roche, Sandra
AU - Ibarz, Gemma
AU - Crespo, Cristina
AU - Chiminelli, Agustín
AU - Araújo , Andreia
AU - Santos, Raquel M.
AU - Zhang, Zhenxue
AU - Li, Xiaoying
AU - Dong, Hanshan
PY - 2022/1
Y1 - 2022/1
N2 - In this study, self-sensing materials have been developed owing to their ability to indicate material damage through an evident optical signal. For this, fluorescent core–shell microcapsules were synthesized by in situ polymerization in an oil-water emulsion. These microcapsules, embedded in a black epoxy resin, release a revealing substance during damage processes that allow microcracks detection in the material. The morphology, chemical structure, size distribution, thermal stability and mechanical properties of the fabricated microcapsules were characterized. Furthermore, the mechanical and optical characterizations of the composite were performed. As result, it has been shown how the microcracks cannot be observed under visible light but it was possible to identify and detect them under a conventional 254 nm ultraviolet (UV) lamp, introducing an additional functionality in the material for damage detection/monitoring.
AB - In this study, self-sensing materials have been developed owing to their ability to indicate material damage through an evident optical signal. For this, fluorescent core–shell microcapsules were synthesized by in situ polymerization in an oil-water emulsion. These microcapsules, embedded in a black epoxy resin, release a revealing substance during damage processes that allow microcracks detection in the material. The morphology, chemical structure, size distribution, thermal stability and mechanical properties of the fabricated microcapsules were characterized. Furthermore, the mechanical and optical characterizations of the composite were performed. As result, it has been shown how the microcracks cannot be observed under visible light but it was possible to identify and detect them under a conventional 254 nm ultraviolet (UV) lamp, introducing an additional functionality in the material for damage detection/monitoring.
KW - Fluorescent revealing substance
KW - Hot curing epoxy resin
KW - Microcapsules
KW - Polyurethane-poly(ureaformaldehyde) PU/PUF
KW - Self-sensing materials
KW - Smart polymers
UR - http://www.scopus.com/inward/record.url?scp=85121511226&partnerID=8YFLogxK
U2 - 10.1016/j.jmrt.2021.11.014
DO - 10.1016/j.jmrt.2021.11.014
M3 - Article
SN - 2238-7854
VL - 16
SP - 505
EP - 515
JO - Journal of Materials Research and Technology
JF - Journal of Materials Research and Technology
M1 - 505-515
ER -