TY - JOUR
T1 - In situ temperature sensing with fluorescent chitosan-coated PNIPAAm/alginate beads
AU - Barbieri, Michele
AU - Cellini, Filippo
AU - Cacciotti, Ilaria
AU - Peterson, Sean D.
AU - Porfiri, Maurizio
N1 - Funding Information:
This research was supported by the National Science Foundation through Grant No. CBET-1332204. The authors also acknowledge the support of the Office of Naval Research through Grant No. N00014-10-1-0988 that has allowed the acquisition of equipment used in this study. The first author acknowledges New York University for the hospitality during his visit in 2016 when this work was completed.
Publisher Copyright:
© 2017, Springer Science+Business Media, LLC.
PY - 2017/10/1
Y1 - 2017/10/1
N2 - The interest in the development of non-contact temperature sensors for particle image velocimetry (PIV) is continuously growing. The integration of thermochromic tracers in PIV represents a critical step forward in experimental fluid mechanics, which would enable detailed full-field analysis of thermal and environmental flows. In this paper, interpenetrated polymer networks (IPN) PNIPAAm/alginate loaded with Nile Red (NR) fluorescent dye are used to develop beads for simultaneous non-contact temperature sensing and flow tracing in fluids. The novel IPN beads are coated with chitosan to properly modulate particle permeability in water. The thermochromic response of the fluorescent tracers is studied through fluorescence spectroscopy, evidencing an increase in the NR fluorescence emission up to twenty times above the lower critical solution temperature of PNIPAAm. These findings confirm the potential of fluorescent chitosan-coated PNIPAAm/alginate beads for in situ temperature in PIV.
AB - The interest in the development of non-contact temperature sensors for particle image velocimetry (PIV) is continuously growing. The integration of thermochromic tracers in PIV represents a critical step forward in experimental fluid mechanics, which would enable detailed full-field analysis of thermal and environmental flows. In this paper, interpenetrated polymer networks (IPN) PNIPAAm/alginate loaded with Nile Red (NR) fluorescent dye are used to develop beads for simultaneous non-contact temperature sensing and flow tracing in fluids. The novel IPN beads are coated with chitosan to properly modulate particle permeability in water. The thermochromic response of the fluorescent tracers is studied through fluorescence spectroscopy, evidencing an increase in the NR fluorescence emission up to twenty times above the lower critical solution temperature of PNIPAAm. These findings confirm the potential of fluorescent chitosan-coated PNIPAAm/alginate beads for in situ temperature in PIV.
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U2 - 10.1007/s10853-017-1345-6
DO - 10.1007/s10853-017-1345-6
M3 - Article
AN - SCOPUS:85022231010
SN - 0022-2461
VL - 52
SP - 12506
EP - 12512
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 20
ER -