TY - JOUR
T1 - Mechanochromic response of pyrene functionalized nanocomposite hydrogels
AU - Cellini, Filippo
AU - Block, Leanne
AU - Li, Jie
AU - Khapli, Sachin
AU - Peterson, Sean D.
AU - Porfiri, Maurizio
N1 - Funding Information:
This research was conducted with the support of the National Science Foundation through Grant No. CBET-1332204 . The authors also acknowledge support from the Office of Naval Research through Grant No. N00014-10-1-0988 , which has allowed the acquisition of equipment used in this study. The authors want to thank Dr. Avi Ulman and the Institute for Engineered Interfaces (IEI) at the New York University Tandon School of Engineering for granting access to the laboratories. The authors wish to thank Dr. Kalle Levon for his insights into mechanical properties of hydrogels. The authors acknowledge the Graduate Programs Office at New York University Abu Dhabi for partially supporting Filippo Cellini's visit, during which part of the research presented herein was conducted. Finally, the authors thank Mr. Adel Shams for his careful review of the manuscript.
Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/10/29
Y1 - 2016/10/29
N2 - Mechanochromic polymers display detectable changes in their fluorescence emission upon deformation of their macromolecular structure. Here, we study reversible mechanochromism of pyrene functionalized nanocomposite hydrogels. Highly stretchable nanocomposite hydrogels are prepared by free radical polymerization of poly(N-isopropylacrylamide) and pyrene terminated poly(ethylene) glycol methacrylate copolymers in the presence of nanoclay, acting as the physical crosslinker. Mechanochromic behavior is characterized through uniaxial tensile experiments, where force, deformation, and fluorescence emission are simultaneously measured. To demonstrate the application of mechanochromic nanocomposite hydrogels in pressure sensing, membranes are used to detect differential pressures on the order of 102 Pa. We envision the integration of these mechanochromic hydrogels in the design of novel force and pressure sensors with application to mechanics, fluid dynamics, and biophysics.
AB - Mechanochromic polymers display detectable changes in their fluorescence emission upon deformation of their macromolecular structure. Here, we study reversible mechanochromism of pyrene functionalized nanocomposite hydrogels. Highly stretchable nanocomposite hydrogels are prepared by free radical polymerization of poly(N-isopropylacrylamide) and pyrene terminated poly(ethylene) glycol methacrylate copolymers in the presence of nanoclay, acting as the physical crosslinker. Mechanochromic behavior is characterized through uniaxial tensile experiments, where force, deformation, and fluorescence emission are simultaneously measured. To demonstrate the application of mechanochromic nanocomposite hydrogels in pressure sensing, membranes are used to detect differential pressures on the order of 102 Pa. We envision the integration of these mechanochromic hydrogels in the design of novel force and pressure sensors with application to mechanics, fluid dynamics, and biophysics.
KW - Fluorescence sensing
KW - Mechanochromism
KW - Monomer-excimer fluorescence
KW - Nanocomposite hydrogel
KW - Pressure sensing
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U2 - 10.1016/j.snb.2016.04.149
DO - 10.1016/j.snb.2016.04.149
M3 - Article
AN - SCOPUS:84971452339
SN - 0925-4005
VL - 234
SP - 510
EP - 520
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -