Mechanochromic response of pyrene functionalized nanocomposite hydrogels

SENSORS AND ACTUATORS B-CHEMICAL

卷:234

Article

Cellini, Filippo¹  Block, Leanne¹  Li, Jie¹  Khapli, Sachin²  Peterson, Sean D.^1,3  Porfiri, Maurizio¹ 

[1] NYU, Dept Mech & Aerosp Engn, Tandon Sch Engn, Six MetroTech Ctr, Brooklyn, NY 11201 USA

[2] New York Univ Abu Dhabi, Div Engn, Abu Dhabi 129188, U Arab Emirates

[3] Univ Waterloo, Dept Mech & Mechatron Engn, Waterloo, ON N2L 3G1, Canada

关键词: Fluorescence sensing;    Monomer-excimer fluorescence;    Mechanochromism;    Nanocomposite hydrogel;    Pressure sensing;   

DOI  :  10.1016/j.snb.2016.04.149

来源: Elsevier

【 摘 要 】

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 10(2) 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. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free