Experimental and numerical characterization of a flexible strain sensor based on polydimethylsiloxane polymeric network and MWCNT’s

We demonstrated the feasibility of obtaining a low-cost, flexible strain sensor by spraying a conductive thin layer of MWCNT’s over an S-pattern embedded within a PDMS matrix. The final composite conforms a dog bone-shaped tensile specimen intended to measure the strain associated with a human wrist...

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Bibliographic Details
Published in:Journal of polymer research 2024-07, Vol.31 (7), Article 211
Main Authors: Vázquez-Torres, Nadia A., Benítez-Martínez, Jorge A., Vélez-Cordero, Juan R., Sánchez-Arévalo, Francisco M.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Human motion
Industrial Chemistry/Chemical Engineering
Original Paper
Piezoresistivity
Polydimethylsiloxane
Polymer Sciences
Spraying
Wrist
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Summary:We demonstrated the feasibility of obtaining a low-cost, flexible strain sensor by spraying a conductive thin layer of MWCNT’s over an S-pattern embedded within a PDMS matrix. The final composite conforms a dog bone-shaped tensile specimen intended to measure the strain associated with a human wrist extension movement. Our sensor works with a combination of different mechanisms, such as piezoresistivity and tunneling, which depend on the level and repetitions of loads applied to the sensor. According to the reported elongation ratios, these sensors can detect large strains, up to 40%, for several uniaxial loading-unloading cycles. This makes them useful for human skin strain measurements. Graphical abstract
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-024-04048-7