Abstract
In this work, nanocellulose was used as a polymer substrate to obtain a biodegradable bend sensor. Nanocellulose was extracted from reed stalks by an environmentally friendly organosolv method, followed by cellulose oxidation in the 2,2,6,6-tetramethylpiperidine-1-oxyl reagent (TEMPO). Flexible bend sensors consist from nickel thin films, deposited by RF magnetron sputtering, on the surface of the nanocellulose. The influence of the overall size of nickel busbars and their resistivity on piezoresistive parameters of flexible sensors was established. It was determined that the maximum bend sensitivity was <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$975\times 10^{-3}$</tex> % for a nickel busbar with a width of 1 mm, a thickness of 250 nm and a length of 9 mm. and The magnitude of drift in time was 0,022 %/min. Obtained bend sensors were subject to soil burial degradation tests. After two months of testing, it was shown a significant mass loss for all samples (up to 60%).
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