Journal
JOURNAL OF INDUSTRIAL TEXTILES
Volume 51, Issue 5_SUPPL, Pages 7732S-7754SPublisher
SAGE PUBLICATIONS INC
DOI: 10.1177/15280837221094648
Keywords
Bio-materials; lignocellulosic fibers; electrical characteristics; dielectric constant; electrical conductivity; sustainability
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This study investigates the electrical characteristics of new natural composite materials and explores the emerging technology of organic transient bioelectronics. The results indicate that the filler content significantly affects the dielectric constant and AC conductivity of the composites.
The ability of biodegradable materials to be miniaturized and degrade at specific rates when subjected to certain bacterium types and/or a given range of temperatures has led to a newly emerging technology: organic transient bioelectronics. In this work, the electrical characteristics of new natural composite materials are presented. Four types of natural lignocellulosic fibers were used with polypropylene: black pepper, sumac, pomegranate, and lemon. The composites were prepared as flat smooth sheets with thicknesses similar to 1 mm. The dielectric constant and the ac conductivity of the prepared samples were determined for the frequency range of 1 KHz to 4 MH. All measurements were performed at room temperature and humidity utilizing parallel plate capacitor technique associated with high precision Hioki IM3536 LCR meter. The frequency response of the composites under study shows similar behavior to that of the pure sample but with various percentage increments. The dielectric constant shows that the consistent dispersion was highly affected by filler content specially at the low frequency side of the spectrum. The maximum recorded increment was around 55% for 30wt.% sumac samples at 1 KHz. The effect of larger filler loading concentration on the incremental change of the ac conductivity was more obvious at higher frequencies.
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