NDLI: Flexible Composites with Variable Conductivity and Memory of Deformation Obtained by Polymerization of Polyaniline in PVA Hydrogel.

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Flexible Composites with Variable Conductivity and Memory of Deformation Obtained by Polymerization of Polyaniline in PVA Hydrogel.

Content Provider	Europe PMC
Author	Honciuc, Andrei Solonaru, Ana-Maria Teodorescu, Mirela
Editor	Aziz, Shazed
Copyright Year	2022
Abstract	Flexible materials that provide an electric, magnetic, or optic response upon deformation or tactile pressure could be important for the development of smart monitors, intelligent textiles, or in the development of robotic skins. In this work we demonstrate the capabilities of a flexible and electrically conductive polymer material that produces an electrical response with any deformation, namely the electrical resistance of the material changes proportionally with the deformation pressure. Furthermore, the material exhibits a memory effect. When compressed beyond the elastic regime, it retains the memory of the plastic deformation by increasing its resistance. The material was obtained by in situ polymerization of semiconducting polyaniline (PANi) in a polyvinyl alcohol/glycerol (PVA/Gly) hydrogel matrix at −17 °C. Upon drying of the hydrogel, an elastomer composite is obtained, with rubber-like characteristics. When compressed/decompressed, the electrical resistance of the material exhibits an unusually long equilibration/relaxation time, proportional with the load applied. These phenomena indicate a complex relaxation and reconfiguration process of the PANi/PVA elastomer matrix, with the shape change of the material due to mechanical stress.
Journal	Polymers
Volume Number	14
PubMed Central reference number	PMC9657478
Issue Number	21
PubMed reference number	36365631
e-ISSN	20734360
DOI	10.3390/polym14214638
Language	English
Publisher	MDPI
Publisher Date	2022-10-31
Access Restriction	Open
Rights License	Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). © 2022 by the authors.
Subject Keyword	conductive rubber conductive polymers conductive composites polyaniline hydrogel viscoelastic composites
Content Type	Text
Resource Type	Article
Subject	Chemistry Polymers and Plastics

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