Stretchable Conductive Tubular Composites Based on Braided Carbon Nanotube Yarns with an Elastomer Matrix.

Content Provider	Europe PMC
Author	Bar, Avia J. Mead, Joey Dodiuk, Hanna Kenig, Samuel
Copyright Year	2022
Abstract	We report an innovative approach to creating stretchableconductivematerials composed of a tubular shell made from braided carbon nanotubeyarns (CNTYs) embedded in an elastomeric matrix. For stretchable electronics,both mechanical properties and electrical conductivities are of interest.Consequently, both the mechanical behavior and electrical conductivitiesunder large deformations were investigated. A new hyperelastic compositemodel was developed to predict the large deformation response to appliedstress for a braid in a tubular elastomer composite. The compositedemonstrated a hyperelastic response due to the architecture of thebraid, and the behavior was affected by the braiding angle, braidmodulus, and volume fraction of fibers. The elastomer matrix was considereda neo-Hookean material and represented by the Yeoh model. An interactionparameter was proposed to account for the effect of the elastomer/braidcooperative restriction as observed in experimental and calculatedresults. This novel approach enabled the determination of the constitutivebehavior of the composite in large deformations (>150%), takingintoaccount the elastomer and yarn properties and braid configurations.The model exhibited good agreement with the experimental results.As the CNTYs are conductive, a stretchable conductive composite wasobtained having a resistivity of 5.01 × 10–4 and 5.67 × 10–5 Ω·cm for the 1-plyand 4-ply composites, respectively. The resistivity remained constantthrough cyclic loading under large deformations in tension until mechanicalfailure. The material has potential for use in stretchable electronicsapplications.
Journal	ACS Omega
Volume Number	7
PubMed Central reference number	PMC9670722
Issue Number	45
PubMed reference number	36406545
e-ISSN	24701343
DOI	10.1021/acsomega.2c01991
Language	English
Publisher	American Chemical Society
Publisher Date	2022-11-07
Access Restriction	Open
Rights License	Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). © 2022 The Authors. Published by American Chemical Society
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering