|
Authors
|
Krause, B.; Staudinger, U.; Pötschke, P.
|
|
Title
|
Biopolymer based conductive nanocomposites for thermoelectric and vapor sensing applications
|
|
Date
|
27.08.2024
|
|
Number
|
0
|
|
Abstract
|
Electrically conductive polymer composites (CPCs) based on polycaprolactone and polylactide and filled with singlewalled carbon nanotubes (SWCNTs) were prepared by melt processing to develop functional materials. Such CPCs are applicable as thermoelectric materials to convert waste heat into voltage and as sensor materials for the detection of organic solvent vapors. In the present study, polycaprolactone and polylactide composites filled with singlewalled carbon nanotubes (SWCNTs) were investigated. A very low electrical percolation threshold of 0.075 wt% was observed for both matrices. In terms of thermoelectric properties, the p-type composites exhibited a Seebeck coefficient of up to 50.8 μV K−1 and a power factor of 0.57 μW·m−1·K−2. By adding polyethylene glycol, n-type materials with up to −40.2 μV K−1 and 0.13 μW·m−1·K−2 could be developed. In addition, such composites with SWCNT content of only 0.1 wt% are very suitable for sensing organic solvents such as acetone or ethyl acetate. The effect of the vapour causes the polymer matrix to swell, which leads to an expansion of the conductive filler network and thus to a considerable increase in resistance.
|
|
Publisher
|
Elsevier
|
|
Wikidata
|
|
|
Citation
|
in: Reference Module in Materials Science and Materials Engineering / Elsevier, 2024. In Press; ISBN 978-0-12-803581-8
|
|
DOI
|
https://doi.org/10.1016/B978-0-323-95486-0.00063-6
|
|
Tags
|
Book Chapters
|
