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Effects of Single-Walled Carbon Nanotube on the Electrical and Mechanical Properties of Thermoplastic Polyurethane-Based Nanocomposites

Springer Proceedings in Materials, ISSN: 2662-317X, Vol: 24, Page: 227-237
2023
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Book Chapter Description

The electrically conductive thermoplastic polyurethane (TPU)-based nanocomposites were prepared using single-walled carbon nanotubes (SWCNT), and they were compared with TPU-based nanocomposites consisting of multi-walled carbon nanotubes (MWCNT). SWCNT was pre-dispersed in polyol esters as a master-batch and added into the TPU-based polymer matrix by hot-melt mixing. Electrical conductivity and mechanical properties of TPU/SWCNT with different SWCNT loadings were evaluated and compared with TPU/MWCNT nanocomposites. Results show that TPU/SWCNT nanocomposites with 0.3 wt% loading weight can achieve the same electrical conductivity as TPU/MWCNT nanocomposites with 3% loading weight. In addition, the TPU/SWCNT nanocomposites exhibited higher mechanical properties (e.g., tensile strength, elongation at break, abrasion resistance) compared to the TPU/MWCNT nanocomposites. Low electrically conductive resistance can be achieved with an extremely low loading weight of SWCNT. The TPU/SWCNT nanocomposites are suitable for applications, such as robot skins, that require both good mechanical and conductive properties.

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