Conductive Thermoplastic Polyurethane Nanocomposite Foams Derived from a Cellulose/MWCNTs Aerogel Framework: Simultaneous Enhancement of Piezoresistance, Strength, and Endurance

Yanpei Fei; Feng Chen; Wei Fang; Aleksander Hejna; Lixin Xu; Tong Liu; Zhong Mingqiang; Jintao Yang; Tairong Kuang

doi:10.1039/d1tc02874j

Conductive Thermoplastic Polyurethane Nanocomposite Foams Derived from a Cellulose/MWCNTs Aerogel Framework: Simultaneous Enhancement of Piezoresistance, Strength, and Endurance

Abstract

High conductivity and excellent mechanical properties of composite polymers favors their application as piezoresistive strain sensors. Nonetheless, it is difficult to develop composite polymers with desirable piezoresistance, mechanicaland durable properties. Herein, we developed conductive cellulose/MWCNTs aerogel using the freeze-drying technique. Besides, we explored the application of the highly-sensitive piezoresistive polymer following supercritical carbon dioxide (ScCO2) foaming, in cellulose/MWCNTs aerogel-thermoplastic polyurethane (TPU) nanocomposites. Due to the low density (~0.15 g/cm3) of cellulose/MWCNTs, high porosity (90%) and high electric conductivity (2.04 S/m, cellulose/MWCNTs= 1/10), the CPC foam exhibited a remarkable low percolation threshold (MWCNTs loading of ~0.07%) and high piezoresistive sensitivity (GF value of 7.84). Nevertheless, the microcellular structure of composite foam remains stable with regard to energy loss coefficient and piezoresistance after several compression cycles (1000 cycles). The behavior of the prepared composite foams under different conditions was also evaluated. Overall, the piezoresistive sensors can be used in real-time monitoring of human movement.

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Authors (9)

Yanpei Fei
Feng Chen
Wei Fang
Aleksander Hejna dr inż.
Lixin Xu
Tong Liu
Zhong Mingqiang
Jintao Yang
Tairong Kuang

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Keywords

CONDUCTIVE POLYMER COMPOSITES, AEROGEL, PIEZORESISTIVE, FREEZE-DRYING, SUPERCRITICAL CO2 FOAMING

Details

Category:

Articles

Type:

artykuły w czasopismach

Published in:

Journal of Materials Chemistry C no. 9, pages 13103 - 13114,
ISSN: 2050-7526

Language:

English

Publication year:

2021

Bibliographic description:

Fei Y., Chen F., Fang W., Hejna A., Xu L., Liu T., Mingqiang Z., Yang J., Kuang T.: Conductive Thermoplastic Polyurethane Nanocomposite Foams Derived from a Cellulose/MWCNTs Aerogel Framework: Simultaneous Enhancement of Piezoresistance, Strength, and Endurance// Journal of Materials Chemistry C -Vol. 9,iss. 38 (2021), s.13103-13114

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