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Waterborne polyurethane toughened carbon nanotube paper with excellent Joule heating properties and strain-sensing potential

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2025, 35(5), pp.2423~2434
  • DOI : 10.1007/s42823-025-00934-2
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : November 18, 2024
  • Accepted : May 31, 2025
  • Published : December 11, 2025

Chen Ru 1 Zhao Guangtai 1 Cao Xinmiao 1 Wang Wenxuan 1 Xiao Yunxiang 1 Tian Simeng 1 Dong Jize 2

1Dalian Polytechnic University
2Shenyang Jianzhu University

Accredited

ABSTRACT

Currently, carbon nanotubes (CNTs) paper (also called Buckypaper, BP) is highly promising for application in flexible electronic materials. However, the lack of flexibility and durability of BP greatly affects the comprehensive performance. Here, we propose a simple method for manufacturing a waterborne polyurethane (WPU) toughened carbon nanotube paper (WPU-BP) with excellent overall performance through vacuum filtration. In WPU-BP, as the content of WPU increased from 0 to 48.3%, the tensile strength increased from 8.08 to 16.25 MPa, and the elongation at break increased from 2.14 to 225.04%, while the conductivity decreased from 41.34 to 20.33 S/cm. The WPU-BP with the WPU content of 18.9% (CNP8) demonstrated the optimum strain sensing performance. The gauge factor of CNP8 can reach 8.57 with a response time of 145 ms. It can detect a wide range of body movements from large joint movements to slight breathing, and exhibits high stability, maintaining high stability even after 1000 cycles. In addition, CNP8 shows excellent Joule heating performance, it can reach 186.1 °C at 5 V, with heating and cooling times of only 16 and 18 s, respectively, as well as with good reproducibility. In a word, the as-prepared WPU-BP exhibits excellent both strain sensing performance and Joule heating effect, and holds significant potential for applications in heating devices and wearable sensors.

Citation status

* References for papers published after 2024 are currently being built.