Multifunctional Wearable Device Based on Flexible and Conductive Carbon Sponge/Polydimethylsiloxane Composite

Yuan Qing Li, Wei Bin Zhu, Xiao Guang Yu, Pei Huang, Shao Yun Fu, Ning Hu, Kin Liao

Research output: Contribution to journalArticlepeer-review

187 Scopus citations

Abstract

Wearable devices that can be used to monitor personal health, track human motions, and provide thermotherapy, etc., are highly desired in personalized healthcare. In this work, a multifunctional wearable "wrist band" which works as both heater for thermotherapy and sensor for personal health and motion monitoring is fabricated from a flexible and conductive carbon sponge/polydimethylsiloxane (CS/PDMS) composite. The key functional material of the wrist band, namely, the conductive CS, is synthesized from waste paper by a freeze-drying and high-temperature pyrolysis process. When the wrist band works as a heater under 15 V, a stable temperature difference of 20 °C is achieved between the wrist band and the ambient. When the wrist band serves as a wearable strain sensor, the wrist band exhibits fast and repeatable response and excellent durability within the strain range of 0-20% and the working frequency of 0.01-10 Hz. Finally, the typical applications of the multifunctional wearable wrist band, as a heater for thermotherapy and a sensor for blood pulse, breathe, and walk monitoring, are demonstrated. Due to its low cost, high flexibility, moderate conductivity, and excellent strain sensibility, the as-prepared wearable device based on the CS/PDMS composite is promising to be applied for the provision of personal healthcare.

Original languageBritish English
Pages (from-to)33189-33196
Number of pages8
JournalACS Applied Materials and Interfaces
Volume8
Issue number48
DOIs
StatePublished - 7 Dec 2016

Keywords

  • composite
  • heater
  • multifunctionality
  • strain sensor
  • wearable device

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