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Research Article

A waterproof and breathable Cotton/rGO/CNT composite for constructing a layer-by-layer structured multifunctional flexible sensor

Feifei Yin1,§, Yunjian Guo1,§, Hao Li1, Wenjing Yue1, Chunwei Zhang1, Duo Chen3, Wei Geng4, Yang Li1( ), Song Gao1( ), Guozhen Shen2( )
School of Information Science and Engineering, University of Jinan, Jinan 250022, China
School of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, China
International School for Optoelectronic Engineering, Qilu University of Technology (Shandong Academy of Science), Jinan 250353, China
Shandong Provincial Maternal and Child Health Care Hospital, Jinan 250022, China

§ Feifei Yin and Yunjian Guo contributed equally to this work.

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Graphical Abstract

A waterproof and breathable Cotton/reduced graphene oxide (rGO)/carbon nanotube (CNT) composite is proposed and reported to achieve a layer-by-layer structured multifunctional flexible sensor, enabling the high-sensitivity detection of pressure and temperature stimulus. In light of the superior pressure and temperature sensing capability, an array consisting of multifunctional flexible sensors further demonstrates the feasibility in perceiving and mapping pressure and temperature information of contact objects.

Abstract

Developing a cotton fabric sensing layer with good waterproofness and breathability via a low-cost and eco-friendly method is increasingly important for the construction of comfortable and wearable electronic devices. Herein, a waterproof and breathable cotton fabric composite decorated by reduced graphene oxide (rGO) and carbon nanotube (CNT), Cotton/rGO/CNT, is reported by a facile solution infiltration method, and we adopt such Cotton/rGO/CNT composite to develop a layer-by-layer structured multifunctional flexible sensor, enabling the high-sensitivity detection of pressure and temperature stimulus. Particularly, the multifunctional flexible sensor exhibits a high response toward tiny pressure, demonstrating salient superiority in the continuous and reliable monitoring of human physiological information. Concerning temperature sensing, a good linear response for the temperatures ranging from 28 to 40 °C is achieved by the multifunctional flexible sensor and gives rise to be successfully applied to the non-contact real-time monitoring of human respiration signal. Finally, an array consisting of multifunctional flexible sensors further demonstrates its feasibility in perceiving and mapping the pressure and temperature information of contact objects. This work provides a feasible strategy for designing cotton-based sensing layers that can effectively resist liquid water penetration and allow water vapor transmission, and offers reasonable insight for constructing comfort and multifunctional wearable electronics.

Keywords

waterproofbreathablemultifunctional flexible sensorpressure sensingtemperature sensing

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Nano Research
Volume 15 Issue 10,
October 2022
Pages 9341-9351
DOI: 10.1007/s12274-022-4440-1
Cite this article:
Yin F, Guo Y, Li H, et al. A waterproof and breathable Cotton/rGO/CNT composite for constructing a layer-by-layer structured multifunctional flexible sensor. Nano Research, 2022, 15(10): 9341-9351. https://doi.org/10.1007/s12274-022-4440-1
Topics:
Pressure sensors

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Received: 21 February 2022
Revised: 06 April 2022
Accepted: 15 April 2022
Published: 31 May 2022
© Tsinghua University Press 2022
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