Journal
NANO RESEARCH
Volume 15, Issue 10, Pages 9341-9351Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-022-4440-1
Keywords
waterproof; breathable; multifunctional flexible sensor; pressure sensing; temperature sensing
Categories
Funding
- National Natural Science Foundation of China [62174068, 61805101, 62005095, 61888102, 62104080]
- Shandong Provincial Natural Science Foundation of China [ZR2019BF013, ZR2020QF105]
- Rizhao City Key Research and Development Program [2021ZDYF010102]
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Developing a low-cost and eco-friendly method, researchers have created a waterproof and breathable cotton fabric composite decorated by reduced graphene oxide (rGO) and carbon nanotube (CNT), enabling the development of a high-sensitivity multifunctional flexible sensor for pressure and temperature detection. The sensor shows promise in continuous and reliable monitoring of human physiological information, as well as non-contact real-time monitoring of human respiration signal. The study also demonstrates the feasibility of using an array of these sensors for perceiving and mapping the pressure and temperature information of contact objects.
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 degrees 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.
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