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High-sensitive MwCNTs/CMC/PDMS flexible capacitive pressure sensor prepared through ice template method and its wearable applications

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Abstract

In recent years, pressure sensors with high sensitivity and flexibility have been widely used in the fields of wearable electronics, soft robots, medical monitoring, and so on. In this paper, a through-hole structure comprising of multi-walled carbon nanotubes (MwCNTs)/carboxymethyl cellulose (CMC)/polydimethylsiloxane (PDMS) was constructed through an ice template method and then it functioned as the dielectric layer of a newly made flexible capacitive pressure sensor. The sensitivity, stability, response time, and human applicability of the sensor were fully studied. The experimental method with ice template has the advantages of environmental protection and safety. More importantly, through the regulation of chemical composition, the porous sponge can have a specific pore morphology. The experimental e results showed that the dielectric layer with a through-hole structure had been built successfully and the PDMS resin was impregnated into the through-hole structure. The MwCNTs/CMC/PDMS capacitive pressure sensor possessed a high sensitivity (~ 2.143 kPa−1) and good stability in the low-pressure range (0–1 kPa). Moreover, a low detection limit (~ 3 Pa) and fast response time (~ 250 ms) were obtained. Human applicability tests revealed that our flexible sensor could catch the response of the human body swiftly so that it exhibited bright application prospects in wearable electronics.

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Funding

This work was supported by the Youth Foundation Fund of Shanghai Institute of Ceramics, Chinese Academy of Sciences (Grant No. 552022000306).

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Authors and Affiliations

  1. Information Materials and Devices Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 585 Heshuo Road, Shanghai, 201800, China

    Haiyi Peng, Huixing Lin, Xiaogang Yao & Huarong Zeng

  2. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Chinese Academy of Sciences Fujian Institute of Research on the Structure of Matter, 8 Gaoxin Road, Fuzhou, 350108, China

    Feifei Wang

Authors
  1. Haiyi Peng
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  2. Feifei Wang
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  3. Huixing Lin
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  4. Xiaogang Yao
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  5. Huarong Zeng
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Contributions

HP conceived and designed the experiments, and HZ supervised the complete research. FW prepared the samples, performed the experiments, and HL and XY collected and anlyzed the data. The manuscript was writed by HP and revised by HL.

Corresponding authors

Correspondence to Feifei Wang or Huarong Zeng.

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Peng, H., Wang, F., Lin, H. et al. High-sensitive MwCNTs/CMC/PDMS flexible capacitive pressure sensor prepared through ice template method and its wearable applications. J Mater Sci: Mater Electron 34, 1288 (2023). https://doi.org/10.1007/s10854-023-10638-w

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