Sandwich flexible strain sensor based on silver nanoparticles-polydopamine-carbon nanotube conductive material

LIU Caixia; LU Baisheng; LI Shuai; MA Fei; HUANG Ying; XIA Yueran

doi:10.13801/j.cnki.fhclxb.20211223.003

Volume 39 Issue 12

Dec. 2022

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Article Navigation > Acta Materiae Compositae Sinica > 2022 > 39(12): 5835-5845

LIU Caixia, LU Baisheng, LI Shuai, et al. Sandwich flexible strain sensor based on silver nanoparticles-polydopamine-carbon nanotube conductive material[J]. Acta Materiae Compositae Sinica, 2022, 39(12): 5835-5845. doi: 10.13801/j.cnki.fhclxb.20211223.003

Citation:

LIU Caixia, LU Baisheng, LI Shuai, et al. Sandwich flexible strain sensor based on silver nanoparticles-polydopamine-carbon nanotube conductive material[J]. Acta Materiae Compositae Sinica, 2022, 39(12): 5835-5845. doi: 10.13801/j.cnki.fhclxb.20211223.003

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Sandwich flexible strain sensor based on silver nanoparticles-polydopamine-carbon nanotube conductive material

doi: 10.13801/j.cnki.fhclxb.20211223.003

School of Physics & School of Microelectronics, Hefei University of Technology, Hefei 230009, China

Received Date: 2021-10-29
Accepted Date: 2021-12-13
Rev Recd Date: 2021-12-04

Available Online: 2021-12-24

Publish Date: 2022-12-01

Abstract

Abstract

Since flexible strain sensors require high sensitivity and a wide strain range in healthcare, soft robotics and human-computer interaction, this work designed a flexible strain sensor based on silver nanoparticles-polydopamine-carbon nanotubes (AgNPs-PDA-CNT) sensitive material system, and prepared a layer coated sandwich structure flexible strain sensor. The results of material characterization and property test showed that AgNPs were uniformly dispersed and fixed on the surface of PDA-CNT by virtue of PDA adhesion and reducibility. The AgNPs-PDA-CNT conductive material is closely bonded to the inner wall of silicone rubber capillary tube and polydimethylsiloxane (PDMS). AgNPs-PDA-CNT penetrates into PDMS and the concentration is in gradient distribution. The sensor has high sensitivity coefficient (GF) and wide strain range (69.04 when 0%-44%, 253.13 when 44%-66%, 1253.8 when 66%-76%), fast response (75 ms) and recovery (90 ms), good stability and repeatability. The sensor is applied to human motion monitoring, soft finger ontology sensing and soft grasping behavior monitoring, and good application results are achieved.
- strain sensor,
- carbon nanotubes,
- polydopamine,
- silver nanoparticles,
- polydimethylsiloxane,
- flexible
Long Abstrsct
Innovation Points

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References(28)

References

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