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Updated: Feb 12, 2026

Author Spotlight: Microfluidic Channel-Based Soft Electrodes and Their Application in Capacitive Pressure Sensing
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Development of a Waterproof Crack-Based Stretchable Strain Sensor Based on PDMS Shielding.

Seong Kyung Hong1, Seongjin Yang2, Seong J Cho3

  • 1Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang 790-784, Korea. skhong@postech.ac.kr.

Sensors (Basel, Switzerland)
|April 13, 2018
PubMed
Summary

A new waterproof stretchable strain sensor shielded with poly(dimethylsiloxane) (PDMS) maintains reliable performance in humid conditions. This innovation enhances its suitability for underwater and wearable applications.

Keywords:
PDMS shieldingcrack-based stretchable strain sensorunderwater strain sensingwaterproof sensor

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Area of Science:

  • Materials Science
  • Sensor Technology
  • Mechanical Engineering

Background:

  • Stretchable strain sensors are crucial for various applications but often suffer from performance degradation due to humidity.
  • The omni-purpose stretchable strain (OPSS) sensor, based on a metal cracking structure, offers wide sensing range and high sensitivity.
  • Humidity can alter the electrical conductivity of OPSS sensors, impacting their reliability.

Purpose of the Study:

  • To design and develop a waterproof, humidity-independent stretchable strain sensor.
  • To investigate the use of poly(dimethylsiloxane) (PDMS) as a shielding layer to mitigate humidity effects.
  • To evaluate the strain sensing performance of the shielded sensor in high humidity environments.

Main Methods:

  • Utilized a previously developed omni-purpose stretchable strain (OPSS) sensor as the base design.
  • Applied a poly(dimethylsiloxane) (PDMS) layer to shield the OPSS sensor from environmental humidity.
  • Characterized the electrical and sensing properties of the PDMS-shielded sensor under varying humidity conditions.

Main Results:

  • The PDMS-shielded OPSS sensor demonstrated stable electrical characteristics, unaffected by humidity changes.
  • The sensor maintained its original strain sensing capabilities, including high sensitivity and wide range.
  • The waterproof design proved effective in high humidity and simulated underwater environments.

Conclusions:

  • The PDMS-shielded waterproof OPSS sensor offers reliable strain sensing performance independent of humidity.
  • The developed sensor is suitable for applications in challenging environments, including underwater settings.
  • Potential applications include motion monitoring, medical robotics, and wearable healthcare devices.