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A study on the manufacture of humidity sensors using layered silicate nanocomposite materials

  • Industry Promotion Research
  • Abbr : IPR
  • 2024, 9(1), pp.31-38
  • DOI : 10.21186/IPR.2024.9.1.031
  • Publisher : Industrial Promotion Institute
  • Research Area : Interdisciplinary Studies > Interdisciplinary Research
  • Received : January 15, 2024
  • Accepted : January 26, 2024
  • Published : January 31, 2024

Park, Byoung-Ki 1

1호서대학교

Accredited

ABSTRACT

In this study, evaluated the properties of layered silicate-based nanocomposite sensitive film. For the fabrication of nanocomposite materials, we selected organically modified layered silicate materials, specifically Cloisite® and Bentone®, which were treated with quaternary ammonium salts. The impedance of the humidity sensors containing organically modified montmorillonite/hectorite clay decreased with increasing relative humidity(RH%). In the case of the Cloisite® humidity sensor exhibited slightly better impedance linearity and hysteresis compared to the Bentone® 38 humidity sensor. Additionally the impedance of the sensor with Bentone® 38 addition was the lowest when compared to the Cloisite®-modified sensor. Comparing the Cloisite®-modified sensors individually, we observed different moisture absorption characteristics based on the hydrophilic properties of the organic-treated materials. The response speed of Cloisite® 93A tended to be slower due to differences in moisture evaporation rates influenced by the hydrophilic organic components. Based on these results, moisture barriers utilizing organically modified layered silicate materials may exhibit slightly lower moisture absorption properties compared to conventional polymer-based moisture barriers. However, their excellent stability, simple processing, and cost-effectiveness make them suitable for humidity sensor applications.

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