Polypyrrole-based methanol sensors prepared by chemical and vapor state polymerization

Hee Kwon Jun, Linshu Jiang, Kyung Mun Lee, Yong Su Hoh, Jeong Ok Lim, Jeung Soo Huh

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations

Abstract

Polypyrrole (PPy) and polypyrrole-poly (vinyl alcohol) (PVA) composite methanol sensors were prepared by chemical and in-situ vapor state polymerization method, respectively, and their chemical structures were identified by a FT-Raman spectroscopy. The sensing behaviors of two-type methanol gas sensors, such as sensitivity, response and recovery time, reproducibility and long-term stability were investigated by using a flow measuring system including mass flow controller (MFC), temperature controllers and bubbling bottle. The sensitivity of the sensors almost linearly increased with the increase of methanol concentration from 87ppm to 1059ppm. The sensitivity of vapor state polymerized PPy/PVA composite sensor was higher than that of chemically polymerized PPy sensor, while the response and recovery time and long-term stability were worse.

Original languageEnglish
Pages (from-to)326-330
Number of pages5
JournalMaterials Science Forum
Volume439
DOIs
StatePublished - 2003
EventEco - Materials Processing and Design - Gyungpodae, Korea, Republic of
Duration: 4 Feb 20036 Feb 2003

Keywords

  • Chemical and vapor state polymerization
  • Methanol sensor
  • Polypyrrole

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