Application of self-heating graphene reinforced polyvinyl alcohol nanowires to high-sensitivity humidity detection

Zhao Chi Chen, Tien Li Chang, Kai Wen Su, Hsin Sheng Lee, Jung Chang Wang

研究成果: 雜誌貢獻期刊論文同行評審

摘要

In this study, we measured the performance of self-heating conductive conjugated polyvinyl alcohol, (PVA)/graphene (G) composite nanofibers in the detection of environmental humidity. PVA-G polymer nanocomposite fibers were electrospun together from suspensions of PVA and varying concentrations of pristine G sheets. The extent of graphene dispersion in the nanocomposite fibers were characterized via Raman and transmission electron microscopy (TEM) analysis. Where the main content of C and O elements in composite nanofibers were obtained from the energy dispersive (EDX) spectra and EDX mapping results. Thermal characteristics and structural morphology were then investigated through thermal gravimetric analysis (TGA), and focused ion beam scanning electron microscopy (FIB-SEM) & laser scanning confocal microscopy (LSCM), respectively. Applied voltages (0−10 V) to the PVA-G polymer nanocomposite fibers under varying conditions of humidity were investigated. With increasing concentration of G, increased sensitivity to relative humidity could be observed through the proportional changes in resistance. In addition, at PVA-G concentrations at 6%, the tested humidity sensor remained highly responsive while operating at low temperatures of 60 °C and with minimal power consumption.

原文英語
文章編號128934
期刊Sensors and Actuators, B: Chemical
327
DOIs
出版狀態已發佈 - 2021 一月 15

ASJC Scopus subject areas

  • 電子、光磁材料
  • 儀器
  • 凝聚態物理學
  • 表面、塗料和薄膜
  • 金屬和合金
  • 電氣與電子工程
  • 材料化學

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