Polymers (Dec 2022)

Effects of Co-Solvent-Induced Self-Assembled Graphene-PVDF Composite Film on Piezoelectric Application

  • Januar Widakdo,
  • Wen-Ching Lei,
  • Anawati Anawati,
  • Subrahmanya Thagare Manjunatha,
  • Hannah Faye M. Austria,
  • Owen Setiawan,
  • Tsung-Han Huang,
  • Yu-Hsuan Chiao,
  • Wei-Song Hung,
  • Ming-Hua Ho

DOI
https://doi.org/10.3390/polym15010137
Journal volume & issue
Vol. 15, no. 1
p. 137

Abstract

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A persistent purpose for self-powered and wearable electronic devices is the fabrication of graphene-PVDF piezoelectric nanogenerators with various co-solvents that could provide enhanced levels of durability and stability while generating a higher output. This study resulted in a piezoelectric nanogenerator based on a composite film composed of graphene, and poly (vinylidene fluoride) (PVDF) as a flexible polymer matrix that delivers high performance, flexibility, and cost-effectiveness. By adjusting the co-solvent in the solution, a graphene-PVDF piezoelectric nanogenerator can be created (acetone, THF, water, and EtOH). The solution becomes less viscous and is more diluted the more significant the concentration of co-solvents, such as acetone, THF, and EtOH. Additionally, when the density is low, the thickness will be thinner. The final film thickness for all is ~25 µm. Furthermore, the- crystal phase becomes more apparent when graphene is added and combined with the four co-solvents. Based on the XRD results, the peak changes to the right, which can be inferred to be more dominant with the β-phase. THF is the co-solvent with the highest piezoelectric output among other co-solvents. Most of the output voltages produced are 0.071 V and are more significant than the rest.

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