Effect of Varying Solvents on Structural Properties of Annealed PVDF-Trfe Thin Films

  • Authors

    • A. N. Arshad
    • M. N. Sarip
    • M. N. Sarip
    • E. Z. Engku Zaharah
    • M. D. Rozana
    2019-12-24
    https://doi.org/10.14419/ijet.v7i4.14.27713
  • PVDF-TrFE, Hansen Solubility Parameter, ATR-FTIR, XRD, Solvent,
  • PVDF-TrFE (70:30 mol%) powders were dissolved individually in three polar solvents of Diethyl Carbonate (DEC), Methyl Ethyl Ketone (MEK) and N-, N-, Dimethylformamide (DMF). The solution was spin coated and formed PVDF-TrFE films of 250 nm thickness; UN DEC, UN MEK and UN DMF films.  PVDF-TrFE powders were found to readily dissolve in DMF solvent as indicated by Hansen solubility parameters (δt). Hansen parameter showed small difference in reading (δt = 1.7) for PVDF-TrFE and DMF, and low relative energy difference (RED) value. All films were annealed at 120°C (AN DEC, AN MEK, AN DMF). The AN DMF film showed high presence of polar β-phase crystals as evident from the ATR-FTIR spectrum. This is given by the significant peaks at 848, 1190, and 1290 cm-1. The trend is consistent with XRD pattern, where relative increment of cps value (53%) at 19.2° (2θ) is observed. This further supports the high degree of β-phase crystals observed in AN DMF film.

     

     

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    N. Arshad, A., N. Sarip, M., N. Sarip, M., Z. Engku Zaharah, E., & D. Rozana, M. (2019). Effect of Varying Solvents on Structural Properties of Annealed PVDF-Trfe Thin Films. International Journal of Engineering & Technology, 7(4.14), 440-443. https://doi.org/10.14419/ijet.v7i4.14.27713