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Using Annealing Treatment on Fabrication Ionic Liquid-Based PVDF Films

Mechanical Engineering Department, Chung Yuan Christian University, Chung li, Taoyuan 320, Taiwan
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Coatings 2020, 10(1), 44; https://doi.org/10.3390/coatings10010044
Received: 27 November 2019 / Revised: 13 December 2019 / Accepted: 27 December 2019 / Published: 3 January 2020
(This article belongs to the Special Issue Ferroelectric Thin Films and Devices)
In this study, a simple method to obtain pure β-phase directly from the melt process is proposed. A series of PVDF and ionic liquid (IL) was prepared by a solvent casting method with appropriate associated with the subsequent annealing treatment. IL plays a role of filler, which can create strong electrostatic interaction with PVDF matrix and directly induce β-phase crystallization on the PVDF during the melt. PVDF film sample is immersed in hot water for annealing treatment at different temperatures (25 °C to 70 °C). We found that annealing in high temperatures especially can not only increase more IL inserted into the amorphous region of polymer matrix to make more phase transformation, but also accelerate IL removal. Characteristics and performance of the PVDF films were investigated by use of FTIR, XRD, SEM, and AFM. Piezoelectric coefficient d33 as well as d31, degree of crystallinity, and sensitivity are measured in experiment to verify the performance of PVDF film. View Full-Text
Keywords: PVDF thin film; DMF; ionic liquid; solution casting; piezoelectric properties PVDF thin film; DMF; ionic liquid; solution casting; piezoelectric properties
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MDPI and ACS Style

Ting, Y.; Suprapto; Bunekar, N.; Sivasankar, K.; Aldori, Y.R. Using Annealing Treatment on Fabrication Ionic Liquid-Based PVDF Films. Coatings 2020, 10, 44.

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