![Author ORCID: We display the ORCID iD icon alongside authors names on our website to acknowledge that the ORCiD has been authenticated when entered by the user. To view the users ORCiD record click the icon. [opens in a new tab]](https://chemrxiv.org/engage/assets/public/chemrxiv/images/logos/orcid.png)
Abstract
Vinylidene Fluoride (VDF)-based polymers are renowned for their remarkable electroactive properties, including piezoelectric, pyroelectric, and ferroelectric features. These properties make them highly sought-after in a wide range of applications, such as sensors and energy storage. The modulation of their dielectric characteristics is intricately linked to the crystalline polymorphism, which is contingent upon specific processing conditions. Herein, we delve into the potential for enhancing these dielectric functionalities through modifications of the processing conditions (i.e., solvent casting and evaporation rate). Our findings demonstrate that superior structural characteristics and enhanced dielectric properties are achieved when casting from highly polar solvents followed by vacuum annealing. This simple and efficient method, eliminates the need for extensive processing and excessive energy consumption and it holds promise for streamlining industrial processing on a larger scale by reducing duration, energy, and complexity.
Supplementary materials
Title
Supporting Information
Description
All experimental details are included, with the description of the materials used, the methods for film and device fabrication, as well as detailed procedures and lists of the instruments and characterization techniques used to obtain the results presented here. Also included are the evaporation rate study of the solvent under atmospheric pressure or under vacuum (Fig. S1), the WAXS pattern of the aluminum paper used to enroll the P(VDF-co-TrFE) films measured in in-situ conditions (Fig. S2), interplanar distances of P(VDF-ter-TrFE-ter-CTFE) terpolymer, as function of the annealing conditions (under atmospheric pressure or under vacuum (Fig. S3), WAXS patterns of the films cast from TEP or CP annealed under atmospheric pressure or under vacuum (Fig. S4), Interplanar distances of P(VDF-co-TrFE) copolymer, as function of solvent dipole moment (Fig. S5), root-mean square surface roughness of films made under atmospheric pressure or vacuum, from the 4 solvents (Table 1).
Actions
