Flexible thin films with enhanced switchable dielectric property by incorporating single-protonated 1,4-diazabicyclo[2.2.2]octane perrhenate into β-phase dominated PVDF

Abstract

A layered structure of grain-oriented flexible composite film is designed and prepared by incorporating polar and switchable dielectric single-protonated 1,4-diazabicyclo[2.2.2]octane perrhenate (DabcoHReO₄) into β-phase dominated PVDF matrix. Utilizing the induced orientation effect at the interface between β-phase PVDF and polar guest, DabcoHReO₄ could be orientedly arranged in composite film. Our study found that β-phase dominated PVDF composite film with 40% of salt content could exhibit larger dielectric change between high and low dielectric states than that of pure DabcoHReO₄ at phase transition temperature.

KEYWORDS:

• Single-protonated 1,4-diazabicyclo[2.2.2]octane perrhenate
• poly(vinylidene fluoride)
• composite film
• switchable dielectric property

Additional information

Funding

This work was supported by National Natural Science Foundation of China (21661016, 21361012 and 21461013), Young Scientist Program of Jiangxi Province (20144BCB23038), Science and Technology Research Project of Jiangxi Provincial Department of Education (GJJ160734), Key Program of Scientific Research of Jinggangshan University (JFD1801) and Undergraduate Training Programs for Innovation and Entrepreneurship (201810419003).