High beta-phase Poly(vinylidene fluoride) Using a Thermally Decomposable Molecular Splintopen access
- Authors
- Choi, Jinwoo; Lee, Kyuho; Lee, Minhwan; Kim, Taebin; Eom, Sangwon; Sim, Jae Hyun; Lee, Won Bo; Kim, YongJoo; Park, Cheolmin; Kang, Youngjong
- Issue Date
- Jan-2023
- Publisher
- WILEY
- Keywords
- high beta-phase; molecular splint; non-covalent interactions; PVDF; thermal decomposition
- Citation
- ADVANCED ELECTRONIC MATERIALS, v.9, no.1, pp.1 - 10
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED ELECTRONIC MATERIALS
- Volume
- 9
- Number
- 1
- Start Page
- 1
- End Page
- 10
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/185797
- DOI
- 10.1002/aelm.202200279
- ISSN
- 2199-160X
- Abstract
- An additive, 1,4-butadiene sulfone (BDS), which generates H2SO3 by in situ thermal retro-Diels-Alder decompositions, is used for preparing high beta-phase polyvinylidene fluoride (PVDF) films. Because of preferential multiple non-covalent interactions of H2SO3 with all-trans configuration of PVDF, beta-phase PVDF is spontaneously induced without mechanical drawing and/or extensive thermal annealing process. PVDF films cast from PVDF/BDS/water solutions exhibit high beta-phase content (f(beta) = 95%) when the BDS concentration is only c(BDS) =1.0 wt%, which is confirmed by polarized optical microscopy (POM), SEM, Fourier transform infrared spectroscopy (FT-IR), differential scan calorimetry (DSC), and 2D grazing incidence wide-angle X-ray scattering (GIWAXS). Because of the high beta-phase content, PVDF films prepared by using BDS exhibit excellent ferroelectric and piezoelectric properties (E-c = 50 MV/m, P-r = 5 mu C/cm(2), and d(33) = approximate to-25 pm/V). Furthermore, a triboelectric nanogenerator (TENG) developed with high beta-phase PVDF film exhibits enhanced performance as 2.5 times higher than neat PVDF film in output charge density, allowing reliable operation of conventional electronic devices.
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