High β-phase Poly(vinylidene fluoride) Using a Thermally Decomposable Molecular Splint

被引：24

作者：

Choi, Jinwoo ^{[1
]}

Lee, Kyuho ^{[2
]}

Lee, Minhwan ^{[3
,4
]}

Kim, Taebin ^{[2
]}

Eom, Sangwon ^{[1
]}

Sim, Jae Hyun ^{[5
]}

Lee, Won Bo ^{[3
,4
]}

Kim, YongJoo ^{[6
]}

Park, Cheolmin ^{[2
]}

Kang, Youngjong ^{[1
,7
]}

机构：

[1] Hanyang Univ, Dept Chem, Seoul 04763, South Korea

[2] Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea

[3] Seoul Natl Univ, Sch Chem & Biol Engn, 1 Gwanak Ro, Seoul 08826, South Korea

[4] Seoul Natl Univ, Inst Chem Proc, 1 Gwanak Ro, Seoul 08826, South Korea

[5] Hanyang Univ, Res Inst Convergence Basic Sci, Seoul 04763, South Korea

[6] Kookmin Univ, Sch Adv Mat Engn, Seoul 02707, South Korea

[7] Hanyang Univ, Inst Nano Sci & Technol, Res Inst Nat Sci, Seoul 04763, South Korea

来源：

ADVANCED ELECTRONIC MATERIALS | 2023年 / 9卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

high beta-phase; molecular splint; non-covalent interactions; PVDF; thermal decomposition; PVDF; NANOTUBES; POLYMORPH; ENERGY; ALPHA;

D O I：

10.1002/aelm.202200279

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页数：10

共 40 条

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