Effect of Annealing on Crystalline Phase and Piezoelectric Properties of PVDF/[BuPy]PF₆ Composites.

IF 3.3 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemistry - An Asian Journal Pub Date : 2025-06-13 DOI:10.1002/asia.202500571

Kun Liu, Yisha Ma, Qianqian Yu, Muhua Yuan, Litao Tang

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引用次数: 0

Abstract

In this work, the effect of N-Butylpyridinium hexafluorophosphate ([BuPy]PF₆) on the crystalline phase and phase transition of poly(vinylidene fluoride) (PVDF) was investigated in detail. The results show that [BuPy]PF₆ can induce the crystallization of β-PVDF crystals from the melt. With an increase in [BuPy]PF₆ content from 0% to 20%, the content of β-PVDF crystals rises from 16.7% to 65.6%. Taking the composites containing 4% and 20% [BuPy]PF₆ as examples, the in situ annealing process at 160 °C were tracked with the application of FT-IR spectra. It has been confirmed that the annealing process leads to a polar phase transition from α to γ, particularly evident in samples with a 4% [BuPy]PF₆ content, where the polar phase content rises from 48.1% to 61.4%. Furthermore, the α→γ phase transition improves the piezoelectric properties of PVDF films. After annealing, the piezoelectric coefficient d₃₃ of samples with a 4% [BuPy]PF₆ content increases from 4.2 to 5.5 pm/V.

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退火对PVDF/[BuPy]PF6复合材料晶相及压电性能的影响

本文研究了六氟磷酸n -丁基吡啶（[BuPy]PF6）对聚偏氟乙烯（PVDF）结晶相和相变的影响。结果表明，[BuPy]PF6能诱导熔体中β-PVDF结晶。随着[BuPy]PF6含量从0%增加到20%，β-PVDF晶体含量从16.7%增加到65.6%。以含4%和20% [BuPy]PF6的复合材料为例，利用FT-IR光谱对其在160℃下的原位退火过程进行了跟踪。结果表明，退火过程导致了从α到γ的极性相转变，在[BuPy]PF6含量为4%的样品中尤为明显，其极性相含量从48.1%上升到61.4%。此外，α→γ相变改善了PVDF薄膜的压电性能。退火后，[BuPy]PF6含量为4%的样品的压电系数d33从4.2 pm/V增加到5.5 pm/V。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemistry - An Asian Journal 化学-化学综合

CiteScore

7.00

自引率

2.40%

发文量

535

审稿时长

1.3 months

期刊介绍： Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics. Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews. A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal. Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).