Effect of Solvents on Thermomechanical Properties and Piezoelectric Beta-phase of PVDF-TrFE Films

2020 IEEE International Conference on Electrical Engineering and Photonics (EExPolytech) Pub Date : 2020-10-15 DOI:10.1109/EExPolytech50912.2020.9243865

A. I. Kuhn, O. Gryshkov, B. Glasmacher

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引用次数: 3

Abstract

Co-polymer polyvinylidene fluoride-co-trifluoroethylene (PVDF-TrFE) is a promising piezoelectric material for a range of medical and industrial applications such as tissue engineering, sensors and membrane technics. In this regard, blend electrospinning is an ideal method to produce suitable polymeric nano- and micro-fiber scaffolds or membranes from polymer solutions. Stable electrospinning process is strongly dependent on PVDF-TrFE solution properties. Thus, this study aimed at evaluating the effect of different suitable solvents on physical properties PVDF-TrFE polymer solutions and produced films with different solvent combinations and mixing ratios. The results indicate that solution viscosities range between 5.47 and 37.17 Pa.s. Furthermore, piezoelectric phase fraction and crystallinity of PVDF-TrFE films were characterized using Fourier Transform Infrared Spectroscopy and Differential Scanning Calorimetry, respectively. All films exhibited a piezoelectric polar beta-phase formation. The crystalline beta-phase fraction of the most of the films was higher than the value of the initial material (77%). Results demonstrate the influence of solvent combinations and mixing ratios on melting temperature and crystallinity.

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溶剂对PVDF-TrFE薄膜热力学性能及压电相的影响

共聚物聚偏氟乙烯-共三氟乙烯(PVDF-TrFE)是一种很有前途的压电材料，可用于组织工程、传感器和膜技术等一系列医疗和工业应用。在这方面，共混静电纺丝是一种理想的方法来生产合适的聚合物纳米和微纤维支架或膜的聚合物溶液。静电纺丝过程的稳定性很大程度上取决于PVDF-TrFE溶液的性质。因此，本研究旨在评价不同合适溶剂对PVDF-TrFE聚合物溶液物理性能的影响，并制备不同溶剂组合和混合比例的薄膜。结果表明，溶液粘度范围为5.47 ~ 37.17 Pa.s。利用傅里叶变换红外光谱和差示扫描量热法分别对PVDF-TrFE薄膜的压电相分数和结晶度进行了表征。所有薄膜都表现出压电极性β相的形成。大多数薄膜的晶相分数高于初始材料(77%)。结果表明，溶剂组合和混合比例对熔融温度和结晶度有影响。

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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2020 IEEE International Conference on Electrical Engineering and Photonics (EExPolytech)

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