Enhancement of β‐Phase Crystalline Structure and Piezoelectric Properties of Flexible PVDF/Ionic Liquid Surfactant Composite Nanofibers for Potential Application in Sensing and Self‐Powering,Macromolecular Materials and Engineering

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Enhancement of β‐Phase Crystalline Structure and Piezoelectric Properties of Flexible PVDF/Ionic Liquid Surfactant Composite Nanofibers for Potential Application in Sensing and Self‐Powering
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-02-17 , DOI: 10.1002/mame.201900796
Arezo Mahdavi Varposhti ₁ , Maryam Yousefzadeh ₁ , Elaheh Kowsari ₂ , Masoud Latifi _{1,

3}

Affiliation

Polyvinylidene fluoride (PVDF) is a piezo‐polymer which among its crystalline phases, the β‐phase has been researched for the improvement of piezoelectric properties. In this study, to improve the β‐phase contents and thereby the piezoelectric response of the polymer, the effect of adding self‐synthesized ionic liquid surfactant (ILS) in PVDF nanofibers is studied. This material is added in different weight percentages into the PVDF solution and the nanofibers are produced by electrospinning to prepare active piezoelectric thin layers. SEM, XRD, FTIR, and piezo‐tests are employed for assessing the effect of the ILS on the enhancement of β‐phase in electrospun nanofibers and their piezoelectric performance. The results indicate ≈98.6% β‐phase formation in the sample containing 4 wt% ILS and in comparison with the pure nanofibers, the output voltage and its power density are improved 186.9% and 275%, respectively. Considering the results, it is suggested that the ILS can improve the piezoelectric response of the polymer in the fabricated structure by simple mixing in solution compared to other additives.

中文翻译：

增强PVDF /离子液体表面活性剂复合纳米纤维的β相晶体结构和压电性能，可潜在地用于传感和自供电

聚偏二氟乙烯（PVDF）是一种压电聚合物，其结晶相中的β相已被研究用于改善压电性能。在这项研究中，为了提高β相含量，从而改善聚合物的压电响应，研究了在PVDF纳米纤维中添加自合成离子液体表面活性剂（ILS）的效果。将该材料以不同的重量百分比添加到PVDF溶液中，并通过电纺丝制备纳米纤维以制备活性压电薄层。SEM，XRD，FTIR和压电测试用于评估ILS对电纺纳米纤维中β相增强及其压电性能的影响。结果表明，在包含4 wt％ILS的样品中，β-相的形成约为98.6％，与纯纳米纤维相比，输出电压及其功率密度分别提高了186.9％和275％。考虑到结果，建议与其他添加剂相比，通过在溶液中简单混合，ILS可以改善制造结构中聚合物的压电响应。

更新日期：2020-03-12

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