The excellent mechanical and piezoelectric properties of poly(vinylidene fluoride) (PVDF) are its most valuable characteristics, and improving the piezoelectric performance of PVDF is an important subject of the study. However, several existing methodological studies have been regarded as complex and ineffective. The most efficient method to produce PVDF nanofibers with high β-phase contents is still electrospinning; however, this process does not facilitate the mass production of PVDF nanofibers and produces PVDF with a relatively low fraction of β-phase. Both these issues can be solved by solution blow spinning (SBS). This work focused on the optimum ratio of solvents to produce beadless PVDF nanofibers and highlighted the relationship between the spinning solution viscosity and the average diameter of the SBS nanofibers obtained. Using Fourier transform infrared reflection, it was evaluated that the fraction of the β-phase increased after the SBS process, which was calculated to be 85%; this value was considered as a relatively high fraction of β-phase, which was similar to that obtained by electrospinning. Consequently, a simple and convenient alternative to produce PVDF nanofibers with high β-phase contents was achieved.

中文翻译：

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使用溶液吹塑法制备具有高 β 相的聚偏二氟乙烯纳米纤维的混合溶剂方法

聚偏二氟乙烯（PVDF）优异的机械和压电性能是其最有价值的特性，提高PVDF的压电性能是该研究的重要课题。然而，一些现有的方法学研究被认为是复杂和无效的。生产具有高 β 相含量的 PVDF 纳米纤维的最有效方法仍然是静电纺丝；然而，该过程不利于 PVDF 纳米纤维的大规模生产，并且生产的 PVDF 的 β 相含量相对较低。这两个问题都可以通过溶液吹塑 (SBS) 解决。这项工作的重点是生产无珠 PVDF 纳米纤维的最佳溶剂比例，并强调了纺丝溶液粘度与所获得 SBS 纳米纤维的平均直径之间的关系。使用傅里叶变换红外反射，评估了SBS过程后β相的分数增加，计算为85％；该值被认为是 β 相的一个相对较高的分数，这类似于通过静电纺丝获得的值。因此，实现了一种简单方便的替代方法来生产具有高β相含量的 PVDF 纳米纤维。