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首页> 外文期刊>RSC Advances >Effect of electrospinning parameters and polymer concentrations on mechanical-to-electrical energy conversion of randomly-oriented electrospun poly(vinylidene fluoride) nanofiber mats
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Effect of electrospinning parameters and polymer concentrations on mechanical-to-electrical energy conversion of randomly-oriented electrospun poly(vinylidene fluoride) nanofiber mats

机译：电纺参数和聚合物浓度对随机取向的电纺聚偏二氟乙烯纳米纤维毡的机械-电能转换的影响

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摘要

Poly(vinylidene fluoride) (PVDF) nanofiber mats prepared by an electrospinning technique were used as an active layer for making mechanical-to-electric energy conversion devices. The effects of PVDF concentration and electrospinning parameters (e.g. applied voltage, spinning distance), as well as nanofiber mat thickness on the fiber diameter, PVDF beta crystal phase content, and mechanical-to-electrical energy conversion properties of the electrospun PVDF nanofiber mats were examined. It was interesting to find that finer uniform PVDF fibers showed higher beta crystal phase content and hence, the energy harvesting devices had higher electrical outputs, regardless of changing the electrospinning parameters and PVDF concentration. The voltage output always changed in the same trend to the change of current output whatever the change trend was caused by the operating parameters or polymer concentration. Both voltage and current output changes followed a similar trend to the change of the beta crystal phase content in the nanofibers. The nanofiber mat thickness influenced the device electrical output, and the maximum output was found on the 70 mu m thick nanofiber mat. These results suggest that uniform PVDF nanofibers with smaller diameters and high beta crystal phase content facilitate mechanical-to-electric energy conversion. The understanding obtained from this study may benefit the development of novel piezoelectric nanofibrous materials and devices for various energy uses.
机译：通过静电纺丝技术制备的聚偏二氟乙烯（PVDF）纳米纤维毡被用作制造机械到电能转换装置的活性层。 PVDF浓度和电纺丝参数（例如施加的电压，纺丝距离）以及纳米纤维垫厚度对电纺PVDF纳米纤维垫的纤维直径，PVDFβ晶相含量和机械-电能转换性能的影响为检查。有趣的是，更细的均匀PVDF纤维显示出更高的β晶相含量，因此，无论电纺丝参数和PVDF浓度如何变化，能量收集装置都具有更高的电输出。电压输出始终以与电流输出相同的趋势变化，而不管操作参数或聚合物浓度引起的变化趋势如何。电压和电流输出变化都遵循与纳米纤维中β晶体相含量变化相似的趋势。纳米纤维垫的厚度影响器件的电输出，在70微米厚的纳米纤维垫上发现最大输出。这些结果表明，具有较小直径和高β晶相含量的均匀PVDF纳米纤维可促进机械到电能的转换。从这项研究中获得的理解可能有益于开发用于各种能源用途的新型压电纳米纤维材料和装置。

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