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Flexible piezoelectric cum‐electromagnetic‐absorbing multifunctional nanocomposites based on electrospun poly (vinylidene fluoride) incorporated with synthesized porous core‐shell nanoparticles
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-07-03 , DOI: 10.1002/er.5623 Ali Samadi 1 , Saman Pourahmad 2
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-07-03 , DOI: 10.1002/er.5623 Ali Samadi 1 , Saman Pourahmad 2
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Flexibility, protection against harmful electromagnetic (EM) waves, and mimicking movement patterns of human beings are among the most required features of advanced textiles. In this regard, the present study was conducted to investigate the possibility of producing flexible, piezoelectric, and EM‐sensitive multifunctional nanofibers. Porous core‐shell Fe3O4@MnO2 Nanoparticles (NPs) were synthesized and dispersed in poly (vinylidene fluoride) through solution mixing methods in different concentrations. Then, nanofibers were prepared by the electrospinning technique. Extensive characterizations including morphological, structural, piezoelectric response, and EM wave absorbance tests were performed on both synthesized NPs and electrospun mats. The effects of filler content, piezoelectric dimension, and test dynamic condition on the output voltage of the piezoelectric generator were also assessed. FTIR and XRD investigations respectively showed that the β phase content increased up to 10% and 7% in presence of 4% NPs that led to an increase of up to 105% in piezoelectric response (up to 23.5 V). Output voltages increased linearly with slopes of 2.83, 1.92, 0.55, 0.306, and 0.086 by increasing the NP content, frequency, piezoelectric area, force, and thickness, respectively. The results of the study indicated that produced nanofibers can absorb significant EM waves in addition to showing high piezoelectric response.
中文翻译：
基于静电纺丝聚偏二氟乙烯的柔性压电兼电磁吸收多功能纳米复合材料，并结合有合成的多孔核-壳纳米粒子
柔韧性，防止有害电磁波（EM）以及模仿人类的运动模式是高级纺织品最需要的功能之一。在这方面，本研究旨在研究生产柔性，压电和EM敏感的多功能纳米纤维的可能性。多孔核壳Fe 3 O 4 @MnO 2通过溶液混合方法以不同的浓度合成了纳米颗粒（NPs），并将其分散在聚偏二氟乙烯中。然后，通过静电纺丝技术制备纳米纤维。对合成的NP和电纺垫均进行了广泛的表征，包括形态，结构，压电响应和EM波吸收测试。还评估了填料含量，压电尺寸和测试动态条件对压电发电机输出电压的影响。FTIR和XRD研究分别表明，在4％NP存在的情况下，β相含量最多增加10％和7％，从而导致压电响应最多增加105％（最多23.5 V）。通过增加NP含量，输出电压以2.83、1.92、0.55、0.306和0.086的斜率线性增加，频率，压电面积，力和厚度。研究结果表明，制成的纳米纤维除了显示出高压电响应外，还可以吸收大量的EM波。
更新日期：2020-07-03
中文翻译：
基于静电纺丝聚偏二氟乙烯的柔性压电兼电磁吸收多功能纳米复合材料，并结合有合成的多孔核-壳纳米粒子
柔韧性，防止有害电磁波（EM）以及模仿人类的运动模式是高级纺织品最需要的功能之一。在这方面，本研究旨在研究生产柔性，压电和EM敏感的多功能纳米纤维的可能性。多孔核壳Fe 3 O 4 @MnO 2通过溶液混合方法以不同的浓度合成了纳米颗粒（NPs），并将其分散在聚偏二氟乙烯中。然后，通过静电纺丝技术制备纳米纤维。对合成的NP和电纺垫均进行了广泛的表征，包括形态，结构，压电响应和EM波吸收测试。还评估了填料含量，压电尺寸和测试动态条件对压电发电机输出电压的影响。FTIR和XRD研究分别表明，在4％NP存在的情况下，β相含量最多增加10％和7％，从而导致压电响应最多增加105％（最多23.5 V）。通过增加NP含量，输出电压以2.83、1.92、0.55、0.306和0.086的斜率线性增加，频率，压电面积，力和厚度。研究结果表明，制成的纳米纤维除了显示出高压电响应外，还可以吸收大量的EM波。
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