Mechano-electric coupling in P(VDF–TrFE)/spin crossover composites
Mechano-electric coupling in P(VDF–TrFE)/spin crossover composites
复制标题
P(VDF–TrFE)/自旋交叉复合材料中的机电耦合
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
A. Bousseksou
中科院分区：
文献类型：
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作者：
Mario Piedrahita;Baptiste Martin;L. Salmon;G. Molnár;P. Demont;A. Bousseksou
分散在压电/铁电聚（偏二氟乙烯-共-三氟乙烯），P（VDF-TrFE），矩阵中的自旋交叉粒子引起鼓舞人心的机电现象，具有能量收集和传感的可能应用。将不同化学组成、形貌和浓度的颗粒加载到具有不同TrFE摩尔含量的共聚物中，以研究这些参数对聚合物和自旋交叉材料之间的机电耦合的影响。样品进行了表征元素分析，粉末X射线衍射，拉曼光谱，光学反射率，差示扫描量热法，和电子显微镜，并研究了它们的压电/热释电性能。我们表明，它是可能的，以这样一种方式，可以同时观察到的聚合物的自旋转变和热电响应的压电效应的自旋转变温度的颗粒和居里温度的矩阵。这一结果为开发智能、多功能电活性聚合物复合材料和提高其热电联产输出提供了前景。
Spin crossover particles dispersed in a piezo/ferroelectric poly(vinylidene fluoride-co-trifluoro-ethylene), P(VDF–TrFE), matrix give rise to inspiring mechano-electric phenomena, with possible applications for energy harvesting and sensing. Particles of different chemical compositions, morphologies and concentrations were loaded into copolymers with different TrFE molar contents to investigate the effect of these parameters on the mechano-electric coupling between the polymer and the spin crossover material. The samples were characterized by elemental analysis, powder X-ray diffraction, Raman spectroscopy, optical reflectivity, differential scanning calorimetry, and electron microscopy and were studied also for their piezo/pyroelectric properties. We show that it is possible to tune simultaneously the spin transition temperature of the particles and the Curie temperature of the matrix in such a way that the piezoelectric effect from the spin transition and the pyroelectric response of the polymer can be concomitantly observed. This result provides prospects for the development of smart, multifunctional electroactive polymer composites and for increasing their thermal–electrical harvester output.