Solodilov Vitaliy, Kochervinskii Valentin, Osipkov Alexey, Makeev Mstislav, Maltsev Aleksandr, Yurkov Gleb, Lokshin Boris, Bedin Sergey, Shapetina Maria, Tretyakov Ilya, Petrova Tuyara
Laboratory of Ferroelectric Polymers, Bauman Moscow State Technical University, 105005 Moscow, Russia.
Department of Electronics of Organic Materials and Nanostructures, N.M. Emanuel Institute of Biochemical Physics (IBCP), Russian Academy of Science (RAS), 119334 Moscow, Russia.
Polymers (Basel). 2023 Mar 16;15(6):1483. doi: 10.3390/polym15061483.
This paper is devoted to the study of the structure and thermomechanical properties of PVDF-based ferroelectric polymer film. Transparent electrically conductive ITO coatings are applied to both sides of such a film. In this case, such material acquires additional functional properties due to piezoelectric and pyroelectric effects, forming, in fact, a full-fledged flexible transparent device, which, for example, will emit a sound when an acoustic signal is applied, and under various external influences can generate an electrical signal. The use of such structures is associated with the influence of various external influences on them: thermomechanical loads associated with mechanical deformations and temperature effects during operation, or when applying conductive layers to the film. The article presents structure investigation and its change during high-temperature annealing using IR spectroscopy and comparative results of testing a PVDF film before and after deposition of ITO layers for uniaxial stretching, its dynamic mechanical analysis, DSC, as well as measurements of the transparency and piezoelectric properties of such structure. It is shown that the temperature-time mode of deposition of ITO layers has little effect on the thermal and mechanical properties of PVDF films, taking into account their work in the elastic region, slightly reducing the piezoelectric properties. At the same time, the possibility of chemical interactions at the polymer-ITO interface is shown.
本文致力于研究聚偏氟乙烯基铁电聚合物薄膜的结构和热机械性能。在这种薄膜的两面都涂覆了透明导电氧化铟锡（ITO）涂层。在这种情况下，由于压电和热释电效应，这种材料获得了额外的功能特性，实际上形成了一种成熟的柔性透明器件，例如，当施加声学信号时它会发出声音，并且在各种外部影响下可以产生电信号。这种结构的使用与各种外部影响对它们的作用有关：与操作过程中的机械变形和温度效应相关的热机械载荷，或者在薄膜上施加导电层时的热机械载荷。本文介绍了使用红外光谱对结构进行的研究及其在高温退火过程中的变化，以及在ITO层沉积前后对聚偏氟乙烯薄膜进行单轴拉伸测试的对比结果、其动态力学分析、差示扫描量热法（DSC），以及对这种结构的透明度和压电性能的测量。结果表明，考虑到聚偏氟乙烯薄膜在弹性区域的工作情况，ITO层的温度 - 时间沉积模式对其热性能和机械性能影响很小，只是略微降低了压电性能。同时，还展示了聚合物 - ITO界面处发生化学相互作用的可能性。
