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首页> 美国卫生研究院文献>Nanomaterials >Vibration Sensing Systems Based on Poly(Vinylidene Fluoride) and Microwave-Assisted Synthesized ZnO Star-Like Particles with Controllable Structural and Physical Properties
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Vibration Sensing Systems Based on Poly(Vinylidene Fluoride) and Microwave-Assisted Synthesized ZnO Star-Like Particles with Controllable Structural and Physical Properties

机译：基于聚（偏二氟乙烯）和微波辅助合成ZnO星状颗粒的振动传感系统具有可控结构和物理性质

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摘要

This study deals with the effect of zinc oxide (ZnO) star-like filler addition to the poly(vinylidene fluoride) (PVDF) matrix, and its effect on the structural and physical properties and consequences to the vibration sensing performance. Microwave-assisted synthesis in open vessel setup was optimized for the preparation of the star-like shape of ZnO crystalline particles. The crystalline and star-like structure was confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDX). Furthermore, the PVDF-based composites were prepared using a spin-coating technique from solution. An investigation of the transformation of the α crystalline phase to the β crystalline phase of the neat PVDF matrix and with various filler concentrations was performed using Fourier-Transform infrared (FTIR) spectroscopy, which shows an enhanced β-phase from 44.1% to 66.4% for neat PVDF and PVDF with 10 wt.% of particles, respectively. Differential scanning calorimetry (DSC) measurements and investigation showed enhanced crystallinity and melting enthalpy of the composite systems in comparison to neat PVDF, since ZnO star-like particles act as nucleating agents. The impact of the filler content on the physical properties, such as thermal and dynamic mechanical properties, which are critical for the intended applications, were investigated as well, and showed that fabricated composites exhibit enhanced thermal stability. Because of its dynamic mechanical properties, the composites can still be utilized as flexible sensors. Finally, the vibration sensing capability was systematically investigated, and it was shown that the addition of ZnO star-like filler enhanced the value of the thickness mode d33 piezoelectric constant from 16.3 pC/N to 29.2 pC/N for neat PVDF and PVDF with 10 wt.% of ZnO star-like particles.
机译：该研究涉及氧化锌（ZnO）星状填料的作用于聚（偏二氟乙烯）（PVDF）基质，及其对结构和物理性质的影响以及对振动感测性能的影响。优化了开放容器设置中的微波辅助合成，用于制备ZnO结晶颗粒的恒星形状。通过X射线衍射（XRD），扫描电子显微镜（SEM）和能量分散光谱（EDX）证实了结晶和星形结构。此外，使用来自溶液的旋涂技术制备PVDF基复合材料。使用傅立叶变换红外（FTIR）光谱进行晶体PVDF基质的β结晶相与各种填料浓度的β结晶相转化的研究，其显示出从44.1％至66.4％的增强的β相对于整洁的PVDF和PVDF，分别为10重量％。颗粒的百分比。差分扫描量热法（DSC）测量和研究表明，与齐颗PVDF相比，复合系统的增强结晶度和熔化焓，因为ZnO星状颗粒充当成核剂。研究了填料含量对物理性质的影响，例如热和动态机械性能，这对于预期应用至关重要，并显示制造的复合材料表现出增强的热稳定性。由于其动态机械性能，复合材料仍然可以用作柔性传感器。最后，系统地研究了振动传感能力，并显示添加ZnO星状填料，增强了厚度模式D33压电常数的值，从16.3 pc / n至29.2 pc / n，用于整洁pvdf和pvdf，有10个Wt。ZnO星状颗粒的％。

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