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Investigations on the existence of piezoelectric property of a bio-polymer – chitosan and its application in vibration sensors

机译：生物聚合物壳聚糖压电性能的研究及其在振动传感器中的应用

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A variety of physical and chemical properties of bio-polymers like chitosan have been investigated although their inherent behavior, such as piezoelectricity, has not been investigated to date. In this study, an attempt has been made to investigate the presence of non-centrosymmetry in chitosan through X-ray diffraction (XRD) analysis and second harmonic generation (SHG) experiment. Existence of piezoelectricity is established by determining d33 coefficient for various pressures. With the help of the above mentioned results, a new application of the bio-polymer chitosan as a piezoelectric element in vibration sensors has been analyzed. To fabricate vibration sensor elements, chitosan was dissolved in various organic acids and its suitability for these applications was studied. Through isolation resistance measurement, the fabricated sensor is found to exhibit very high isolation, which is suitable even in hazardous environments. All the abovementioned investigations reveal the suitability of using chitosan in vibration sensors.
机译：尽管迄今为止尚未对诸如壳聚糖之类的生物聚合物的固有行为（例如压电性）进行研究，但已研究了其多种物理和化学性质。在这项研究中，已尝试通过X射线衍射（XRD）分析和二次谐波生成（SHG）实验来研究壳聚糖中非中心对称性的存在。通过确定各种压力下的 d 33 系数来确定压电性的存在。借助于上述结果，已经分析了生物聚合物壳聚糖作为压电元件在振动传感器中的新应用。为了制造振动传感器元件，将壳聚糖溶解在各种有机酸中，并研究了其在这些应用中的适用性。通过隔离电阻测量，发现制成的传感器具有很高的隔离度，即使在危险环境中也适用。所有上述研究揭示了在振动传感器中使用壳聚糖的适用性。

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