【作者】 朱金海；

【导师】 关新春；

【作者基本信息】 哈尔滨工业大学 ， 防灾减灾及防护工程， 2011， 硕士

【摘要】 聚偏二氟乙烯(Polyvinylidene Fluoride,简称PVDF)压电薄膜是一种高分子薄膜,因其具有体积小、质量轻、耐化学腐蚀、柔性和加工性能好、声阻抗低、频响宽、介电强度高、稳定性好等特性,以其为核心的产品被广泛的应用于工业生产和日常生活的多个领域,如日常生活的麦克风、显示器,医学方面的心率测试仪,声学方面的超声显微镜、超声发送及接收器等。鉴于易粘贴于结构表面,对结构的力学性能影响小等优点,PVDF在传感方面有着很大的优势,它可作为智能材料与结构中理想的传感元件。基于PVDF压电薄膜的传感器在结构监测方面有着非常广阔的应用前景。本文研究了PVDF压电薄膜的制备工艺、PVDF传感器的封装工艺及其动态响应特性,主要内容如下:(1)研究了PVDF压电薄膜的溶液流延法制备工艺,重点分析和表征了制备过程中流延温度、拉伸比、极化电压等多种因素对薄膜性能的影响,为制备性能良好的压电薄膜奠定了基础。(2)利用磁控溅射、丝网印刷和手涂三种工艺对PVDF压电薄膜进行了电极涂覆并进行了对比,研究了PVDF压电薄膜的封装工艺,完成了PVDF压电传感器的制作。(3)完成了PVDF传感器的动态循环实验研究,验证了电磁屏蔽的必要性,通过与高精度电阻应变片的测试结果的对比研究了PVDF压电传感器的动态响应特性。更多还原

【Abstract】 The Polyvinylidene fluoride(PVDF) pizeo-film is a macromolecule film. Due to its virtues of small size, light weight, high chemical corrosion resistance, flexibility and processability, wide fequency range, high dielectric strength and stability, PVDF is widely applied for industrial and civilian use. It is easily attached to the smart structures as sensing element with little structural influence. The PVDF Sensor has a promising application to the structural health monitoring.In this thesis, the fabrication of PVDF pizeo-film and sensor and the dynamic sensing properties of self-made sensor were investigated. The main contents are detailed as follows:(1) The fabrication of PVDF film, including film deposition by solution cast method, uniaxial stretching and polarization under high temperature, was studied. Various factors impact on the film preparation were analyzed and characterized for better film performance.(2) The electrode coating and packaging process of the PVDF film were investigated, the PVDF sensor fabrication and films assembling differently were explored.(3) Compared with results of the resistance strain gauge, the dynamic response characteristics of PVDF sensor were tested and verified.更多还原