Keywords: Polyvinylidene Fluoride (PVDF) , pizeo-film, sensor, solution cast method.
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哈尔滨工业大学工学硕士学位论文
目
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摘 要 ......................................................................................................................... I Abstract ................................................................................................................... II 第 1 章 绪 论 ........................................................................................................ 1 1.1 课题背景 ........................................................................................................ 1 1.2 PVDF压电薄膜概述 ....................................................................................... 1 1.2.1 压电材料和压电效应 .............................................................................. 2 1.2.2 PVDF的晶体结构 .................................................................................... 3 1.3 PVDF压电薄膜的研究现状 ............................................................................ 5 1.3.1 PVDF薄膜的制备及性能研究 ....................................................................................................................................... 6 1.4 已有的研究中存在的问题 ............................................................................. 9 1.5 论文主要工作内容 ........................................................................................ 9 第 2 章 PVDF压电薄膜的制备 ............................................................................ 10 2.1 引言 .............................................................................................................. 10 2.2 实验材料及设备 .......................................................................................... 10 2.3 PVDF薄膜的流延制备 ................................................................................. 11 2.3.1 制备过程 ............................................................................................... 11 2.3.2 制备影响因素 ....................................................................................... 12 2.4 PVDF薄膜的拉伸 ......................................................................................... 14 2.4.1 拉伸过程 ............................................................................................... 14 2.4.2 拉伸影响因素 ....................................................................................... 14 2.5 PVDF薄膜的极化 ......................................................................................... 18 2.5.1 极化原理 ............................................................................................... 18 2.5.2 热极化法步骤 ....................................................................................... 20 2.5.3 热极化法影响因素 ................................................................................ 21 2.6 PVDF薄膜的表征 ......................................................................................... 25 2.6.1 扫描电子显微镜（ SEM） .................................................................... 25 2.6.2 差示扫描量热法（ DSC） .................................................................... 27 2.6.3 广角 X-射线衍射测试（ XRD） ........................................................... 29 2.6.4 压电性能测试 ....................................................................................... 30 2.6.5 介电性能测试 ....................................................................................... 31 2.7 本章小结 ...................................................................................................... 32
硕士学位论文
PVDF 压电薄膜及其传感器的制备 与性能研究
PREPARATION AND PERFORMANCE STUDY OF PVDF PIEZOELECTRIC FILM AND SENSOR
朱金海
哈尔滨工业大学 2011 年 6 月
国内图书分类号： TB381 国际图书分类号：
学校代码： 10213 密级：公开
Candidate： Supervisor： Academic Degree Applied for： Speciality： Unit： Date of Defence： University：
Zhu Jinhai Prof. Guan Xinchun Master of Engineering Disaster Prevention and Mitigation Engineering School of Civil Engineering June, 30th, 2011 Harbin Institute of Technology
Classified Index: TB381 U.D.C.:
Dissertation for the Master Degree in Engineering
PREPARATION AND PERFORMANCE STUDY OF PVDF PIEZOELECTRIC FILM AND SENSOR
关键词： 聚偏二氟乙烯（PVDF） ；压电薄膜；传感器；溶液流延法。
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哈尔滨工业大学工学硕士学位论文
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.