驻极体模板作用下极化聚合物薄膜材料的静电自组装

论文编号:HG143  论文字数:13631,页数:31

摘 要：极化聚合物，也称分子偶极聚合物驻极体，是将极性生色团分子通过掺杂或化学键合的方式链接到聚合物材料中去，在外电场作用下，使极性生色团分子沿电场方向取向并被冻结下来而形成的一类新型非线性光学材料。本论文采用栅控电晕驻极、等温表面电位衰减和压电系数d33测量等方法，研究了膜厚、驻极温度和老化条件对PTFE膜电荷稳定性的影响；并以经100℃驻极未老化的90μm厚度PTFE膜为带静电基底实现主客体掺杂DR1/PMMA膜的静电自组装，讨论了膜厚、掺杂浓度、制备方法对主客体掺杂DR1/PMMA膜的影响。结果表明，由1.5ml的成膜液制得的掺杂浓度为5%的主客体掺杂DR1/PMMA膜电荷储存稳定性最佳；掺杂浓度为5%、0.5ml的成膜液制得的主客体掺杂DR1/PMMA膜压电系数最大，达到25pC/N。

关键词：极化聚合物；静电自组装；驻极体；表面电位；电荷稳定性

Abstract: Amorphous polymers containing preferential orientational molecular chromophore dipoles doped or chemically attachment to polymer macromolecules are a class of new molecular nonlinear optical materials, which also called molecular dipole polymer electret. In present paper，the effect of the thickness，aging condition and charging temperature on the charge stability of PTFE films are researched by means of corona charging, isothermal surface-potential and piezoelectricity modulus measurement etc. The electrostatic self-assembly of the host-quest type DR1/PMMA films on PTFE films which charging condition is 100℃,the thickness is 90μm. The effect of the thickness,doped concentration and preparation methods on the charge stability of the host-quest type DR1/PMMA films are discussed. The result shows that the charge stability of the film is the best which was prepared by the host-quest type DR1/PMMA solution in which doped concentration is 5% and volume is 1.5ml; piezoelectricity modulus is the highest which was prepared by the host-quest type DR1/PMMA solution in which doped concentration is 5% and volume is 0.5ml, reach to 25pC/N.

Keywords：Poled polymer; Electrostatic self-assembly; Electret; Surface potential; Charge stability

目  录
中文摘要 I
英文摘要 II
目录 III
1. 绪论 1
 1.1  引言 1
 1.2  已研制的极化聚合物材料及研究现状 2
 1.3  静电自组装薄膜技术 3
 1.4  驻极体材料的选择及极化方法 5
 1.5  选题背景与目的 6
 1.6  本章小结 7
2. 实验部分 8
 2.1  实验材料与仪器 8
 2.2  极化聚合物材料的选取 8
 2.3  极化聚合物薄膜的制备工艺 8
     2.4  表面电位的测量 9
     2.5  准静态压电系数的测量 10
     2.6  紫外-可见吸收光谱的测量 10
 2.7  本章小结 11
3. 结果与讨论 12
 3.1  驻极体基膜的制备及电荷稳定性 12
     3.2  制备主客体掺杂DR1/PMMA膜基底PTFE膜的表面电位 15
     3.3  主客体掺杂DR1/PMMA膜电荷稳定性 15
     3.4  主客体掺杂DR1/PMMA膜的压电性 18
     3.5  DR1/PMMA膜UV-VIR光谱 18
 3.6  本章小结 19
4. 总结与展望 21
致谢 22
参考文献 23

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