Enhancement of Both Ionic Conductivity and Permittivity of the High Polymer Film P(EO)n-CuBr2 under Hydrostatic Pressure (Ⅱ)－Application of Method to Add Plasticizer
-
摘要: 选用分子量为500万的聚氧化乙烯和无水溴化铜，通过混溶蒸发法制备出一系列高聚物P(EO)n-CuBr2（n=4，8，12，16，24）薄膜，并在0.1～2443 MPa范围不同的静水压下详细测量了它们的相对介电常数。分别探讨了增塑剂（C4H6O3）含量对室温常压下离子电导率和介电常数的影响，及其对高压下离子电导率和介电常数的影响。实验结果表明：P(EO)16-CuBr2薄膜在添加介电常数较高和本体粘度较低的增塑剂C4H6O3后，当其相对浓度nPC/ntotal=20%时，不仅使该薄膜的室温常压离子电导率明显提高6.8倍，而且使其在高压力下的离子电导率提高1（0.1～100 MPa）至2（350～800 MPa）个数量级，非常有利于在高压环境中应用。Abstract: Through the addition of different weights of non-aqueous CuBr2 to polyethylene oxide (molecular weight 5106), a series of high polymer film P(EO)n-CuBr2 (mole ratio n=[EO]/[Cu]=4, 8, 12, 16, 24) were prepared with the method of mixed solution and evaporation in vacuum. Their relative permittivity was measured in detail under hydrostatic pressure from 0.1 MPa to 2443 MPa. The effect of content of plasticizer (C4H6O3) on both ionic conductivity and permittivity at room temperature and under 1 atmosphere or high pressure were studied respectively. The experimental results show that the film P(EO)n-CuBr2 mingled with plasticizer C4H6O3 which possesses higher permittivity and extremely low intrinsic viscosity when the concentration nPC/ntotal=20%, not only has ionic conductivity at room temperature and under 1 atmosphere enhanced 6.8 times, but also has ionic conductivity under high pressure enhanced from one order of magnitude (under 0.1~100 MPa) to two orders of magnitude (under 250~800 MPa). The enhancement contributes greatly to the application of the film in high pressure state.
-
SU Xiao, DAI Wei-ping, SU Fang. Enhancement of Both Ionic Conductivity and Permittivity of the High Polymer Film P(EO)n-CuBr2 under Hydrostatic Pressure (I)-Discovery of Pressure Effects of Three Different Phases [J]. Chinese Journal of High Pressure Physics, 2001, 15(1): 12-23. Xia Duo-wei, Zhang Zhao-xi. The Role anc! Effect of Addictive in Polymer Electrolytes [A]. Digests of the 6th National Conference on Solid State Ionics [C]. Fuzhou, China, 1992: 138-141. (in Chinese) Xu J. Handbook of Mechanical Design [M]. Beijing: Mechanical Industry Press, 1991: 4-55. Fan tian xiu yi. Handbook of Usual Parameter on Physics [M]. Beijing: Science Press, 1979: 77. He Man-jun, Cheng Wei-xiao, Dong Xi-xia. Physics of High Polymer (2nd ed) [M]. Shanghai: Fudan University Press, 1991: 256, 258. -
点击查看大图
计量
- 文章访问数: 8236
- HTML全文浏览量: 322
- PDF下载量: 867
下载:
