[1]邱建华,丁建宁,袁宁一,等.外部应力对P(VDF-TrFE)聚合物电热效应的影响[J].常州大学学报(自然科学版),2015,(03):75-79.[doi:10.3969/j.issn.2095-0411.2015.03.015]
　QIU Jianhua,DING Jianning,YUAN Ningyi,et al.Influence of External Stress on the Electrocaloric Effect of P(VDF-TrFE) Copolymers[J].Journal of Changzhou University(Natural Science Edition),2015,(03):75-79.[doi:10.3969/j.issn.2095-0411.2015.03.015]
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外部应力对P(VDF-TrFE)聚合物电热效应的影响()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2015年03期
页码:
75-79
栏目:
数理科学
出版日期:
2015-07-25

文章信息/Info

Title:
Influence of External Stress on the Electrocaloric Effect of P(VDF-TrFE) Copolymers
作者:
邱建华1; 丁建宁2; 袁宁一2; 王秀琴1
1. 常州大学 数理学院，江苏 常州 213164；2. 常州大学 材料科学与工程学院，江苏 常州 213164
Author(s):
QIU Jianhua1;  DING Jianning2;  YUAN Ningyi2;  WANG Xiuqin1
1.School of Mathematics and Physics, Changzhou University, Changzhou 213164, China;2.School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China
关键词:
聚合物; 电热效应; 应力
Keywords:
polymer;  electrocaloric effect;  stress
分类号:
O 792
DOI:
10.3969/j.issn.2095-0411.2015.03.015
文献标志码:
A
摘要:
一个唯象的朗道·德文希尔理论被用来研究外部应力对P(VDF-TrFE)聚合物电热效应的影响。P(VDF-TrFE) (55/45)体材料和P(VDF-TrFE) (70/30)薄膜材料的电热效应极大地依赖于外部应力。外部应力和失配应变并不改变电热系数的最大值，但会减小电热系数最大值所对应的温度。对于P(VDF-TrFE) (55/45)体材料，张应力减小绝热温度改变值，并且最大的室温绝热温度改变发生在应力为180兆帕时。对于P(VDF-TrFE) (70/30)薄膜，张应力或压失配应变减小其绝热温度改变。而且，张应力和压应变同时作用可以导致大的室温绝热温度改变，这能为实际的制冷应用提供潜在的应用前景。
Abstract:
A phenomenological Landau-Devonshire theory is used to investigate the effect of external stress on the electrocaloric effect of P(VDF-TrFE) copolymers. The electrocaloric effects of P(VDF-TrFE) (55/45) bulk and P(VDF-TrFE) (70/30) thin films greatly depend on the external stress. The external stress or misfit strain does not change the maximum of the electrocaloric coefficient, but decreases the working temperature where the electrocaloric coefficient is maximized. For P(VDF-TrFE) (55/45) bulk, the tensile stress reduces the adiabatic temperature change and the giant room temperature adiabatic temperature change can be achieved at σ3=180 MPa. For P(VDF-TrFE) (70/30) thin films, the tensile stress or compressive misfit strain decreases the adiabatic temperature change. Moreover, the tensile stress together with the compressive misfit strain can result in the giant room temperature adiabatic temperature change which can not be achieved only by the misfit strain. It may provide the potential applications in refrigeration devices.

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更新日期/Last Update: 2015-11-26