电介质
材料科学
复合材料
介电损耗
聚二甲基硅氧烷
聚苯胺
电场
复合数
介电弹性体
介电常数
高-κ电介质
耗散因子
聚合物
聚合
光电子学
物理
量子力学
作者
Huaixiao Wei,Yuan Yuan,Tianli Ren,Lijuan Zhou,Xueqing Liu,Haroon A. M. Saeed,Pingliang Jin,Yuwei Chen
出处
期刊:Polymers
[MDPI AG]
日期:2022-10-17
卷期号:14 (20): 4381-4381
被引量:6
标识
DOI:10.3390/polym14204381
摘要
Polymer-based composite films with multiple properties, such as low dielectric loss tangent, high dielectric constant, and low cost are promising materials in the area of electronics and electric industries. In this study, flexible dielectric films were fabricated via an electric field-assisted method. Polyaniline (PANI) was modified by polyvinylpyrrolidone (PVP) to form a core-shell structure to serve as functional particles and silicone rubber polydimethylsiloxane (PDMS) served as the matrix. The dielectric constant of the composites prepared under electric fields was improved by the micro-structures formed by external electric fields. With the addition of 2.5 wt% PVP@PANI, the dielectric constant could be significantly enhanced, up to 23; the dielectric loss tangent is only 1, which is lower than that of the aligned PANI samples. This new processing technology provides important insights for aligning fillers in polymer matrix to form composites with enhanced dielectric properties.
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