期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 72, 期 4, 页码 521-527出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2011.12.014
关键词
Carbon nanotubes; Polymer matrix composites (PMCs); Electrical properties; Transmission electron microscopy (TEM); Casting
资金
- National Science Foundation of China [51107081]
- Research Fund for the Doctoral Program of Higher Education [20100073120038]
- National Undergraduate Innovative Test Program (ITP) [PP2067, PP3070]
- Shanghai Leading Academic Discipline Project [B202]
Polymer composites with high permittivity and low dielectric loss are highly desirable in electronic and electrical industry. Adding conductive fillers could significantly increase the permittivity of a polymer. However, polymer composites containing conductive fillers often exhibit very high dielectric loss due to their large electrical conduction or leakage currents. In this work, by engineering TiO2-nanorod-decorated multi-walled carbon nanotubes (TD-CNTs), polystyrene (PS) composite with high permittivity and low dielectric loss have been successfully prepared. The composite containing of 17.2 vol.% TD-CNTs has a permittivity of 37 at 1 kHz, which is 13.7 times higher than that of the pure PS (2.7), while the dielectric loss still remains at a low value below 0.11. The dielectric properties of the composites are closely related to the length of CNTs and the loading level of TiO2-nanorods on the CNT surfaces. (C) 2011 Elsevier Ltd. All rights reserved.
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