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Proceedings Paper

Dielectric property of all-organic composite film composed of cobalt phthalocyanine and poly(vinylidene fluoride)
Author(s): Li Yu; Yihe Zhang; Wangshu Tong; Jiwu Shang; Fengzhu Lv; Shanming Ke; Haitao Huang
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Paper Abstract

Due to the mechanical flexibility, tunable properties and easy processing, polymer based composites, especially the electroactive polymer composites based on the poly(vinylidene fluoride), which can be applied in the sensors, transistors and the capacitors, have been widely investigated. In this paper, all-organic composite films composed of cobalt phthalocyanine and poly(vinylidene fluoride) with high dielectric permittivity are simply synthesized by solution casting on the glass. The dielectric property over the broad frequency from 1Hz to 107Hz is investigated. The high dielectric permittivity 86.4(102Hz), about 9 times of the pure poly(vinylidene fluoride), is achieved when the fraction of the cobalt phthalocyanine is 20wt% that is similar to other semiconductors reinforced polymer composites. The significant increase of the dielectric constant and the dielectric loss tangent can be explained by the threshold theory. The origin of dramatically enhancement of dielectric permittivity and dielectric loss tangent over the low frequency is the Maxwell-Wagner-Sillars polarization. The results show that the dielectric property is very sensitive to the fraction of cobalt phthalocyanine. Additionally, when the fraction of the cobalt phthalocyanine was 10wt%, the dielectric permittivity and the conductivity of composite films are 17.1 and 1.1×10-6s/cm respectively which indicated that it is potentially applied in the capacitors.

Paper Details

Date Published: 13 April 2012
PDF: 7 pages
Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 84092L (13 April 2012); doi: 10.1117/12.922902
Show Author Affiliations
Li Yu, China Univ. of Geosciences (China)
Yihe Zhang, China Univ. of Geosciences (China)
Wangshu Tong, China Univ. of Geosciences (China)
Jiwu Shang, China Univ. of Geosciences (China)
Fengzhu Lv, China Univ. of Geosciences (China)
Shanming Ke, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Haitao Huang, The Hong Kong Polytechnic Univ. (Hong Kong, China)


Published in SPIE Proceedings Vol. 8409:
Third International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Yoseph Bar-Cohen; In Lee; Jian Lu, Editor(s)

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