PT/BORAX COMPOSITE AS A HIGH DIELECTRIC CONSTANT MATERIAL WITH LOWER DIELECTRIC LOSS

Abstract

In recent years, high dielectric constant composites have been considered as the key materials for many cutting-edge applications such as supercapacitors, memory devices, electrical, mechanical, and biochemical engineering. However, the high dielectric loss at low frequencies become a crucial problem which makes the composite unsuitable for these technological applications. In this respect, this work has been devoted to prepare a new high dielectric constant composite material with low dielectric loss. From this point of view, Polythiophene /Na₂B₄O₇ (PT/Borax) composites with different borax contents varying from 10.0 wt.% to 50.0 wt.% have been prepared. The morphology and chemical structure of the composites as well as pure PT have been determined by Scanning Electron Microscopy (SEM) and Fourier Transformed Infrared (FTIR) Spectroscopy, respectively. The dielectric properties of the samples have been measured within 100Hz-16.5MHz frequency region at room temperature. The polymer composite with high dielectric constant and low dielectric loss at low frequency for various technological applications has been achieved for 50.0 wt.% Borax additive. The dielectric relaxation mechanism of the samples have also been identified as non-Debye type. The electrical conductivity properties of the samples have also been discussed in terms of Jonscher’s Universal power law.

Keywords

• High dielectric constant,low dielectric loss,polymer composites,polythiophene,borax

References

1. [1] Zhang L, Liu Z, Lu X, Yang G, Zhang X, Cheng Z-Y. Nano-clip based composites with a low percolation threshold and high dielectric constant. Nano Energy 2016;26:550-7.
2. [2] ZHANG L, Cheng Z-Y. Development of polymer-based 0–3 composites with high dielectric constant. Journal of Advanced Dielectrics 2011;1:389-406.
3. [3] Tsui B-Y, Su T-T, Shew B-Y, Huang Y-T. Effect of surface preparation on the radiation hardness of high-dielectric constant gate dielectric. Solid-State Electronics 2013;81:119-23.
4. [4] Ribes G, Mitard J, Denais M, Bruyere S, Monsieur F, Parthasarathy C, et al. Review on high-k dielectrics reliability issues. IEEE Transactions on Device and materials Reliability 2005;5:5-19.
5. [5] Baldwin AF, Ma R, Mannodi‐Kanakkithodi A, Huan TD, Wang C, Tefferi M, et al. Poly (dimethyltin glutarate) as a prospective material for high dielectric applications. Advanced Materials 2015;27:346-51.
6. [6] Wan Y-J, Zhu P-L, Yu S-H, Yang W-H, Sun R, Wong C-P, et al. Barium titanate coated and thermally reduced graphene oxide towards high dielectric constant and low loss of polymeric composites. Composites Science and Technology 2017;141:48-55.
7. [7] Gumus OY, Unal HI, Erol O, Sari B. Synthesis, characterization, and colloidal properties of polythiophene/borax conducting composite. Polymer Composites 2011;32:418-26.
8. [8] Tarcan E. Structural and Dielectric Properties of Polythiophene/Chrom (III) Acetylacetonate Composites. Journal of Macromolecular Science, Part B 2015;54:897-906.

9. [9] Kim SH, Hyun K, Moon TS, Mitsumata T, Hong JS, Ahn KH, et al. Morphology–rheology relationship in hyaluronate/poly (vinyl alcohol)/borax polymer blends. Polymer 2005;46:7156-63.
10. [10] Seo K, Chung I. Reaction analysis of 3, 4-ethylenedioxythiophene with potassium persulfate in aqueous solution by using a calorimeter. Polymer 2000;41:4491-9.
11. [11] Tran-Van F, Garreau S, Louarn G, Froyer G, Chevrot C. Fully undoped and soluble oligo (3, 4-ethylenedioxythiophene) s: spectroscopic study and electrochemical characterization. Journal of Materials Chemistry 2001;11:1378-82.
12. [12] Vijayan M, Trivedi D. Studies on polyaniline in methane sulphonic acid (MeSA). Synthetic metals 1999;107:57-64.
13. [13] Cole KS, Cole RH. Dispersion and absorption in dielectrics I. Alternating current characteristics. The Journal of chemical physics 1941;9:341-51.
14. [14] Haase W, Wróbel S. Relaxation phenomena: liquid crystals, magnetic systems, polymers, high-Tc superconductors, metallic glasses: Springer Science & Business Media; 2013.
15. [15] Meller A. The System Boron-Nitrogen. B Boron Compounds: Springer; 1991. p. 1-261.
16. [16] Menczel JD, Prime RB. Thermal analysis of polymers: fundamentals and applications: John Wiley & Sons; 2014.
17. [17] Adam N, Uğur AL, Altındal A, Erdoğmuş A. Synthesis, characterization and dielectric properties of novel phthalocyanines bearing an octa-peripherally substituted mercaptoquinoline moiety. Polyhedron 2014;68:32-9.
18. [18] Jonscher AK. Dielectric relaxation in solids. Journal of Physics D: Applied Physics 1999;32:R57.