Experimental Investigation of Morphological and Electrical Characteristics of PS/MWCNT Nanocomposite Films

Abstract:

Electrical characteristics and morphology of nanocomposite films composed of two different polystyrene (PS) latexes impregnated with multi-walled carbon nanotubes (MWCNT) in the range between 0 wt% and 20 wt% were assessed by considering photon transmission (UV-Vis) technique and electrical conductivity measurements. Emulsion polymerization technique was employed both to synthesize very fine PS particles dispersed in water and to tailor the sizes of the PS particles as 382 nm and 560 nm, respectively. PS/MWCNT nanocomposite films were obtained from the liquid form on glass substrates via drop-casting method and all they dried at 40 QUOTE C. Each dried sample was then annealed at varying temperatures between 100 QUOTE C and 250 QUOTE C for 10 min. The surface conductivity QUOTE of each annealed film at 250 QUOTE C was measured and was found to increase dramatically above a certain mass fraction of MWCNT content, QUOTE . Each set of PS/MWCNT nanocomposite film had a similar electrical percolation threshold of QUOTE =1.5 wt% as the MWCNT content and critical exponents of QUOTE were found to be 2.64 and 1.19 for 382 nm and 560 nm PS latex systems, respectively.

• Periodical: Materials Science Forum (Volume 915)
• Pages: 104-109
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.915.104
• Online since: March 2018
• Authors: Barış Demirbay*, Şaziye Uğur
• Keywords: Electrical Conductivity, Multi-Walled Carbon Nanotubes, Nanocomposites, Optical Transmission, Polystyrene Latex

References

[1] S. Ugur, O. Yildiz, S. Kara: Materials Science and Applications Vol. 65 (2017) 79-100.

[2] S. Ugur, M.S. Sunay: Colloids Surf A Physicochem Eng Asp. Vol. 510 (2016) 283-292.

[3] D. Stauffer, A. Aharony: Introduction to Percolation Theory (Taylor and Francis, England 1992).

[4] M. Weber, M.R. Kamal: Polym Compos Vol. 18 (1997) 711–725.

[5] F. Lux: J Mater Sci Vol. 28 (1993) 285–301.

[6] N. Li, Y. Huang, F. Du, X.B. He, X. Lin, H.J. Gao: Nano Lett Vol. 6 (2006) 1141–1150.

[7] M. B. Bryning, M.F. Islam, J.M. Kikkawa, A.G. Yodh: Adv Mater Vol. 17 (2005) 1186–1191.

[8] H. M. Kim, K. Kim, S.J. Lee, J. Joo, H.S. Yoon, S.J. Cho: Current Applied Physics Vol. 4 (2004) 577-580.

[9] W. Bauhofer, J. Lott: Compos. Sci. Technol. Vol. 69 (2009) 1486-1498.

[10] M. Al-Saleh, U. Sundararaj: Carbon Vol. 47 (2009) 2-22.