Organic Robotics Based on Conducting Polymers

Abstract:

Free-standing films made of poly(3,4-ethylenedioxythiophene) doped with poly(4-styrenesulfonate) (PEDOT/PSS) were prepared by casting water dispersion of its colloidal particles. Specific surface area, water vapor sorption, and electro-active polymer actuating behavior of the resulting films were investigated by means of sorption isotherm, and electromechanical analysis. It was found that the non-porous PEDOT/PSS film, having a specific surface area of 0.13 m2/g, sorbed water vapor of 1080 cm3(STP)/g, corresponding to 87 wt%, at relative water vapor pressure of 0.95. A temperature rise from 25 to 40 °C lowered sorption degree, indicative of an exothermic process, where isosteric heat of sorption decreased with increasing water vapor sorption and the value reached 43.9 kJ/mol, being consistent with the heat of water condensation (44 kJ/mol). Upon application of 10 V, the film underwent contraction of 2.4% in air at 50% relative humidity (RH) which significantly increased to 4.5% at 90% RH. The principle lay in desorption of water vapor sorbed in the film due to Joule heating, where electric field was capable of controlling the equilibrium of water vapor sorption.

• Periodical: Advances in Science and Technology (Volume 79)
• Pages: 87-93
• DOI: https://doi.org/10.4028/www.scientific.net/AST.79.87
• Online since: September 2012
• Authors: Hidenori Okuzaki
• Keywords: Actuator, Artificial Muscles, Conducting Polymer, PEDOT/PSS, Water Vapor

References

[1] E. Smela, O. Inganäs, I. Lundström, Science 268 (1995) 1735.

[2] R.H. Baughman, L.W. Shacklette, R.L. Elsenbaumer, E.J. Plichta, C. Becht, Molecular Electronics, Kluwer Academic Pub., Netherlands, (1991).

[3] T.F. Otero, J. Rodriguez, Intrinsically Conducting Polymers, Kluwer Academic Pub., Netherlands, (1993).

[4] Q. Pei, O. Inganäs, Synth. Met. 55-57 (1993) 3730.

[5] J.M. Sansinena, V. Olazabal, T.F. Otero, C.N.P. da Fonseca, M.A. De Paoli, Chem. Commun., (1997) 2217.

[6] W. Lu, A.G. Fadeev, B. Qi, E. Smela, B.R. Mattes, J. Ding, G.M. Spinks, J. Mazurikiewicz, D. Zhou, G.G. Wallace, D.R. MacFarlane, S.A. Forsyth, M. Forsyth, Science 297 (2002) 983.

DOI: 10.1126/science.1072651

[7] H. Okuzaki, T. Kunugi, J., Polym. Sci., Polym. Phys. 34 (1996) 1747.

[8] H. Okuzaki, T. Kunugi, J. Appl. Polym. Sci. 64 (1997) 383.

[9] H. Okuzaki, T. Kuwabara, T. Kunugi, Polymer 38 (1997) 5491.

[10] H. Okuzaki, T. Kunugi, J. Polym. Sci., Polym. Phys. 36 (1998) 1591.

[11] H. Okuzaki, K. Funasaka, Macromolecules 33 (2000) 8307.

[12] D. Hohnholz, H. Okuzaki, A.G. MacDiarmid, Adv. Funct. Mater. 15 (2005) 51.

[13] M. Granström, M. Berggren, O. Inganäs, Science 267 (1995) 1479.

[14] H. Sirringhaus, T. Kawase, R.H. Friend, T. Shimoda, M. Inbasekaran, W. Wu, E.P. Woo, Science 290 (2000) 2123.

DOI: 10.1126/science.290.5499.2123

[15] H. Okuzaki, K. Hosaka, H. Suzuki, T. Ito, Sensors Actuators A 157 (2010) 96.

[16] S. Brunauer, P.H. Emmett, E. Teller, J. Am. Chem. Soc. 60 (1938) 309.

[17] D. Dutta, S. Chatterjee, K.T. Pillai, P.K. Pujari, B.N. Ganguly, Chem. Phys. 312 (2005) 319.

[18] G. Ertl, H. Knozinger, J. Weitkamp, Preparation of Solid Catalysis, Wiley-VCH, Weinheim, (1999).

[19] H. Yan, S. Arima, Y. Mori, T. Kagata, H. Sato, H. Okuzaki, Thin Solid Films 517 (2009) 3299.

DOI: 10.1016/j.tsf.2009.01.004

[20] H. Okuzaki, T. Kondo, T. Kunugi, Polymer 40 (1999) 995.

[21] S. Ross, I.P. Oliver, On Physical Adsorption, Interscience, New York, (1964).

[22] G.M. Barrow, Physical Chemistry, McGraw-Hill, New York, (1961).

[23] H. Okuzaki, H. Suzuki, T. Ito, Synth. Met. 159 (2009) 2233.

[24] H. Okuzaki, H. Suzuki, T. Ito, J. Phys. Chem. B 113 (2009) 11378.

[25] H. Okuzaki, K. Funasaka, Synth. Met. 108 (2000) 127.

[26] M. Bergamasco, F. Salsedo, P. Dario, Sens. Actuators 17 (1989) 115.

[27] R. Pelrine, R. Kornbluh, Q. Pei, J. Joseph, Science 287 (2000) 836.

[28] J.K. Lee, M.A. Marcus, Ferroelectrics 32 (1981) 93.