RT Journal Article
T1 Cyclic temperature dependence of electrical conductivity in polyanilines as a function of the dopant and synthesis method
A1 Horta Romarís, Laura
A1 Abad López, María José
A1 González Del Campo Rodríguez Barbero, M. Victoria
A1 Lasagabaster Latorre, Aurora
A1 Costa, Pedro
A1 Lanceros Méndez, Senentxu
AB Most of the studies dealing with polyanilines (PANIs) are focused on electrochemical polymerization; however, chemical polymerization is more suitable for large–scale production. In order to develop commercially viable, clean, effective materials for thermal sensor devices, temperature dependent electrical response has been studied in PANIs obtained by simple, low-cost synthesis conditions, transferable to industrial processing. PANIs doped with HCl, dodecylbenzene sulfonic acid (DBSA) and sodio-5-sulfoisophtalic acid (NaSIPA) were prepared by chemical oxidative polymerization, through direct and indirect routes of synthesis. TEM images disclosed formation of nanorods and microfibrils. Microstructural analysis confirmed differences in doping level and crystallinity which were related with the PANI conductivity.Two PANI-DBSA synthesized by direct and indirect methods, exhibit the best conductivity retention up to 150 °C. In cyclic tests, they show excellent performance after 4 heating-cooling cycles up to 70 °C. The amplitude of electrical response for PANI-DBSA obtained by direct synthesis is twice the value of PANI-DBSA prepared by indirect route. Conversely, the latter displays slightly better repeatability due to its lower moisture content. This study suggests that both PANI-DBSA are suitable for use in electronic applications, under ambient conditions below 150 °C, and are promising materials for temperature sensor applications.
PB Elsevier
SN 0264-1275
YR 2017
FD 2017-01-15
LK https://hdl.handle.net/20.500.14352/18119
UL https://hdl.handle.net/20.500.14352/18119
LA eng
NO Horta Romarís, L., Abad López, M. J., González Del Campo Rodríguez, M. V. et al. «Cyclic Temperature Dependence of Electrical Conductivity in Polyanilines as a Function of the Dopant and Synthesis Method». Materials & Design, vol. 114, enero de 2017, pp. 288-96. DOI.org (Crossref), https://doi.org/10.1016/j.matdes.2016.11.021.
NO Xunta de Galicia
NO Fundação para a Ciência e a Tecnologia (Portugal)
DS Docta Complutense
RD 26 abr 2025