Effect of temperature on the electrical conductivity of polyaniline/cashew gum blends
dc.contributor.author | Amorim, Daniel R.B. | |
dc.contributor.author | da Silva Guimarães, Iran | |
dc.contributor.author | Fugikawa-Santos, Lucas [UNESP] | |
dc.contributor.author | Vega, Maria L. | |
dc.contributor.author | da Cunha, Helder N. | |
dc.contributor.institution | Universidade de São Paulo (USP) | |
dc.contributor.institution | Instituto Federal do Maranhão - IFMA | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.contributor.institution | Universidade Federal do Piauí - UFPI | |
dc.date.accessioned | 2020-12-12T01:28:46Z | |
dc.date.available | 2020-12-12T01:28:46Z | |
dc.date.issued | 2020-10-01 | |
dc.description.abstract | The electrical properties of polymeric films/blends comprising polyaniline (PANI) and cashew gum (CG) blends were studied by impedance spectroscopy in the temperature range from 300 K to 353 K. Protonation promoted by sulfuric acid was responsible for changing the oxidation state from undoped emeraldine base (EB) to doped emeraldine salt (ES). The low-frequency conductivity of the films varied more than 6 orders of magnitude by doping. In (PANI- EB)/CG blends, the presence of cashew gum acts a dispersing agent, lowering the electrical conductivity contrasting to (PANI-ES)/CG blends, where the electrical conductivity increases with CG concentration up to 20% (w/w). Moreover, undoped films presented a thermally-activated electrical conductivity, whereas doped films presented a decrease in the conductivity by increasing temperature. An equivalent circuit model is proposed to analyze the data by considering the system being composed of highly conductive regions separated by insulating/semiconducting ones. | en |
dc.description.affiliation | Instituto de Física de São Carlos Universidade de São Paulo | |
dc.description.affiliation | Instituto Federal do Maranhão - IFMA Campus de São João dos Patos | |
dc.description.affiliation | Universidade Estadual Paulista - UNESP Departamento de Física | |
dc.description.affiliation | Universidade Federal do Piauí - UFPI Departamento de Física | |
dc.description.affiliationUnesp | Universidade Estadual Paulista - UNESP Departamento de Física | |
dc.description.sponsorship | Instituto Nacional de Ciência e Tecnologia em Eletrônica Orgânica | |
dc.identifier | http://dx.doi.org/10.1016/j.matchemphys.2020.123383 | |
dc.identifier.citation | Materials Chemistry and Physics, v. 253. | |
dc.identifier.doi | 10.1016/j.matchemphys.2020.123383 | |
dc.identifier.issn | 0254-0584 | |
dc.identifier.scopus | 2-s2.0-85086870887 | |
dc.identifier.uri | http://hdl.handle.net/11449/199024 | |
dc.language.iso | eng | |
dc.relation.ispartof | Materials Chemistry and Physics | |
dc.source | Scopus | |
dc.subject | Cashew gum | |
dc.subject | Conductivity | |
dc.subject | Polyaniline | |
dc.subject | Thermal effect | |
dc.title | Effect of temperature on the electrical conductivity of polyaniline/cashew gum blends | en |
dc.type | Artigo |