Journal of Thermal Analysis and Calorimetry

, Volume 136, Issue 4, pp 1615–1629 | Cite as

Electrical, structural and thermal properties of new conductive blends (PANICG) based on polyaniline and cashew gum for organic electronic

  • Daniel Roger Bezerra Amorim
  • Felipe Silva Bellucci
  • Aldo Eloizo Job
  • Iran da Silva Guimarães
  • Helder Nunes da Cunha


The application of cashew gum, in particular the one which is abundant in northeastern Brazil, remains limited to the foods and pharmaceutics industry. In attempting to obtain further potentialities of the cashew gum (CG), its electrical applicability needs to be explored. To this end, the CG is incorporated in blends based on PANI to make an innovative thin self-sustainable blend films (PACG) comprising PANI and CG. The blend films were fabricated by adding the CG in the synthesis process of the polyaniline, and they were prepared by the standard “casting” method. The film materials were blending in three different weight ratios (99:1), (95:5) and (80:20). We also fabricated the only PANI film. As PANI has its conductivity enhanced by doping process, the blends and PANI films were doped by using sulfuric acid at 0.05 and 0.1 mol L−1 concentrations. The characterization of the films was carried out by FTIR spectroscopy, thermal analyses and electrical measurements. The FTIR results exhibited the occurrence of a weak and secondary chemical interaction between PANI and CG. Once there was no appearance of new bands, the profile of the FTIR curves was maintained for the blends and no significant shifts were identified for the maximum frequency of bands. The thermal analysis measurements revealed alteration at the thermal stability temperature of blends due to the doping process and indicated that the thermal profile of the constituent materials (PANI and CG) was preserved in the blends. The electrical studies showed that the undoped blend films exhibited a low level of conductivity as the amount of gum increased. On the other hand, the doped films reached a high level of conductivity in comparison with PANI films and the more the amount of CG in the blend the more is its conductivity. For PACG with 20% of gum, σ increased by a factor of 106, whereas in PANI film, it increased by 104 at the 0.1 mol L−1 doped level. These results point to the possibility of using this sort of blend based on polyaniline and cashew gum as an innovative conductive polymer once it exhibits acceptable electrical, structural and thermal properties.


Polyaniline Cashew gum Conductive blends Electrical, structural and thermal properties 



The authors acknowledge the Brazilian research agencies Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for their financial support, National Institute of Science and Technology on Organic Electronics (INEO) and the postgraduate programs of Materials Science and Technology—POSMAT/UNESP and FÍSICA/UFPI. Funding was provided by FAPESP (Grant No. 2009/00523-8), CAPES (Grant Nos. 5129/09-5, 11208/13-9), CNPq (Grant Nos. 480377/2013-8, 455323/2014-3), Fundação de Ensino, Pesquisa e Extensão de Ilha Solteira (FEPISA) (Grant No. 010/2014).


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2018

Authors and Affiliations

  • Daniel Roger Bezerra Amorim
    • 1
  • Felipe Silva Bellucci
    • 2
    • 3
  • Aldo Eloizo Job
    • 4
  • Iran da Silva Guimarães
    • 5
  • Helder Nunes da Cunha
    • 1
  1. 1.UFPI - Universidade Federal do PiauíTeresinaBrazil
  2. 2.MCTIC - Ministério da Ciência, Tecnologia, Inovação e ComunicaçõesBrasíliaBrazil
  3. 3.FEIS – Faculdade de Engenharia de Ilha SolteiraUNESP – Universidade Estadual PaulistaIlha SolteiraBrazil
  4. 4.FCT – Faculdade de Ciências e TecnologiaUNESP – Universidade Estadual PaulistaPresidente PrudenteBrazil
  5. 5.IFMA- Instituto Federal do Maranhão - Campus de São João dos PatosSão João dos PatosBrazil

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