Preparation and Characterization of Extruded PLA Films Coated with Polyaniline or Polypyrrole by In Situ Chemical Polymerization

José Ramón Flores León, Jesús Manuel Quiroz Castillo*, Dora Evelia Rodríguez Félix, María Mónica Castillo Ortega, Ana Daymi Cabrera-González, Claudia Georgina Ramirez-Mendoza, Hisila Santacruz-Ortega, Guillermo Suárez-Campos, Jesús Leobardo Valenzuela-García, Pedro Jesús Herrera-Franco

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Conductive polymers, such as polypyrrole and polyaniline, have been extensively studied for their notable intrinsic electronic and ionic conductivities, rendering them suitable for a range of diverse applications. In this study, in situ chemical polymerization was employed to coat extruded PLA films with PPy and PANi. Morphological analysis reveals a uniform and compact deposition of both polyaniline and polypyrrole after polymerization periods of 3 and 1 h, respectively. Furthermore, the PLA-PANi-3h and PLA-PPy-1h composites exhibited the highest electrical conductivity, with values of 0.042 and 0.022 S cm-1, respectively. These findings were in agreement with the XPS results, as the polyaniline-coated film showed a higher proportion of charge carriers compared to the polypyrrole composite. The elastic modulus of the coated films showed an increase compared with that of pure PLA films. Additionally, the inflection temperatures for the PLA-PANi-3h and PLA-PPy-1h composites were 368.7 and 367.2 °C, respectively, while for pure PLA, it reached 341.47 °C. This improvement in mechanical and thermal properties revealed the effective interfacial adhesion between the PLA matrix and the conducting polymer. Therefore, this work demonstrates that coating biopolymeric matrices with PANi or PPy enables the production of functional and environmentally friendly conductive materials suitable for potential use in the removal of heavy metals in water treatment.

Original languageEnglish
Pages (from-to)43243-43253
Number of pages11
JournalACS Omega
Issue number45
StatePublished - 14 Nov 2023

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© 2023 The Authors. Published by American Chemical Society.


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