Castor oil and commercial thermoplastic polyurethane membranes modified with polyaniline: A comparative study

José Humberto Santos Almeida Jünior, Daniel Assumpção Bertuol, Alvaro Meneguzzi, Carlos Arthur Ferreira, Franco Dani Rico Amado

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

The study of conducting polymeric membranes is decisive in some areas, as in fuel cells and electrodialysis. This work aims the study of membranes using conventional and conductive polymers blends. Two types of polyurethane were used as conventional polymers, commercial thermoplastic polyurethane and polyurethane synthesized from castor oil and 4-4-dicyclohexylmethane isocyanate. Two kinds of conducting polymers were used, polyaniline doped with organic acid and a self doped polyaniline. The polymers and the membranes were characterized by electrical conductivity, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM). The synthesis of the membranes produced was proper, featuring a complete reaction, analyzed by FTIR. The membranes also showed good mechanical properties and thermal stability (≈ 220°C). Among the membranes studied, the polyaniline doped with p-toluenesulphonic acid obtained higher thermal and viscoelastic properties. Thus they can be used in separation techniques using membranes.

Original languageEnglish
Pages (from-to)860-866
Number of pages7
JournalMaterials Research
Volume16
Issue number4
DOIs
Publication statusPublished - 1 Jul 2013
MoE publication typeA1 Journal article-refereed

Keywords

  • Conducting polymer
  • Membranes
  • Thermoplastic polyurethane

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