Thermoreversible gels of polyaniline: Viscoelastic and electrical properties

O. T. Ikkala*, T. Vikki, J. Ruokolainen, P. Hiekkataipale, P. Passiniemi, T. Mäkelä, H. Isotalo

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

5 Citations (Scopus)

Abstract

We demonstrate that polyaniline (PANI) dissolved in dodecyl benzene sulphonic acid (DBSA) shows thermoreversible gelation. The dissolution has been performed in formic acid which allows particle-free complexes according to optical microscopy. Below the gelation temperature the materials are robber-elastic in compression experiments, the storage modulus G′ does not essentially depend on frequency, and the samples are electronically conductive. Above the gelation temperature, G′ indicates flow-like behavior and drastically lower ionic conductivity is observed. These results suggest reversible, i.e. fusible, network formation. The properties are compared with gels consisting of camphor sulphonic acid (CSA) doped PANI dissolved in m-cresol which are poorly thermoreversible.

Original languageEnglish
Title of host publicationSymposium J – Electrical, Optical & Magnetic Properties of Organic Solid-State Materials IV
EditorsJ.R. Reynolds, A.K.Y. Jen, L.R. Dalton, M.F. Rubner, L.Y. Chiang
PublisherMRS
Pages377-382
Number of pages6
ISBN (Print)1-55899-393-2
DOIs
Publication statusPublished - 1997
MoE publication typeA4 Article in a conference publication
EventMaterials Research Society Fall Meeting - Boston, United States
Duration: 1 Dec 19975 Dec 1997

Publication series

NameMATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS
Volume488
ISSN (Print)0272-9172

Conference

ConferenceMaterials Research Society Fall Meeting
Abbreviated titleMRS
CountryUnited States
CityBoston
Period01/12/199705/12/1997

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