Conducting polymer aerogels from supercritical CO2 drying PEDOT-PSS hydrogels

Xuetong Zhang*, Dongwu Chang, Jiren Liu, Yunjun Luo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

115 Citations (Scopus)

Abstract

The organic conducting PEDOT-PSS aerogels can be prepared by supercritical CO2 drying of metal ion crosslinked PEDOT-PSS supermolecular hydrogels. The PEDOT-PSS hydrogel precursors were synthesized by polymerizing 3,4-ethylenedioxythiophene with excess ferric nitrate as oxidizing agent as well as crosslinking agent in the presence of poly(sodium 4-styrenesulfonate). The supermolecular crosslinking mechanism of the hydrogel precursors and the chemical composition of the resulting aerogels were revealed by X-ray photoelectron spectroscopy (XPS). The molecular structure of the resulting PEDOT-PSS aerogels was further confirmed by Raman and infra-red spectroscopy. The morphology and textural properties of the resultant aerogels were investigated by scanning electron microscopy (SEM), nitrogen adsorption/desorption, and X-ray powder diffraction (XRD) tests, respectively. The resulting aerogels show light weight (0.138-0.232 g cm-3), large BET surface area (170-370 m2 g-1) and hierarchically porous structure with wide pore size distribution. The large surface area and wide pore size distribution, together with their electro-optical properties, would allow these organic conducting aerogels to be applied in many fields with unexpected performance.

Original languageEnglish
Pages (from-to)5080-5085
Number of pages6
JournalJournal of Materials Chemistry
Volume20
Issue number24
DOIs
Publication statusPublished - 2010

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