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Effects of acidity on the size of polyaniline-poly(sodium 4-styrenesulfonate) composite particles and the stability of corresponding colloids in water
Journal article   Peer reviewed

Effects of acidity on the size of polyaniline-poly(sodium 4-styrenesulfonate) composite particles and the stability of corresponding colloids in water

Ligui Li, Linhui Ferng, Yen Wei, Catherine Yang and Hai-Feng Ji
Journal of colloid and interface science, v 381(1), pp 11-16
01 Sep 2012
DOI: https://doi.org/10.1016/j.jcis.2012.05.004
PMID: 22647343

Abstract

Conductive polymer PANI PANI–PSS nanoparticles Poly(sodium 4-styrenesulfonate) Polyaniline PSS
[Display omitted] ► Polyaniline-poly(sodium 4-styrenesulfonate) (PANI–PSS)composite particles. ► A general oxidation approach to prepare PANI–PSS composite nanoparticles. ► Highly stable colloids in water or buffer over a wide range of pH from 1 to 11. ► Controlled size of the PANI–PSS composite particles by the acidity of precursor solutions. The practical application of polyaniline-poly(sodium 4-styrenesulfonate) (PANI–PSS) composite particles has been held back by the low stability of their dispersed state in water. In this work, we present a general oxidation approach to prepare PANI–PSS composite nanoparticles that can form highly stable colloids in water or buffer over a wide range of pH from 1 to 11. We demonstrate that the size of the PANI–PSS composite particles can be controlled by the acidity of precursor solutions. It is hypothesized that the number of negatively charged sites on PSS, which can be affected by the acidity of the precursor solutions, plays an important role in determining the size of the PANI–PSS composite particles and the stability of corresponding colloids in water.

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Chemistry, Physical
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