Wettability switching of SDS-doped polyaniline from hydrophobic to hydrophilic induced by alkaline/reduction reactions

Wenguang Leng; Shuxue Zhou; Guangxin Gu; Limin Wu

doi:10.1016/j.jcis.2011.11.080

Wettability switching of SDS-doped polyaniline from hydrophobic to hydrophilic induced by alkaline/reduction reactions

J Colloid Interface Sci. 2012 Mar 1;369(1):411-8. doi: 10.1016/j.jcis.2011.11.080. Epub 2011 Dec 8.

Authors

Wenguang Leng¹, Shuxue Zhou, Guangxin Gu, Limin Wu

Affiliation

¹ Department of Materials Science, Key Laboratory of Molecular Engineering of Polymers of MOE, Fudan University, Shanghai, PR China.

PMID: 22196348
DOI: 10.1016/j.jcis.2011.11.080

Abstract

In this paper, sodium dodecyl sulfate (SDS) is used as dopant to manipulate both morphology and wettability of polyaniline (PANI). When SDS amount is controlled within a certain range, micro/nano double-rough PANI with hydrophobic surface can be obtained, while insufficient or excess SDS can only lead to hydrophilic PANI. The double-rough PANI shows stimuli-responsive change in wettability to either alkaline reaction or reduction reaction from hydrophobicity to hydrophilicity. This quick response can be applied to quantitatively estimate NaOH concentrations within the range of 10(-3)-10(-1)M and to detect various reducing liquids.