Journal paper
Entry Year102
Journal levelSCI
Paper title (chapter)Studies on the synthesis of low molecular weight, one-dimensional polyanilines prepared by fast emulsion polymerization using (n-dodecylbenzenesulfonic acid)/HCl emulsifiers
Date of publication2012-04-00
Name of author (Chinese)Hsieh, Tar-Hua
Name of author (English)Hsieh, Tar-Hua
Number of authors8
Author's typeOther
Language usedEnglish
NoteLow molecular weight polyaniline nanotubes were prepared by fast emulsion polymerization in the presence of both ndodecylbenzenesulfonic acid (DBSA) and HCl(aq). The anilinium monomers associated with DBSA emulsifiers were found to self-arrange into strands of associated cylindrical micelles before polymerization, as monitored by their optical activity and optical image. In the presence of some HCl(aq), the monomer-associated cylindrical micelles expanded and the polymerization rate could be speeded up. It was found that the low molecular weight (viscosity-averaged molecular weight) polyaniline obtained can easily lead to the formation of highly conductive, one-dimensional nanotubes or nanofibers monitored by the variation of optical activities and λmax of the UV–visible–near IR spectra during polymerization. The DBSA/HCl ratio played an important role in the eventual properties and morphologies of the one-dimensional polyanilines, which can be illustrated by conductivity, SEM and transmission electronmicroscopymeasurements. The resultant one-dimensional polyaniline nanotubes can be arranged into a layered structure by orientation, illustrated by AFM and wide-angle X-ray diffraction.
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