title: Morphology evolution of polyaniline microstructures via reverse micelles and their hydrophobicity.
abstract: Polyaniline morphology evolution in toluene has been observed for the first time. Various structures, including one-dimensional open-ended microtubes, three-dimensional solid microspheres and two-dimensional novel solid microplates were controllably synthesized in the same reaction system. The structures obtained were sensitive to oxidant concentration and molar ratio of monomer to oxidant. Solid microplates were mainly formed on the glass beaker wall and bottom, while tubes and spheres were produced in solution by employing reverse micelles as soft templates. Studies on the effect of reaction temperature, mechanical stirring and the addition of more acid were also carried out. FTIR and UV-Vis results showed that the PANI products were in the emeraldine form. The PANI film prepared from spheres exhibited hydrophobic property due to its rough surface covered with nanoscale dots and the large distribution of sphere diameters.
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543.
authors.forename: Tao
authors.initials: T
authors.lastname: Wen
authors.forename: Jiahua
authors.initials: J
authors.lastname: Shi
authors.forename: Minrui
authors.initials: M
authors.lastname: Zheng
authors.forename: Binni
authors.initials: B
authors.lastname: Varghese
authors.forename: Chorng-Haur
authors.initials: CH
authors.lastname: Sow
authors.forename: Hardy Sze On
authors.initials: HS
authors.lastname: Chan
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D057927:Hydrophobic and Hydrophilic Interactions; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008823:Micelles; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D000814:Aniline Compounds; D046911:Macromolecular Substances; D008823:Micelles; C416807:polyaniline