Studies on one‐dimensional polyanilines prepared with n‐dodecylbenzenesulfonic and camphorsulfonic acids |
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| Authors: | Yen‐Zen Wang Ming‐Jer Tsai Tar‐Hwa Hsieh Po‐Hao Tseng Chung‐Yi Lu Ko‐Shan Ho |
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| Affiliation: | 1. Department of Chemical and Materials Engineering, National Yun‐Lin University of Science and Technology, Yun‐Lin, Taiwan;2. Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, Taiwan;3. Graduate Institute of Electrical Engineering, National Taiwan University, Taipei, Taiwan |
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| Abstract: | Anilinium salts complexed with n‐dodecylbenzenesulfonic acid (DBSA) and camphorsulfonic acid (CSA) were found to self‐assemble into cylindrical micelles with bigger diameters than those complexed with only DBSA or CSA. These cylindrical micelles were polymerized into one‐dimensional copolyaniline nanotubes (PANIDBSACSA) via emulsion polymerization, demonstrating various morphologies depending on the ratio of DBSA to CSA. The UV?visible?NIR spectra of neat PANICSA and PANIDBSACSAs illustrate significant free carrier tails in the NIR region and conductivity 10–20 times higher than that of neat PANIDBSA whose UV?visible?NIR spectrum does not illustrate significant carrier tails. When the number of moles of DBSA is equivalent to or exceeds that of CSA in the polymerization mixture, SEM and TEM micrographs of the PANIDBSACSAs reveal that they have larger diameters than that of neat PANIDBSA. Besides, some of the surfaces of the big nanotubes were implanted and mounted with lots of small nanofibers of neat PANICSA polymerized from some of the CSA‐complexed aniliniums which were excluded from the cylindrical micelles before polymerization. TGA thermograms of PANIDBSACSAs show an intimate relationship between thermal deprotonation and the DBSA to CSA ratio. X‐ray diffraction patterns demonstrate a layered structure arrangement of polyaniline molecules of all one‐dimensional nanofibers. © 2015 Society of Chemical Industry |
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| Keywords: | polyaniline free carrier tail camphorsulfonic acid emulsion polymerization |
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