DOI: 10.1002/macp.1995.021960803. Self‐assembly of the electroactive complexes of polyaniline and surfactant

Self‐assembly of the electroactive complexes of polyaniline and surfactant

10.1002/macp.1995.021960803

Crossref journal-article

Wiley

Macromolecular Chemistry and Physics (311)

Abstract

AbstractAn electroactive material with remarkable solubility, processibility as well as mechanical properties has been developed by complexation (thermal doping) of polyaniline (PANi) emeraldine base with dodecylbenzenesulfonic acid (DBSA) in the solid state. Isothermal treatment of such a mixture was found to promote the complex formation. Optimum conditions of complexation were established with respect to the formation of layered structure, electrical conductivity and solubility. The optimal temperature for the doping process was found to be in a range of 100–120°C while the best ratio of DBSA to PANi was between 3:1 and 4:1 by weight, a nearly stoichiometric equivalence of aniline repeat units and DBSA molecules. The time of isothermal treatment should be controlled within 30 min. Thermal doping induced orientation to polymer chains in a layered structure, whereby the hydrophobic tails of the surfactants function as spacers between parallel stacks of the main chains. This anisotropy was achieved by the self‐assembly during the thermal doping rather than ordinary drawing or stretching of the polymers. A unique liquid crystalline mesophase with a smectic‐like optical texture was observed for the soluble portions of some specimens. The excess DBSA in the samples is considered to function as a solvent and to give rise to the liquid crystalline fluidity of the phase. The scanning tunneling microscopy (STM) image 5000 × 5000 Å on a submicrometer scale obtained from a PANi/DBSA thin film exhibits a surface morphology with a granular size of 200–300 Å. The image of 150 × 150 Å on a molecular scale obtained from multilayer PANi/DBSA deposited on a highly oriented pyrolytic graphite (HOPG) surface provides a direct observation of a self‐assembled structure and close layer packing of the polymer backbone with dimensions in accord with the results found by X‐ray diffraction. Our results indicate that the thermal doping process of polyaniline by DBSA offers new possibilities to obtain optimal structures through a self‐assembly.

Authors 6

Wen‐Yue Zheng (first)
Rong‐Hai Wang (additional)
Kalle Levon (additional)
Zhao Y. Rong (additional)
Tapani Taka (additional)
Wendy Pan (additional)

References 28 Referenced 91

10.1103/PhysRevB.43.4373
10.1016/0379-6779(93)90147-O
10.1016/0032-3861(93)90383-L
10.1021/ma00003a022
A. G.MacDiarmid A. J.Epstein NEDO Conference Synthetic Metals in press
10.1002/anie.198801131
10.1002/anie.198902533
10.1016/0079-6700(94)90038-8
10.1002/macp.1993.021940306
10.1002/marc.1994.030150102
10.1021/ma00104a034
10.1021/ma00080a026
10.1021/ma00039a001
10.1016/0379-6779(92)90053-L
K.Levon K. H.Ho W. Y.Zheng J.Laakso T.Kärnä T.Taka Polymer in press
10.1016/0032-3861(94)90329-8
10.1016/0032-3861(93)90381-J
10.1002/marc.1984.030050307
10.1021/j100378a087
{'key': 'e_1_2_1_19_2', 'first-page': '256', 'volume': '19', 'author': 'Jeon D.', 'year': '1992', 'journal-title': 'Science'} / Science by Jeon D. (1992)
10.1021/ma00085a053
G.Wegner privat discussion
10.1103/PhysRevB.49.7749
T.Kärnä J.Laakso F.Savolainen K.Levon Patent Application No. 925534(filed 4/12/1992) and accepted 9/13/1994
10.1016/0379-6779(93)90962-V
10.1021/ma00063a029
10.1016/B978-0-12-174680-3.50008-8
10.1016/0379-6779(89)90476-1

Dates

Type	When
Created	22 years, 4 months ago (April 17, 2003, 6:03 a.m.)
Deposited	1 year, 10 months ago (Oct. 26, 2023, 9:34 a.m.)
Indexed	1 month ago (July 30, 2025, 10:18 a.m.)
Issued	30 years, 1 month ago (Aug. 1, 1995)
Published	30 years, 1 month ago (Aug. 1, 1995)
Published Online	22 years, 5 months ago (March 12, 2003)
Published Print	30 years, 1 month ago (Aug. 1, 1995)

Funders 0

None

BibTeX

@article{Zheng_1995, title={Self‐assembly of the electroactive complexes of polyaniline and surfactant}, volume={196}, ISSN={1521-3935}, url={http://dx.doi.org/10.1002/macp.1995.021960803}, DOI={10.1002/macp.1995.021960803}, number={8}, journal={Macromolecular Chemistry and Physics}, publisher={Wiley}, author={Zheng, Wen‐Yue and Wang, Rong‐Hai and Levon, Kalle and Rong, Zhao Y. and Taka, Tapani and Pan, Wendy}, year={1995}, month=aug, pages={2443–2462} }

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