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Effect of dopant on the properties of polyaniline/carbon nanofiber composites
Polyaniline-modified carbon nanofibers were prepared in the presence of five different dopant acids, namely toluene sulfonic acid (TSA), hydrochloric acid (HCl), sulfuric acid (H 2 SO 4 ), phosphoric acid (H 3 PO 4 ) and camphor sulfonic acid (CSA), by oxidative polymerization. A comparative study o...
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Published in: | Polymer bulletin (Berlin, Germany) Germany), 2019-10, Vol.76 (10), p.5253-5267 |
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Main Authors: | , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Polyaniline-modified carbon nanofibers were prepared in the presence of five different dopant acids, namely toluene sulfonic acid (TSA), hydrochloric acid (HCl), sulfuric acid (H
2
SO
4
), phosphoric acid (H
3
PO
4
) and camphor sulfonic acid (CSA), by oxidative polymerization. A comparative study on the effect of various types of dopants on the properties of PANI/CNF composite was performed. The electrical, dielectric and thermal properties of PANI/CNF composites were studied in contrast to pure PANI. Unlike polyaniline, all polyaniline/carbon nanofiber combination resulted in enhanced electrical and dielectric properties. Higher conductivity and thermal dependence of DC conductivity were obtained for toluene sulfonic acid-doped composite. UV–Vis analysis of the composites showed that the appreciable increase in conductivity of TSA-doped PANI/CNF composite is due to the extensive electron transfer. Further, thermogravimetric analysis showed improved thermal stability compared to PANI. A significant improvement is observed for organic acid-doped composites which suggest the presence of strong interaction between
π
orbitals of CNF and the quinoid rings of PANI. Hence, the study indicated that the dopants had a remarkable effect on the properties of PANI/CNF composites. |
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ISSN: | 0170-0839 1436-2449 |
DOI: | 10.1007/s00289-018-2649-7 |