Electrorheology of Suspensions of Variously Protonated Polyaniline Particles under Steady and Oscillatory Shear
Electrorheological (ER) and dielectric properties of silicone-oil suspensions of polyaniline (PANI) particles protonated with phosphoric and tetrafluoroboric acids to various doping level have been investigated. The particle conductivity was thus varied between the order of 10-9 S/cm and 10-4 S/cm....
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2010-10-01
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| Series: | Applied Rheology |
| Subjects: | |
| Online Access: | https://doi.org/10.3933/applrheol-20-55371 |
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| author | Stenicka Martin Pavlinek Vladimir Sáha Petr Blinova Natalie V. Stejskal Jaroslav Quadrat Otakar |
| author_facet | Stenicka Martin Pavlinek Vladimir Sáha Petr Blinova Natalie V. Stejskal Jaroslav Quadrat Otakar |
| author_sort | Stenicka Martin |
| collection | DOAJ |
| description | Electrorheological (ER) and dielectric properties of silicone-oil suspensions of polyaniline (PANI) particles protonated with phosphoric and tetrafluoroboric acids to various doping level have been investigated. The particle conductivity was thus varied between the order of 10-9 S/cm and 10-4 S/cm. The dynamic yield stresses obtained at controlled shear rate mode viscometry, the storage moduli from the oscillatory shear experiments and the dielectric relaxation times from frequency dependences of dielectric constant and loss factor were used as criteria of rigidity or elasticity of ER structures and particle mobility in the electric field. The conductivity of suspension particles plays a decisive role in their ER behaviour. The ER efficiency increased as conductivity of dispersed particles raised, irrespective of the type of employed acid used for the protonation of PANI. |
| first_indexed | 2024-12-21T03:46:46Z |
| format | Article |
| id | doaj.art-e4e8d9c89d6047c588a9e5336716f9b7 |
| institution | Directory Open Access Journal |
| issn | 1617-8106 |
| language | English |
| last_indexed | 2024-12-21T03:46:46Z |
| publishDate | 2010-10-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Applied Rheology |
| spelling | doaj.art-e4e8d9c89d6047c588a9e5336716f9b72022-12-21T19:17:04ZengDe GruyterApplied Rheology1617-81062010-10-0120510.3933/applrheol-20-55371Electrorheology of Suspensions of Variously Protonated Polyaniline Particles under Steady and Oscillatory ShearStenicka Martin0Pavlinek Vladimir1Sáha Petr2Blinova Natalie V.3Stejskal Jaroslav4Quadrat Otakar5Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, TGM 275, 762 72Zlin, Czech RepublicPolymer Centre, Faculty of Technology, Tomas Bata University in Zlin, TGM 275, 762 72Zlin, Czech RepublicPolymer Centre, Faculty of Technology, Tomas Bata University in Zlin, TGM 275, 762 72Zlin, Czech RepublicInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06Prague6, Czech RepublicInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06Prague6, Czech RepublicInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06Prague6, Czech RepublicElectrorheological (ER) and dielectric properties of silicone-oil suspensions of polyaniline (PANI) particles protonated with phosphoric and tetrafluoroboric acids to various doping level have been investigated. The particle conductivity was thus varied between the order of 10-9 S/cm and 10-4 S/cm. The dynamic yield stresses obtained at controlled shear rate mode viscometry, the storage moduli from the oscillatory shear experiments and the dielectric relaxation times from frequency dependences of dielectric constant and loss factor were used as criteria of rigidity or elasticity of ER structures and particle mobility in the electric field. The conductivity of suspension particles plays a decisive role in their ER behaviour. The ER efficiency increased as conductivity of dispersed particles raised, irrespective of the type of employed acid used for the protonation of PANI.https://doi.org/10.3933/applrheol-20-55371polyanilineelectrorheologysteady shearoscillatory modeprotonation |
| spellingShingle | Stenicka Martin Pavlinek Vladimir Sáha Petr Blinova Natalie V. Stejskal Jaroslav Quadrat Otakar Electrorheology of Suspensions of Variously Protonated Polyaniline Particles under Steady and Oscillatory Shear Applied Rheology polyaniline electrorheology steady shear oscillatory mode protonation |
| title | Electrorheology of Suspensions of Variously Protonated Polyaniline Particles under Steady and Oscillatory Shear |
| title_full | Electrorheology of Suspensions of Variously Protonated Polyaniline Particles under Steady and Oscillatory Shear |
| title_fullStr | Electrorheology of Suspensions of Variously Protonated Polyaniline Particles under Steady and Oscillatory Shear |
| title_full_unstemmed | Electrorheology of Suspensions of Variously Protonated Polyaniline Particles under Steady and Oscillatory Shear |
| title_short | Electrorheology of Suspensions of Variously Protonated Polyaniline Particles under Steady and Oscillatory Shear |
| title_sort | electrorheology of suspensions of variously protonated polyaniline particles under steady and oscillatory shear |
| topic | polyaniline electrorheology steady shear oscillatory mode protonation |
| url | https://doi.org/10.3933/applrheol-20-55371 |
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