Effect of dopants ion on piezo-response in polyaniline-poly(vinylidine fluoride) blends
Metadata of CSIR Papers
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| Title |
Effect of dopants ion on piezo-response in polyaniline-poly(vinylidine fluoride) blends
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| Creator |
Radhakrishnan, S
Kar, SB |
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| Subject |
Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics
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| Description |
Electromechanical sensors and actuators are important for robotic and aerospace applications. Amongst various material, poly(vinylidene fluoride) or its co-polymers are known to exhibit high piezosensitivity. However, due to their higher electrical resistivity the input impedance of subsequent signal processing circuits is required to be very high. A novel technique to decrease the impedance would be blending PVDF with conducting polyaniline (PANI) but without affecting the piezosensitivity of PVDF. Polyaniline (PANI) was synthesized by well known standard chemical route using dopants HCl and dodecyl benzene sulfonic acid (DBSA). These PANI powder were blended with PVDF(solef) which was first dissolved in DMAc at 50 degreesC to which were added requisite amounts of two types of PANI ranging. from 2 to 25 wt %, stirred for 24 hrs to form a homogeneous mixture which was cast in glass petri-dish, followed by complete solvent evaporation at 50 degreesC and then drying under vacuum for 24 hr to give films (30 mum thick) of PANI-PVDF blends. The piezo-sensitivity of these blends was measured before and after poling in electrical field ( 25KV/cm for 90 min.). The sensitivity factor was dependent on the composition, type of dopant as well as the electric polarization of the blend. The HCl doped PANI blends (10-15%) in PVDF were highly piezo- sensitive than other blend compositions. These various results have been explained on the basis of compatibility, discrete domain formation, nonlinear conduction process for charge transport, orientation of dipoles, and trapping of space charge at inter-domain sites.
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| Publisher |
SPIE-INT SOC OPTICAL ENGINEERINGBELLINGHAM1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
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| Date |
2011-09-24T09:36:44Z
2011-09-24T09:36:44Z 2002 |
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| Type |
Proceedings Paper
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| Identifier |
SMART MATERIALS II
0-8194-4729-3 0277-786X http://hdl.handle.net/123456789/24177 |
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| Language |
English
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