TY - GEN
T1 - Electric field manipulation of cellulose whiskers in polyvinyl acetate
AU - Kalidindi, Sanjay V.
AU - Ounaies, Zoubeida
AU - Kaddami, Hamid
PY - 2010
Y1 - 2010
N2 - Cellulose whiskers as inclusions have shown a lot of promise due to their potential to enhance mechanical and piezoelectric response of polymers. In addition, CWs are high aspect ratio particles; by aligning them in polymers, improved and anisotropic physical properties could be achieved. In this study, we investigate the effect of AC electric field on the alignment of CWs in a solution of PVAc and DMF. CWs were dispersed as small bundles (<10μm). Alignment and chain formation was found to be a function of electric field magnitude, frequency and time. Dielectric constant of the solutions was studied as a function of applied electric field magnitude, frequency and duration. Significant improvements in dielectric constant were observed for the aligned cases as compared to random case. Optimum properties were achieved at 100 - 200 Vpp/mm and 50 KHz for duration of 20 minutes. Future work will focus on processing thin films with individually dispersed CWs, and improving their alignment to further increase the electrical and mechanical properties.
AB - Cellulose whiskers as inclusions have shown a lot of promise due to their potential to enhance mechanical and piezoelectric response of polymers. In addition, CWs are high aspect ratio particles; by aligning them in polymers, improved and anisotropic physical properties could be achieved. In this study, we investigate the effect of AC electric field on the alignment of CWs in a solution of PVAc and DMF. CWs were dispersed as small bundles (<10μm). Alignment and chain formation was found to be a function of electric field magnitude, frequency and time. Dielectric constant of the solutions was studied as a function of applied electric field magnitude, frequency and duration. Significant improvements in dielectric constant were observed for the aligned cases as compared to random case. Optimum properties were achieved at 100 - 200 Vpp/mm and 50 KHz for duration of 20 minutes. Future work will focus on processing thin films with individually dispersed CWs, and improving their alignment to further increase the electrical and mechanical properties.
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U2 - 10.1115/smasis2010-3882
DO - 10.1115/smasis2010-3882
M3 - Conference contribution
AN - SCOPUS:84859528322
SN - 9780791844168
T3 - ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2010
SP - 233
EP - 238
BT - ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2010
PB - American Society of Mechanical Engineers
T2 - ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2010
Y2 - 28 September 2010 through 1 October 2010
ER -