Tuning Polymer Nanocomposite Morphology: AC Electric Field Manipulation of Epoxy–Montmorillonite (Clay) Suspensions

2004 ◽  
Vol 16 (4) ◽  
pp. 297-302 ◽  
Author(s):  
H. Koerner ◽  
J. D. Jacobs ◽  
D. W. Tomlin ◽  
J. D. Busbee ◽  
R. A. Vaia
Keyword(s):  
Electric Field ◽  
Polymer Nanocomposite ◽  
Montmorillonite Clay ◽  
Ac Electric Field ◽  
Clay Suspensions ◽  
Field Manipulation

Electric Field Manipulation of Cellulose Whiskers in Polyvinyl Acetate

2010 ◽  
Author(s):  
Sanjay V. Kalidindi ◽  
Zoubeida Ounaies ◽  
Hamid Kaddami
Keyword(s):  
Dielectric Constant ◽  
Electric Field ◽  
Polyvinyl Acetate ◽  
Piezoelectric Response ◽  
Electric Field Magnitude ◽  
Field Magnitude ◽  
Cellulose Whiskers ◽  
Ac Electric Field ◽  
Future Work ◽  
Field Manipulation

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.

Simulation of TiO 2 particle trajectory in AC electric field

2015 ◽  
Vol 108 ◽  
pp. 183-191 ◽  
Author(s):  
Reza Riahifar ◽  
Babak Raissi ◽  
Cyrus Zamani ◽  
Ehsan Marzbanrad
Keyword(s):  
Electric Field ◽  
Particle Trajectory ◽  
Ac Electric Field

Electrically induced reversible viscosity change in hectorite aqueous dispersion under an AC electric field

2014 ◽  
Vol 99 ◽  
pp. 160-163 ◽  
Author(s):  
Hiroshi Kimura ◽  
Mao Ueno ◽  
Shinya Takahashi ◽  
Akira Tsuchida ◽  
Keiichi Kurosaka
Keyword(s):  
Electric Field ◽  
Aqueous Dispersion ◽  
Viscosity Change ◽  
Ac Electric Field

Mechanism of Cell Lysis in Microfluidic Channel With Integrated Nanocomposite Electrodes

2013 ◽  
Author(s):  
Madhusmita Mishra ◽  
Anil Krishna Koduri ◽  
Aman Chandra ◽  
D. Roy Mahapatra ◽  
G. M. Hegde
Keyword(s):  
Electric Field ◽  
Microfluidic Channel ◽  
Cell Lysis ◽  
Bacterial Cells ◽  
Nano Composite ◽  
Time Resolved ◽  
Ac Electric Field ◽  
Cell Dispersion ◽  
Electrical Lysis ◽  
Nanocomposite Electrodes

This paper reports on the characterization of an integrated micro-fluidic platform for controlled electrical lysis of biological cells and subsequent extraction of intracellular biomolecules. The proposed methodology is capable of high throughput electrical cell lysis facilitated by nano-composite coated electrodes. The nano-composites are synthesized using Carbon Nanotube and ZnO nanorod dispersion in polymer. Bacterial cells are used to demonstrate the lysis performance of these nanocomposite electrodes. Investigation of electrical lysis in the microchannel is carried out under different parameters, one with continuous DC application and the other under DC biased AC electric field. Lysis in DC field is dependent on optimal field strength and governed by the cell type. By introducing the AC electrical field, the electrokinetics is controlled to prevent cell clogging in the micro-channel and ensure uniform cell dispersion and lysis. Lysis mechanism is analyzed with time-resolved fluorescence imaging which reveal the time scale of electrical lysis and explain the dynamic behavior of GFP-expressing E. coli cells under the electric field induced by nanocomposite electrodes. The DNA and protein samples extracted after lysis are compared with those obtained from a conventional chemical lysis method by using a UV–Visible spectroscopy and fluorimetry. The paper also focuses on the mechanistic understanding of the nano-composite coating material and the film thickness on the leakage charge densities which lead to differential lysis efficiency.

Deformation of liquid crystal droplets under the action of an external ac electric field

2001 ◽  
Vol 64 (2) ◽  
Author(s):  
B. I. Lev ◽  
V. G. Nazarenko ◽  
A. B. Nych ◽  
D. Schur ◽  
P. M. Tomchuk ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Ac Electric Field
Sign in / Sign up

Export Citation Format

Share Document