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1. Polarization behaviour of paper during corona charging

Author

Sidaravicius, J., Lozovsky, T., Jurksus, J., Maldzius, R., Backfolk, K., and Sirviö, P.

Subjects
*POLARIZATION (Electricity), *CORONA discharge, *PAPER analysis, *ELECTRIC charge, *PERMITTIVITY, *ELECTRIC capacity, *ELECTROSTATICS, *HYDROGEN bonding, *HYDROXYL group
Abstract

Abstract: The polarization phenomenon of papers containing different amounts and different types of inorganic fillers during corona charging was studied using a dose-charging method. This method enables to investigate the phenomena in the conditions close to the real ones. It revealed that the paper composition affects the polarization tendency during the corona charging of paper. The filler influences the paper''s dielectric constant and hence its electrical capacitance, charging potential and polarizing electric field. It was shown that paper polarization depends mainly on the electric field and this is caused by the orientation polarization and the role of the filler origin and its concentration in the polarization was surprisingly low. Polarization temperature dependences enable to propose the paper polarization mechanism. Paper polarizability is dominated by cellulose and the moisture content in it, and the liability of cellulose and hydrogen bonds hydroxyl groups. [Copyright &y& Elsevier]

Published
2013
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2. Electrical and mechanical characterization of nanoscale-layered cellulose-based electro-active paper

Author

Jaehwan Kim, Kiju Yun, Gyu-Young Yun, and Joo-Hyung Kim

Subjects
Paper, Materials science, Field (physics), Biomedical Engineering, Bioengineering, General Chemistry, Electrochemical Techniques, Condensed Matter Physics, Electric charge, Piezoelectricity, Characterization (materials science), Amorphous solid, Ion, Electromagnetic Fields, Electric field, Microscopy, Electron, Scanning, Nanotechnology, General Materials Science, Stress, Mechanical, Composite material, Cellulose, Nanoscopic scale
Abstract

In order to understand the electro-mechanical behavior of piezoelectric electro active paper (EAPap), the converse and direct piezoelectric characterization of cellulose EAPap was studied and compared. A delay between the electrical field and the induced strain of EAPap was observed due to the inner nano-voids or the localized amorphous regions in layer-by-layered structure to capture or hold the electrical charges and remnant ions. The linear relation between electric field and induced strain is also observed. The electro-mechanical performance of EAPap is discussed in detail in this paper.

Published
2011