ENHANCEMENT OF THE SURFACE DIELECTRIC AND PHOTODIELECTRIC PROPERTIES OF LOW DENSITY POLYETHYLENE BY ADDING EMODIN

Authors

  • Blanka Škipina Faculty of Technology, University of Banja Luka, Vojvode Stepe Stepanovića 73, Banja Luka, Bosnia and Herzegovina
  • Zoran Kukrić Faculty of Technology, University of Banja Luka, Vojvode Stepe Stepanovića 73, Banja Luka, Bosnia and Herzegovina
  • Mirjana Milošević Faculty of Technology, University of Banja Luka, Vojvode Stepe Stepanovića 73, Banja Luka, Bosnia and Herzegovina
  • Adriaan S. Luyt Center for Advanced Materials, Qatar University, Doha, Qatar
  • Duško Dudić Vinca Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12−14, Belgrade, Serbia

Abstract

In this paper, we report surface dielectric and photodielectric properties of
low density polyethylene (LDPE)/Emodin composite. Emodin was extracted from Fallopia
japonica plant. The composite was obtained from the xylene solution. Dielectric measurements
were performed in the frequency range from 240 Hz to 4 kHz and the temperature
range from 20 °C – 70 °C. Irradiations of the sample were applied before and during measurement
with selected wavelengths from UV to the visible range. Surface dielectric conductance
and susceptance of the LDPE/Emodin composite is higher then value of conductance
and susceptance of pure LDPE. We found an increase, by one order of magnitude, in
conductance and susceptance of the LDPE/Emodin composite with increase of measurement
frequency. Furthermore, the surface conductance and susceptance increase due to UV
radiation in mentioned temperature range, but during visible radiation at frequency 1 kHz
(except in the case green LED lamp) we observed the enhance of conductance only at temperature
range up to 50 °C.

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Published

2021-10-26

Issue

Vol. 9 No. 1 (2018): Contemporary Materials IX-1

Section

Articles