Thumbnail
Access Restriction
Open

Author Lamberti, Patrizia ♦ Spinelli, Giovanni ♦ Tucci, Vincenzo ♦ Guadagno, Liberata ♦ Raimondo, Marialuigia ♦ Vertuccio, Luigi
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NANOSCIENCE AND NANOTECHNOLOGY ♦ AMINES ♦ COMPATIBILITY ♦ ELECTRIC CONDUCTIVITY ♦ ELECTRON SCANNING ♦ EPOXIDES ♦ FILLERS ♦ GRAPHITE ♦ INTERFERENCE ♦ NANOCOMPOSITES ♦ RADAR ♦ SCANNING ELECTRON MICROSCOPY ♦ TWO-DIMENSIONAL CALCULATIONS ♦ TWO-DIMENSIONAL SYSTEMS ♦ X-RAY DIFFRACTION
Abstract An experimental study has been carried out to prepare and characterize epoxy/amine-based composites filled with different percentages of partially exfoliated graphite (i.e. pEG) particles having an exfoliation degree of 56% in order to analyze the effect of the filler amounts on the electrical properties of the resulting nanocomposites. Moreover, in order to fully investigate the direct relationship between the physical properties of the employed filler and the results of the electrical characterization, a structural and morphological characterization of the pEG samples is carried out by means of various type of analysis such as X-ray diffraction patterns, micro-Raman and Scanning Electron Microscopy (SEM) images. The DC electrical characterization reveals a percolation thresholds (EPT) that falls in the range [2–3] wt% and an electrical conductivity of about 0.66 S/m at the highest filler loading (6.5 wt%). From the analysis of the percolative curve it is possible to derive the percolation law parameters and in particular the critical exponent t, whose value (i.e. 1.2) reflects an effective 2D organization of the percolating structure consistent with the type of filler used (2-dimensional). Finally, an extensive analysis concerning the electrical properties in the frequency domain has been carried out in order to evaluate the effectiveness of pEG-loaded composites in terms of electromagnetic interference compatibility (EMC) and their applicability as radar absorbers materials (RAMs).
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-05-18
Publisher Place United States
Volume Number 1736
Issue Number 1


Open content in new tab

   Open content in new tab