Graphene and MWCNT Printed Films: Preparation and RF Electrical Properties Study

Abstract

Carbon materials are well known for being a versatile class of materials able to transmit an electrical signal when used as fillers in composites. Among numerous carbon fillers, carbon nanotubes and graphene have been extensively investigated for the last thirty years. This paper compares graphene and carbon nanotube electrical (i.e., resistive and reactive) properties in the microwave range up to 3 GHz. The transmission and reflection parameters of both the microstrip transmission lines and patch antennas loaded with 33 wt.% of graphene and multiwalled carbon nanotubes (MWCNTs) were analyzed. Interestingly, for an identical composite matrix composition, different scattering parameters stemmed from the different morphology of the films, the diverse interactions between the graphene nanoplatelets, MWCNTs, and polymeric binders in conjunction with the intrinsic electrical characteristics of the two carbon materials.

Preparation and Characterization of Polyvinylpyrrolidone/Multi-walled Carbon Nanotubes Nanocomposite hybrid with Graphene

“…By comparing the optical energy gap values of PVP-MWCNT and PVP-MWCNT-Gr nanocomposite with that of the pure samples, a shift towards long wavelengths can be noticed. This can be attributed to the π-π* transition which is found in MWCNT and Gr, which agree with our previous work Estabraq et al [13]. Figure 6 shows the relation between (h) 2 and h (which are called Mott plots) for all samples.…”

“…The effect of Gr and MWCNT hybrid system on the polymeric composites has been investigated. The results shows an enhancement in the mechanical, electrical, thermal and optical properties comparing to their use individually [11][12][13].…”

A Study on Machining Performances of Micro-Drilling of Multi-Directional Carbon Fiber Reinforced Plastic (MD-CFRP) Based on Nano-Solid Dry Lubrication Using Graphene NanoPlatelets

“…When comparing the I 2D /I G of xGnPs, the values less than 1 was confirmed, which means the multi-layer graphene (graphite). In addition, the asymmetry of the 2D bands was confirmed in the large xGnPs (xGnP M-5 and xGnP H-5) compared to smaller one (xGnP C-750) [ 22 , 23 , 24 , 25 ].…”

Wearable Textile UHF-RFID Sensors: A Systematic Review

“…The general conductive ink is a metal-filled paste with a solid content of a certain percentage, for which the curing process under a required temperature by the screen machine is necessarily performed after the ink is pressed. Although the screen printing technique was invented in ancient China, this technique has been systematically developed in the last 20 years and is employed for the design of robust non-bendable chemical sensors [ 28 ], electrochromic materials [ 29 ], and non-bendable UHF-RFIDs [ 30 ]. However, the invention of conductive compositions for textile printing, described by Ujiie in 2006 [ 31 ] that was further developed by Cie in 2015 [ 32 ] opens the door for utilization of screen printing in flexible electronics.…”