Electromagnetic interference shielding and mechanical properties of multi-layered polyvinyl chloride/multiwall carbon nanotubes nanocomposite

2019 ◽  
Vol 9 (8) ◽  
pp. 872-881
Author(s):  
Abdullah Aljaafari ◽  
Sobhy S. Ibrahim

Electromagnetic shielding is one of the promising research areas that attract the interest of many researchers, especially researchers interested in polymer nanocomposite. In this work, the shielding efficiency and dynamic mechanical analysis for multi-layered samples are reviewed and analyzed. The multi-layered samples were prepared using two sheets of polyvinyl chloride (PVC) polymer loaded with multiwall carbon nanotubes over the electrical percolation threshold, and a MWCNTs buckypaper (MWCNTs BP) sheet between them. The three sheets were collected together by hot-press technique to form a multi-layered nanocomposite sample. The shielding efficiency of single and double layers of PVC/MWCNTs sheets loaded by 5 wt.% MWCNTs, was very weak. The new structured (3 layered/multilayered) nanocomposite samples were prepared with different weight percent of MWCNTs BP sheet (0, 1, 2, 3 and 4 wt.%). The SE values over all the frequency range (450 MHz to about 2.0 GHz) are strongly depends on the weight percent of the MWCNTs BP. Shielding efficiency increased as the MWCNTs BP weight percent increased. Decreases the elastic modulus, storage modulus and the coefficient of complex viscosity were found for a new set of samples contains 0.14, 0.27, 0.28 and 0.44 wt.% MWCNTs BP layers. This is due to the diffused MWCNTs from the mesh to polymer layers making the composite more brittle. The glass transition temperature determined from tanδ(f) increased as MWCNTs BP content increases.

RSC Advances ◽  
2016 ◽  
Vol 6 (32) ◽  
pp. 26959-26966 ◽  
Author(s):  
Suryasarathi Bose ◽  
Maya Sharma ◽  
Avanish Bharati ◽  
Paula Moldenaers ◽  
Ruth Cardinaels

Mediated by the PS-r-PMMA, the MWNTs were mostly localized at the interface and bridged the PMMA droplets. This strategy led to enhance EMI shielding effectiveness at 0.25 wt% MWNTs through multiple scattering from MWNT covered droplets.


2015 ◽  
Vol 3 (2) ◽  
pp. 656-669 ◽  
Author(s):  
Shital Patangrao Pawar ◽  
Dhruva A. Marathe ◽  
K. Pattabhi ◽  
Suryasarathi Bose

In this study, multiwall carbon nanotubes (MWNTs) were chemically grafted onto dopamine anchored iron oxide (Fe3O4) nanoparticles via diazotization reaction to design electromagnetic (EM) shielding materials based on PC (polycarbonate)/SAN [poly (styrene-co-acrylonitrile)] blends.


2015 ◽  
Vol 3 (15) ◽  
pp. 7974-7985 ◽  
Author(s):  
Goutam Prasanna Kar ◽  
Sourav Biswas ◽  
Rani Rohini ◽  
Suryasarathi Bose

Highly conducting composites were derived by selectively localizing multiwall carbon nanotubes (MWNTs) in co-continuous PVDF/ABS (50/50, wt/wt) blends.


2018 ◽  
Author(s):  
Gen Hayase

By exploiting the dispersibility and rigidity of boehmite nanofibers (BNFs) with a high aspect ratio of 4 nm in diameter and several micrometers in length, multiwall-carbon nanotubes (MWCNTs) were successfully dispersed in aqueous solutions. In these sols, the MWCNTs were dispersed at a ratio of about 5–8% relative to BNFs. Self-standing BNF–nanotube films were also obtained by filtering these dispersions and showing their functionality. These films can be expected to be applied to sensing materials.


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