Influence of coordination complexes of transition metals on EMI-shielding properties and permeability of polymer blend/carbon nanotube/nickel composites

2020 ◽  
Vol 200 ◽  
pp. 108420 ◽  
Author(s):  
Nataly Kozak ◽  
Lyudmila Matzui ◽  
Lyudmila Vovchenko ◽  
Lyudmila Kosyanchuk ◽  
Victor Oliynyk ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Transition Metals ◽  
Polymer Blend ◽  
Coordination Complexes ◽  
Emi Shielding ◽  
Complexes Of Transition Metals ◽  
Shielding Properties ◽  
Nickel Composites

Lightweight flexible carbon nanotube/polyaniline films with outstanding EMI shielding properties

2017 ◽  
Vol 5 (34) ◽  
pp. 8694-8698 ◽  
Author(s):  
Hui Li ◽  
Xuehong Lu ◽  
Du Yuan ◽  
Jiaotong Sun ◽  
Fuat Erden ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Shielding Effectiveness ◽  
Emi Shielding ◽  
Polyaniline Films ◽  
Shielding Properties

Flexible and highly conductive CNT/PANI films were developed for EMI shielding applications, which exhibited the highest specific shielding effectiveness among those reported.

scholarly journals Improved Electromagnetic Interference Shielding Properties Through the Use of Segregate Carbon Nanotube Networks

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1395 ◽  
Author(s):  
Sung-Hoon Park ◽  
Ji-Hwan Ha
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Electromagnetic Interference ◽  
Silica Particles ◽  
Excluded Volume ◽  
Emi Shielding ◽  
Excluded Volume Effects ◽  
Content Ratio ◽  
Shielding Properties ◽  
Micro Silica

We report the enhanced electromagnetic interference (EMI) shielding properties of hybrid carbon nanotube (CNT) composites consisting of more than two kinds of fillers through the use of segregate conducting networks. An excluded volume was created by micro-sized silica particles that concentrate the CNT network, resulting in improved electrical conductivity and microwave properties. To achieve the optimal dispersion of CNTs and silica particles, high shear force was applied to the pre-cured composite mixture via three-roll milling. Depending on the micro-silica content ratio, we observed improved electrical conductivity and EMI shielding properties. For a quantitative comparison to observe the excluded-volume effects, a CNT composite without micro-silica was measured in parallel with the other sample.

scholarly journals Coordination Complexes of Transition Metals (M = Mo, Fe, Rh, and Ru) with Tin(II) Phthalocyanine in Neutral, Monoanionic, and Dianionic States

2016 ◽  
Vol 55 (4) ◽  
pp. 1390-1402 ◽  
Author(s):  
Dmitri V. Konarev ◽  
Alexey V. Kuzmin ◽  
Yoshiaki Nakano ◽  
Maxim A. Faraonov ◽  
Salavat S. Khasanov ◽  
...  
Keyword(s):  
Transition Metals ◽  
Coordination Complexes ◽  
Complexes Of Transition Metals

Dual percolations of electrical conductivity and electromagnetic interference shielding in progressively agglomerated CNT/polymer nanocomposites

2021 ◽  
pp. 108128652110214
Author(s):  
Xiaodong Xia ◽  
George J. Weng
Keyword(s):  
Experimental Data ◽  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Percolation Threshold ◽  
Polymer Nanocomposites ◽  
Electromagnetic Interference ◽  
Effective Medium Theory ◽  
Scale Model ◽  
Shielding Effectiveness ◽  
Emi Shielding

Recent experiments have revealed two distinct percolation phenomena in carbon nanotube (CNT)/polymer nanocomposites: one is associated with the electrical conductivity and the other is with the electromagnetic interference (EMI) shielding. At present, however, no theories seem to exist that can simultaneously predict their percolation thresholds and the associated conductivity and EMI curves. In this work, we present an effective-medium theory with electrical and magnetic interface effects to calculate the overall conductivity of a generally agglomerated nanocomposite and invoke a solution to Maxwell’s equations to calculate the EMI shielding effectiveness. In this process, two complex quantities, the complex electrical conductivity and complex magnetic permeability, are adopted as the homogenization parameters, and a two-scale model with CNT-rich and CNT-poor regions is utilized to depict the progressive formation of CNT agglomeration. We demonstrated that there is indeed a clear existence of two separate percolative behaviors and showed that, consistent with the experimental data of poly-L-lactic acid (PLLA)/multi-walled carbon nanotube (MWCNT) nanocomposites, the electrical percolation threshold is lower than the EMI shielding percolation threshold. The predicted conductivity and EMI shielding curves are also in close agreement with experimental data. We further disclosed that the percolative behavior of EMI shielding in the overall CNT/polymer nanocomposite can be illustrated by the establishment of connective filler networks in the CNT-poor region. It is believed that the present research can provide directions for the design of CNT/polymer nanocomposites in the EMI shielding components.

scholarly journals Enhanced thermo-mechanical, thermal and EMI shielding properties of MWNT/MAgPP/PP nanocomposites prepared by extrusion

2021 ◽  
Vol 4 ◽  
pp. 100086
Author(s):  
Rajesh Kumar Bheema ◽  
Kiran Kumar Vuba ◽  
Nagabhushan Etakula ◽  
Krishna C Etika
Keyword(s):  
Emi Shielding ◽  
Shielding Properties
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