scholarly journals Carbon Nanotube Embedded Multi-Functional Polymer Nanocomposites

10.5772/50485 ◽  
2012 ◽  
Author(s):  
Jeong Hyun ◽  
Sung Min ◽  
Il Jun ◽  
Jong Won ◽  
Young Hwa ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Polymer Nanocomposites ◽  
Functional Polymer

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.

Interaction Stresses in Carbon Nanotube–Polymer Nanocomposites

2011 ◽  
Vol 3 (9) ◽  
pp. 3425-3431 ◽  
Author(s):  
Meysam Rahmat ◽  
Kaushik Das ◽  
Pascal Hubert
Keyword(s):  
Carbon Nanotube ◽  
Polymer Nanocomposites

Functional Polymer Nanocomposites Enhanced by Nanorods

2013 ◽  
Vol 47 (3) ◽  
pp. 875-887 ◽  
Author(s):  
Michael J. A. Hore ◽  
Russell J. Composto
Keyword(s):  
Polymer Nanocomposites ◽  
Functional Polymer

Graphene and MWCNT based bi-functional polymer nanocomposites with enhanced microwave absorption and supercapacitor property

2015 ◽  
Vol 66 ◽  
pp. 200-212 ◽  
Author(s):  
Pallab Bhattacharya ◽  
Saptarshi Dhibar ◽  
Mrinal Kanti Kundu ◽  
Goutam Hatui ◽  
Chapal K. Das
Keyword(s):  
Microwave Absorption ◽  
Polymer Nanocomposites ◽  
Functional Polymer

A Carbon Nanotubes Aggregation in Polymer Nanocomposites

2018 ◽  
Vol 935 ◽  
pp. 55-60 ◽  
Author(s):  
Louise B. Atlukhanova ◽  
George V. Kozlov
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Polymer Nanocomposites ◽  
Packing Density ◽  
Elasticity Modulus ◽  
Aggregation Process ◽  
Walk Dimension

Carbon nanotubes aggregation process in aggregates (bundles) has been studied. This process results in essential reduction of nanocomposites attainable elasticity modulus. The bundles packing density is defined by aggregation expectation time and corresponding carbon nanotube walk dimension up to sticking with a similar nanotube.

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