Effects of hybrid fillers on the electrical conductivity and EMI shielding efficiency of polypropylene/conductive filler composites

Park, Dong Hyup; Lee, Yun Kyun; Park, Sang Sun; Lee, Choon Soo; Kim, Sung Hyun; Kim, Woo Nyon

doi:10.1007/s13233-013-1104-8

Cited by 63 publications

(28 citation statements)

References 28 publications

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“…An EMI SE value of 40 dB is considered as the critical value for electronic materials to shield EMI waves since it indicates that more than 99% of the EM waves are being blocked . However, it has been reported that achieving this 40 dB mark with a single conducting filler has proven to be a bottleneck in the case of polymer based composites . During this work an EMI SE value above 40 dB is attained for 20 wt% PP/MWCNT composite for a wide range of EM wave frequency (S, X, and Ku bands).…”

Section: Resultsmentioning

confidence: 88%

Morphological, dielectric, tunable electromagnetic interference shielding and thermal characteristics of multiwalled carbon nanotube incorporated polymer nanocomposites: A facile, environmentally benign and cost effective approach realized via polymer latex/waterborne polymer as matrix

et al. 2017

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Recent years have witnessed an increased interest in the designing of composite materials in an uncomplicated and economical route for electromagnetic interference (EMI) shielding applications. Herein we report a simple; user friendly and cost effective method comprising of aqueous emulsion of polypropylene (PP) being used as the polymer matrix to manufacture uniformly and efficiently dispersed multiwalled carbon nanotube (MWCNT) incorporated PP composites with excellent electrical conductivity and EMI shielding potential; making use of non‐conventional fabrication techniques. Scanning electron microscopy (SEM) and field emission SEM (FE‐SEM) analysis revealed the uniform distribution of MWCNT's throughout the PP matrix. The dielectric constant and ac conductivity of the 20 wt% MWCNT incorporated sample showcased few order magnitude increment with the ac conductivity reaching as high as ∼66 S/m. Exemplary EMI shielding effectiveness (EMI SE) of ∼57 dB (S band), ∼47 dB (X band), and ∼44 dB (Ku band) was achieved during this study over a broad range of microwave frequency. The composites illustrated marginally improved thermal stability compared to that of neat PP; and the onset crystallization and crystallization temperatures increased with increasing MWCNT concentration. This simple process can be utilized to prepare fine tuned composites/blends of polypropylene with nanofillers/incompatible polymers easily and effectively. Present work also suggests that designing polymer composites based on matrices dispersed in aqueous media is a promising approach to prepare nanocomposites with high filler loading and tunable properties. POLYM. COMPOS., 39:E1169–E1183, 2018. © 2017 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 88%

Morphological, dielectric, tunable electromagnetic interference shielding and thermal characteristics of multiwalled carbon nanotube incorporated polymer nanocomposites: A facile, environmentally benign and cost effective approach realized via polymer latex/waterborne polymer as matrix

et al. 2017

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“…These includes the utilization of hybrid conductive fillers with different types, sizes, and/or shapes as well as using immiscible polymer blends. Park et al [11] investigated the effect of hybrid fillers on the electrical conductivity of the polypropylene (PP) composite. In their investigation, the inclusion of both MWCNT and carbon fiber in the PP matrix led to better conductivity than the case filled with only carbon fiber.…”

Section: Introductionmentioning

confidence: 99%

High Density Polyethylene/Carbon Nanotube Nanocomposite Foams: Electrical Conductivity And Percolation Threshold

Hoang¹,

Aghelinejad²,

Leung³

et al. 2018

Progress in Canadian Mechanical Engineering

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Electrically conductive polymer/carbon nanotube nanocomposites have drawn attention for a wide range of applications because of their light weight, good chemical resistance, ease of processing, and tunable multifunctional properties. High density polyethylene (HDPE)/multiwalled carbon nanotube (MWCNT) nanocomposites and their foams were fabricated, and their electrical properties were explored in this research. Parametric studies were conducted to investigate the effects of initial MWCNT loading and processing conditions on the foaming behaviors of HDPE/MWCNT nanocomposites. Experimental results revealed that both the initial MWCNT loading and foam morphology were governing factors to tune the electrical conductivity and the percolation threshold of HDPE/MWCNT nanocomposites.

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“…Polymer composites and metallic materials are by far the most common candidates for EMI shielding materials [5]. A number of researches [6,7,8] focus on using polymer composites loaded with conductive fillers, fibers, nanotubes and/or dispersing particles. Those approaches, however, have drawbacks, namely: difficult processing, non-recyclability and high cost.…”

Section: Introductionmentioning

confidence: 99%

Effects of Carbonization Temperature and Component Ratio on Electromagnetic Interference Shielding Effectiveness of Woodceramics

Tao

2016

Materials

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Woodceramics were fabricated in a vacuum through carbonization of wood powder impregnated with phenol formaldehyde (PF) resin. The effects of carbonization temperature and mass ratio of wood/resin on electromagnetic interference (EMI) shielding effectiveness (SE) and morphology of woodceramics were explored. The PF resin made wood cell walls have the characteristics of glassy carbon. Wood axial tracheid and ray cells were filled with more glassy carbon by increasing addition of PF resin. Moreover, the increase of carbonization temperature was beneficial to improving SE. Woodceramics (mass ratio 1:1) obtained at 1000 °C presented a medium SE level between 30 MHz and 1.5 GHz.

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Effects of hybrid fillers on the electrical conductivity and EMI shielding efficiency of polypropylene/conductive filler composites

Cited by 63 publications

References 28 publications

Morphological, dielectric, tunable electromagnetic interference shielding and thermal characteristics of multiwalled carbon nanotube incorporated polymer nanocomposites: A facile, environmentally benign and cost effective approach realized via polymer latex/waterborne polymer as matrix

Morphological, dielectric, tunable electromagnetic interference shielding and thermal characteristics of multiwalled carbon nanotube incorporated polymer nanocomposites: A facile, environmentally benign and cost effective approach realized via polymer latex/waterborne polymer as matrix

High Density Polyethylene/Carbon Nanotube Nanocomposite Foams: Electrical Conductivity And Percolation Threshold

Effects of Carbonization Temperature and Component Ratio on Electromagnetic Interference Shielding Effectiveness of Woodceramics

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