Effect of Polymer Matrix in Polymer/trGO Nano-Composite for EMI Shielding Application in Microwave and Infrared Region

2021 ◽  
Vol 875 ◽  
pp. 153-159
Author(s):  
Khadija Zubair ◽  
Muhammad Fayzan Shakir
Keyword(s):  
Composite Films ◽  
Acrylonitrile Butadiene Styrene ◽  
Infrared Region ◽  
Network Analyzer ◽  
Shielding Effectiveness ◽  
Interconnected Network ◽  
Emi Shielding ◽  
Nano Composite ◽  
Reduced Graphene ◽  
Butadiene Styrene

Thermally reduced graphene oxide (trGO) was successfully prepared and confirmed by XRD then dispersed in polystyrene (PS) and Acrylonitrile-Butadiene-Styrene (ABS) polymers and evaluated for EMI shielding in microwave and infrared (IR) region. Thickness of prepared polymer/trGO composite films were 200-250 micron. It was observed that trGO has more compatibility with PS then ABS and dispersed more easily and uniformly in PS than ABS. This effect was also observed in IR shielding as ABS+15trGO have 3% transmission and PS+1% trGO have 1.5% transmission. Maximum 29 dB and 25 dB shielding effectiveness was measured by vector network analyzer (VNA) in microwave region (9-18 GHz) of PS+2% trGO and ABS+2% trGo composite respectively. These results clearly indicating that trGO is more compatible with PS than ABS and form more stable and mature interconnected network structure in PS at lower concentrations.

scholarly journals Robust Design of PC/ABS Filled with Nano Carbon Black for Electromagnetic Shielding Effectiveness and Surface Resistivity

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 616
Author(s):  
Wipoo Sriseubsai ◽  
Arsarin Tippayakraisorn ◽  
Jun Wei Lim
Keyword(s):  
Carbon Black ◽  
Electromagnetic Interference ◽  
Electrostatic Discharge ◽  
Acrylonitrile Butadiene Styrene ◽  
Surface Resistivity ◽  
Shielding Effectiveness ◽  
Electromagnetic Interference Shielding Effectiveness ◽  
Electromagnetic Shielding Effectiveness ◽  
Emi Se ◽  
Butadiene Styrene

This study focuses on the electromagnetic interference shielding effectiveness (EMI SE), dissipation of electrostatic discharge (ESD), and surface resistivity of polymer blends between polycarbonate (PC) and acrylonitrile–butadiene–styrene (ABS) filled with carbon black powder (CBp) and carbon black masterbatch (CBm). The mixtures of PC/ABS/CB composites were prepared by the injection molding for the 4-mm thickness of the specimen. The D-optimal mixture design was applied in this experiment. The EMI SE was measured at the frequency of 800 and 900 MHz with a network analyzer, MIL-STD-285. The result showed that the EMI SE was increased when the amount of filler increased. The surface resistivity of the composites was determined according to the ASTM D257. It was found that the surface resistivity of the plastic with no additives was 1012 Ω/ square. When the amount of fillers was added, the surface resistivity of plastic composites decreased to the range of 106–1011 Ω/square, which was suitable for the application without the electrostatic discharge. The optimization of multi-response showed using high amounts of PC and CB was the best mixture of this research.

EMI Shielding Properties of Polymer Blend with the Inclusion of Graphene Nano Platelets

2021 ◽  
Vol 875 ◽  
pp. 160-167
Author(s):  
Muhammad Fayzan Shakir ◽  
Asra Tariq
Keyword(s):  
Electromagnetic Interference ◽  
Coaxial Cable ◽  
Network Analyzer ◽  
Shielding Effectiveness ◽  
Emi Shielding ◽  
Electrically Conductive ◽  
Emi Shielding Effectiveness ◽  
Increasing Trend ◽  
Shielding Properties ◽  
Basic Prediction

Polymer nano composites based on poly vinyl chloride matrix were fabricated using polyaniline (PANI) and graphene nano platelets (GNP) as electrically conductive nano filler for the application of electromagnetic interference (EMI) shielding. DC conductivity was first evaluated by using cyclic voltammetry and found an increasing trend of electrical conductivity as PANI and GNP was added in PVC matrix that confirms the formation of electrically conductive network structure. Dielectric properties like dielectric constant, dielectric loss and AC conductivity were evaluated in frequency range of 100 Hz to 3 MHz that gives basic prediction for EMI shielding effectiveness. Vector Network Analyzer (VNA) was used to assess EMI shielding properties using coaxial cable method in 11GHz to 20GHz range and it was found that a maximum of 29 dB shielding was archived with the incorporation of 15 wt% of PANI in PVC. This value increased to 56 dB as 5 wt% GNP added in PVC/PANI 15 wt% blend. Interaction of matrix with filler, nature of filler and dispersion of filler in matrix are the key parameters for achieving high shielding effectiveness.

Electromagnetic interference shielding study in microwave and NIR regions by highly efficient Ag/ZnS and polyaniline-Ag/ZnS particles

2021 ◽  
pp. 089270572110649
Author(s):  
Muhammad Zahid ◽  
HM Fayzan Shakir ◽  
Zulfiqar Ahmad Rehan
Keyword(s):  
Electromagnetic Interference ◽  
Near Infrared ◽  
Oxidative Polymerization ◽  
Composite Films ◽  
Nir Spectroscopy ◽  
Infrared Region ◽  
Nanocomposite Films ◽  
Emi Shielding ◽  
Zns Nanoparticles ◽  
Co Precipitation

The chemical oxidative polymerization and co-precipitation methods were employed for the preparations of polyaniline (PANI) and silver-doped zinc sulfide (ZnS) nanoparticles to be used for electromagnetic interference (EMI) shielding. PVC-based composite films were fabricated by the incorporation of Ag/ZnS and PANI-Ag/ZnS nanoparticles. These nanoparticles were first analyzed by X-ray diffraction and zetasizer for their crystal structure and particle size. Prepared nanocomposite films were then analyzed for various properties like electrical conductivity, transmission in the near-infrared region (700 nm to 2500 nm), and EMI shielding efficiency in the microwave region (0.1 GHz to 20 GHz). These parameters were characterized by DC Conductivity, NIR spectroscopy, and vector network analyzer. It was found that with the addition of the concentration of nanoparticles, both values of conductivity and shielding efficiency improved. The highest attenuation value in 0.1 to 20 GHz reached 52.5 dB in 0.1 to 20 GHz frequency for 20 wt% PANI-Ag/ZnS and < 0.5% transmission was evaluated in the NIR region.

Fabrication and characterization of organic semiconductor for electromagnetic interference shielding material

2011 ◽  
Vol 31 (4) ◽  
Author(s):  
Habibun Nabi Muhammad Ekramul Mahmud ◽  
Anuar Kassim
Keyword(s):  
Conducting Polymer ◽  
Polymer Composite ◽  
Indium Tin Oxide ◽  
Electromagnetic Interference ◽  
Composite Films ◽  
Oxide Glass ◽  
Poly Vinyl Alcohol ◽  
Shielding Effectiveness ◽  
Emi Shielding ◽  
Shielding Material

Abstract Conducting polymer films produced by electropolymerization technique are highly conductive, simple, and suitable for use especially in electronic devices. An attempt has been made to produce polypyrrole-poly(vinyl alcohol) (PPy-PVA) conducting polymer composite films using 0.1 m p-toluene sulfonate dopant at a potential of 1.2 V (vs. standard calomel electrode) on indium tin oxide glass electrode. The potential application of the prepared PPy-PVA conducting polymer composite films as an electromagnetic interference (EMI) shielding material has been investigated in the present study. The EMI shielding effectiveness of PPy-PVA composite films prepared from different experimental conditions was analyzed in the microwave frequency range of 8–12 GHz. The shielding effectiveness of 45.67–35.7 dB has been demonstrated by PPy-PVA conducting polymer composite films, which appears to be very attractive in any EMI shielding applications where a minimum shielding effectiveness of 35 dB is required.

Enhancement of Mechanical Properties of ABS/PC-HNT Nano Composites

2018 ◽  
Vol 24 (8) ◽  
pp. 6000-6003
Author(s):  
Y. Narendra Babu ◽  
M. Venkateswara Rao ◽  
A. Gopala Krishna
Keyword(s):  
Mechanical Properties ◽  
Matrix Material ◽  
Acrylonitrile Butadiene Styrene ◽  
Halloysite Nanotubes ◽  
Mechanical Tests ◽  
Screw Extruder ◽  
Nano Composite ◽  
Melt Compounding ◽  
Twin Screw ◽  
Butadiene Styrene

The objective of this paper is to experimentally study tensile strength, Impact strength, Flexural strength and Wear Characteristics of the Nano tubular material Halloysite Nanotubes (HNT) into ABS/PC blend with ABS and PC compositions in the ratio 40/60. We have fabricated the Thermoplastic Nanocomposites specimens as per ASTM standards, with the Acrylonitrile Butadiene Styrene (ABS) and Polycarbonate (PC) blend as matrix material and with 1%, 2%, 3%, 4%, 5% and 6% HNT reinforcement material using Co–Rotating Intermeshing Twin Screw Extruder by Melt Compounding. Mechanical Tests were conducted and results were compared with the original ABS/PC blend. Effects of Halloysite Nanotubes reinforcement percentage were discussed in detail. The obtained results suggested that ABS/PC (40/60) blend with 4% reinforcement of Halloysite Nanotubes executed better mechanical properties. SEM is used to study the failure mechanism of the proposed Nano composite.

Electrical Conductivity and Electromagnetic Shielding Effectiveness of CB/ABS Composites

2011 ◽  
Vol 675-677 ◽  
pp. 461-463
Author(s):  
Hai Ping Duan ◽  
Yu Ping Duan
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Mass Fraction ◽  
Acrylonitrile Butadiene Styrene ◽  
Volume Resistivity ◽  
Electromagnetic Shielding ◽  
Shielding Effectiveness ◽  
Percolation Effect ◽  
Electromagnetic Shielding Effectiveness ◽  
Butadiene Styrene

In this paper, the effects of carbon black (CB) mass fraction on volume resistivity and electromagnetic shielding effectiveness (SE) of CB/Acrylonitrile Butadiene Styrene (ABS) composites were studied. The results indicated that when CB mass fraction was over 15 wt%, the volume resistivity dropped sharply and when it rose to 35 wt%, the volume resistivity achieved the lowest value about 103Ω·cm. In addition, there are two obvious percolation effect at 15~20 wt% and 25~35 wt% CB respectively in the course of the volume resistivity changing. Titanate coupling agent could greatly improve conduction and SE of CB/ABS composites. Lastly, the SE of CB/ABS composites was investigated by experimental observation.

Sign in / Sign up

Export Citation Format

Share Document