Electromagnetic interference shielding efficiency of polyaniline mixtures and multilayer films

Lee, C.Y.; Song, Hebok; Jang, Kwan Sik; Oh, Eun Joo; Epstein, Arthur J.; Joo, Jin

doi:10.1016/s0379-6779(98)00234-3

Cited by 175 publications

(79 citation statements)

References 7 publications

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“…The increase of thickness of the middle veneer would result in an increase in this loss. Similar phenomenon have also been found by Lee et al [22], who concluded that the SE increased slowly with the increase of the thickness of L-layer (low conductive layer) in an H (high conductive layer)-L-H multilayer structure. The results found by Ramadin et al [23] showed that the SE of the spaced materials with 30 mm between two epoxy-carbon fiber fabrics was greater than those with 0 mm, 10 mm, and 20 mm spacing.…”

Section: Plywood Composites Laminated With Veneer Of Different Thicknsupporting

confidence: 88%

Process and Structure of Electromagnetic Shielding Plywood Composite Laminated with Carbon Fiber Paper

Yuan¹,

Lü²,

Fu³

2014

TOMSJ

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Carbon fiber paper (CFP), a type of flexible planer electromagnetic shielding material with thin thickness, low density, and good adhesion property and permeability, was laminated with wood veneer to produce a plywood composite with good shielding effectiveness (SE). It was found that a hot-press pressure of 1.2 MPa and a double-sized adhesive concentration of 380 g/m 2 were most appropriate for the production of CFP plywood composites. SE of plywood composite laminated with single layer CFP was better than that before hot pressed, which result from the formation of three-dimensional and smaller conductive carbon fiber circuitries. The space between two-layer CFPs and the thickness of the surface-layer veneer had significant influence on SE. The SE of the composites laminated with two-layer CFPs was significantly higher than those with one-layer CFPs. The SE in the frequency range of 30 MHz to 1 GHz reached above 30 dB depending on the space between two-layer CFPs and the thickness of the surface veneer, which was sufficient SE for commercialization and the use of plywood composites.

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Section: Plywood Composites Laminated With Veneer Of Different Thicknsupporting

confidence: 88%

Process and Structure of Electromagnetic Shielding Plywood Composite Laminated with Carbon Fiber Paper

Yuan¹,

Lü²,

Fu³

2014

TOMSJ

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“…The stimulus as well as the response can be electrical, thermal, chemical, magnetic or other origin. The reason why smart fabrics have attracted interest throughout the world is because of their ability to be used in applications such as antimicrobial clothing [1], electrotherapy [2], health monitoring shirts [3], transferring of data in clothing, military applications [4] and biosensors [5].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity of Nanostructured Polyaniline Combined With Mupirocin

Jotiram¹,

Prasad²,

Jakka³

et al. 2012

Nano BioMed ENG

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Nanostructured and conducting polymer polyaniline (PANI) is used in numerous applications in electrotherapy, electro-magnetic materials for monitoring health, antimicrobial clothing, data transfer in smart textiles, biosensors and for defense technology. An important criterion for all the above mentioned utilities is, producing polymeric conductive fibers. In the present study we prepared conducting PANI nanofibres combined with mupirocin, a topical antimicrobial agent, through a self-assembly process. The prepared polymer was then tested for the antibacterial properties against various Gram positive and Gram negative bacteria such as Streptococcus pyogenes, Staphylococcus epidermidis, Staphylococcus aureus and Escherichia coli. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were used to identify the chemical structure of the PANI nanofibres. The antibacterial properties were assessed by measuring the zones of inhibition. It was evident from these results that antimicrobial activity increased with increasing PANI and PANI combined with mupirocin (PANI-mupirocin) concentrations. It was also found that PANI-mupirocin has enhanced antimicrobial activity compared to PANI alone. This information might be useful to evaluate the potential use of nanostructured polyaniline in fabrics incorporated with antibacterial agents as a prophylactic use against bacterial skin infections in the near future.

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“…The frequencies where the biggest interference problems occur are located in the ranges of 50-60 Hz (stereo system) and of 1-100 GHz. [1][2][3][4][5][6] Diverse materials have been applied for EMI shielding, like typical metals as copper or aluminum, due to its high conductivity and dielectric constants, which contribute for high shielding effectiveness (SE). Despite the good mechanical and shielding properties, metals are heavy, are subject to corrosion, are difficult to process and to control SE.…”

Section: Introductionmentioning

confidence: 99%

Study of Microwave Absorbing Properties of Polyaniline/STF Conducting Composites Prepared by in Situ Polymerization

Schettini

Soares

2011

Macromolecular Symposia

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Summary: Conducting composites of polyaniline doped with dodecylbenzenesulfonic acid (PAni-DBSA) and poly(styrene-b-styrene-butadiene-b-styrene) (STF) as supporting matrix were prepared by in situ synthesis. The influence of composition and thickness on the electromagnetic properties and shielding effectiveness (SE) of the materials was evaluated using a microwave network analyzer and a standard rectangular waveguide from 8.2-12.4 GHz (X-band). It was found that the composition 49/51 exhibited the best SE and the higher values of reflected power (P R ), e 0 , e 00 and e Ã . The compositions 12/88 and 17/83 presented the higher values of transmitted power (P T ) and absorbed power (P A ), respectively. The composition 25/75 presented the higher value of tan d. The thickness of 5Â showed the best SE and higher value of P R . The higher value of transmitted power (P T ) was obtained for thickness of 1Â. The values of P A were similar for all thicknesses. The thickness of 1x showed the higher values of e 0 , e 00 , e Ã and tan d.

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Electromagnetic interference shielding efficiency of polyaniline mixtures and multilayer films

Cited by 175 publications

References 7 publications

Process and Structure of Electromagnetic Shielding Plywood Composite Laminated with Carbon Fiber Paper

Process and Structure of Electromagnetic Shielding Plywood Composite Laminated with Carbon Fiber Paper

Antibacterial Activity of Nanostructured Polyaniline Combined With Mupirocin

Study of Microwave Absorbing Properties of Polyaniline/STF Conducting Composites Prepared by in Situ Polymerization

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