Effect of oxyfluorination on electromagnetic interference shielding behavior of MWCNT/PVA/PAAc composite microcapsules

Yun, Jumi; Im, Ji Sun; Lee, Young-Seak; Kim, Hyung Il

doi:10.1016/j.eurpolymj.2010.02.005

Cited by 88 publications

(33 citation statements)

References 31 publications

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“…Several methods have been developed to produce MWCNTs/polymer composites, such as intercalation, in situ polymerization, direct mixing, surfactant‐assisted mixing, solution blending, and electrospinning . Electrostatic spinning or electrospinning is recognized as a simple and inexpensive process for making high‐performance MWCNTs/polymer composite with nanofibrous structure, when compared with other methods.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of highly dispersed multi-walled carbon nanotubes/polyvinylpyrrolidone composite nanofibers for EMI shielding application

2016

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Multi-walled carbon nanotubes (MWCNTs)/polyvinylpyrrolidone (PVP) composite nanofibers having varying amounts of MWCNTs were fabricated with an aim to investigate the potential of such nanofibers as an effective light weight electromagnetic interference (EMI) shielding material in the frequency range of 8.2-12.4 GHz (X-band). The state of dispersion of MWCNTs in PVP matrix was studied by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The TEM and SEM analyses confirmed the presence of individual dispersion MWCNTs encapsulated within the electrospun nanofibers and showed MWCNTs/PVP composite nanofiber morphologies with diameters of 150-600 nm. Moreover, the MWCNTs/PVP composite nanofibers were characterized by X-ray diffraction and Raman spectrophotometer. The thermal stability of composite nanofibers studied from thermogravimetric analysis was increased after addition of MWCNTs to PVP matrix. The EMI shielding efficiency of MWCNTs/PVP composite nanofibers increased up to 42 dB. The MWCNTs/PVP composite nanofibers developed in this study have benefits in being light weight and having effective EMI shielding performance and can be best candidates for a broad range of electronic applications.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of highly dispersed multi-walled carbon nanotubes/polyvinylpyrrolidone composite nanofibers for EMI shielding application

2016

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“…CNT-polymer composites either based on solvent casting or melt-based techniques have been studied with various polymer matrices, including PMMA [22], liquid crystal polymers, and melamine formaldehydes [23], PVA [24], and fused silica [25] for various applications such as radiation protection, EMI shielding, and electrostatic discharge materials. There are many reports on EMI shielding of carbon nanotubes reinforced polymer composites [26-30] in the X-band region because of its use in military communication satellites, weather monitoring, air traffic control, defense trackingand high-resolution imaging radars.…”

Section: Introductionmentioning

confidence: 99%

Inorganic nanotubes reinforced polyvinylidene fluoride composites as low-cost electromagnetic interference shielding materials

2011

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Novel polymer nanocomposites comprising of MnO2 nanotubes (MNTs), functionalized multiwalled carbon nanotubes (f-MWCNTs), and polyvinylidene fluoride (PVDF) were synthesized. Homogeneous distribution of f-MWCNTs and MNTs in PVDF matrix were confirmed by field emission scanning electron microscopy. Electrical conductivity measurements were performed on these polymer composites using four probe technique. The addition of 2 wt.% of MNTs (2 wt.%, f-MWCNTs) to PVDF matrix results in an increase in the electrical conductivity from 10-16S/m to 4.5 × 10-5S/m (3.2 × 10-1S/m). Electromagnetic interference shielding effectiveness (EMI SE) was measured with vector network analyzer using waveguide sample holder in X-band frequency range. EMI SE of approximately 20 dB has been obtained with the addition of 5 wt.% MNTs-1 wt.% f-MWCNTs to PVDF in comparison with EMI SE of approximately 18 dB for 7 wt.% of f-MWCNTs indicating the potential use of the present MNT/f-MWCNT/PVDF composite as low-cost EMI shielding materials in X-band region.

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“…However, the strength of the C-F bond decreased because of the lower fluorine content in the reaction gas. In a previous work, a fluorine rule, which states that fluorine radicals activate sites on the carbon material and allow efficient induction of oxygen functional groups [22][23][24]. Thus, hydrophilic functional groups were introduced on the surface of the carbon in the samples prepared with a higher oxygen content during oxyfluorination.…”

Section: Effects Of Oxyfluorination On the Chemical Components Of Pitmentioning

confidence: 98%

The electrochemical behavior of an enzyme biosensor electrode using an oxyfluorinated pitch-based carbon

Kim

Bae

et al. 2013

Journal of Industrial and Engineering Chemistry

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Effect of oxyfluorination on electromagnetic interference shielding behavior of MWCNT/PVA/PAAc composite microcapsules

Cited by 88 publications

References 31 publications

Synthesis and characterization of highly dispersed multi-walled carbon nanotubes/polyvinylpyrrolidone composite nanofibers for EMI shielding application

Synthesis and characterization of highly dispersed multi-walled carbon nanotubes/polyvinylpyrrolidone composite nanofibers for EMI shielding application

Inorganic nanotubes reinforced polyvinylidene fluoride composites as low-cost electromagnetic interference shielding materials

The electrochemical behavior of an enzyme biosensor electrode using an oxyfluorinated pitch-based carbon

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