Development of electromagnetic shielding materials from the conductive blends of polyaniline and polyaniline-clay nanocomposite-EVA: Preparation and properties

Devaki, Sudha J.; Sivakala, S.; Prasanth, R.; Reena, Viswan L.; Nair, P.M.

doi:10.1016/j.compscitech.2008.10.026

Cited by 110 publications

(63 citation statements)

References 25 publications

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“…These results reveal that the addition of PANI in composites increases the conductivity of PANI-epoxy resin composites to a range that is suitable for antistatic and RAM applications. [44][45][46] Thermal analysis PANI-doped BSA powders and cured PANI/epoxy resin composites were characterized by TGA under a nitrogen purge in the temperature range of 25-600 1C. Figures 11a and b illustrate the weight loss (wt%) of all of the PANI samples as a function of temperature.…”

Section: Electrical and Dielectric Propertiesmentioning

confidence: 99%

Polyaniline-doped benzene sulfonic acid/epoxy resin composites: structural, morphological, thermal and dielectric behaviors

Belaabed

Lamouri

Naar

et al. 2010

Polym J

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Conducting polymer composites, which are simply physical mixtures of an insulating polymer matrix and intrinsically conducting polymers, are promising new materials for various applications such as antistatic coatings, shielding and electromagnetic absorbers. In this context, a novel conducting composite was successfully produced. It is based on epoxy resin and polyaniline (PANI) doped in benzene sulfonic acid, which was used as conducting filler. The effect of PANI loading levels on the structural, morphological, thermal, electrical and dielectric properties was explored using techniques, such as Raman, Fourier transform infrared and ultraviolet-visible-NIR spectroscopy, X-ray diffraction, atomic force microscopy, scanning electron microscopy, thermogravimetric analysis and differential scanning calorimetry. The electrical behavior and morphology of the synthesized PANI revealed disorder and defects. In addition, as the applied voltage is increased, the current through the sample increases rapidly. The conductivity and dielectric properties were also investigated at room temperature in the frequency range of 1 MHz-1 GHz. The dielectric constant was shown to increase with increased loading at low frequencies and then decreases rapidly, reaching a constant value at higher frequencies. In addition, the AC conductivity of the prepared composites increases with the addition of PANI and is higher at high frequencies. Furthermore, the stability of the composites was found to be influenced by increasing the amount of PANI filler in the matrix.

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Section: Electrical and Dielectric Propertiesmentioning

confidence: 99%

Polyaniline-doped benzene sulfonic acid/epoxy resin composites: structural, morphological, thermal and dielectric behaviors

Belaabed

Lamouri

Naar

et al. 2010

Polym J

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“…In order to overcome the intractability of ICPs and to bring them into the solution/melt, some techniques such as: introduction of bulky side groups or dopant ions into the polymeric chain or use of polymeric or surfactant stabilizers optimize the formation of ICP solutions [15][16][17] . Blends of conducting polymers with conventional polymers have been extensively studied [18][19][20][21] . Their mixture with conventional polymers consists of a good strategy from the technological point of view [22][23][24] .…”

Section: Introductionmentioning

confidence: 99%

Rheological behavior of acrylic paint blends based on polyaniline

et al. 2016

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SbstractThe rheological properties of acrylic paints and polyaniline (PAni) blends, with different contents of PAni doped by dodecyl benzene sulphonic acid (DBSA) and, dispersed by mechanical stirrer and ultrasonic, were investigated by controlled shear rate testing ramps. The results showed that the commercial acrylic paint had tended to deliver the required stability on the blends, in order to avoid sedimentation process. All samples exhibited non-Newtonian flow behavior (shear thinning), increasing PAni content the flow behavior index (n) decreased (0.41 to 0.11) and power law model were used to fitted the experimental curves. The results showed that the addition of PAni-DBSA affects the viscoelastic behavior of the mixtures due to the interactions between the components in the mixture. The best properties were obtained for samples 90/10 wt % dispersed by ultrasonic, indicating the feasibility of the usage as a conducting paint.

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“…37 These results reveal that the addition of PANI increases the conductivity of ER composites to a value that is suitable for antistatic and radar absorbing material applications. [38][39][40] Electromagnetic shielding effectiveness Shielding effectiveness (SE) is typically used to assess the shielding properties of a material and is defined as the ratio of the power transmitted through the material (P t ) to the incident power (P i ) 41 SE ðdBÞ ¼ À10 logðP t =P i Þ ð 8Þ For a shielding material, total SE is the sum of SE¼SE R +SE A +SE M , where SE R is the shielding resulting from reflection, SE A is due to absorption and SE M is due to multiple reflections. Measurements of the electromagnetic parameters (S 11 , S 21 ), which represent the reflection and transmission coefficients, were carried out using a vector network analyzer from 10 MHz to 20 GHz.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Curing kinetics, thermomechanical and microwave behaviors of PANI-doped BSA/epoxy resin composites

Belaabed¹,

Lamouri²,

Wojkiewicz

2011

Polym J

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This work focuses on the elaboration and characterization of conducting polymer composites based on polyaniline (PANI) dispersed in an epoxy resin (ER) matrix and cured using an anhydride without a catalyst. PANI-doped benzene sulfonic acid was successfully synthesized in this manner and used as conducting filler. The effect of heating rate and PANI loading level on the curing process was investigated by differential scanning calorimetry in the dynamic mode. Furthermore, the phase structure, viscoelastic behavior and hardness of the composites were explored by dynamic mechanical thermal analysis and Vickers tests. The structure and morphology of the samples were investigated by scanning electron microscopy, which revealed behavior that varied as a function of the concentration of PANI in the composites. Dielectric properties were investigated up to 1 MHz. The electromagnetic shielding effectiveness of the composites was measured in the microwave band from 8 to 18 GHz. It was found that the electrical properties of PANI were influenced by elevated curing temperature of the ER, a variable that significantly affected the composite characteristics. In addition, the dielectric properties, curing parameters, viscoelasticites and electromagnetic behaviors of the composites were affecting by increasing the concentration of PANI filler in the matrix.

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Development of electromagnetic shielding materials from the conductive blends of polyaniline and polyaniline-clay nanocomposite-EVA: Preparation and properties

Cited by 110 publications

References 25 publications

Polyaniline-doped benzene sulfonic acid/epoxy resin composites: structural, morphological, thermal and dielectric behaviors

Polyaniline-doped benzene sulfonic acid/epoxy resin composites: structural, morphological, thermal and dielectric behaviors

Rheological behavior of acrylic paint blends based on polyaniline

Curing kinetics, thermomechanical and microwave behaviors of PANI-doped BSA/epoxy resin composites

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