High dielectric constant polyaniline/poly(acrylic acid) composites prepared by in situ polymerization

Ho, Ching Hui; Liu, Cheng-Dar; Hsieh, C.-M.; Hsieh, K. H.; Lee, Sung‐Nung

doi:10.1016/j.synthmet.2008.04.014

Cited by 100 publications

(47 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The decrease was seen at lower concentrations of CdS nanofiller. The increase in this value indicates the increase in loss storage ratio and hence the composite becomes a semi-conductor and is similar to the ob-A G t servations made by Chao-Hsien Ho et al [38] from the studies on PANI-DBSA/PAA (polyaniline, dodecyl-benzene sulfonate and poly-acrylic acid) films. These experimental results show that ε′, ε″ and tan δ had a strong dependence on the measured frequency.…”

Section: Loss Tangent (D or Tan δ)supporting

confidence: 82%

Influence of cadmium sulfide nanoparticles on structural and electrical properties of polyvinyl alcohol films

Koteswararao¹,

Abhishek²,

Satyanarayana³

et al. 2016

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. Cadmium sulfide (CdS) nanoparticles have been synthesized by hydrothermal method and dispersed in poly vinyl alcohol (PVA) matrix in varying amounts by weight. Subsequently, PVA/CdS nanocomposites have been synthesized with the objective of investigating the effect of CdS nanoparticles on structural and electrical properties of PVA films. Structural properties were analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. Differential scanning calorimetry (DSC) was used to investigate thermal properties of PVA/CdS nanocomposites. Electrical properties were measured by using high frequency LCR meter and were found to be strongly dependent on frequency and nano CdS content. Dielectric constant decreased with increase in frequency and with increase in nanofiller concentration. AC conductivity and dielectric loss increased with frequency and decreased with increase in nano CdS content.

show abstract

Section: Loss Tangent (D or Tan δ)supporting

confidence: 82%

Influence of cadmium sulfide nanoparticles on structural and electrical properties of polyvinyl alcohol films

Koteswararao¹,

Abhishek²,

Satyanarayana³

et al. 2016

Express Polym. Lett.

View full text Add to dashboard Cite

show abstract

“…Polyaniline has emerged as one of the most promising conducting organic polymers, owing to its high polymerization yield, good environmental stability, moderate electrical conductivity and relatively low production cost. Recently, we have worked on developing high dielectric permittivity nano-composites systems, such as PANI-DBSA/PU(polyurethane), 29 PANI-DBSA/ PAA, 30 and PANI-DBSA/epoxy, 31 for the applications in the fields of energy storage, integral capacitor technology, electro-active devices and electromagnetic interference(EMI). In these studies, negative ε values have been observed when we follow certain synthetic routes and fabrication procedures.…”

confidence: 99%

“…30,31 Figure 2 depicts the variation of ε of PANA-DBSA/PAA nano-composites, plotted with respected to PANI contents and the AC frequencies applied. The results show that a negative ε was obtained for all the nano-composites containing more than 6 wt% of PANI.…”

confidence: 99%

Polyaniline nano-composites with large negative dielectric permittivity

et al. 2012

Self Cite

View full text Add to dashboard Cite

Two polyaniline (PANI)/polymer nano-composites exhibiting huge negative dielectric permittivity have been synthesized for the first time. These novel chemical processes open a new approach for fabrication of the negative index materials (NIMs), since most of the NIMs prepared today are obtained by a structural approach – by putting together two structured materials that exhibit separately a negative permittivity and a negative permeability. We found the negative permittivity of these nano-composites is a function of the content of the dopant (i.e., PANI) as well as of the frequency. The generation of huge negative permittivity can be rationalized by the well-dispersed PANI-DBSA nano-particles which form a pseudo-continuous conductive pathway in these nano-composites.

show abstract

“…These results further prove our hypothesis. This series of composites had lower tan d values than the PANI-DBSA/PAA composites, 22 and compared with carbon nanotube/SPAEK composites, 18 these composites had a high dielectric constant and lower tan d as well. This was because the electrical conductivity of the semiconductor PANI was lower than that of carbon nanotubes, and organic-phase PANI exhibited a better dispersion than carbon nanotubes in the polymer matrix, which prevented an amount of electron accumulation.…”

Section: Instrumentationmentioning

confidence: 80%

High dielectric constant polyaniline/sulfonated poly(aryl ether ketone) composite membranes with good thermal and mechanical properties

Zhang

Huo

Liu

et al. 2013

J of Applied Polymer Sci

View full text Add to dashboard Cite

All-organic polyaniline (PANI)/sulfonated poly(aryl ether ketone) (SPAEK) composite membranes consisting of a PANI (conducting) filler evenly distributed in an SPAEK (insulating) matrix were prepared with a solution-blending technique. The dielectric properties, electrical conductivity, and thermal and mechanical performances of the all-organic PANI/SPAEK composite membranes were investigated as a function of different PANI loading levels. The composite membrane containing 30 wt % PANI exhibited a high dielectric constant of about 600, a low dielectric loss tangent of about 0.6 (at 1 kHz), and good thermal properties (temperature for 5% weight loss > 250 C) and mechanical properties (tensile strength 35 MPa).

show abstract

High dielectric constant polyaniline/poly(acrylic acid) composites prepared by in situ polymerization

Cited by 100 publications

References 39 publications

Influence of cadmium sulfide nanoparticles on structural and electrical properties of polyvinyl alcohol films

Influence of cadmium sulfide nanoparticles on structural and electrical properties of polyvinyl alcohol films

Polyaniline nano-composites with large negative dielectric permittivity

High dielectric constant polyaniline/sulfonated poly(aryl ether ketone) composite membranes with good thermal and mechanical properties

Contact Info

Product

Resources

About