Insulating characteristics of polyvinyl alcohol for integrated electronics

Etten, Eliana A. Van; Ximenes, Eder S.; Tarasconi, Lucas T.; Garcia, Irene Teresinha Santos; Forte, Maria M.C.; Boudinov, H.

doi:10.1016/j.tsf.2014.07.051

Cited by 96 publications

(44 citation statements)

References 31 publications

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“…PVA is a hydrophilic, nontoxic, and biocompatible polymer, and it is completely soluble in hot water. The aqueous solution‐cast film of PVA has a high optical transparency, good chemical resistance, and electrically insulating characteristics; these properties have established it as the most suitable binder, substrate, and insulator for the fabrication of various electronic devices and sensors and also for chemical engineering processes and pharmaceutical and biomedical applications . With respect to various kinds of inorganic nanoparticles, TiO 2 has gained more attention because of its low toxicity, excellent transparency for visible light, UV absorbance, and high chemical stability .…”

Section: Introductionmentioning

confidence: 99%

Anomalous behavior of the dielectric and electrical properties of polymeric nanodielectric poly(vinyl alcohol)–titanium dioxide films

Choudhary

Sengwa

2016

J of Applied Polymer Sci

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The complex dielectric permittivity, alternating-current electrical conductivity, electric modulus, and impedance spectra of polymeric nanocomposite (PNC) films consisting of a poly(vinyl alcohol) (PVA) matrix dispersed with nanosize particles of titanium dioxide (TiO 2 ); (i.e., PVA-x wt % TiO 2 , where x is 0, 1, 3, or 5) were investigated in the frequency range 20 Hz to 1 MHz at ambient temperature. A detailed analysis of the results showed that the values of the dielectric and electrical parameters of these PNC-based nanodielectric films varied anomalously with increasing TiO 2 concentration. The temperature-dependent dielectric characterization of the PVA-3 wt % TiO 2 film revealed that the dielectric polarization at a fixed frequency increased nonlinearly with increasing temperature. The temperature-dependent electric modulus relaxation time values of the nanodielectric film obeyed Arrhenius behavior. The X-ray diffraction study confirmed that the crystalline phase of the PVA matrix decreased with increasing TiO 2 concentration; this suggested that the interaction of the TiO 2 nanoparticles caused some destruction of the hydroxyl group dipolar ordering in the hydrogen-bonded crystalline structure of the pristine PVA matrix. The intensities of the diffraction peaks of the TiO 2 nanofiller were enhanced as its concentration increased in these nanodielectrics; this confirmed the existence of TiO 2 nanoparticles inside the crystalline phases of the PVA matrix. The surface morphology of the films was examined by the study of their scanning electron micrographs. The feasibility of using these flexible polymeric nanodielectric films as electrical insulators and dielectric substrates in lowpower microelectronic devices operated at audio-and radio-frequency electric fields was explored. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44568.

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Section: Introductionmentioning

confidence: 99%

Anomalous behavior of the dielectric and electrical properties of polymeric nanodielectric poly(vinyl alcohol)–titanium dioxide films

Choudhary

Sengwa

2016

J of Applied Polymer Sci

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“…then gradually decreased with increasing frequency due to the relaxation process of the oriented polarization. Primarily, the ε′ value of PVA exhibits a weak frequency dependence since the polarization depends on the freedom of chain movement attributed to hydroxyl groups as eternal dipoles in the polymer chain [23]. Meanwhile, PVA/MWNT nanocomposite only shows a slight increment in the ε′ value with increasing frequency when compared to the pure PVA.…”

Section: Materials Characterizationmentioning

confidence: 99%

“…It is amongst promising polar polymer that can be applied as a dielectric medium [23]. The addition of AgNP with CNT is great importance because it can increase conductivity and introduce high permittivity PVA nanocomposites due to strong interfacial polarization created in a three-phase system.…”

Section: Introductionmentioning

confidence: 99%

The tunable permittivity of multi-walled carbon nanotubes/silver nanoparticles reinforced polyvinyl alcohol (PVA) nanocomposites at low frequency

Yusof

Wong

et al. 2018

Mater. Res. Express

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This paper is about tailoring high permittivity of multi-walled carbon nanotubes/silver nanoparticles (MWNT-AgNP) filled polyvinyl alcohol (PVA) nanocomposites at low frequency. PVA/MWNTAgNP nanocomposites were synthesized via solution-casting technique at low MWNT content with different loading of AgNP. The nanocomposites showed a significant increment in ac conductivity, σ ac , and dielectric permittivity, ε′ by two orders of magnitude as compared to pure PVA. The maximum ε′ value was achieved about 600 at 1.0 wt% of AgNP due to the increased charge carriers density and high interfacial polarization within the nanocomposites. The relaxation frequency was shifted towards a higher value with the increased of AgNP content while the relaxation time was decreased by 40%. Field emission scanning electron microscopy (FESEM) images showed the enhanced distribution of MWNT in the presence of AgNP to provide conductive pathways in the matrix. This was confirmed by energy-dispersive x-ray (EDX) analysis and ultraviolet-visible (UV-vis) spectroscopy. As a result, PVA/MWNT-AgNP nanocomposites have great potential for electrical applications such as cable accessories, high charge-storage capacitor and electromagnetic interference shielding materials.

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“…Therefore, the number of contributions in the development of hybrid composites based on polymers and nanoparticles with high permittivity, low cost, and easily tunable properties, have become a hot topic in the research of materials [3]. Recently, some works have been reported the integration of thin films based on polymeric materials such as Polyvinyl alcohol (PVA) as a gate dielectrics for the development of organic Thin Film Transistors (TFT), due to the high dielectric constant which enhances the gate capacitance, with the advantages of solution processable material, at low cost, non-of 13 toxic, with flexible hydrophilic network and low temperature of deposition [4] [5]. PVA is a poor electric conductor, water soluble, it has carbon chain backbone with OH groups and it is eco-friendly, and its physical properties may be adapted to a specific requirement in conjunction with inorganic materials [6].…”

Section: Introductionmentioning

confidence: 99%

Polymeric Nanocomposites Membranes with High Permittivity Based on PVA-ZnO Nanoparticles for Potential Applications in Flexible Electronics

Ambrosio

Carrillo-Castillo

Mota

et al. 2018

Preprint

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In this study is reported the optical, structural and dielectric properties of Poly (vinyl alcohol) thin films membranes with embedded ZnO nanoparticles (PVA/ZnO) obtained by solution casting method at low temperature of deposition. Fourier Transform Infrared spectra showed the characteristics peaks, which correspond to O-H and Zn-O bonds present in the hybrid material. The X-ray diffraction patterns indicated the presence of ZnO structure into the films. The composite material showed low absorbance and a wide band gap energy from 5.6 to 5.9 eV. The surface morphology for the thin films of PVA/ZnO was studied by Atomic Force Microscopy and Scanning Electron Microscopy. The dielectric properties of the nanocomposites were measured from low to high frequencies, the results showed a high dielectric constant (ε) in the order of 104 at low frequency and values from ε ≈ 2000 to 100 in the range of 1KHz-1MHz respectively, the properties of PVA/ZnO such as the high permittivity and the low temperature of processing make it a suitable material for potential applications in the development of flexible electronic devices.

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Insulating characteristics of polyvinyl alcohol for integrated electronics

Cited by 96 publications

References 31 publications

Anomalous behavior of the dielectric and electrical properties of polymeric nanodielectric poly(vinyl alcohol)–titanium dioxide films

Anomalous behavior of the dielectric and electrical properties of polymeric nanodielectric poly(vinyl alcohol)–titanium dioxide films

The tunable permittivity of multi-walled carbon nanotubes/silver nanoparticles reinforced polyvinyl alcohol (PVA) nanocomposites at low frequency

Polymeric Nanocomposites Membranes with High Permittivity Based on PVA-ZnO Nanoparticles for Potential Applications in Flexible Electronics

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