Polymer Nanocomposites: Synthesis and Characterization

Arya, Anil; Sharma, Annu

doi:10.1007/978-3-030-26668-4_8

Cited by 6 publications

(4 citation statements)

References 80 publications

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“…[ 65–69 ] The shape and orientation of the fillers, which strongly affect their percolation properties, can greatly facilitate ionic diffusion through newly formed ionic channels. [ 70,71 ] During the past three years, new opportunities for electroactive materials have started to emerge in optoelectronic applications, [ 72 ] photovoltaic applications, [ 73 ] and in the development of plasmonic biosensors and hyperbolic metamaterials. [ 74,75 ]…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study of Nanocomposite Permittivity with a Tunable Clustering of Inclusions

Allahyarov

2020

Advcd Theory and Sims

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A new analytical model is proposed for the nanocomposite permittivity eff in mean-field approach using integrated coefficients for the inclusion clustering and matrix reaction effects. Predictions for eff are in a satisfactory agreement with the Lichtenecker and Bruggeman mixing rules, depending on whether the reaction field is ignored or incorporated into the theory. The observed differences between the Maxwell-Garnett, Lichtenecker, and Bruggeman results are interpreted in terms of the fraction of the stored dipolar energy they take into account. A novel analytical expression for the average dipolar field ⟨ ⃗ E ⟩ in the film shows a U-shaped dependence on the filler packing fraction , with an absolute maximum at m = 1/e. New analytical expressions derived for the average dipolar energy u m and dipole-dipole interaction energy u m in the nanocomposite depend on the cluster orientation parameter , and take into account the film boundary effects. It is found that the enhancement of eff at higher is associated with an increase in the inclusion dipole moment p in the oriented clusters resulting from dipole-dipole correlations, which inflate the energy u p stored inside the inclusions.

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Section: Introductionmentioning

confidence: 99%

Theoretical Study of Nanocomposite Permittivity with a Tunable Clustering of Inclusions

Allahyarov

2020

Advcd Theory and Sims

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“…From our previous knowledge, AC and DC breakdown strengths change synchronously with the treatment or modification method. For instance, both AC and DC breakdown strengths of nanofiller-enhanced dielectrics increase initially and then decrease with the content of nano fillers [38][39][40][41][42][43][44][45][46]. However, it seems that such a synchronous change does not exist when modifying polymeric films with a surface treatment.…”

Section: Surface-oxidation-dependent Electrical Breakdownmentioning

confidence: 99%

Investigation on AC and DC Breakdown Mechanism of Surface-Ozone-Treated LDPE Films under Varied Thicknesses

Nie,

Liu,

et al. 2023

Polymers

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Electrical breakdown is an important physical phenomenon in power equipment and electronic devices. Recently, the mechanism of AC and DC breakdown has been preliminarily revealed as electrode–dielectric interface breakdown and bulk breakdown, respectively, based on space charge dynamics through numerical calculations. However, the AC breakdown mechanism still lacks enough direct experimental support, which restricts further understanding and the design and development of electrical structures. Here, in this study, LDPE films with various thicknesses ranging from 33 μm to 230 μm were surface modified with ozone for different durations to experimentally investigate DC and AC breakdown mechanism. The results indicate that carbonyl groups (C=O) were introduced onto the film surface, forming shallow surface traps and leading to a decreased average trap depth and an increased trap density. Such a surface oxidation modulated trap distribution led to enhanced space charge injection and bulk electrical field distortion, which decreased DC breakdown strength as the oxidation duration went longer, in all film thicknesses. However, such decreases in breakdown strength occurred only in films below 55 μm under AC stresses, as the enhanced electrical field distortion at the electrode–dielectric interface was more obvious and dominating in thin films. These experimental results further confirm the proposed electrode–dielectric interface breakdown of dielectric films and provide new understandings of space charge modulated electrical breakdown, which fulfills dielectric breakdown theory and benefits the miniaturization of power equipment and electronic devices.

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“…This indicates that the degree of crystallinity of two broad humps has decreased, implying an amorphous phase in the CGPE systems that provide more free volume for the transportation of ions via interaction of nanofiller-polymer and ion-polymer. [39][40][41] In addition, the crystallinity index of the CGPE can be calculated from the ratio of the integrated area of all crystalline peaks to the total integrated area under the XRD peaks using Equation (2) as follows:…”

Section: Xrd Analysis Of Electrolyte Systemsmentioning

confidence: 99%

Comparison effect of thin microrod‐nanowhisker manganese oxide (MnO₂) and spherical grain‐like cobalt oxide (Co₃O₄) as nanofiller for performance‐enhanced composite gel terpolymer electrolyte‐based dye‐sensitized solar cells

Razali

Goh

Farhana

et al. 2022

J of Applied Polymer Sci

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Gel polymer electrolyte (GPE) are better replacement of liquid electrolyte for dye‐sensitized solar cell (DSSC) but they have low efficiency due to insufficient segmental motion within the electrolyte. By incorporating transition metal oxide nanofiller, it can improve the performance of DSSC due to the existence of cross‐linking center that provides interaction with polymer side chain and redox mediator. Two different transition metal oxides (namely, manganese oxide, MnO2 and cobalt oxide, Co3O4) were synthesized using sonochemical method and incorporated as nanofiller. Poly (vinyl butyral‐co‐vinyl alcohol‐co‐vinyl acetate) (P(VB‐co‐VA‐co‐VAc)) as a host terpolymer and sodium iodide (NaI) as a dopant salt were used to formulate the composite gel terpolymer electrolytes (CGPEs). The two different shapes of nanofiller have impacted the performance of CGPE proven by the structural analysis. It was found that both systems, the highest ionic conductivity achieved at 2.5 wt% of MnO2 and Co3O4 content with values of 6.40 and 5.2 mS cm−1, respectively. Surprisingly, the performance DSSC of Co3O4‐based CGPE was higher due to the strong Lewis's acidity of Co3O4, which absorb more iodide ions into the surface and facilitating the ions mobility. CGPE containing 2.5 wt% Co3O4 yield the highest efficiency, with value of 3.69%.

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Polymer Nanocomposites: Synthesis and Characterization

Cited by 6 publications

References 80 publications

Theoretical Study of Nanocomposite Permittivity with a Tunable Clustering of Inclusions

Theoretical Study of Nanocomposite Permittivity with a Tunable Clustering of Inclusions

Investigation on AC and DC Breakdown Mechanism of Surface-Ozone-Treated LDPE Films under Varied Thicknesses

Comparison effect of thin microrod‐nanowhisker manganese oxide (MnO₂) and spherical grain‐like cobalt oxide (Co₃O₄) as nanofiller for performance‐enhanced composite gel terpolymer electrolyte‐based dye‐sensitized solar cells

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Polymer Nanocomposites: Synthesis and Characterization

Cited by 6 publications

References 80 publications

Theoretical Study of Nanocomposite Permittivity with a Tunable Clustering of Inclusions

Theoretical Study of Nanocomposite Permittivity with a Tunable Clustering of Inclusions

Investigation on AC and DC Breakdown Mechanism of Surface-Ozone-Treated LDPE Films under Varied Thicknesses

Comparison effect of thin microrod‐nanowhisker manganese oxide (MnO2) and spherical grain‐like cobalt oxide (Co3O4) as nanofiller for performance‐enhanced composite gel terpolymer electrolyte‐based dye‐sensitized solar cells

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Comparison effect of thin microrod‐nanowhisker manganese oxide (MnO₂) and spherical grain‐like cobalt oxide (Co₃O₄) as nanofiller for performance‐enhanced composite gel terpolymer electrolyte‐based dye‐sensitized solar cells