Thermal and electrical characterization of poly(vinyl)alcohol)/poly(vinylidene fluoride) blends reinforced with nano-graphene platelets

Kolonelou, Eirini; Loupou, Eirini; Klonos, Panagiotis Α.; Sakellis, Elias; Valadorou, Dimitra; Kyritsis, Apostolos; Papathanassiou, A. N.

doi:10.1016/j.polymer.2021.123731

Cited by 10 publications

(9 citation statements)

References 23 publications

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“…Scanning electron microscopy (SEM) backscattering ensured a homogeneous dispersion of NGPs. NGP inclusions are captured in an SEM image (figure 1), where dark and light grayish regions were identified as PVA and PVdF, respectively [29]. A thorough inspection of the specimens by SEM imaging [29] indicated that PVDF grains were dispersed well in the composite matrix and aggregates were lacking.…”

Section: Methodsmentioning

confidence: 99%

Boosting the electro-mechanical coupling of piezoelectric polyvinyl alcohol–polyvinylidene fluoride blends by dispersing nano-graphene platelets

Valadorou¹,

Papathanassiou²,

Kolonelou³

et al. 2022

J. Phys. D: Appl. Phys.

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Water-soluble polyvinyl alcohol (PVA) mixed with piezo-active polyvinylidene fluoride (PVdF) micro-grains constitute hybrid blends for transfusing mechanical energy to electric one. The value of the piezoelectric coefficient is, in principle, a portion of the value that neat PVdF exhibits. In the present work, we investigate the possibility, by dispersing nano-graphene platelets (NGPs), to augment the total electromechanical coupling. Mechanical stress applied on structurally and compositionally heterogeneous solids results in increased values of the internal local stress field: NGPs are likely to amplify the local stress exercised on the surface of individual piezoelectric polymer grains. PVA - PVdF (3:1 w/w), cast from water solution, loaded with various fractions of NGPs boost the value of the overall piezoelectric coefficient by 150 % per weight fraction of NGPs and becomes superior to values reported for neat electro-active PVdF.

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Section: Methodsmentioning

confidence: 99%

Boosting the electro-mechanical coupling of piezoelectric polyvinyl alcohol–polyvinylidene fluoride blends by dispersing nano-graphene platelets

Valadorou¹,

Papathanassiou²,

Kolonelou³

et al. 2022

J. Phys. D: Appl. Phys.

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“…Recently, the PVATF sensors have been developed for sensing gases, pH, chemicals, pressure, temperature, and so forth. [16][17][18][19] The bibliometric analysis was performed via Google Scholar database using publish or perish software. The analysis exhibited that 12,351 papers have been published on the topic of PVATF sensors since 1987, as depicted in Figure 3.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the PVATF sensors have been developed for sensing gases, pH, chemicals, pressure, temperature, and so forth 16–19 . The bibliometric analysis was performed via Google Scholar database using publish or perish software.…”

Section: Introductionmentioning

confidence: 99%

A review on versatile applications of polyvinyl alcohol thin films, specifically as sensor devices

Shekaryar,

Norouzbahari

2023

Polymer Engineering & Sci

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Polyvinyl alcohol (PVA) thin films (PVATFs) have recently exhibited different applications in various fields, such as biomedical, optical, and energy storage. One of their outstanding applications has been known as sensor devices for various physical parameters, such as pH, pressure, gas, chemicals, strain, and humidity measurements. In this paper, after a brief review of the PVATFs biomedical, optical, and energy applications, their role as sensors is discussed in more detail. Afterward, the main preparation methods of the PVATFs sensors, for example, spin and dip coating, chemical bath deposition, and electrodeposition are surveyed. Eventually, the characterization methods of the fabricated PVATF sensors, along with their optimization techniques have been presented.Highlights Various applications of polyvinyl alcohol thin films (PVATFs) are presented. One of their main applications as sensor devices is discussed in more detail. PVATF sensors fabrication, characterization, and optimization are surveyed.

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“…Hitherto, various combinations of polymer/nanofiller binary nanocomposite systems have been successfully fabricated and characterized. Recently, polymer-blend-based multicomponent nanocomposites have attracted great attention due to their potential in advanced applications [23][24][25][26][27][28][29][30][31]. PC-blend-based and PVDF-blend-based nanocomposites have been studied to extend their individual versatility.…”

Section: Introductionmentioning

confidence: 99%

Polycarbonate/Poly(vinylidene fluoride)-Blend-Based Nanocomposites—Effect of Adding Different Carbon Nanofillers/Organoclay

et al. 2021

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Carbon black (CB), carbon nanotubes (CNTs), and graphene nanoplatelets (GnPs) individually or doubly served as reinforcing fillers in polycarbonate (PC)/poly(vinylidene fluoride) (PVDF)-blend (designated CF)-based nanocomposites. Additionally, organo-montmorillonite (15A) was incorporated simultaneously with the individual carbon fillers to form hybrid filler nanocomposites. Microscopic images confirmed the selective localization of carbon fillers, mainly in the continuous PC phase, while 15A located in the PVDF domains. Differential scanning calorimetry results showed that blending PVDF with PC or forming single/double carbon filler composites resulted in lower PVDF crystallization temperature during cooling. However, PVDF crystallization was promoted by the inclusion of 15A, and the growth of β-form crystals was induced. The rigidity of the CF blend increased after the formation of nanocomposites. Among the three individually added carbon fillers, GnPs improved the CF moduli the most; the simultaneous loading of CNT/GnP resulted in the highest moduli by up to 33%/46% increases in tensile/flexural moduli, respectively, compared with those of the CF blend. Rheological viscosity results showed that adding CNTs increased the complex viscosity of the blend to a greater extent than did adding CB or GnPs, and the viscosity further increased after adding 15A. The electrical resistivity of the blend decreased with the inclusion of carbon fillers, particularly with CNT loading.

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Thermal and electrical characterization of poly(vinyl)alcohol)/poly(vinylidene fluoride) blends reinforced with nano-graphene platelets

Cited by 10 publications

References 23 publications

Boosting the electro-mechanical coupling of piezoelectric polyvinyl alcohol–polyvinylidene fluoride blends by dispersing nano-graphene platelets

Boosting the electro-mechanical coupling of piezoelectric polyvinyl alcohol–polyvinylidene fluoride blends by dispersing nano-graphene platelets

A review on versatile applications of polyvinyl alcohol thin films, specifically as sensor devices

Polycarbonate/Poly(vinylidene fluoride)-Blend-Based Nanocomposites—Effect of Adding Different Carbon Nanofillers/Organoclay

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