Effect of BaTiO3 on the sensing properties of PVDF composite-based capacitive humidity sensors

Mallick, Shoaib; Ahmad, Zubair; Qadir, Karwan Wasman; Rehman, Abdul; Shakoor, Abdul; Touati, Farid; Al‐Muhtaseb, Shaheen A.

doi:10.1016/j.ceramint.2019.09.291

Cited by 66 publications

(25 citation statements)

References 21 publications

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“…The d33 coefficients were measured to be about 20 pC/N. The spin-coating technique [131] was used to prepare the PVDF-BaTiO3 nanocomposite films on an interdigital ITO electrode (Figure 7e). Vineet et al [61] fabricated PVDF/PZT piezoelectric composite films by a solution cast technique.…”

Section: Fabrication Of Pvdf By Spin Coating and Solvent Castingmentioning

confidence: 99%

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Composites, Fabrication and Application of Polyvinylidene Fluoride for Flexible Electromechanical Devices: A Review

Guo

Duan

Xie

et al. 2020

Preprint

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The technological development of piezoelectric materials is crucial for developing wearable and flexible electromechanical devices. There are many inorganic materials with piezoelectric effects, such as piezoelectric ceramics, aluminum nitride, and zinc oxide. They all have very high piezoelectric coefficients and large piezoelectric response ranges. The characteristics of high hardness and low tenacity make inorganic piezoelectric materials unsuitable for flexible devices that require frequent bending. Polyvinylidene fluoride (PVDF) and its derivatives are the most popular materials used in flexible electromechanical devices in recent years and have high flexibility, high sensitivity, high ductility, and a certain piezoelectric coefficient. Owing to increasing the piezoelectric coefficient of PVDF, researchers are committed to optimizing PVDF materials and enhancing their polarity by a series of means to further improve their mechanical–electrical conversion efficiency. This paper reviews the latest PVDF-related optimization materials, related processing and polarization methods, and the applications of these materials such as those in wearable functional devices, chemical sensors, biosensors, and flexible actuator devices for flexible micro-electromechanical devices. We also discuss the challenges of wearable devices based on flexible piezoelectric polymer, consider where further practical applications could be.

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Section: Fabrication Of Pvdf By Spin Coating and Solvent Castingmentioning

confidence: 99%

“…(a) Schematic diagram of the spin coating and (b) Solvent casting; (c) Spin coated PVDF-TrFE was dissolved in MEK and the silicon mold was hot pressed on the film [129]; (d) SEM of PVDF-TrFE copolymer thin films fabricated by spin coating[130]; (e) Preparing the PVDF-BaTiO3 nanocomposite films by spin coating[131].…”

mentioning

confidence: 99%

Composites, Fabrication and Application of Polyvinylidene Fluoride for Flexible Electromechanical Devices: A Review

Guo

Duan

Xie

et al. 2020

Preprint

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“…Poly(vinylidene fluoride) (PVDF) is a thermoplastic polymer which has been widely studied for specific applications due to its piezoelectric properties. [8][9][10][11] In addition, it offers excellent mechanical properties, chemical and thermal stability, aging resistance and ease of processing. [12][13][14] However, PVDF has not been commercially employed in SLS.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of poly(vinylidene fluoride)/carbon black composites, manufactured by selective laser sintering

et al. 2021

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In this study, we investigated the viability of processing composites based on poly(vinylidene fluoride) and carbon black (PVDF/CB) applying the selective laser sintering (SLS) process, with equipment constructed in the laboratory. In the first step, the powder particles of PVDF and CB were characterized by scanning electron microscope, particle size distribution, differential scanning calorimetry, and thermogravimetric analysis. In order to evaluate the effect of CB on the morphology, electrical conductivity, and mechanical properties, specimens of PVDF/CB composites with different weight fractions (wt%) were manufactured. The addition of conductive CB to the PVDF matrix improves the mechanical properties up to a certain point, with fractions greater than 1.00 wt% of CB resulting in a decrease in the mechanical properties of the composite. For the composite with 0.5 wt% of CB the electrical conductivity was around 10 −4 S/cm, representing an increase of approximately 10 orders of magnitude when compared to the neat PVDF (3.41 x 10 −15 S/cm). In addition, increases of 59% for the elastic modulus and 150% for the maximum stress were observed when compared to the corresponding values for neat PVDF.The results obtained in this study demonstrate the potential for the use of PVDF/CB composites as a raw material to produce functional components by the SLS process.

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“…Numerous types of humidity sensors have been developed using resistive [ 4 , 5 ] and capacitive devices [ 6 , 7 ], quartz crystal microbalances [ 8 , 9 , 10 ], optical devices [ 11 , 12 ], and even surface acoustic waves [ 13 , 14 ]. This very particular research has also led to the development of materials and nanostructures that are highly sensitive to humidity, including TiO 2 nanopowders [ 15 ] and nanotubes [ 16 ], ZnO nanowires [ 17 ], WO 3 nanosheets [ 18 ], Fe 2 O 3 nanopowders [ 19 ], graphene layers [ 20 ], organic/inorganic polymers [ 21 ], ZrO 2 nanorods [ 22 ], and NiO-SnO 2 nanofibers [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Gr/3D–ZnO Nanocomposites as Humidity Sensors with Enhanced Sensing Response

Lin¹,

Lin

et al. 2021

Polymers

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This work introduces a novel humidity sensor based on a nanocomposite material comprising graphene decorated with three-dimensional flower-like structures of zinc oxide (Gr/3D–ZnO) fabricated via a hydrothermal method with various weight percentages of graphene. The surface structure and morphology of the Gr/3D–ZnO nanocomposite were analyzed using XRD, EDS, SEM, TEM, and Raman spectroscopy. The influence of humidity on the electrical properties of the nanocomposite was also investigated. Experiment results revealed that the nanocomposite with 70 wt% of graphene provided high sensitivity (S = 446) with rapid response times (120 s) and recovery times (160 s). These results demonstrate the excellent potential of the proposed Gr/3D–ZnO nanocomposite in monitoring atmospheric humidity. A discussion on the mechanism underlying the effects of humidity on the Gr/3D–ZnO nanocomposite is also provided.

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Effect of BaTiO3 on the sensing properties of PVDF composite-based capacitive humidity sensors

Cited by 66 publications

References 21 publications

Composites, Fabrication and Application of Polyvinylidene Fluoride for Flexible Electromechanical Devices: A Review

Composites, Fabrication and Application of Polyvinylidene Fluoride for Flexible Electromechanical Devices: A Review

Evaluation of poly(vinylidene fluoride)/carbon black composites, manufactured by selective laser sintering

Gr/3D–ZnO Nanocomposites as Humidity Sensors with Enhanced Sensing Response

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