Impedance study on humidity dependent conductivity of polymer composites with conductive nanofillers

Park, Ye-Jin; Lee, Sohyeon; Kim, Bomin; Kim, Jihye; So, Ju‐Hee; Koo, Hyung‐Jun

doi:10.1016/j.compositesb.2020.108412

Cited by 20 publications

(8 citation statements)

References 24 publications

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“…In the model fitted Nyquist plots of conductive Ti 3 C 2 T x loading composite materials, the imaginary axis related to

ω_{italicmax} = 1 / C_{B} \times R_{B}

and the real axis related to R B , where C B and R B are the bulk capacitance and resistance, respectively. With increase in Ti 3 C 2 T x contents in the Ti 3 C 2 T x /EMA composites, the semiconducting behavior of the fitted curves are declined because of the emergence of percolation limit indicating the existence of subordinate aggregation 66 . From the model fitted plots, the values of electrical parameters and relaxation phenomena are noted in Table 4.…”

Section: Dielectric Analysismentioning

confidence: 98%

Structural, thermal and dielectric properties of 2D layered Ti₃C₂T_x (MXene) filled poly (ethylene‐co‐methyl acrylate) (EMA) nanocomposites

Malik

Parida

et al. 2022

J of Applied Polymer Sci

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Light-weight and flexible 2D MXene-based polymer materials with low dielectric loss and high dielectric constant have drawn great attention in the power systems and modern electronic field. A series of Ti 3 C 2 T x /EMA composites were fabricated via simple solution casting followed by a compression molding method with various mass concentrations of Ti 3 C 2 T x (0, 1, 3, 5, 8, 10, 12, and 15 wt%). Morphological and micro structural properties of the prepared composites were studied via X-ray diffraction (XRD) and fieldemission scanning electron microscope (FESEM), where the distribution of Ti 3 C 2 T x in the Ti 3 C 2 T x /EMA composites was confirmed. Thermal behaviors were analyzed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) investigations. The DSC analysis reveals that the % of crystallinity decreases from 11.06 with 1 wt% to 5.68 with 15 wt%, where Ti 3 C 2 T x acts as an efficient nucleating agent. TGA data confirm the enhancement of the thermal stability of the composites upon increasing in Ti 3 C 2 T x loading. The room temperature electrical and dielectric behavior of the studied composites were examined in the frequency range of 100 Hz-5 MHz. In this work, the 10 wt% of Ti 3 C 2 T x loaded poly (ethylene-co-methyl acrylate) composite (EMA) showed higher dielectric permittivity (ε 0 = 124.22) with lower dissipation loss (tan δ = 0.051) at 100 Hz among all weight percentages. The behavior of charge carriers in the prepared composites was studied by utilizing the impedance spectroscopy technique. The electrical parameters were calculated from the fitted Nyquist plots with a corresponding circuit model. I-V curves confirmed the conduction mechanisms of the composites. This beneficial enhancement in electrical properties recommends the composite can be utilized in flexible electronic storage devices.

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“…In the model fitted Nyquist plots of conductive Ti 3 C 2 T x loading composite materials, the imaginary axis related to

ω_{italicmax} = 1 / C_{B} \times R_{B}

Section: Dielectric Analysismentioning

confidence: 98%

Structural, thermal and dielectric properties of 2D layered Ti₃C₂T_x (MXene) filled poly (ethylene‐co‐methyl acrylate) (EMA) nanocomposites

Malik

Parida

et al. 2022

J of Applied Polymer Sci

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“…Resistive humidity sensors can be fabricated with a variety of materials, such as ceramics [65], semiconductors [66], polymers and composites [67], and CBMs [68]. Depending on the sensor composition, they can exhibit either a positive or a negative resistance dependency with the humidity.…”

Section: Relative Humidity Effectsmentioning

confidence: 99%

Material jetting of carbon nano onions for printed electronics

Pinto,

Nemala,

Faraji

et al. 2023

Nanotechnology

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As an additive manufacturing process, material jetting techniques allow to selectively deposit droplets of materials in liquid or powder form through a small-diameter aperture, such as a nozzle of a print head. For the fabrication of printed electronics, a variety of inks and dispersions of functional materials can be deposited by drop-on-demand printing on rigid and flexible substrates. In this work, zero-dimensional multi-layer shell-structured fullerene material, also known as carbon nano-onion (CNO) or onion-like carbon (OLC), is printed on polyethylene terephthalate (PET) substrates using drop-on-demand inkjet printing. CNOs are produced using a low-cost flame synthesis technique and characterized by electron microscopy, Raman, X-ray photoelectron spectroscopy, and specific surface area and pore size measurements. The produced CNO material has an average diameter of ~33 nm, pore diameter in the range ~2-40 nm and a specific surface area of 232 m2.g-1. The CNO dispersions in ethanol have a reduced viscosity (~1.2 mPa.s) and are compatible with commercial piezoelectric inkjet heads. The jetting parameters are optimized to avoid satellite drops and to obtain a reduced drop volume (52 pL), resulting in optimal resolution (220 µm) and line continuity. A multi-step process is implemented without inter-layer curing and a fine control over the CNO layer thickness is achieved (~180 nm-thick layer after 10 printing passes). The printed CNO structures show an electrical resistivity of ~600 Ω.m, a high negative temperature coefficient of resistance (-4.35x10-2 ºC-1) and a marked dependency on relative humidity (-1.29x10-2 RH%-1). The high sensitivity to temperature and humidity, combined to the large specific area of the CNOs, make this material and the corresponding ink a viable prospect for inkjet-printed technologies, such as environmental and gas sensors.

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“…Ko et al first report all-two-dimensional (2D) bis (trifluoromethane sulfonyl)-amide (TFSA)-doped graphene (GR) (TFSA-GR)/MoS 2 / triethylenetetramine (TETA)-doped GR (TETA-GR) vertical-heterostructure semitransparent photodetectors (PDs) on rigid/flexible substrates, which exhibited good stability [25]. Among these, polymers are promising humidity-sensing candidates because they exhibit dramatic changes in electrical conductivity when exposed to various levels of environmental humidity [26][27][28]; they also have excellent properties, are low-cost to prepare, nontoxic, easy to fabricate, and are stable at room temperature. Additionally, graphene-based humidity sensors have received increased attention because they can generate electricity from the air by absorbing water molecules [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

Zhu

Lin²,

Lin

et al. 2021

Polymers

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In this particular experiment, a chain of conductive polymer graphene/polypyrrole (Gr/PPy) and BiPO4—or (Gr/PPy)–BiPO4—materials were prepared and used as moisture-sensitive materials. The structure and morphology of the conductive polymer (Gr/PPy)–BiPO4 materials were analyzed using an X-ray diffractometer, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. Moreover, properties such as hysteresis loop, impedance, sensing response, and response and recovery time were calculated and evaluated using an inductance–capacitance–resistance analyzer. The data expressed that PPy/BiPO4, as prepared in this study, exhibited excellent sensing properties, with impedance changing by only a few orders of range. Furthermore, the response time and time of recovery were 340 s and 60 s, respectively, and negligible humidity hysteresis occurred at different relative humidities. Therefore, conductive PPy/BiPO4, as prepared in the present study, is an excellent candidate for application in humidity sensors.

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Impedance study on humidity dependent conductivity of polymer composites with conductive nanofillers

Cited by 20 publications

References 24 publications

Structural, thermal and dielectric properties of 2D layered Ti₃C₂T_x (MXene) filled poly (ethylene‐co‐methyl acrylate) (EMA) nanocomposites

Structural, thermal and dielectric properties of 2D layered Ti₃C₂T_x (MXene) filled poly (ethylene‐co‐methyl acrylate) (EMA) nanocomposites

Material jetting of carbon nano onions for printed electronics

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

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Impedance study on humidity dependent conductivity of polymer composites with conductive nanofillers

Cited by 20 publications

References 24 publications

Structural, thermal and dielectric properties of 2D layered Ti3C2Tx (MXene) filled poly (ethylene‐co‐methyl acrylate) (EMA) nanocomposites

Structural, thermal and dielectric properties of 2D layered Ti3C2Tx (MXene) filled poly (ethylene‐co‐methyl acrylate) (EMA) nanocomposites

Material jetting of carbon nano onions for printed electronics

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

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Product

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Structural, thermal and dielectric properties of 2D layered Ti₃C₂T_x (MXene) filled poly (ethylene‐co‐methyl acrylate) (EMA) nanocomposites

Structural, thermal and dielectric properties of 2D layered Ti₃C₂T_x (MXene) filled poly (ethylene‐co‐methyl acrylate) (EMA) nanocomposites