Synthesis, structural, thermal, mechanical, and nano-scale free volume properties of novel PbO/PVC/PMMA nanocomposites

El‐Gamal, S.; Elsayed, Mohamed

doi:10.1016/j.polymer.2020.122911

Cited by 28 publications

(18 citation statements)

References 64 publications

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“…the conductivity of the studied films is thermally activated, like semiconductor materials. This behavior is considered a common feature in disordered materials 27,28 and is a result of (i) the increase in the hopping of the ions or charge carriers that occurs between the coordinating sites and local structural relaxations; 41 (ii) the higher probability of the chains of the blend or YO nanosheets/blend to get faster internal modes, which enhances the bond rotation and improves such hopping; 42 (iii) the reduction in viscosity that promotes both chain flexibility 43 and the ion or dipole motion; (iv) the increase in the segmental motion of chains, which increases the free volume 31 and consequently enhances the ion mobility.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, structural, optical and electrical characterization of Y₂O₃/poly(ethylene glycol)–poly(vinyl chloride) based nanocomposite solid polymer electrolytes

Mohammed

El‐Gamal

Sayed

et al. 2022

Polymer International

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Nanocomposite solid polymer electrolytes (NCSPEs) have attracted a lot of attention as excellent candidates for future electronics, photonics and energy storage devices. In this work, Y2O3 (YO) nanosheets were prepared by a free‐template sol–gel method and incorporated inside a poly(ethylene glycol)–poly(vinyl chloride) (blend) matrix via solution casting. NCSPE films were then prepared by adding NaClO4 (NC) or LiCl (LC) to the nanocomposite solutions. XRD and field emission SEM showed that YO has a body‐centered cubic structure and a crystallite size of 24.8 nm, and looks like nanosheets with a high purity. The XRD results of the films showed that YO loading and salt complexation increase the films' amorphous structure. SEM was used to study the surface morphology and film thickness. Fourier transform infrared spectra confirmed the complexation and interactions between the YO/blend and NC or LC. UV–visible spectroscopy revealed that the films display low transmittance (˂17%), an extinction coefficient k between 0.2 × 10−3 and 1 × 10−3 and a comparatively high refractive index. The band gap of the blend decreased from 4.3 to 4.0 eV on loading YO, and NC exhibited a higher impact on Eg compared with LC. A significant increase in σac with complexing was reported and the maximum value was 7.4 × 10−4 S cm−1 for the 10 wt% NC/YO/blend structure. The NCSPE films are ionic conductors and have a non‐Debye type of conductivity relaxation, and the applied AC conduction mechanism is correlated barrier hopping. © 2022 Society of Industrial Chemistry.

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Section: Resultsmentioning

confidence: 99%

Synthesis, structural, optical and electrical characterization of Y₂O₃/poly(ethylene glycol)–poly(vinyl chloride) based nanocomposite solid polymer electrolytes

Mohammed

El‐Gamal

Sayed

et al. 2022

Polymer International

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“…19). Some optical and electrical parameters of PMMA and its metal oxide-based polymeric nanocomposite materials are given in Table 6 [142][143][144].…”

Section: Pmma/metal Sulfide Nanocomposite Used As An Emissive Layer Materialsmentioning

confidence: 99%

Recent advances in efficient emissive materials-based OLED applications: a review

2021

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In the present time, organic light-emitting diode (OLED) is a very promising participant over light-emitting diodes (LEDs), liquid crystal display (LCD), and also another solid-state lighting device due to its low cost, ease of fabrication, brightness, speed, wide viewing angle, low power consumption, and high contrast ratio. The most prominent layer of OLED is the emissive layer because the device emission color, contrast ratio, and external efficiency depend of this layer's materials. This review ruminates on the basics of OLEDs, different light emission mechanisms, OLEDs achievements, and different types of challenges revealed in the field of OLEDs. This review's primary intention is to broadly discuss the synthesizing methods, physicochemical properties of conducting polymer polymethyl methacrylate (PMMA), and its polymeric nanocompositebased emissive layer materials for OLEDs application. It also discusses the most extensively used OLED fabrication techniques. PMMA-based polymeric nanocomposites revealed good transparency properties, good thermal stability, and high electrical conductivity, making suitable materials as an emissive layer for OLED applications.

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“…A Cu foil was cut into the same dimensions as the silicon wafer and was cleaned in acetone and deionized water to remove the impurities. Before starting the CVD process, the substrate was annealed at 900°C, and then graphene lms were developed by the CVD process details that can be seen anywhere else [21][22][23][24].…”

Section: Preparation Of Graphene-based Micro Lmsmentioning

confidence: 99%

CVD grown Graphene Microfilms as a Promising Microscaled Solid Lubricant for the Lubrication of Silicon MEMS Devices

Chhattal

Ghaffar

Dharejo

et al. 2021

Preprint

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Friction, wear, stiction, adhesion, and absence of suitable lubrication methods are important challenges, severely restricting and limiting the expeditious development of Microelectromechanical system (MEMS) technology. This paper aims to explore the potential of chemical vapor deposition (CVD) grown graphene microfilms for the lubrication of sliding silicon MEMS devices to reduce friction and wear problems. A novel silicon-based pin-on-disk friction-pair is designed to mimic sliding MEMS working conditions. Pure graphene-based microfilms are fabricated on the Cu substrate via a CVD method and transferred to the silicon substrate via the PMMA transfer method. To investigate microfilms' surface quality and morphology, microfilms are characterized via Raman spectroscopy, AFM, and SEM. For the tribological performance evaluation, different tribological tests were conducted using the microtribometer. Results show that microfilms remarkably reduced the friction coefficient and wear in the MEMS devices; however, microfilms' tribological performance depends on the roughness and the number of films on the specimen. This remarkable tribological performance suggests that graphene microfilms have the potential to increase the reliability and wear lifespan of MEMS devices. It is foreseeable that this lubrication method can be a step towards the expeditious industrial development of silicon MEMS devices.

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Synthesis, structural, thermal, mechanical, and nano-scale free volume properties of novel PbO/PVC/PMMA nanocomposites

Cited by 28 publications

References 64 publications

Synthesis, structural, optical and electrical characterization of Y₂O₃/poly(ethylene glycol)–poly(vinyl chloride) based nanocomposite solid polymer electrolytes

Synthesis, structural, optical and electrical characterization of Y₂O₃/poly(ethylene glycol)–poly(vinyl chloride) based nanocomposite solid polymer electrolytes

Recent advances in efficient emissive materials-based OLED applications: a review

CVD grown Graphene Microfilms as a Promising Microscaled Solid Lubricant for the Lubrication of Silicon MEMS Devices

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Synthesis, structural, thermal, mechanical, and nano-scale free volume properties of novel PbO/PVC/PMMA nanocomposites

Cited by 28 publications

References 64 publications

Synthesis, structural, optical and electrical characterization of Y2O3/poly(ethylene glycol)–poly(vinyl chloride) based nanocomposite solid polymer electrolytes

Synthesis, structural, optical and electrical characterization of Y2O3/poly(ethylene glycol)–poly(vinyl chloride) based nanocomposite solid polymer electrolytes

Recent advances in efficient emissive materials-based OLED applications: a review

CVD grown Graphene Microfilms as a Promising Microscaled Solid Lubricant for the Lubrication of Silicon MEMS Devices

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Product

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Synthesis, structural, optical and electrical characterization of Y₂O₃/poly(ethylene glycol)–poly(vinyl chloride) based nanocomposite solid polymer electrolytes

Synthesis, structural, optical and electrical characterization of Y₂O₃/poly(ethylene glycol)–poly(vinyl chloride) based nanocomposite solid polymer electrolytes