Characterization and some physical studies of PVA/PVP filled with MWCNTs

Zidan, H. M.; Abdelrazek, E.M.; Abdelghany, A.M.; Tarabiah, A. E.

doi:10.1016/j.jmrt.2018.04.023

Cited by 237 publications

(122 citation statements)

References 33 publications

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“…1a), there exist many pronounced bands at 3053-3697, 2951, 2917, 1660, 1494, 1465, 1418, 1376 and 1294 cm −1 in addition to other small ones. These bands and peaks refer to stretching vibration of OH [32,33], CH 2 asymmetric stretching [32], CH 2 vibration [34], stretching of C═O [35], stretching vibration of C═N, CH bending [35], CH 2 scissoring vibrations [32,35], CH 2 bending [11,35] and CH 2 twisting or wagging vibration [35,36] respectively. As compared with the FT-IR spectrum of the plain PVP film ( Fig.…”

Section: Ft-ir Analysismentioning

confidence: 99%

“…This effect is caused by the interaction of the filler's atoms and the functional groups of the host PVP polymer. This influence of the filler on the host PVP backbone affects its chains' potential energy [35], and hence the whole optical properties of the polymeric composite films as shown below. Our result agrees with the reported ones [32,37].…”

Section: Ft-ir Analysismentioning

confidence: 99%

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Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

Badawi

2021

Appl. Phys. A

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The optical properties of polyvinylpyrrolidine (PVP) polymer have been enhanced using ternary Zn 1-x Sn x S as a filler for UVregion optical applications. Solution casting technique is used to prepare different Sn molar ratios (x: 0-0.3) in Zn 1-x Sn x S filled PVP polymeric composite films (1.0 wt.%). SEM, FT-IR and UV-visible-NIR spectrophotometry is utilized to characterize the optical properties of the plain PVP and polymeric composite films. SEM images reveal the homogeneous dispersion of the filler (Zn 1-x Sn x S) in the host PVP matrix. The FT-IR spectroscopic measurements ensure the successful interaction of ternary Zn 1-x Sn x S material and the host PVP polymer. The cut off transmittance edge is shifted from 260 nm (host PVP) to 390 nm (polymeric composite). The direct optical energy bandgap of the prepared polymeric composite films are shifted from 4.78 eV (plain PVP) to 3.45 eV for Zn 0.7 Sn 0.3 S polymeric composite film. An enhancement of the refractive index (n) and the optical conductivity (σ opt.) of the polymeric composite films is achieved as compared with those of the plain one. The single oscillator (E 0) and dispersion (E d) energies of the polymeric composite films were determined using Wemple and DiDomenico (WDD) model. The prepared polymeric composite films are strongly recommended for UV-region optical applications.

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Section: Ft-ir Analysismentioning

confidence: 99%

Section: Ft-ir Analysismentioning

confidence: 99%

Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

Badawi

2021

Appl. Phys. A

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“…20 To our knowledge, there are few reports about the one-step preparation of CDs with solid-state luminescence. 21,22 What's more, reports that mentioned the solid-state uorescence (SSF) of CDs usually require the recombination of CDs and a solid matrix such as a polymer matrix to obtain the SSF. However, CDs as polymer materials generally have a xed shape, which are inconvenient to apply in many elds compared with phosphors.…”

Section: Introductionmentioning

confidence: 99%

One-step hydrothermal synthesis and optical properties of self-quenching-resistant carbon dots towards fluorescent ink and as nanosensors for Fe³⁺ detection

Lei

Chen

et al. 2019

RSC Adv.

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“…It combines the outstanding electrically conducting with the thermally conducting behaviors. On the basis on these remarkable properties, CNTs have been heavily used for producing high performance and multifunctional PNCs . Such PNCs can be used as strain sensors in aerospace, sports, infrastructure, and textile industries .…”

Section: Introductionmentioning

confidence: 99%

“…On the basis on these remarkable properties, CNTs have been heavily used for producing high performance and multifunctional PNCs. [19][20][21][22] Such PNCs can be used as strain sensors 20 in aerospace, sports, infrastructure, and textile industries. 23 They are used in medicine 24 and electronic products.…”

Section: Introductionmentioning

confidence: 99%

Characterization, optical, and nanoscale free volume properties of Na‐CMC/PAM/CNT nanocomposites

Awad

El‐Gamal

Sayed

et al. 2019

Polymers for Advanced Techs

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Polyblend and nanocomposite films of sodium salt of carboxymethylcellulose (Na‐CMC)/polyacrylamide (PAM) and Na‐CMC/PAM modified with carbon nanotubes (CNT) were synthesized by the solution casting technique. The effect of PAM and CNT loading on the structural, optical, and nanoscale free volume properties of Na‐CMC was studied. X‐ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy exhibited the existence of strong interactions between Na‐CMC and PAM and the non‐destructive effect of CNT on Na‐CMC/PAM structure. The HR‐TEM revealed the multi‐walled structure of CNT with a 7.06‐nm wall thickness and a 6.92‐nm wall inner diameter. Positron annihilation lifetime spectroscopy (PALS) was done, in a vacuum and at 30°C to 200°C, to investigate the nanoscale free volume properties by using a conventional fast‐fast coincidence spectrometer. It was found that the o‐Ps lifetime (τ3) and free volume (Vh) increase with increasing CNT percentage in the Na‐CMC/PAM blend. The distribution of the o‐Ps lifetime was broadened with increasing CNT ratios. Furthermore, the glass transition temperature (Tg) increases with increasing loads of CNT. For the first time, a correlation was done between Urbach energy (EU) and Vh. Finally, the results were represented and discussed in the frame of free volume properties. Optical measurements showed that the transmittance T% of Na‐CMC/PAM was 91.12% and decreased to 68.42% and 36.45% after loading with 1.0 and 2.0 wt % CNT. In addition, the blend shows higher insulating properties compared with the individual polymers. The CNT incorporation reduces the band gap significantly and increases the EU in the films.

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Characterization and some physical studies of PVA/PVP filled with MWCNTs

Cited by 237 publications

References 33 publications

Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

One-step hydrothermal synthesis and optical properties of self-quenching-resistant carbon dots towards fluorescent ink and as nanosensors for Fe³⁺ detection

Characterization, optical, and nanoscale free volume properties of Na‐CMC/PAM/CNT nanocomposites

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Characterization and some physical studies of PVA/PVP filled with MWCNTs

Cited by 237 publications

References 33 publications

Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

One-step hydrothermal synthesis and optical properties of self-quenching-resistant carbon dots towards fluorescent ink and as nanosensors for Fe3+ detection

Characterization, optical, and nanoscale free volume properties of Na‐CMC/PAM/CNT nanocomposites

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One-step hydrothermal synthesis and optical properties of self-quenching-resistant carbon dots towards fluorescent ink and as nanosensors for Fe³⁺ detection