Structural, optical, thermal, and dielectric properties of polyethylene oxide/carboxymethyl cellulose blend filled with barium titanate

Morsi, M.A.; Abdelaziz, M.; Oraby, A.H.; Mokhles, I.

doi:10.1016/j.jpcs.2018.10.009

Cited by 90 publications

(53 citation statements)

References 62 publications

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“…Figure 2(b) displays the XRD patterns of CMC A , CMC B , CMCNFs and CMCNCs. As for CMC A , a broad diffraction peak at around 2θ = 21° indicates its amorphous nature 37,38 . Unlike CMC A , mild carboxymethylation did not destroy the crystal structure of cellulose, three cellulose I major peaks in the XRD pattern of CMC B are presented at about 16.7°, 22.5° and 34.5°.…”

Section: Resultsmentioning

confidence: 91%

“…As for CMC A , a broad diffraction peak at around 2θ = 21 indicates its amorphous nature. 37,38 Unlike CMC A , mild carboxymethylation did not destroy the crystal structure of cellulose, three cellulose I major peaks in the XRD pattern of CMC B are presented at about 16.7 , 22.5 and 34.5 . Similarly, these peaks also exist in the structure of CMCNFs and CMCNCs, suggesting both crystals are cellulose I.…”

Section: Characterization Of Cmc a Cmc B Cmcnfs And Cmcncsmentioning

confidence: 96%

See 1 more Smart Citation

Preparation of treelike and rodlike carboxymethylated nanocellulose and their effect on carboxymethyl cellulose films

Wei

Jia

Zhang

et al. 2020

J of Applied Polymer Sci

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In this work, carboxymethyl cellulose (CMC) with low substitution degree, followed by different posttreatments, was applied to prepare treelike CMC nanofibrils (CMCNFs) and rodlike CMC nanocrystals (CMCNCs), and their performance in CMC composite film was evaluated simultaneously. From transmission electron microscopy results, it was found that the treelike CMCNCFs exhibited a lager aspect ratio compared to the rodlike CMCNCs. As for reinforcing CMC film, 4 wt% was the best adding amount, at this time, the tensile strength of CMC/CMCNFs and CMC/CMCNCs composite films was increased by 72.1% and 47.3%, respectively. Moreover, adding these nanofillers to CMC also could enhance the thermal stability of composite films slightly, while the transmittance of composite films was reduced at the same time. In addition, CMC/CMCNFs film was designed as a packaging box to determine its performance. Therefore, this study could reveal the differences of properties for composites with different types of nanocellulose and provide a foundation for further application of nanocellulose.

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Section: Resultsmentioning

confidence: 91%

Section: Characterization Of Cmc a Cmc B Cmcnfs And Cmcncsmentioning

confidence: 96%

Preparation of treelike and rodlike carboxymethylated nanocellulose and their effect on carboxymethyl cellulose films

Wei

Jia

Zhang

et al. 2020

J of Applied Polymer Sci

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“…PEO has CC (1276 cm −1 ), CH (2883, 960, and 839 cm −1 ), and CO (1349 and 1097 cm −1 ) bonds 30 . PANI has NH bonds in 3366 cm −1 , CN and CC in 1600 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Hydrophilicity of electrospun microfibers of polyethylene oxide with semisoluble polyaniline for biological applications

Ramirez

Olayo

Palacios

et al. 2021

J of Applied Polymer Sci

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This work studies the hydrophilicity of electrospun microfibers of polyaniline (PANI) synthesized by plasma combined with polyethylene oxide (PEO). The hydrophilicity was evaluated measuring the contact angles of water, phosphate‐buffered saline (PBS) and Krebs‐Ringer (KR) biological solutions formed on the polymers. Plasma PANI is usually insoluble due to the crosslinking associated with the electrical discharges of the synthesis conditions; however, PANI was synthesized as semi‐soluble films, which were dissolved and mixed with soluble PEO to obtain PANI/PEO electrospun microfibers. Super‐hydrophilic (<30°) angles were obtained with water on PEO fibers and hydrophobic (>90°) angles were obtained with the PBS solution on PANI/PEO fibers. PANI films had contact angles, which increased with the salts of KR and PBS solutions, PEO films had sudden increments and reductions with the saline solutions. PANI showed the typical chemical groups of polyanilines and others as CN and CC associated with a high dehydrogenation, which disappeared in PANI fibers. Electromagnetic absorption peaks in the 270–320 nm wavelength range were detected in the fibers and not in the films, which can be associated with transitions between benzoid and quinoid PANI structures. These results indicated that PANI/PEO fibers would not dissolve as rapidly as PEO fibers in biological solutions.

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“…Yadava et al prepared a GO/CMC/alginate composite and found that incorporation of 1 wt % GO improves the tensile strength and the Young modulus by 40% and 1128%, respectively . Morsi et al studied the effect of barium titanate (BaTiO 3 ) on PEO/CMC blend and found an enhancement in the electrical properties after BaTiO 3 loading …”

Section: Introductionmentioning

confidence: 99%

“…9 Morsi et al studied the effect of barium titanate (BaTiO 3 ) on PEO/CMC blend and found an enhancement in the electrical properties after BaTiO 3 loading. 10 Polyacrylamide (PAM) is a linear, biocompatible, nontoxic, and polar polymer. Its ability to make strong interactions with other polymers and with the drug molecules, via the hydrogen bonding formation, facilitates its use for drug diffusion and release.…”

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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Structural, optical, thermal, and dielectric properties of polyethylene oxide/carboxymethyl cellulose blend filled with barium titanate

Cited by 90 publications

References 62 publications

Preparation of treelike and rodlike carboxymethylated nanocellulose and their effect on carboxymethyl cellulose films

Preparation of treelike and rodlike carboxymethylated nanocellulose and their effect on carboxymethyl cellulose films

Hydrophilicity of electrospun microfibers of polyethylene oxide with semisoluble polyaniline for biological applications

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

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