Production of flexible nanocomposite membranes for x-ray detectors

Ayesh, Ahmad I.; Salah, Belal; Nawwas, Rama; Alyafei, Aldana; AlMansouri, Sara; Al‐Sulaiti, Leena

doi:10.1016/j.apsusc.2020.146958

Cited by 10 publications

(19 citation statements)

References 31 publications

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“…The introduction of copper oxide does not lead to a change in T g . These results are slightly at variance with the data of References [17,18].…”

Section: Thermal Analysissupporting

confidence: 80%

“…In particular, PVA/metal oxide or PVA/metal ion composites have excellent thermal, luminescence, optoelectronics, dielectric, and photocatalytic properties. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Depending on the properties of metal oxides, researchers try to obtain a composite polymer with the desired properties. For example, nanocomposites based on PVA/ZnO are considered as components of optoelectronics, photoelectronics, and photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

“…8,16 The inverse effect of lowering the melting point for the PVA + CuO composites, Ce(III) doped PVA, and PVA + In 2 O 3 is associated with the unique properties of transition and noble metals. [17][18][19] For improving the optical properties of the composites, lanthanide ions are introduced. 14,15 Different methods are used, such as sol-gel, 10,11 solving casting method, 3,[5][6][7][8][9][20][21][22][23] freeze-thawing procedure, 24 and laser ablation 25 for producing composites on the base of PVA with metal oxides.…”

Section: Introductionmentioning

confidence: 99%

“…The addition of metal oxide nanoparticles to the polymer matrix improves its physical and mechanical properties. In particular, PVA/metal oxide or PVA/metal ion composites have excellent thermal, luminescence, optoelectronics, dielectric, and photocatalytic properties 5–19 . Depending on the properties of metal oxides, researchers try to obtain a composite polymer with the desired properties.…”

Section: Introductionmentioning

confidence: 99%

“…It was established that the introduction of boehmite or Al 2 O 3 + ZnO into PVA improves the thermal stability of composites compared to pure PVA 8,16 . The inverse effect of lowering the melting point for the PVA + CuO composites, Ce(III) doped PVA, and PVA + In 2 O 3 is associated with the unique properties of transition and noble metals 17–19 . For improving the optical properties of the composites, lanthanide ions are introduced 14,15 …”

Section: Introductionmentioning

confidence: 99%

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Effect of metal oxides added onto polyvinyl alcohol via pulsed underwater plasma on their thermal, electrical and dielectric properties

Khlyustova

Sirotkin

Краев

et al. 2021

J of Applied Polymer Sci

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Flexible electronics require materials with high breakdown strength, high dielectric constant, and thermal stability. These conditions are met by composites based on polymers and metal oxides. In this article, we present a new onestep method for producing composites based on water-soluble polyvinyl alcohol (PVA) and metal oxides (AlOOH, CuO, and ZnO). The source of oxides is underwater plasma. The oxides are introduced into the polymer matrix when plasma is exposed to the polymer solution. The results of X-ray, IR, and SEM analysis showed that metal oxides are embedded in the polymer. Differential scanning calorimetry measurements have shown that the glass transition temperature depends on the oxide being incorporated. The electrical properties of polymer composites were studied by current-voltage characteristics. Dielectric properties were measured in the range of 25-10 6 Hz. The properties of obtained PVA + metal oxide showed that using underwater plasma is a suitable method for producing composites for electronic devices.

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“…The introduction of copper oxide does not lead to a change in T g . These results are slightly at variance with the data of References [17,18].…”

Section: Thermal Analysissupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of metal oxides added onto polyvinyl alcohol via pulsed underwater plasma on their thermal, electrical and dielectric properties

Khlyustova

Sirotkin

Краев

et al. 2021

J of Applied Polymer Sci

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Investigation of x‐ray response for flexible nanocomposite membranes of metal oxides and poly(vinyl alcohol)

Ayesh

Salah

Nawwas

et al. 2021

J of Applied Polymer Sci

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In this work, flexible composite membranes of nanoparticles (CuO, ZnO, or both), poly(vinyl alcohol) (PVA), and glycerol (GL) plasticizer are fabricated of for X-ray detector applications. The nanoparticles are synthesized by a modified solvothermal technique and introduced to PVA + GL solution to fabricate the membranes. The mean sizes of nanoparticles are 10 Ç 4 nm and 8 Ç 3 nm, for CuO and ZnO in order. The composition of nanoparticles and membranes are investigated by energy dispersive x-ray spectroscopy and x-ray spectroscopy. Increasing nanoparticle concentration within the membranes causes their glass transition temperature to shift to low temperatures and enhances their thermal resistance. Fourier-transform infrared spectroscopy demonstrates the formation of hydrogen bonds between nanoparticles and PVA that are generated by the intermolecular and intramolecular hydrogen bonds. Impedance spectroscopy characterization reveals that the membranes hold negative temperature coefficient of the resistance. The activation energy decreases with increasing nanoparticle concentration. The composite membranes exhibit a decent response to x-ray that is proportional to its energy. The best x-ray response is for the membranes with both CuO and ZnO nanoparticles, because of their different bandgaps that cause a wide range of excitation energy to be involved. The fabricated membranes have numerous advantages such as their semiconductor features, flexibility, and feasibility of fabrication on a large scale with reasonable cost.

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Potential Wound Dressing with Antibacterial Effect from Cross‐Linked Polyvinyl Alcohol/Sodium Caseinate/CuO NP Electrospun Mat

Samatya Yilmaz,

Uzuner,

Aytac

2024

ChemistrySelect

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In this study, nanofibers were produced from Polyvinyl alcohol (PVA)/Sodium Caseinate (SoCAS)/Copper Oxide nanoparticle (CuO NP) mixtures by electrospinning method. Nano surfaces were cross‐linked by immersion in a Glutaraldehyde (GLA) bath. Electrospun mats are designed as modern wound dressings with antibacterial effects for exuding wounds. The cross‐linking process by dipping has thickened a bit of nanofiber diameter by creating a coating effect on fiber surface. The increase of acetal bonds and decrease of hydroxyl groups in structure by cross‐linking have improved thermal properties of nanofibers. The increase in melting enthalpy has also improved mechanical properties of mats. The mixture of semicrystalline PVA and SoCAS has increased breaking stress of nanostructure. Besides, the CuO NP additive improved the breaking strength and elongation behavior of mats. It was stated that cross‐linked nanofibers swelled without dissolving in distilled water and contained water‐repellent groups. The CuO NP supplementation delayed the growth of Escherichia coli (E. coli). However, it was observed that antibacterial effect against Staphylococcus aureus (S. aureus) was higher than against E. coli. It was reported that 5 % CuO NP‐doped nanofiber can be used as a wound dressing, owing to its high fibroblast cell viability at 24th and 48th hours and 99.48 % antibacterial activity against S. aureus.

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Production of flexible nanocomposite membranes for x-ray detectors

Cited by 10 publications

References 31 publications

Effect of metal oxides added onto polyvinyl alcohol via pulsed underwater plasma on their thermal, electrical and dielectric properties

Effect of metal oxides added onto polyvinyl alcohol via pulsed underwater plasma on their thermal, electrical and dielectric properties

Investigation of x‐ray response for flexible nanocomposite membranes of metal oxides and poly(vinyl alcohol)

Potential Wound Dressing with Antibacterial Effect from Cross‐Linked Polyvinyl Alcohol/Sodium Caseinate/CuO NP Electrospun Mat

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