Gas permeability and permselectivity properties of ethylene vinyl acetate/sepiolite mixed matrix membranes

Adelnia, Hossein; Bidsorkhi, Hossein Cheraghi; Ismail, Ahmad Fauzi; Matsuura, Takeshi

doi:10.1016/j.seppur.2015.03.060

Cited by 61 publications

(28 citation statements)

References 37 publications

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“…For example, Sadeghi et al reported that the addition of silica reduced crystallinity percentage of EVA. Adelnia et al observed the same behavior in EVA/sepiolite mixed matrix membranes. However, Chaudhary et al reported no change in crystallinity of EVA composites containing montmorillonite‐based organo‐modified clays.…”

Section: Resultsmentioning

confidence: 57%

Development of Ethylene-Vinyl Acetate Composites Reinforced with Graphene Platelets

Soheilmoghaddam

Adelnia

Bidsorkhi

et al. 2016

Macromol. Mater. Eng.

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Composites of ethylene‐vinyl acetate (EVA) reinforced with graphene platelets are fabricated. Morphological, thermal, mechanical, electrical properties as well as moisture absorption of the composites are characterized. Transmission electron microscopy shows a good dispersion of graphene platelets in the matrix. The unidirectional orientation of graphene platelets parallel to the surface of the composites is revealed by field emission scanning electron microscopy and is validated using the Halpin–Tsai model. Tensile strength and elongation of the composites are respectively improved by 109 and 83%, after the addition of 3 wt% graphene platelets. The incorporation of 5 wt% graphene platelets enhances the char residue of the composites from 0.544% for pure EVA to 6.63% for the composites. The electrical conductivity of the composite with 3 wt% graphene platelets is two orders of magnitude higher than that of pure EVA with 10−13 S cm–1 electrical conductivity.

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Section: Resultsmentioning

confidence: 57%

Development of Ethylene-Vinyl Acetate Composites Reinforced with Graphene Platelets

Soheilmoghaddam

Adelnia

Bidsorkhi

et al. 2016

Macromol. Mater. Eng.

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“…Cyclic freezing-thawing of PVA solution results in phase separation of the growing ice crystals from polymer chains. The ice crystals push away polymer-enriched regions, and then the phase separated PVA regions are crystallized and form inter-and intra-molecular hydrogen bonding interactions, consisting the junctions of the formed networks [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Silver nanoparticles (AgNPs) can be considered as one of the most promising candidates, leading to both excellent antibacterial and mechanical properties if its uniform dispersion in the host matrix is achieved [5,13,[22][23][24][25][26]. One facile strategy is to synthesize AgNPs in situ in the matrix, that is, reduction of Ag 1 ions, for which both suitable reducing agent and stabilizer are required [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Anti‐bacterial poly(vinyl alcohol) nanocomposite hydrogels reinforced within situsynthesized silver nanoparticles

et al. 2018

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This work describes fabrication and properties of anti‐bacterial poly(vinyl alcohol)/silver nanoparticles (PVA/AgNPs) nanocomposite hydrogels prepared via cyclic freeze‐thaw. The AgNPs, at different concentrations, were synthesized in situ in PVA solution, without employing either capping or reducing agent. Stable AgNPs with the average diameter of 16 nm uniformly dispersed in PVA was obtained. The presence of 2 wt% of AgNPs enhanced tensile strength and elongation at break by 40 and 31%, respectively due to extended network formation between AgNPs and PVA. AgNPs also provided the hydrogels with anti‐bacterial capability, while did not change water uptake markedly. Furthermore, the electrical conductivity of 1.5 × 105 S cm−1 was achieved by the addition of as low as 2 wt% of AgNPs. POLYM. COMPOS., 40:1322–1328, 2019. © 2018 Society of Plastics Engineers

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“…. Characteristic peaks of EVA are at 1,734 (CO), 1,234 (COC), 1,018 (COC), and 607 cm −1 (CO), ascribing to the absorption bands of vinyl acetate groups and 2,915, 2,846, 1,460, 1,367, and 720 cm −1 , assigning to the bands of ethylene groups . The absorption band at 1,735 cm −1 which is attributed to the carbonyl groups of vinyl acetate is of great importance as this band can be shifted to the lower wavenumbers when these groups are hydrogen bonded with a suitable hydrogen donor molecule.…”

Section: Resultsmentioning

confidence: 99%

Ethylene vinyl acetate copolymer nanocomposites based on (un)modified sepiolite: Flame retardancy, thermal, and mechanical properties

et al. 2015

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Flame retardant ethylene-vinyl acetate (EVA) nanocomposites were prepared by melt blending using unmodified and modified sepiolite. Modification process of sepiolite was carried out by using 3-aminopropyltrimethoxysilane in water/ethanol medium. Thermal, mechanical, and flame retardancy properties of the prepared nanocomposites were evaluated and compared with each other. X-ray diffraction and scanning electron microscopy indicated that sepiolite fibers are well-dispersed in EVA matrix. By the addition of (un)modified sepiolite, both flame retardancy and thermal stability characteristics first improved, and then deteriorated, indicating a direct relationship between these properties. It was also found that sepiolite protects carbonyl groups of EVA from further degradation. Most interestingly, a simultaneous increase in both ductility and toughness was observed in the prepared composites. Whatever the evaluated properties were, whether the mechanical, thermal, or flame retardancy, the improved properties were more remarkable when modified sepiolite was utilized. POLYM. COMPOS., 00:000-000, 2015.

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Gas permeability and permselectivity properties of ethylene vinyl acetate/sepiolite mixed matrix membranes

Cited by 61 publications

References 37 publications

Development of Ethylene-Vinyl Acetate Composites Reinforced with Graphene Platelets

Development of Ethylene-Vinyl Acetate Composites Reinforced with Graphene Platelets

Anti‐bacterial poly(vinyl alcohol) nanocomposite hydrogels reinforced within situsynthesized silver nanoparticles

Ethylene vinyl acetate copolymer nanocomposites based on (un)modified sepiolite: Flame retardancy, thermal, and mechanical properties

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