Multifunctional hydrolyzed EVA membranes with tunable microstructure and water barrier properties

Puente, Jorge Arturo Soto; Fatyeyeva, Kateryna; Marais, Stéphane; Dargent, Éric

doi:10.1016/j.memsci.2015.01.008

Cited by 24 publications

(27 citation statements)

References 55 publications

(65 reference statements)

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“…Addition of montmorillonite (MMT) to create a nano-composite blend of PEMA/EVOH led to a 25-fold reduction of the P O 2 and a 12-fold reduction of the P H 2 O . [69] A film of ethylene vinyl acetate (EVA) copolymer was hydrolyzed on both surface sides by Puente et al (2015), creating the structure EVOH/EVA/EVOH. When the hydrolysis time increased, the thickness of the generated EVOH layers was also increased, causing the P H 2 O to decrease due to the crystalline phase of the EVOH layers.…”

Section: Blendsmentioning

confidence: 99%

“…When the hydrolysis time increased, the thickness of the generated EVOH layers was also increased, causing the P H 2 O to decrease due to the crystalline phase of the EVOH layers. [70] More recent studies show the effect of multiplication extrusion, also used for microlayer technology, on blends. Zhu et al (2014) used an assembly of force-assembling elements (FAEs), similar to multipliers, combined with one extruder.…”

Section: Blendsmentioning

confidence: 99%

“…When the hydrolysis time increased, the thickness of the generated EVOH layers was also increased, causing the P H 2 O to decrease due to the crystalline phase of the EVOH layers. [70]…”

Section: Water Vapor Permeability Of Evohmentioning

confidence: 99%

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Recent Updates on the Barrier Properties of Ethylene Vinyl Alcohol Copolymer (EVOH): A Review

et al. 2018

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The gas barrier properties of ethylene vinyl alcohol copolymer (EVOH) against oxygen, carbon dioxide and water vapor have been widely investigated in relation to different material characteristics, environmental conditions and new processing technologies. Recently, EVOH is gaining more attention as a barrier material against other gases and organic substances such as aromas, flavors, fuels, chemicals (e.g., BTEX), and as a functional barrier, e.g., to avoid mineral oil migration. This review contains an update on permeability data of EVOH emphasizing its potential as a barrier material for new and versatile applications in food and pharmaceutical packaging, agriculture, construction, automotive, etc.

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Section: Blendsmentioning

confidence: 99%

Section: Blendsmentioning

confidence: 99%

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Recent Updates on the Barrier Properties of Ethylene Vinyl Alcohol Copolymer (EVOH): A Review

et al. 2018

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“…The peaks at 2852 cm −1 and 2915 cm −1 attribute to symmetric and asymmetric CH 2 stretching vibration respectively. The peak at 1740 cm −1 belongs to the CO stretching vibration absorption in the branched chain of EVA . The intensity of 1740 cm −1 decreases with the increasing absorbed doses at the surface of PP/EVA blends [Figure (a)] while remains constantly in the inner of PP/EVA blends [Figure (b)].…”

Section: Resultsmentioning

confidence: 99%

The observation of PP/EVA blends in which isotactic PP was preradiated with different radiation absorbed doses

Zhang

Li²,

Shen

et al. 2017

J of Applied Polymer Sci

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Isotactic polypropylene (PP) was preradiated by γ ray with different absorbed doses and subsequently blended with ethylene‐vinyl acetate (EVA) co‐polymer to prepare PP/EVA blends. The average molecular weight (Mn) of isotactic PP decreased with the increasing radiation absorbed dose, which indicated that high energy radiation of γ ray broke the isotactic long PP chains into shorter ones. The melt flow rate results evidenced that the processing ability of PP/EVA blends was continuously promoted with the increasing absorbed dose. The β crystal was obtained in the PP/EVA blends by the radiation method. The onset temperatures and peaks of crystallization of PP/EVA blends decreased slightly with the increasing radiation absorbed dose, while high energy radiation was inclined to enhance the crystallinity of PP/EVA blends. The Fourier transform infrared spectroscopy (FTIR) tests confirmed an interesting phenomenon that PP tended to move to the surface of the PP/EVA blends with the increasing radiation absorbed dose. Mechanical tests proved that the PP/EVA blends remained a comparative stable mechanical property under the absorbed dose of 30 kGy. The experimental results indicated that PP/EVA blend was a potential candidate for industrial applying. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45057.

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“…The water permeation measurement is an appropriate method to determine the concentration of water diffused through a polymer film by surface and time units. 45 It seems that barrier behaviour to liquid water for EVA/nanoparticle films is not still considered opening up new opportunities for scientific research. In spite of studies on barrier properties of polymer-based nanocomposites, few are focused on EVA/nanoparticle films even though their physical properties are intensively studied.…”

Section: Water Transport Propertiesmentioning

confidence: 99%

Tunable water barrier properties of EVA by clay insertion?

Wilson

Follain

Tenn

et al. 2015

Phys. Chem. Chem. Phys.

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Organo-modified Cloisite clays at varying contents were incorporated into poly(ethylene-co-vinyl acetate) (EVA) by melt blending. Nanoclay dispersion in films was first evaluated. The water transport properties were investigated by pervaporation and sorption measurements. A decrease of the water permeation flux was obtained when incorporating nanoparticles. This barrier effect is usually attributed to the increase of the diffusion pathways due to nanoclay-induced tortuosity effects. However, the diffusion coefficient was found to be dependent on water concentration, which generally reflects a plasticization effect of water. Besides, at 7 wt% of loading, an unexpected increase of water diffusivity was measured with a time-scale shift of the permeation flux. This was correlated with the formation of preferential diffusion pathways along interfacial regions due to free volumes existing between the EVA matrix and nanoclays as well as the water affinity of microfillers. As a consequence, water mass gain was found to be increased. The water-induced plasticization of sorbed water molecules was also highlighted through sorption kinetics. Eventually, some applications to these films in which water barrier behaviour is required were discussed.

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Multifunctional hydrolyzed EVA membranes with tunable microstructure and water barrier properties

Cited by 24 publications

References 55 publications

Recent Updates on the Barrier Properties of Ethylene Vinyl Alcohol Copolymer (EVOH): A Review

Recent Updates on the Barrier Properties of Ethylene Vinyl Alcohol Copolymer (EVOH): A Review

The observation of PP/EVA blends in which isotactic PP was preradiated with different radiation absorbed doses

Tunable water barrier properties of EVA by clay insertion?

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