Sorption of organic solvents into dense silicone membranes. Part 2.—Development of a new approach based on a clustering hypothesis for associated solvents

Favre, Éric; Clément, Robert; Nguyen, Quang Trong; Schaetzel, Pierre; Néel, Jean

doi:10.1039/ft9938904347

Cited by 38 publications

(24 citation statements)

References 11 publications

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“…Flory-Huggins theory predicts sorption behaviour of many organic solvents into PDMSlike membranes [15], although polar solvents such as alcohols require a more sophisticated approach [16]. The diffusion of penetrant molecules through polymer networks can be ideal (Fickian) or non-ideal (non-Fickian).…”

Section: Chemical Transportmentioning

confidence: 99%

Solvent flux through dense polymeric nanofiltration membranes

Robinson

Tarleton

Millington

et al. 2004

Journal of Membrane Science

144

105

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Citation: ROBINSON, J.P. ... et al, 2004. Solvent flux through dense polymeric nanofiltration membranes.Journal of Membrane Science, 230 (1-2), pp. [29][30][31][32][33][34][35][36][37] Additional Information:• ABSTRACTThis work examines the flux performance of organic solvents through a polydimethylsiloxane (PDMS) composite membrane. A selection of n-alkanes, i-alkanes and cyclic compounds were studied in deadend permeation experiments at pressures up to 900 kPa to give fluxes for pure solvents and mixtures between 10 and 100 l m -2 h -1. Results for the chosen alkanes and aromatics, and subsequent modelling using the Hagen-Poiseuille equation, suggest that solvent transport through PDMS can be successfully interpreted via a predominantly hydraulic mechanism. It is suggested that the mechanism has a greater influence at higher pressures and the modus operandi is supported by the non-separation of binary solvent mixtures and a dependency on viscosity and membrane thickness. The effects of swelling that follow solvent-membrane interactions show that the relative magnitudes of the Hildebrand solubility parameter for the active membrane layer and the solvent(s) are a good indicator of permeation level. Solvents constituting a group (e.g. all n-alkanes) induced similar flux behaviours when corrections were made for viscosity and affected comparable swelling properties in the PDMS membrane layer.

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Section: Chemical Transportmentioning

confidence: 99%

Solvent flux through dense polymeric nanofiltration membranes

Robinson

Tarleton

Millington

et al. 2004

Journal of Membrane Science

144

105

View full text Add to dashboard Cite

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“…The k p and k s parameters obtained from the fitting are shown in Table S5 in Supporting Information. It can be seen that PLA shows the highest k s value, 4.89, which is related to the cluster formation, and with the incorporation of 5% PEG, the value is decreased. However, for higher PEG contents, it starts to increase.…”

Section: Resultsmentioning

confidence: 95%

“…Taking into account that in these blends, the isotherms tend to turn up at high activities and that clustering could occur the engaged species induced clustering model (ENSIC) has been applied . This model assumes that the insertion of a penetrant molecule is ruled by the affinity of the penetrant and the polymer segment ( k p ) and the affinity between the penetrant and the already absorbed penetrant ( k s ).…”

Section: Resultsmentioning

confidence: 99%

Plasticization of poly(lactide) with poly(ethylene glycol): Low weight plasticizer vs triblock copolymers. Effect on free volume and barrier properties

Chaos

Sangroniz

Fernández

et al. 2019

J of Applied Polymer Sci

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In order to make poly(lactide) (PLA) suitable for food packaging applications, its toughness must be improved. In this work, the plasticization effectiveness of a low-molecular-weight plasticizer and a triblock copolymer are analyzed. For this purpose, PLA is blended with poly(ethylene glycol) (PEG) and poly(lactide-ethylene glycol-lactide) (LA-EG-LA) triblock copolymer. The obtained results show that copolymers are more effective, reducing the glass transition temperature of PLA. Although PLA/PEG blends have been widely studied in the literature, the barrier character has not been analyzed, which is of paramount importance for packaging applications. Therefore, the permeability to carbon dioxide, oxygen, and water vapor of PLA/PEG blends has been characterized observing an increase with the incorporation of PEG, which is the expected behavior. However, the incorporation of LA-EG-LA copolymers leads to permeability values that are slightly higher, similar, or even lower than PLA. Furthermore, the free volume of the samples has been analyzed in order to gain a deeper insight on the factors affecting the transport properties. Overall, this works aims to provide a better understanding towards the design of biodegradable packaging with improved properties that could be also extended to other biodegradable polymers.PLA blends containing PEG have been widely analyzed in the literature. [9][10][11][12][13][14][15] Younes and Cohn 9 studied PLA blends containing PEG of different molecular weights (1500-35 000 g/mol range) at different composition observing a microphase separation. Hu et al. observed that PLA containing more than 15% PEG were not stable over time and phase separation occurs forming PLA rich and PEG rich domains. [10][11][12] The phase separation of PLA and PEG has been Additional Supporting Information may be found in the online version of this article.

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“…Given that solubility is the limiting step in VOC permeation through rubbery polymers, one can infer that propylene transport depends on its inherent solubility in the PDMS membrane, which is relatively low. The effect of VOC components on permeation of other could be better explained in terms of thermodynamic parameters using Flory-Huggins interaction parameters or engaged species induced clustering (ENSIC) model [49,[51][52][53]. However, such an analysis was beyond the scope of this paper.…”

Section: Comparison Of the Voc Single Voc/air And Binary Mixtures Permentioning

confidence: 96%

Vapour permeation of VOC emitted from petroleum activities: Application for low concentrations

Rebollar-Pérez

Carretier

Lesage

et al. 2012

Journal of Industrial and Engineering Chemistry

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Sorption of organic solvents into dense silicone membranes. Part 2.—Development of a new approach based on a clustering hypothesis for associated solvents

Cited by 38 publications

References 11 publications

Solvent flux through dense polymeric nanofiltration membranes

Solvent flux through dense polymeric nanofiltration membranes

Plasticization of poly(lactide) with poly(ethylene glycol): Low weight plasticizer vs triblock copolymers. Effect on free volume and barrier properties

Vapour permeation of VOC emitted from petroleum activities: Application for low concentrations

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