On the Extraction of Diffusion Coefficients from Gravimetric Data for Sorption of Small Molecules by Polymer Thin Films

Balik, C. M.

doi:10.1021/ma9509467

Cited by 115 publications

(76 citation statements)

References 2 publications

(3 reference statements)

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“…These methods present, however, an uncertainty in the time interval over which they are valid. A more detailed description of methods that are used to extract the diffusion coefficients from gravimetric data is presented in [15,16]. Generally, the diffusion mechanism follows equation where K depends on the structural features of the polymer and n determines the diffusion mechanism [17].…”

Section: Sorption/desorption Experimentsmentioning

confidence: 99%

Recent Developments in the Permeability of Polymer Clay Nanocomposites

Choudalakis

Gotsis

2013

Handbook of Polymernanocomposites. Processing, Performance and Application

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Section: Sorption/desorption Experimentsmentioning

confidence: 99%

Recent Developments in the Permeability of Polymer Clay Nanocomposites

Choudalakis

Gotsis

2013

Handbook of Polymernanocomposites. Processing, Performance and Application

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“…As a general rule, membrane material changes affect the diffusion coefficient of a permeant much more than the sorption coefficient. Diffusion of vapors or liquids through polymeric materials is a complex process whose quantitative analysis is not trivial and still remains subject to debate [54,55]. Diffusion behavior can be classified into three categories [56]: (i) Fickian diffusion, in which the rate of diffusion is much less than that of sorption and the sorption equilibrium is rapidly established.…”

Section: Fundamental Theorymentioning

confidence: 99%

Segmented shape memory polyurethane and its water vapor transport properties

Mondal¹,

Hu²

2006

Designed Monomers and Polymers

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Abstract-An attempt has been made to review the influences of different structural factors on physical and water vapor transport properties of segmented shape memory polyurethane (SPU) for breathable textile, biomedical and many other industrial applications. The differences between ordinary, segmented and segmented shape memory polyurethanes have been reviewed. The principle of temperature-sensitive SPU has been stated. Water vapor transport through dense segmented polyurethane is a collective process of diffusion and sorption and, hence, the permeability of mass molecules through dense membrane depends on both diffusion and sorption. Therefore, the study of different structural factors on water vapor transport properties are important, in order to enhance the permeability of non-porous membranes. The effects of different structural factors, viz., hard and soft segment, functional groups, hydrophilic groups, crystallites and additives on permeability have also been included in this review article.

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“…While numerous methodologies have been proposed for this purpose, [32] we elect to use the Balik [33] model, which fits the entire sorption curve with a single expression that accounts for molecular diffusion at short and long time (t) with a constant value of D eff . The mass uptake of CHCl 3 can be expressed as…”

Section: Sorption and Swelling Behaviormentioning

confidence: 99%

Effects of Pressure and Nanoparticle Functionality on CO₂‐Selective Nanocomposites Derived from Crosslinked Poly(ethylene glycol)

Patel

Zielinski

Samseth

et al. 2004

Macro Chemistry & Physics

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Summary: Purification of H2 generated from industrial gasification processes requires removal of CO2 as the permeate from mixed CO2/H2 streams to avoid costly H2 repressurization. Such gas separation can be achieved through the use of reverse‐selective polymer membranes that exhibit high CO2 affinity. In this work, the physical properties of CO2‐selective membranes composed of poly(ethylene glycol) diacrylate (PEGda), as well as PEGda nanocomposites with 10 wt.‐% fumed silica (FS), are reported. Two PEGda oligomers differing in chain length and FS nanoparticles varying in surface functionality are exposed to CO2 at low and high pressures to elucidate the roles of CO2 pressure, network topology and nanoparticle aggregation on molecular transport and solubility. Results from swelling and sorption kinetics confirm that both penetrant diffusivity and solubility increase with increasing PEGda chain length and decreasing network density. Methacrylate‐terminated FS nanoparticles are more effective in improving rheological properties and retaining high CO2 selectivity than hydroxyl‐terminated nanoparticles of comparable size.

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On the Extraction of Diffusion Coefficients from Gravimetric Data for Sorption of Small Molecules by Polymer Thin Films

Cited by 115 publications

References 2 publications

Recent Developments in the Permeability of Polymer Clay Nanocomposites

Recent Developments in the Permeability of Polymer Clay Nanocomposites

Segmented shape memory polyurethane and its water vapor transport properties

Effects of Pressure and Nanoparticle Functionality on CO₂‐Selective Nanocomposites Derived from Crosslinked Poly(ethylene glycol)

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On the Extraction of Diffusion Coefficients from Gravimetric Data for Sorption of Small Molecules by Polymer Thin Films

Cited by 115 publications

References 2 publications

Recent Developments in the Permeability of Polymer Clay Nanocomposites

Recent Developments in the Permeability of Polymer Clay Nanocomposites

Segmented shape memory polyurethane and its water vapor transport properties

Effects of Pressure and Nanoparticle Functionality on CO2‐Selective Nanocomposites Derived from Crosslinked Poly(ethylene glycol)

Contact Info

Product

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Effects of Pressure and Nanoparticle Functionality on CO₂‐Selective Nanocomposites Derived from Crosslinked Poly(ethylene glycol)