Gas sorption and permeation of glassy polymers with microvoids

Tsujita, Yoshiharu

doi:10.1016/s0079-6700(03)00048-0

Cited by 148 publications

(95 citation statements)

References 96 publications

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“…Such behavior is known for sorption of gases and vapors in glassy-polymer membranes comprising frozen free volume voids. [33,34] This finding indicates that the sorption process may occur through two mechanisms. The first, which is described by the Langmuir sorption model, suggests the presence of selective binding sites.…”

Section: Resultsmentioning

confidence: 81%

Vapor Sorption and Electrical Response of Au‐Nanoparticle– Dendrimer Composites

Krasteva¹,

Fogel

Bauer

et al. 2007

Adv Funct Materials

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Films comprising Au nanoparticles and polyphenylene dendrimers (first and second generation) are deposited onto transducer substrates via layer‐by‐layer self‐assembly and characterized by atomic force microscopy and X‐ray photoelectron spectroscopy. Their sorption behavior is studied by measuring the uptake of solvents from the vapor phase with quartz crystal microbalances (QCMs). The resistance of the films is simultaneously monitored. Both sensor types, QCMs and chemiresistors, give qualitatively very similar response isotherms that are consistent with a combination of Henry‐ and Langmuir‐type sorption processes. The sorption‐induced increase in relative differential resistance scales linearly with the amount of analyte accumulated in the films. This result is in general agreement with an activated tunneling process for charge transport, if little swelling and only small changes in the permittivity of the film occur during analyte sorption (a first‐order approximation). The relative sensitivity of the films to different solvents decreases in the order toluene ≈ tetrachloroethylene > 1‐propanol ≫ water. Films containing the larger second‐generation dendrimers show higher sensitivity than films containing first‐generation dendrimers.

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Section: Resultsmentioning

confidence: 81%

Vapor Sorption and Electrical Response of Au‐Nanoparticle– Dendrimer Composites

Krasteva¹,

Fogel

Bauer

et al. 2007

Adv Funct Materials

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“…20.2, and V p is the molar volume of sorbant gas (in ml) [9]. The parameter b is the hole affinity constant and characterizes the tendency of a given penetrant to sorb into the excess unrelaxed volume in the nonequilibrium matrix [10].…”

Section: Glassy Polymersmentioning

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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“…Transport is assumed to occur mainly through the dense matrix, so permeabilities are generally low and small molecules are usually more permeable than larger molecules. [1] For a microporous membrane, other mechanisms come into play, such as sorption onto pore walls coupled with surface diffusion, in which case a large, strongly adsorbing species can inhibit transport of a smaller molecule with weaker interactions. [2] Microporous (pore size < 2 nm) and mesoporous (pore size 2±50 nm) materials find application for separation, adsorption, and heterogeneous catalysis because of their large and accessible surface areas.…”

mentioning

confidence: 99%

Solution‐Processed, Organophilic Membrane Derived from a Polymer of Intrinsic Microporosity

Budd¹,

et al. 2004

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A polymer with a rigid, randomly contorted molecular structure (see Figure), incorporating fused rings connected by spiro‐centres, may be precipitated or cast from solution to give microporous powders and membranes stable up to temperatures of 350 °C, with apparent surface areas > 600 m2 g–1. Organophilic membranes may be formed, as demonstrated by the separation of phenol from water by pervaporation.

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Gas sorption and permeation of glassy polymers with microvoids

Cited by 148 publications

References 96 publications

Vapor Sorption and Electrical Response of Au‐Nanoparticle– Dendrimer Composites

Vapor Sorption and Electrical Response of Au‐Nanoparticle– Dendrimer Composites

Recent Developments in the Permeability of Polymer Clay Nanocomposites

Solution‐Processed, Organophilic Membrane Derived from a Polymer of Intrinsic Microporosity

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