Transport of Gases and Vapors in Glassy and Rubbery Polymers

Matteucci, Scott; Yampolskii, Yuri; Freeman, Benny D.; Pinnau, Ingo

doi:10.1002/047002903x.ch1

Cited by 287 publications

(399 citation statements)

References 2 publications

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“…Therefore, bubbles that did not have time to cross the membrane rapidly, dissolved into the PCR mixture during low temperature. Permeability increases exponentially with temperature, 25 and as shown previously, 29 water loss is considerably reduced during thermocycling as compared to static exposure at 96°C, which agrees with the results in Fig. 2C.…”

Section: Multiplex On-chip Pcr With Debubblingsupporting

confidence: 93%

“…2D). Permeability dependence on the amount of Teflon coatings was calculated 25 for water and air at cross-membrane pressure drops of 90, 50, 25, 20 and 15 kPa (Fig. 2D and E).…”

Section: Permeability and Debubbling Efficiency Measurementsmentioning

confidence: 99%

“…1,2,15 A common problem for all bubble extraction methods is loss of liquid during the extraction. PDMS-based debubbling systems suffer especially from water loss, since the polymer is considerably more permeable to water vapour than to air, 25 leading to significant loss of water in PDMS-based debubbling systems. Water loss is especially problematic for high-temperature applications, and has been observed as a source for failure in on-chip PCR.…”

Section: Introductionmentioning

confidence: 99%

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Active liquid degassing in microfluidic systems

Karlsson

Gazin

Laakso³

et al. 2013

Lab Chip

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We present a method for efficient air bubble removal in microfluidic applications. Air bubbles are extracted from a liquid chamber into a vacuum chamber through a semipermeable membrane, consisting of PDMS coated with amorphous Teflon ® AF 1600. Whereas air is efficiently extracted through the membrane, water loss is greatly reduced by the Teflon even at elevated temperatures. We present the water loss and permeability change with the amount of added Teflon AF to the membrane. Also, we demonstrate bubble-free, multiplex DNA amplification using PCR in a PDMS microfluidic device.

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Section: Multiplex On-chip Pcr With Debubblingsupporting

confidence: 93%

“…2D). Permeability dependence on the amount of Teflon coatings was calculated 25 for water and air at cross-membrane pressure drops of 90, 50, 25, 20 and 15 kPa (Fig. 2D and E).…”

Section: Permeability and Debubbling Efficiency Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Active liquid degassing in microfluidic systems

Karlsson

Gazin

Laakso³

et al. 2013

Lab Chip

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“…sorption induced swelling of the polymer matrix, causing an increased polymer chain mobility and consequently increased gas permeability. For 6FDA-DAM polymer, plasticization with CO 2 takes place at pressures higher than 10 bar [55]. Therefore, plasticization is excluded to interfere under the studied conditions.…”

Section: Journal Of Membrane Science 550 (2018) 198-207mentioning

confidence: 99%

High performance mixed matrix membranes (MMMs) composed of ZIF-94 filler and 6FDA-DAM polymer

Etxeberría-Benavides

David

Johnson

et al. 2018

Journal of Membrane Science

103

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A R T I C L E I N F O Keywords:Metal organic frameworks ZIF-94 Mixed matrix membrane CO 2 capture A B S T R A C T Carbon capture and storage (CCS) using membranes for the separation of CO 2 holds great promise for the reduction of atmospheric CO 2 emissions from fuel combustion and industrial processes. Among the different process outlines, post-combustion CO 2 capture could be easily implemented in existing power plants. However, for this technology to become viable, new membrane materials have to be developed. In this article we present the development of high performance mixed matrix membranes (MMMs) composed of ZIF-94 filler and 6FDA-DAM polymer matrix. The CO 2 /N 2 separation performance was evaluated by mixed gas tests (15CO 2 :85N 2 ) at 25°C and 1-4 bar transmembrane pressure difference. The CO 2 membrane permeability was increased by the addition of the ZIF-94 particles, maintaining a constant CO 2 /N 2 selectivity of~22. The largest increase in CO 2 permeability of~200% was observed for 40 wt% ZIF-94 loading, reaching the highest permeability (2310 Barrer) at similar selectivity among 6FDA-DAM MMMs reported in literature. For the first time, the ZIF-94 metal organic framework crystals with particle size smaller than 500 nm were synthesized using nonhazardous solvent (tetrahydrofuran and methanol) instead of dimethylformamide (DMF) in a scalable process. Membranes were characterized by three non-invasive image techniques, i.e. SEM, AFM and nanoscale infrared imaging by scattering-type scanning near-field optical microscopy (s-SNOM). The combination of these techniques demonstrates a very good dispersion and interaction of the filler in the polymer layer, even at very high loadings.

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“…It is worth mentioning that the original 1991 Robeson's bound, as pointed out by It is known 28 that diffusivity can be correlated with FFV, according to Fujita's theory 29 of diffusion, as:…”

Section: Permeability and Selectivitymentioning

confidence: 99%

Helium Recovery by Membrane Gas Separation Using Poly(o-acyloxyamide)s

Díez

Cuadrado

Marcos‐Fernández

et al. 2014

Ind. Eng. Chem. Res.

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Poly-o-acyloxyamides (PORAs) derived from a poly(ortho-hydroxyamide) from the 2,2'-Bis(3-amino-4-hydroxyphenyl) hexafluoropropane (APAF) diamine, APAF-POHA, have been synthesized and evaluated as gas separation materials. These polymers were made from poly(o-hydroxyamides) by derivatization of the free OH group with an aliphatic acid dichloride or dianhydride that allowed the introduction of acetyl or pivaloyl groups on their structure. All of them showed low-medium thermal stability due to a degradation of the amide moieties and most of them (those synthesized from isophthaloyl dichloride (IPC), 2,2'-bis(4-carboxyphenyl) hexafluoropropane dichloride (6FC) and 4,4'-dicarboxydiphenylsulfone dichloride (DPSC)) showed good mechanical properties.These poly-o-acyloxyamides have shown good permselectivities for He/N 2 and He/CH 4 separations and very good permeability-selectivity balance for the He/CO 2 separation.The acetyl PORAs showed better permeability versus selectivity balance than the pivaloyl ones. Moreover, selectivity increased while permeability decreased in the sequence: 6F-APAF -> IP-APAF -> DPS-APAF Intersegmental distances, d-spacing values, were shown to decrease along this sequence obtaining a nice correlation between permeability and d-spacing.

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Transport of Gases and Vapors in Glassy and Rubbery Polymers

Cited by 287 publications

References 2 publications

Active liquid degassing in microfluidic systems

Active liquid degassing in microfluidic systems

High performance mixed matrix membranes (MMMs) composed of ZIF-94 filler and 6FDA-DAM polymer

Helium Recovery by Membrane Gas Separation Using Poly(o-acyloxyamide)s

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