Silane Modification of Cellulose Acetate Dense Films as Materials for Acid Gas Removal

Carine S. K. Achoundong; Nitesh Bhuwania; Steven K. Burgess; Oguz Karvan; Justin R. Johnson; William J. Koros

doi:10.1021/ma4010583

Silane Modification of Cellulose Acetate Dense Films as Materials for Acid Gas Removal

Carine S. K. Achoundong, Nitesh Bhuwania, Steven K. Burgess, Oguz Karvan, Justin R. Johnson, William J. Koros

Research output: Contribution to journal › Article › peer-review

107 Scopus citations

Abstract

The modification of cellulose acetate (CA) films via grafting of vinyltrimethoxysilane (VTMS) to -OH groups, with subsequent condensation of hydrolyzed methoxy groups on the silane to form a polymer network is presented. The technique is referred to as GCV-modification. The modified material maintains similar H2S/CH4 and CO2/CH 4 selectivities compared to the unmodified material; however the pure CO2 and H2S permeabilities are 139 and 165 barrers, respectively, which are more than an order of magnitude higher than the neat polymer. The membranes were tested at feed pressures of up to 700 psia in a ternary 20 vol. %H2S/20 vol. % CO2/60 vol. % CH 4 mixture. Even under aggressive feed conditions, GCV-modified CA showed comparable selectivities and significantly higher permeabilities. Furthermore, GCV-modified membrane had a lower Tg, lower crystallinity, and higher flexibility than neat CA. The higher flexibility is due to the vinyl substituent provided by VTMS, thereby reducing brittleness, which could be helpful in an asymmetric membrane structure. © 2013 American Chemical Society.

Original language	English (US)
Pages (from-to)	5584-5594
Number of pages	11
Journal	Macromolecules
Volume	46
Issue number	14
DOIs	https://doi.org/10.1021/ma4010583
State	Published - Jul 9 2013
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors would like to thank KAUST for funding this project. The authors would also like to thank Johannes E. Leisen at the Georgia Tech NMR Center for his help on solid-state NMR measurements and Jose Baltazar and Andac Armutlulu for their help with XPS measurements.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

Access to Document

10.1021/ma4010583

Cite this

@article{c6a5b85d6c844bf2b52b162b27f3d6eb,

title = "Silane Modification of Cellulose Acetate Dense Films as Materials for Acid Gas Removal",

abstract = "The modification of cellulose acetate (CA) films via grafting of vinyltrimethoxysilane (VTMS) to -OH groups, with subsequent condensation of hydrolyzed methoxy groups on the silane to form a polymer network is presented. The technique is referred to as GCV-modification. The modified material maintains similar H2S/CH4 and CO2/CH 4 selectivities compared to the unmodified material; however the pure CO2 and H2S permeabilities are 139 and 165 barrers, respectively, which are more than an order of magnitude higher than the neat polymer. The membranes were tested at feed pressures of up to 700 psia in a ternary 20 vol. %H2S/20 vol. % CO2/60 vol. % CH 4 mixture. Even under aggressive feed conditions, GCV-modified CA showed comparable selectivities and significantly higher permeabilities. Furthermore, GCV-modified membrane had a lower Tg, lower crystallinity, and higher flexibility than neat CA. The higher flexibility is due to the vinyl substituent provided by VTMS, thereby reducing brittleness, which could be helpful in an asymmetric membrane structure. {\textcopyright} 2013 American Chemical Society.",

author = "Achoundong, {Carine S. K.} and Nitesh Bhuwania and Burgess, {Steven K.} and Oguz Karvan and Johnson, {Justin R.} and Koros, {William J.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The authors would like to thank KAUST for funding this project. The authors would also like to thank Johannes E. Leisen at the Georgia Tech NMR Center for his help on solid-state NMR measurements and Jose Baltazar and Andac Armutlulu for their help with XPS measurements. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2013",

month = jul,

day = "9",

doi = "10.1021/ma4010583",

language = "English (US)",

volume = "46",

pages = "5584--5594",

journal = "Macromolecules",

issn = "0024-9297",

publisher = "American Chemical Society",

number = "14",

}

TY - JOUR

T1 - Silane Modification of Cellulose Acetate Dense Films as Materials for Acid Gas Removal

AU - Achoundong, Carine S. K.

AU - Bhuwania, Nitesh

AU - Burgess, Steven K.

AU - Karvan, Oguz

AU - Johnson, Justin R.

AU - Koros, William J.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The authors would like to thank KAUST for funding this project. The authors would also like to thank Johannes E. Leisen at the Georgia Tech NMR Center for his help on solid-state NMR measurements and Jose Baltazar and Andac Armutlulu for their help with XPS measurements. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2013/7/9

Y1 - 2013/7/9

N2 - The modification of cellulose acetate (CA) films via grafting of vinyltrimethoxysilane (VTMS) to -OH groups, with subsequent condensation of hydrolyzed methoxy groups on the silane to form a polymer network is presented. The technique is referred to as GCV-modification. The modified material maintains similar H2S/CH4 and CO2/CH 4 selectivities compared to the unmodified material; however the pure CO2 and H2S permeabilities are 139 and 165 barrers, respectively, which are more than an order of magnitude higher than the neat polymer. The membranes were tested at feed pressures of up to 700 psia in a ternary 20 vol. %H2S/20 vol. % CO2/60 vol. % CH 4 mixture. Even under aggressive feed conditions, GCV-modified CA showed comparable selectivities and significantly higher permeabilities. Furthermore, GCV-modified membrane had a lower Tg, lower crystallinity, and higher flexibility than neat CA. The higher flexibility is due to the vinyl substituent provided by VTMS, thereby reducing brittleness, which could be helpful in an asymmetric membrane structure. © 2013 American Chemical Society.

AB - The modification of cellulose acetate (CA) films via grafting of vinyltrimethoxysilane (VTMS) to -OH groups, with subsequent condensation of hydrolyzed methoxy groups on the silane to form a polymer network is presented. The technique is referred to as GCV-modification. The modified material maintains similar H2S/CH4 and CO2/CH 4 selectivities compared to the unmodified material; however the pure CO2 and H2S permeabilities are 139 and 165 barrers, respectively, which are more than an order of magnitude higher than the neat polymer. The membranes were tested at feed pressures of up to 700 psia in a ternary 20 vol. %H2S/20 vol. % CO2/60 vol. % CH 4 mixture. Even under aggressive feed conditions, GCV-modified CA showed comparable selectivities and significantly higher permeabilities. Furthermore, GCV-modified membrane had a lower Tg, lower crystallinity, and higher flexibility than neat CA. The higher flexibility is due to the vinyl substituent provided by VTMS, thereby reducing brittleness, which could be helpful in an asymmetric membrane structure. © 2013 American Chemical Society.

UR - http://hdl.handle.net/10754/599371

UR - https://pubs.acs.org/doi/10.1021/ma4010583

UR - http://www.scopus.com/inward/record.url?scp=84880655774&partnerID=8YFLogxK

U2 - 10.1021/ma4010583

DO - 10.1021/ma4010583

M3 - Article

SN - 0024-9297

VL - 46

SP - 5584

EP - 5594

JO - Macromolecules

JF - Macromolecules

IS - 14

ER -

Silane Modification of Cellulose Acetate Dense Films as Materials for Acid Gas Removal

Abstract

Bibliographical note

Access to Document

Other files and links

Fingerprint

Cite this