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Highly Permeable Oligo(ethylene oxide)-co-poly(dimethylsiloxane) Membranes for Carbon Dioxide Separation

Journal Article · · Advanced Sustainable Systems
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  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of California, Riverside, CA (United States)
  4. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
+ Show Author Affiliations
Here, a series of cross–linked, freestanding oligo(ethylene oxide)–co–(polydimethylsiloxane–norbornene) membranes with varied composition is synthesized via in situ ring–opening metathesis polymerization. These membranes show remarkably high CO2 permeabilities (3400 Barrer) and their separation performance approaches the Robeson upper bound. The excellent permeability of these copolymer membranes provides great potential for real–world applications where enormous volumes of gases must be separated. The gas transport properties of these films are found to be directly proportional to oligo(ethylene oxide) content incorporation, which stems from the increased solubility selectivity change within the copolymer matrix. This work provides a systematic study of how gas separation performance in rubbery membranes can be enhanced by tuning the CO2–philicity of their constituent monomeric subunits.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1456782
Alternate ID(s):
OSTI ID: 1414957
Journal Information:
Advanced Sustainable Systems, Journal Name: Advanced Sustainable Systems Journal Issue: 4 Vol. 2; ISSN 2366-7486
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (11)

Figure 1(p. 17)figure Figure 1
Scheme 1(p. 17)figure Scheme 1
Figure 2(p. 18)figure Figure 2
Figure 3(p. 18)figure Figure 3
Figure 4(p. 19)figure Figure 4
Table 1(p. 19)table Table 1
Table 2(p. 20)table Table 2
Figure S1(p. 21)figure Figure S1
Table S1(p. 21)table Table S1
Figure S2(p. 22)figure Figure S2
Figure S3(p. 23)figure Figure S3

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CO2-philic
high permeability
membrane gas separation
oligo(ethylene oxide)
polydimethylsiloxane