PEG/PPG–PDMS-Based Cross-Linked Copolymer Membranes Prepared by ROMP and In Situ Membrane Casting for CO2 Separation: An Approach to Endow Rubbery Materials with Properties of Rigid Polymers
- Authors
- Hossain, Iqubal; Kim, Dongyoung; Al Munsur, Abu Zafar; Roh, Jong Min; Park, Ho Bum; Kim, Tae-Hyun
- Issue Date
- Jun-2020
- Publisher
- AMER CHEMICAL SOC
- Keywords
- gas separation; rubbery polymer membrane; ROMP polymerization; interlocked-network structure; rigid polymer properties
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.12, no.24, pp.27286 - 27299
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 12
- Number
- 24
- Start Page
- 27286
- End Page
- 27299
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/2054
- DOI
- 10.1021/acsami.0c06926
- ISSN
- 1944-8244
- Abstract
- Rubbery polymer membranes prepared from CO2-philic PEO and/or highly permeable PDMS are desired for efficient CO2 separation from light gases (CH4 and N2). Poor mechanical properties and size-sieving ability, however, limit their application in gas separation applications. Cross-linked rubbery polymer-based gas separation membranes with a low Tg based on both PEG/PPG and PDMS units with various compositions between these two units are prepared for the first time in this work by ring-opening metathesis polymerization type cross-linking and in situ membrane casting. The developed membranes display excellent CO2 separation performance with CO2 permeability ranging from 301 to 561 Barrer with excellent CO2/N2 selectivity ranging from 50 to 59, overcoming the Robeson upper bound (2008). The key finding underlying the excellent performance of the newly developed cross-linked x(PEG/PPG:PDMS) membranes is the formation of a well-connected interlocked network structure, which endows the rubbery materials with the properties of rigid polymers, e.g., size-sieving ability and high thermomechanical stability. Moreover, the membrane shows long-term antiaging performance of up to eight months and antiplasticization behavior up to 25 atm pressure.
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