Synthesis, Characterization, and CO<sub>2</sub>/N<sub>2</sub> Separation Performance of POEM-<i>g</i>-PAcAm Comb Copolymer Membranes
Alcohol-soluble comb copolymers were synthesized from rubbery poly(oxyethylene methacrylate) (POEM) and glassy polyacrylamide (PAcAm) via economical and facile free-radical polymerization. The synthesis of comb copolymers was confirmed by Fourier-transform infrared and proton nuclear magnetic resona...
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| Format: | Article |
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MDPI AG
2021-01-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/2/177 |
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| author | Byeong Ju Park Na Un Kim Chang Soo Lee Jong Hak Kim |
| author_facet | Byeong Ju Park Na Un Kim Chang Soo Lee Jong Hak Kim |
| author_sort | Byeong Ju Park |
| collection | DOAJ |
| description | Alcohol-soluble comb copolymers were synthesized from rubbery poly(oxyethylene methacrylate) (POEM) and glassy polyacrylamide (PAcAm) via economical and facile free-radical polymerization. The synthesis of comb copolymers was confirmed by Fourier-transform infrared and proton nuclear magnetic resonance spectroscopic studies. The bicontinuous microphase-separated morphology and amorphous structure of comb copolymers were confirmed by wide-angle X-ray scattering, differential scanning calorimetry, and transmission electron microscopy. With increasing POEM content in the comb copolymer, both CO<sub>2</sub> permeability and CO<sub>2</sub>/N<sub>2</sub> selectivity gradually increased. A mechanically strong free-standing membrane was obtained at a POEM:PAcAm ratio of 70:30 wt%, in which the CO<sub>2</sub> permeability and CO<sub>2</sub>/N<sub>2</sub> selectivity reached 261.7 Barrer (1 Barrer = 10<sup>−10</sup> cm<sup>3</sup> (STP) cm cm<sup>−2</sup> s<sup>−1</sup> cmHg<sup>−1</sup>) and 44, respectively. These values are greater than those of commercially available Pebax and among the highest separation performances reported previously for alcohol-soluble, all-polymeric membranes without porous additives. The high performances were attributed to an effective CO<sub>2</sub>-philic pathway for the ethylene oxide group in the rubbery POEM segments and prevention of the N<sub>2</sub> permeability by glassy PAcAm chains. |
| first_indexed | 2024-03-09T05:52:46Z |
| format | Article |
| id | doaj.art-f39f344de60f4db081574fff7507a219 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T05:52:46Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-f39f344de60f4db081574fff7507a2192023-12-03T12:16:05ZengMDPI AGPolymers2073-43602021-01-0113217710.3390/polym13020177Synthesis, Characterization, and CO<sub>2</sub>/N<sub>2</sub> Separation Performance of POEM-<i>g</i>-PAcAm Comb Copolymer MembranesByeong Ju Park0Na Un Kim1Chang Soo Lee2Jong Hak Kim3Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, KoreaDepartment of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, KoreaDepartment of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, KoreaDepartment of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, KoreaAlcohol-soluble comb copolymers were synthesized from rubbery poly(oxyethylene methacrylate) (POEM) and glassy polyacrylamide (PAcAm) via economical and facile free-radical polymerization. The synthesis of comb copolymers was confirmed by Fourier-transform infrared and proton nuclear magnetic resonance spectroscopic studies. The bicontinuous microphase-separated morphology and amorphous structure of comb copolymers were confirmed by wide-angle X-ray scattering, differential scanning calorimetry, and transmission electron microscopy. With increasing POEM content in the comb copolymer, both CO<sub>2</sub> permeability and CO<sub>2</sub>/N<sub>2</sub> selectivity gradually increased. A mechanically strong free-standing membrane was obtained at a POEM:PAcAm ratio of 70:30 wt%, in which the CO<sub>2</sub> permeability and CO<sub>2</sub>/N<sub>2</sub> selectivity reached 261.7 Barrer (1 Barrer = 10<sup>−10</sup> cm<sup>3</sup> (STP) cm cm<sup>−2</sup> s<sup>−1</sup> cmHg<sup>−1</sup>) and 44, respectively. These values are greater than those of commercially available Pebax and among the highest separation performances reported previously for alcohol-soluble, all-polymeric membranes without porous additives. The high performances were attributed to an effective CO<sub>2</sub>-philic pathway for the ethylene oxide group in the rubbery POEM segments and prevention of the N<sub>2</sub> permeability by glassy PAcAm chains.https://www.mdpi.com/2073-4360/13/2/177comb copolymermicrophase-separationpolymer membraneCO<sub>2</sub> separation |
| spellingShingle | Byeong Ju Park Na Un Kim Chang Soo Lee Jong Hak Kim Synthesis, Characterization, and CO<sub>2</sub>/N<sub>2</sub> Separation Performance of POEM-<i>g</i>-PAcAm Comb Copolymer Membranes Polymers comb copolymer microphase-separation polymer membrane CO<sub>2</sub> separation |
| title | Synthesis, Characterization, and CO<sub>2</sub>/N<sub>2</sub> Separation Performance of POEM-<i>g</i>-PAcAm Comb Copolymer Membranes |
| title_full | Synthesis, Characterization, and CO<sub>2</sub>/N<sub>2</sub> Separation Performance of POEM-<i>g</i>-PAcAm Comb Copolymer Membranes |
| title_fullStr | Synthesis, Characterization, and CO<sub>2</sub>/N<sub>2</sub> Separation Performance of POEM-<i>g</i>-PAcAm Comb Copolymer Membranes |
| title_full_unstemmed | Synthesis, Characterization, and CO<sub>2</sub>/N<sub>2</sub> Separation Performance of POEM-<i>g</i>-PAcAm Comb Copolymer Membranes |
| title_short | Synthesis, Characterization, and CO<sub>2</sub>/N<sub>2</sub> Separation Performance of POEM-<i>g</i>-PAcAm Comb Copolymer Membranes |
| title_sort | synthesis characterization and co sub 2 sub n sub 2 sub separation performance of poem i g i pacam comb copolymer membranes |
| topic | comb copolymer microphase-separation polymer membrane CO<sub>2</sub> separation |
| url | https://www.mdpi.com/2073-4360/13/2/177 |
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