Protonation-Induced Microphase Separation in Thin Films of a Polyelectrolyte-Hydrophilic Diblock Copolymer
Block copolymers composed of poly(oligo ethylene glycol methyl ether methacrylate) and poly(2-vinylpyridine) are disordered in the neat state but can be induced to order by protonation of the P2VP block, demonstrating a tunable and responsive method for triggering assembly in thin films. Comparison...
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| Format: | Article |
| Language: | en_US |
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American Chemical Society (ACS)
2015
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| Online Access: | http://hdl.handle.net/1721.1/97491 https://orcid.org/0000-0002-7272-7140 https://orcid.org/0000-0001-9755-316X |
| _version_ | 1826203170221588480 |
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| author | Olsen, Bradley D. Stewart-Sloan, Charlotte Robe |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Olsen, Bradley D. Stewart-Sloan, Charlotte Robe |
| author_sort | Olsen, Bradley D. |
| collection | MIT |
| description | Block copolymers composed of poly(oligo ethylene glycol methyl ether methacrylate) and poly(2-vinylpyridine) are disordered in the neat state but can be induced to order by protonation of the P2VP block, demonstrating a tunable and responsive method for triggering assembly in thin films. Comparison of protonation with the addition of salts shows that microphase separation is due to selective protonation of the P2VP block. Increasing acid incorporation and increasing 2-vinylpyridine content for P2VP minority copolymers both promote increasingly phase-separated morphologies, consistent with protonation increasing the effective strength of segregation between the two blocks. The self-assembled nanostructures formed after casting from acidic solutions may be tuned based on the amount and type of acid incorporation as well as the annealing treatment applied after casting, where both aqueous and polar organic solvents are shown to be effective. Therefore, POEGMA-b-P2VP is a novel ion-containing block copolymer whose morphologies can be facilely tuned during casting and processing by controlling its exposure to acid. |
| first_indexed | 2024-09-23T12:32:26Z |
| format | Article |
| id | mit-1721.1/97491 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:32:26Z |
| publishDate | 2015 |
| publisher | American Chemical Society (ACS) |
| record_format | dspace |
| spelling | mit-1721.1/974912022-10-01T09:39:28Z Protonation-Induced Microphase Separation in Thin Films of a Polyelectrolyte-Hydrophilic Diblock Copolymer Olsen, Bradley D. Stewart-Sloan, Charlotte Robe Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Department of Mechanical Engineering Stewart-Sloan, Charlotte Robe Olsen, Bradley D. Block copolymers composed of poly(oligo ethylene glycol methyl ether methacrylate) and poly(2-vinylpyridine) are disordered in the neat state but can be induced to order by protonation of the P2VP block, demonstrating a tunable and responsive method for triggering assembly in thin films. Comparison of protonation with the addition of salts shows that microphase separation is due to selective protonation of the P2VP block. Increasing acid incorporation and increasing 2-vinylpyridine content for P2VP minority copolymers both promote increasingly phase-separated morphologies, consistent with protonation increasing the effective strength of segregation between the two blocks. The self-assembled nanostructures formed after casting from acidic solutions may be tuned based on the amount and type of acid incorporation as well as the annealing treatment applied after casting, where both aqueous and polar organic solvents are shown to be effective. Therefore, POEGMA-b-P2VP is a novel ion-containing block copolymer whose morphologies can be facilely tuned during casting and processing by controlling its exposure to acid. United States. Dept. of Energy. Office of Basic Energy Sciences (Award DE-SC0001088) National Science Foundation (U.S.) (Award CMMI-1246740) 2015-06-22T14:02:01Z 2015-06-22T14:02:01Z 2014-04 2013-12 Article http://purl.org/eprint/type/JournalArticle 2161-1653 2161-1653 http://hdl.handle.net/1721.1/97491 Stewart-Sloan, Charlotte R., and Bradley D. Olsen. “Protonation-Induced Microphase Separation in Thin Films of a Polyelectrolyte-Hydrophilic Diblock Copolymer.” ACS Macro Lett. 3, no. 5 (May 20, 2014): 410–414. © 2014 American Chemical Society https://orcid.org/0000-0002-7272-7140 https://orcid.org/0000-0001-9755-316X en_US http://dx.doi.org/10.1021/mz400650q ACS Macro Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Chemical Society (ACS) American Chemical Society |
| spellingShingle | Olsen, Bradley D. Stewart-Sloan, Charlotte Robe Protonation-Induced Microphase Separation in Thin Films of a Polyelectrolyte-Hydrophilic Diblock Copolymer |
| title | Protonation-Induced Microphase Separation in Thin Films of a Polyelectrolyte-Hydrophilic Diblock Copolymer |
| title_full | Protonation-Induced Microphase Separation in Thin Films of a Polyelectrolyte-Hydrophilic Diblock Copolymer |
| title_fullStr | Protonation-Induced Microphase Separation in Thin Films of a Polyelectrolyte-Hydrophilic Diblock Copolymer |
| title_full_unstemmed | Protonation-Induced Microphase Separation in Thin Films of a Polyelectrolyte-Hydrophilic Diblock Copolymer |
| title_short | Protonation-Induced Microphase Separation in Thin Films of a Polyelectrolyte-Hydrophilic Diblock Copolymer |
| title_sort | protonation induced microphase separation in thin films of a polyelectrolyte hydrophilic diblock copolymer |
| url | http://hdl.handle.net/1721.1/97491 https://orcid.org/0000-0002-7272-7140 https://orcid.org/0000-0001-9755-316X |
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