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Rheological Scaling of Ionic-Liquid-Based Polyelectrolytes in Ionic Liquid Solutions
https://oist.repo.nii.ac.jp/records/1072
https://oist.repo.nii.ac.jp/records/1072ab67a7f6-6242-428f-8c38-4a5e91752c69
名前 / ファイル | ライセンス | アクション |
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acs.macromol.8b02544 (2.8 MB)
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ACS AuthorChoice
(https://pubs.acs.org/page/policy/authorchoice_termsofuse.html) |
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2019-08-28 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Rheological Scaling of Ionic-Liquid-Based Polyelectrolytes in Ionic Liquid Solutions | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者(英) |
Matsumoto, Atsushi
× Matsumoto, Atsushi× Del Giudice, Francesco× Rotrattanadumrong, Rachapun× Shen, Amy Q. |
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書誌情報 |
en : Macromolecules 巻 52, 号 7, p. 2759-2771, 発行日 2019-03-28 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Polymerized ionic liquids (PILs) are a special class of polyelectrolytes with ionic liquid (IL) species being covalently attached to the repeating unit. The rheological properties of PIL in IL solutions are strongly influenced by the electrostatic screening between IL and PIL chains. However, the effect of IL electrostatic screening on the rheology of PIL in IL solutions remains elusive. To address this challenging yet important question, we conduct detailed rheological characterization of a model system containing a PIL [PC4-TFSI: poly(1-butyl-3-vinylimidazolium bis(trifluoromethanesulfonyl)imide)] in a mixture of a salt-free solvent (DMF: dimethylformamide) and an IL [Bmim-TFSI: 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide] solution, with low to high IL concentrations, while spanning dilute and semidilute polymer regimes. We compare the specific viscosity ηsp and the longest relaxation time λ of PILs measured at various Bmim-TFSI concentrations from 0 M (pure DMF) to 3.42 M (pure Bmim-TFSI) with the scaling predictions for ordinary polyelectrolyte solutions. We find good agreement at low IL concentrations but significant deviations at higher IL concentrations. We capture this discrepancy by proposing and validating a modified scaling law accounting for the modified screening length in concentrated solutions of ordinary salts. We propose that extended PIL chains initially shrink due to the charge screening effect at low IL concentrations but revert to expanded configuration at higher IL concentrations due to the charge underscreening effect when the screening length increases with increasing IL concentrations. Our results shed new insights on the conformation of PIL in IL solutions and, for the first time, provide a valid reference for the study of general polyelectrolyte solutions at high salt concentrations, where the Debye–Hückel theory is no longer valid. | |||||
出版者 | ||||||
出版者 | American Chemical Society | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0024-9297 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1520-5835 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1021/acs.macromol.8b02544 | |||||
権利 | ||||||
権利情報 | © 2019 American Chemical Society | |||||
情報源 | ||||||
関連名称 | https://pubs.acs.org/page/policy/authorchoice_termsofuse.html | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://pubs.acs.org/doi/10.1021/acs.macromol.8b02544 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |