Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Nanoconfined crosslinked poly(ionic liquid)s with unprecedented selective swelling properties obtained by alkylation in nanophase-separated poly(1-vinylimidazole)-l-poly(tetrahydrofuran) conetworks
Despite the great interest in nanoconfined materials nowadays, nanocompartmentalized poly(ionic liquid)s (PILs) have been rarely investigated so far. Herein, we report on the successful alkylation of poly(1-vinylimidazole) with methyl iodide in bicontinuous nanophasic poly(1-vinylimidazole)-l-poly(tetrahydrofuran) (PVIm-l-PTHF) amphiphilic conetworks (APCNs) to obtain nanoconfined methylated PVImMe-l-PTHF poly(ionic liquid) conetworks (PIL-CNs). A high extent of alkylation (~95%) was achieved via a simple alkylation process with MeI at room temperature. This does not destroy the bicontinuous nanophasic morphology as proved by SAXS and AFM, and PIL-CNs with 15–20 nm d-spacing and poly(3-methyl-1-vinylimidazolium iodide) PIL nanophases with average domain sizes of 8.2–8.4 nm are formed. Unexpectedly, while the swelling capacity of the PIL-CN dramatically increases in aprotic polar solvents, such as DMF, NMP, and DMSO, reaching higher than 1000% superabsorbent swelling degrees, the equilibrium swelling degrees decrease in even highly polar protic (hydrophilic) solvents, like water and methanol. An unprecedented Gaussian-type relationship was found between the ratios of the swelling degrees versus the polarity index, indicating increased swelling for the nanoconfined PVImMe-l-PTHF PIL-CNs in solvents with a polarity index between ~6 and 9.5. In addition to the nanoconfined structural features, the unique selective superabsorbent swelling behavior of the PIL-CNs can also be utilized in various application fields.
Nanoconfined crosslinked poly(ionic liquid)s with unprecedented selective swelling properties obtained by alkylation in nanophase-separated poly(1-vinylimidazole)-l-poly(tetrahydrofuran) conetworks
Despite the great interest in nanoconfined materials nowadays, nanocompartmentalized poly(ionic liquid)s (PILs) have been rarely investigated so far. Herein, we report on the successful alkylation of poly(1-vinylimidazole) with methyl iodide in bicontinuous nanophasic poly(1-vinylimidazole)-l-poly(tetrahydrofuran) (PVIm-l-PTHF) amphiphilic conetworks (APCNs) to obtain nanoconfined methylated PVImMe-l-PTHF poly(ionic liquid) conetworks (PIL-CNs). A high extent of alkylation (~95%) was achieved via a simple alkylation process with MeI at room temperature. This does not destroy the bicontinuous nanophasic morphology as proved by SAXS and AFM, and PIL-CNs with 15–20 nm d-spacing and poly(3-methyl-1-vinylimidazolium iodide) PIL nanophases with average domain sizes of 8.2–8.4 nm are formed. Unexpectedly, while the swelling capacity of the PIL-CN dramatically increases in aprotic polar solvents, such as DMF, NMP, and DMSO, reaching higher than 1000% superabsorbent swelling degrees, the equilibrium swelling degrees decrease in even highly polar protic (hydrophilic) solvents, like water and methanol. An unprecedented Gaussian-type relationship was found between the ratios of the swelling degrees versus the polarity index, indicating increased swelling for the nanoconfined PVImMe-l-PTHF PIL-CNs in solvents with a polarity index between ~6 and 9.5. In addition to the nanoconfined structural features, the unique selective superabsorbent swelling behavior of the PIL-CNs can also be utilized in various application fields.
Nanoconfined crosslinked poly(ionic liquid)s with unprecedented selective swelling properties obtained by alkylation in nanophase-separated poly(1-vinylimidazole)-l-poly(tetrahydrofuran) conetworks
Stumphauser, Tímea (Autor:in) / Kasza, György (Autor:in) / Domján, Attila (Autor:in) / Wacha, András (Autor:in) / Varga, Zoltán (Autor:in) / Thomann, Yi (Autor:in) / Thomann, Ralf (Autor:in) / Pásztói, Balázs (Autor:in) / Trötschler, Tobias M. (Autor:in) / Kerscher, Benjamin (Autor:in)
01.01.2020
Polymers. - 12, 10 (2020) , 2292, ISSN: 2073-4360
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Swelling Properties of Poly(N-Vinylimidazole) Hydrogels
| British Library Online Contents | 2002
Swelling Properties of Chemically Crosslinked Poly(acrylamide-co-maleic acid) Hydrogels
| British Library Online Contents | 2006
Adsorption and dielectric properties of poly(1-vinylimidazole) on sepiolite
| Online Contents | 2012
Swelling Properties of Chemically Crosslinked Poly(acrylamide-co-maleic acid) Hydrogels
| British Library Online Contents | 2006