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Effects of Ionic Liquids on the Cylindrical Self-Assemblies Formed by Poly(ethylene oxide)-Poly(propylene oxide)-Poly(ethylene oxide) Block Copolymers in Water

Tsoutsoura, Aikaterini ; He, Zhiqi ; Alexandridis, Paschalis

Polymers, 2024-01, Vol.16 (3), p.349 [Periódico revisado por pares]

Switzerland: MDPI AG

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Título:
Effects of Ionic Liquids on the Cylindrical Self-Assemblies Formed by Poly(ethylene oxide)-Poly(propylene oxide)-Poly(ethylene oxide) Block Copolymers in Water
Autor: Tsoutsoura, Aikaterini ; He, Zhiqi ; Alexandridis, Paschalis
Assuntos: Block copolymers ; Copolymers ; Ethylene oxide ; Hydrogen bonds ; Investigations ; Ionic liquids ; Liquid crystals ; micelle ; Mixing ratio ; Nitrates ; Pluronic ; Poloxamer ; polyethylene glycol ; Polyethylene oxide ; polymer electrolyte ; Polymers ; Propylene oxide ; Self-assembly ; Sensors ; Solvent effect ; Solvents ; surfactant ; Surfactants ; X-ray scattering
É parte de: Polymers, 2024-01, Vol.16 (3), p.349
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Aiming at the fundamental understanding of solvent effects in amphiphilic polymer systems, we considered poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) block copolymers in water mixed with an ionic liquid-ethylammonium nitrate (EAN), 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF ), or 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF )-and we investigated the hexagonal lyotropic liquid crystal structures by means of small-angle X-ray scattering (SAXS). At 50% polymer, the hexagonal structure (cylinders of self-assembled block copolymer) was maintained across the solvent mixing ratio. The effects of the ionic liquids were reflected in the characteristic length scales of the hexagonal structure and were interpreted in terms of the location of the ionic liquid in the self-assembled block copolymer domains. The protic ionic liquid EAN was evenly distributed within the aqueous domains and showed no affinity for the interface, whereas BMIMPF preferred to swell PEO and was located at the interface so as to reduce contact with water. BMIMBF was also interfacially active, but to a lesser extent.
Editor: Switzerland: MDPI AG
Idioma: Inglês

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Effects of Ionic Liquids on the Cylindrical Self-Assemblies Formed by Poly(ethylene oxide)-Poly(propylene oxide)-Poly(ethylene oxide) Block Copolymers in Water

Tsoutsoura, Aikaterini ; He, Zhiqi ; Alexandridis, Paschalis

Switzerland: MDPI AG

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