Physicochemical Understanding of Self-Aggregation and Microstructure of a Surface-Active Ionic Liquid [C4mim] [C8OSO3] Mixed with a Reverse Pluronic 10R5 (PO8EO22PO8)
| Autor: | R. Ravikanth Reddy, Satya P. Moulik, Masahiko Abe, Asit Baran Mandal, Animesh Pan, Gorthy K S Prameela, Bandaru V. N. Phani Kumar, Koji Tsuchiya, Vinod K. Aswal |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Aqueous solution
Materials science General Chemical Engineering Isothermal titration calorimetry 02 engineering and technology General Chemistry Neutron scattering 010402 general chemistry 021001 nanoscience & nanotechnology C4mim Microstructure 01 natural sciences Micelle Article 0104 chemical sciences lcsh:Chemistry chemistry.chemical_compound chemistry Chemical engineering lcsh:QD1-999 Transmission electron microscopy Ionic liquid 0210 nano-technology |
| Zdroj: | ACS Omega ACS Omega, Vol 3, Iss 5, Pp 5155-5164 (2018) |
| ISSN: | 2470-1343 |
| Popis: | Physicochemical studies on aqueous mixtures of ionic liquids (ILs) and reverse pluronics are limited. Self-aggregation dynamics and microstructure of a surface-active IL (SAIL), 1-butyl-3-methylimidazolium octylsulfate [C4mim] [C8OSO3], in the presence of a reverse pluronic, PO8EO22PO8 (known as 10R5), were studied using isothermal titration calorimetry (ITC), high-resolution nuclear magnetic resonance (NMR), and small-angle neutron scattering (SANS) methods. Also, cryo-/freeze-fracture transmission electron microscopy was employed to determine the microstructures of SAIL/10R5 mixtures. The ITC and NMR results revealed facilitation of SAIL aggregation in the presence of 10R5 forming mixed aggregates as well as free SAIL micelles. 2H spin relaxation rate data pointed out the onset of slow dynamics of the aqueous SAIL/10R5 mixture with an increase in either the former or the latter. Globular morphologies of the mixed species as well as their individual components were corroborated from the measurements. The preferential location of interaction of the SAIL with the 10R5 was identified from 13C NMR chemical shift findings to be in the interfacial region of the assembled SAIL. The formed species were mixed interacted aggregates but not mixed micelles that arise from mixed surfactants. The physicochemical information acquired herein would enrich the literature on the 10R5/SAIL mixed microheterogeneous systems having importance in the making of useful green drug carrier systems and templates for the synthesis of nanomaterials. |
| Databáze: | OpenAIRE |
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