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- W1974915511 abstract "Three amphiphilic poly(oxyethylene)-poly(oxypropylene)-poly(oxyethylene) ethers triblock copolymers, denoted Pluronic L61 (PEO3PPO30PEO3), Pluronic L64 (PEO13PPO30PEO13), and Pluronic F68 (PEO79PPO30PEO79) were shown to aggregate and form micelles in ionic liquids (ILs) 1-butyl-3-methylimidazolium tetrafluoroborate (bmimBF4) and 1-butyl-3-methylimidazolium hexafluorophosphate (bmimPF6). The surface tension measurements revealed that the dissolution of the copolymers in ILs depressed the surface tension in a manner analogous to aqueous solutions. The cmcs of three triblock copolymers increase following the order of L61, L64, F68, suggesting that micellar formation was driven by solvatophobic effect. cmc and γcmc decrease with increasing temperature because hydrogen bonds between ILs and hydrophilic group of copolymers decrease and accordingly enhance the solvatophobic interaction. Micellar droplets of irregular shape with average size of 50nm were observed. The thermodynamic parameters ΔGm0, ΔHm0, ΔSm0of the micellization of block copolymers in bmimBF4 and bmimPF6 were also calculated. It was revealed that the micellization is a process of entropy driving, which was further confirmed by isothermal titration calorimetry (ITC) measurements." @default.
- W1974915511 created "2016-06-24" @default.
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- W1974915511 date "2008-07-26" @default.
- W1974915511 modified "2023-10-16" @default.
- W1974915511 title "Aggregation Behavior of Pluronic Triblock Copolymer in 1-Butyl-3-methylimidazolium Type Ionic Liquids" @default.
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- W1974915511 doi "https://doi.org/10.1021/jp8035132" @default.
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