Effect of Glycerol on the Self-Assembly of P123 in a Room-Temperature Ionic Liquid [Bmim]PF₆

Abstract:

Phase behavior of ternary systems involving PEO-PPO-PEO block copolymer (Pluronic P123), room-temperature ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate [Bmim]PF6, and glycerol is investigated at 25 °C by using small-angle X-ray scattering (SAXS) techniques. In this ternary system, the structures formed in the binary P123/[Bmim]PF6 system, hexagonal phase (H1) and lamellar phase (Lα), are still obtained. At lower P123/[Bmim]PF6 ratio, the H1 phase can accommodate more than 30 % glycerol. At higher P123/[Bmim]PF6 ratio, the Lα phase only accommodates less than 2 % glycerol and Lα changes to H1 with increasing the glycerol content. Moreover, a phase separation takes place at a higher glycerol content. Solvatophobic interactions between hydrophobic groups of [Bmim]PF6 and P123, coulombic force existing in the polyoxyethylene chain and imidazolium cation, H-bond between P123 and glycerol, accompanying with the force ascribe to the nitrogen of the imidazole ring and the oxygen of alcohol are helpful for the formation of long-range ordered structure.

• Periodical: Advanced Materials Research (Volumes 306-307)
• Pages: 1693-1697
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.306-307.1693
• Online since: August 2011
• Authors: Xiao Nan Li, Mei Shan Pei, Lu Yan Wang, Li Wang
• Keywords: Glycerol, Ionic Liquid (IL), Lyotropic Liquid Crystal, P123, SAXS

References

[1] L. Yang and P. Alexandridis: Curr. Opin. Colloid Interface Sci. Vol. 5 (2000), p.132.

[2] P. Holmqvist, P. Alexandridis and B. Lindman: J. Phys. Chem. B. Vol. 102 (1998), p.1149.

[3] J. Noolandi, A. C. Shi and P. Linse: Macromolecules. Vol. 29 (1996), p.5907.

[4] P. Alexandridis, R. Ivanova and B. Lindman: Langmuir. Vol. 16 (2000), p.3676.

[5] C. Chaibundit, M.P.S.R. Na´gila and M.P.S.R. Na´dja: Langmuir. Vol. 24 (2008), p.12260.

[6] R. Ivanova, P. Alexandridis and B. Lindman: Colloids Surf. A. Vol. 183-185 (2001), p.41.

[7] L.Y. Wang, X. Chen and Y.C. Chai: Chem. Commun. (2004), p.2840.

[8] G.D. Zhang, X. Chen and Y.R. Zhao: J. Phys. Chem. B. Vol. 112 (2008), p.6578.

[9] P. Alexandridis and T.A. Hatton: Colloids Surf. A. Vol. 96 (1995), p.1.

[10] J.L. Anderson, V. Pino and E.C. Hagberg: Chem. Comm. (2003), p.2444.

[11] J. Tang, D. Li and C.Y. Sun: Colloids Surf. A. Vol. 273 (2006), p.24.

[12] J.M. Crosthwaite, M.J. Muddon and S.N.V.K. Aki: J. Phys. Chem. B. Vol. 110 (2006), p.9354.

[13] L.Y. Wang: Doctor Dissertation, Chem. Dept. Shandong Univ (2006).

[14] A. Yokozeki, D.J. Kasprzak and M.B. Shiflett: Phys. Chem. Vol. 9 (2007), p.5018.

[15] G.C. Pimentel, A.L. McClellan, in: The Hydrogen Bond, edited by W.H. Freeman, San Francisco(1960).