Ionic liquids (ILs), organic salts that are fluid at ambient conditions, are a novel class of compounds with a combinatorially great chemical diversity and unique properties. The very low volatility and high thermal and chemical stability that many ILs exhibit render them promising as solvents in diverse applications. We are interested in the self-assembly properties in ionic liquids of block polymers, in particular those of the poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) family, commercially available as Poloxamers or Pluronics. We consider here aqueous solutions of a relatively hydrophobic PEO-PPO-PEO block copolymer (Pluronic P123) with the representative ionic liquids ethylammonium nitrate (EAN) (protic IL) or 1-butyl-3-methylimidazolium tetrafluoroborate (BmimBF4) (aprotic IL). We report on the amphiphilic block copolymer micellization thermodynamics (obtained from isothermal titration calorimetry, ITC) and micelle structure (obtained from small-angle neutron scattering, SANS), and discuss the observed IL effects in the context of the underlying intermolecular interactions between PEO-PPO-PEO and IL, PEO-PPO-PEO and water, and IL and water.  We further compare the effects of ionic liquid electrolytes to those of classic electrolytes.

Block copolymer micelles modulated by ionic liquids: Thermodynamics and structure

Macromolecular Chemistry: The Second Century

[Author Benefits](https://scimeetings.acs.org/?utm_source=pubs_content_marketing&utm_medium=website&utm_campaign=0320_MCF_NPI_Launch_Spring_Homepage&ref=pubs_content_marketing)

[How to use SciMeetings](https://storage.googleapis.com/dl.morressier.com/acs/SciMeetings-ACSSpring2020-HowToGuide_M3020-Final.pdf)

[Frequently Asked Questions](https://storage.googleapis.com/dl.morressier.com/acs/SciMtng_ACSNMSp2020_FAQ_M3120_Final.pdf)

ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.