A facile route to realize the copolymerization of l-lactic acid and ε-caprolactone: sulfonic acid-functionalized Brønsted acidic ionic liquids as both solvents and catalysts

Abstract

Biodegradable copolymers of l-lactic acid and ε-caprolactone were prepared in SFBAILs: the effect of ILs and the mechanism.

The synthesis of poly(phenylene sulfide sulfone) in ionic liquids at atmospheric pressure

“…[18][19][20] Brønsted acidic ionic liquids (BAILs) as both solvents and catalysts and Tf 2 N-anionic ionic liquids as solvents were applied for polycondensation of L-lactic acid and 3-caprolactone. 21 Herein we report a novel synthetic approach for PPSS with IL/ ZI as reaction media by aromatic nucleophilic substitution polymerization. To the best of our knowledge, it is the rst time that PPSS was prepared in ILs.…”

Effect of water and methanol on the dissolution and gelatinization of corn starch in [MMIM][(MeO)HPO2]

“…Ionic liquid has been used to replace a wide range of common organic solvent due to its high thermal stability, negligible vapor pressure and wide electrochemical window. [19][20][21][22][23] What's more, ionic liquid has also been utilized as media for starch dissolution, 24 since the anions and cations of the solvent can form hydrogen-bonding with hydroxyl groups of starch and effectively break the hydrogen-bonding network of starch, whose mechanism is the same as that of cellulose. Methanol is expected to stimulate a fast permeation to the non-crystalline area of starch and has better solubility for some organic compounds such as lipids in starch granule than water.…”

Ionic Liquids as Solvents and/or Catalysts in Polymerization

“…Sulfonic acid-functionalized BAILs are effective in copolymerization of L-lactic acid and e-caprolactones [139]. These BAILs could be easily separable by phase separation and recyclable for a minimum of four times without any decrease in catalytic efficiency.…”