Journal of Supercritical Fluids, Vol.95, 222-227, 2014
Hyperbranched poly(ether-siloxane) amphiphiles of surprisingly high solubility in supercritical carbon dioxide
In this work, we present a simple method for preparation of an inexpensive CO2-philic amphiphiles for solubilization and related applications. The poly(ether-siloxane)s we have synthesized showed very good solubility in supercritical carbon dioxide, despite the fact they contained hydrophilic polyether structures. So far, incorporation of any type of substituents to the poly(dimethylsiloxane) (PDMS) chains resulted in decrease of the solubility in scCO(2). We showed that, it is possible to obtain copolymers containing both hydrophilic (polyether) and hydrophobic (polysiloxane) parts which have better solubility in scCO(2) than respective homopolymers. The proposed synthetic route should allow the design of a wide range of related CO2-philic hyperbranched materials. (C) 2014 Elsevier B.V. All rights reserved.
Keywords:Synthesis;Phase behaviour;Hyperbranched polyether;Hyperbranched polysiloxane;Carbon dioxide