Supercritical Fluids

Projects on stand-by at the moment...

The overall objective of our previous work was to provide crucial insights into knowledgeably designing environmentally friendly CO₂ -philic polymers and surfactants relevant to applications, ranging from polymerization to microlithography.

A new light scattering cell adapted to compressible fluids was designed and fabricated. By measuring the variation of the CO₂ solvent quality (second virial coefficient, A₂ ) for various homopolymers and comparing it with the available theoretical models, we demonstrated that polymer-solvent universal behaviour remained valid in liquid CO₂ .

Through several collaboration and to expand the utility of the CO₂ platform, amphiphilic molecules (diblock-copolymers and dendritic molecules) were synthesised and solubility as well as micellization process in compressed CO₂ were investigated demonstrating promising potential not only for CO₂ technology but also for phase transfer and purification.

Pressure vs Temperature Phase Diagram of Carbon Dioxide

- Solution Properties of a Fluorinated Alkyl Methacrylate Polymer in Carbon Dioxide
J. Guo, P. André, M. Adam, S. Panyukov, M. Rubinstein, J.M. DeSimone ; Macromolecules 39, 9, 3427 (2006)

- Solubility Study of Fluorinated Polymer and Block-Copolymer in Compressed CO₂
P. André, P. Lacroix-Desmazes, D.K. Taylor, B. Boutevin ; Journal of Supercritical Fluids 37, 2, 263 (2006)

- Transition metal-catalyzed one-pot synthesis of amphiphilic dendritic molecular nanocarriers.
C. Chen, P. André, J.M. DeSimone, Z. Guan ; 229^th ; ACS National Meeting, San Diego (CA), March 13-17, 2005

- “Abnormal” Micellization in Compressed CO₂ : Solubility of Fluorinated Homopolymer and Block Copolymer
P. André, P. Lacroix-Desmazes, D.K. Taylor, B. Boutevin ; International Society for Advancement of Supercritical Fluids 10^th European Meeting, Strasbourg (France), 12-14 Décembre, 2005

- Light Scattering Study of Polydimethyl Siloxane in Liquid and Supercritical Carbon Dioxide
P. André, S. L. Folk, M. Adam, M. Rubinstein, J.M. DeSimone ; Journal of Physical Chemistry A 108, 45, 9901 (2004)

- Macromolecular Surfactants for Supercritical Carbon Dioxide Applications: Synthesis and Characterization of Fluorinated Block Copolymers Prepared by Nitroxide-Mediated Radical Polymerization
P. Lacroix-Desmazes, P. André, J.M. DeSimone, A.V. Ruzette, B. Boutevin ; Journal of Polymer Science Part A: Polymer Chemistry 42, 14, 3537 (2004)

- Study of Non-Fluorinated Homopolymers in Compressed Carbon Dioxide
P. André, S.L. Folk, J.M. DeSimone ; 225^th ; ACS Meeting (New-Orleans, LA-USA), March 23-27, 2003

- Synthesis and Light Scattering of Fluorinated and Siloxane-based Polymers in Compressed Carbon Dioxide
J.M. DeSimone, S.L. Folk, P. André, M. Adam ; International Society for Advancement of Supercritical Fluids 6^th ; European Meeting, Versailles (France), Apr. 28-30, 2003
- Light Scattering Study of PFOMA Chains in Liquid and Supercritical CO₂
P. André, S.L. Folk, M. Adam, M. Rubinstein, J.M. DeSimone ; National Conference on Environmental Science and Technology, Greensboro (NC-USA), Sept. 8-10, 2002

- Self-Assembly of Small Molecules and Macromolecules in Compressible Liquid and Supercritical CO₂
J.M. DeSimone, S.L. Folk, J.D. Polley, M. Adam, M. Rubinstein, P. André, J. Keiper ; 224^th ; ACS National Meeting, Boston (MA-USA) Aug. 18-22, 2002