Rapid expansion RESS-process

Chernyak Y, Henon F, Harris RB, Gould RD, Franklin RK, Edwards JR, DeSimone JM, Carbonell RG. Formation of perfluoropolyether coatings by the rapid expansion of supercritical solutions (RESS) process. 1. Experimental results. Ind Eng Chem Res 2001 40 6118-6126. 

Guney-Altay, 0., Levit, N., Pestov, D., Tepper, G. (2006). Precipitation of nanocomposite particles from a multi-component, rapidly expanding supercritical solution,/. Supercrit Fluids, 27,229-241. Chernyak, Y, Henon, F., Harris, R. B., Gould, R. D., Franklin, R K., Edwards J. R, De Simone, J. M., Carbonell, R G. (2001). Formation of perfluoropolyether coatings by the rapid expansion of supercritical solutions (RESS) process. Part 1. Experimental results, Ind. Eng. Chem. Res., 40,6118-6126. 

Sane, A., Thies, M. C. (2007). Effect ofmaterial properties and processing conditions on RESS of poly(l-lactide),/. Supercrit Fluids, 40,134-143. Meziani, M. J., Pathak, R, Wang, W., Desal, T, Patil, A, Sun, Y.-P. (2005). Polymeric nanofibers from rapid expansion of supercritical solution, Ind. Eng. Chem. Res., 44,4594-4598. 

Considering the reverse process, the structure and location of the collapsed phase and the reversibility of the collapse process determines whether the collapsed phase will reincorporate itself upon re-expansion of the mono-layer. Monolayers that are more resistant to collapse (and can achieve high surface pressures) usually do not respread well collapse is an irreversible process in these systems and the collapsed phase remains in a bulk 3D state at the interface or is lost into the subphase. For proper functioning, ideal LS monolayers should resist collapse (and thus achieve low surface tensions) yet respread rapidly and completely (which seems to be a dichotomy in behavior and is incompatible with single-component monolayers). 

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