3rd meeting of young researchers at UP 1 - IJUP - Universidade do ...

Phase Transition Thermodynamics of Perfluorocarbon alcohols
by DSC
José C. S. Costa , Luís M. N. B. F. Santos
Centro de Investigação em Química, Department of Chemistry and Biochemistry
Faculty of Science, University of Porto, R. Campo Alegre, 687 4169-007 Porto
Perfluorocarbon alcohols (PFAs) are a type of Perfluorinated Organic Compounds (PFCs) used
in numerous commercial products like fire and textile protection agents, floor polishers,
detergents, paints, paper treatment agents and electronic equipment. [1] The energetic and
structural study of these compounds with potential application as numerous commercial
products is an important research target in our laboratory. [2] In this work, a contribution to the
phase transitions study of C7, C8, C9 and C10 perfluorocarbon alcohols will be presented. The
structure of one of the compounds studied is presented in figure 1.
Figure 1 – Schematic representation of the 1H, 1H-Perfluoroctane-1-ol, C7F16CH2OH
For each of these compounds, the temperature, molar enthalpies and entropies of fusion were
measured in a power compensated differential scanning calorimetry (DSC) (SETARAM model
141). The thermodynamic results obtained in this work will be used to evaluate the solid-liquid
equilibrium in terms of the contribution of the increasing perfluoralkyl chain length.
References:
[1] Mary Joyce A. Dinglasan-Panlilio and Scott A. Mabury, Significant Residual Fluorinated
Alcohols Present in Various Fluorinated Materials, Environ. Sci. Technol (40): 1447-1453,
2006.
[2] Mara G. Freire, Pedro J. Carvalho, Luís M.N.B.F. Santos, Lígia R. Gomes, Isabel M. Marrucho,
João A.P. Coutinho, Solubility of water in fluorocarbons: Experimental and Cosmos-RS prediction
results, J. Chem. Thermodynamics (42): 213-219, 2010.
342 3 rd meeting of young researchers at UP