TY - JOUR
T1 - Peroxidic perfluoropolyether for the covalent binding of perfluoropolyether chains on carbon black surface
AU - Sansotera, Maurizio
AU - Navarrini, Walter
AU - Gola, Massimo
AU - Wormald, Philip
AU - Bianchi, Claudia
AU - Famulan, Antonio
AU - Avataneo, Marco
PY - 2011/12
Y1 - 2011/12
N2 - Peroxidic perfluoropolyethers (PFPEs) are suitable tools for the covalent linkage of fluorinated groups on substrates containing aromatic moieties. Thus the thermal decomposition process of such fluorinated peroxides allowed the covalent linkage of PFPE radicals to the polycyclic aromatic structure of a graphitic carbon black. Contact angle measurements on molded pellets made with modified carbon black powders revealed a gradual enhancement of the hydrophobicity, which follows the increase of the fluorine content on the surface according to XPS experiments. BET analyses also revealed variations of the surface area of carbonaceous samples. Products and by-products were also evaluated by mass balances of decomposed portions of PFPE residues, respectively, PFPE chains bonded on carbon black and PFPE fluids obtained by homocoupling side-reactions. Modified carbonaceous materials were analyzed by solid state 19F-MAS NMR and the results are in agreement with the proposed radical mechanism.
AB - Peroxidic perfluoropolyethers (PFPEs) are suitable tools for the covalent linkage of fluorinated groups on substrates containing aromatic moieties. Thus the thermal decomposition process of such fluorinated peroxides allowed the covalent linkage of PFPE radicals to the polycyclic aromatic structure of a graphitic carbon black. Contact angle measurements on molded pellets made with modified carbon black powders revealed a gradual enhancement of the hydrophobicity, which follows the increase of the fluorine content on the surface according to XPS experiments. BET analyses also revealed variations of the surface area of carbonaceous samples. Products and by-products were also evaluated by mass balances of decomposed portions of PFPE residues, respectively, PFPE chains bonded on carbon black and PFPE fluids obtained by homocoupling side-reactions. Modified carbonaceous materials were analyzed by solid state 19F-MAS NMR and the results are in agreement with the proposed radical mechanism.
U2 - 10.1016/j.jfluchem.2011.07.018
DO - 10.1016/j.jfluchem.2011.07.018
M3 - Article
SN - 0022-1139
VL - 132
SP - 1254
EP - 1261
JO - Journal of Fluorine Chemistry
JF - Journal of Fluorine Chemistry
IS - 12
ER -