A com. perfluoropolyether contg. alkoxysilane functionalities was employed to prep. org.-inorg. hybrid coatings by using the sol-gel process in the presence of tetraethoxysilane. Contact angle anal. revealed a strong hydrophobic and oleophobic character of the coatings almost independently from the mol. wt. of the starting fluorinated oligomer. Surface tension values were in the range of 14-16 mN/m, suggesting a preferential segregation of fluorinated segments onto the surface of the coating. At. force microscopy showed the presence very smooth surfaces permitting to neglect the contribution of the surface roughness to wettability. Friction coeff. values were markedly lower with respect to the value of uncoated glass substrate.
Surface properties of fluorinated hybrid coatings / Fabbri P.; Messori M.; Montecchi M.; Pilati F.; Taurino R.; Tonelli C.; Toselli M.. - In: JOURNAL OF APPLIED POLYMER SCIENCE. - ISSN 0021-8995. - STAMPA. - 102:(2006), pp. 1483-1488. [10.1002/app.24350]
Surface properties of fluorinated hybrid coatings.
FABBRI, PAOLA;TOSELLI, MAURIZIO
2006
Abstract
A com. perfluoropolyether contg. alkoxysilane functionalities was employed to prep. org.-inorg. hybrid coatings by using the sol-gel process in the presence of tetraethoxysilane. Contact angle anal. revealed a strong hydrophobic and oleophobic character of the coatings almost independently from the mol. wt. of the starting fluorinated oligomer. Surface tension values were in the range of 14-16 mN/m, suggesting a preferential segregation of fluorinated segments onto the surface of the coating. At. force microscopy showed the presence very smooth surfaces permitting to neglect the contribution of the surface roughness to wettability. Friction coeff. values were markedly lower with respect to the value of uncoated glass substrate.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
