Hybrid coatings, based on poly(ethylene oxide) (PEO) or polycaprolactone (PCL) and silica (SiO2), at different org.-inorg. compns. have been used to coat PET films employed in the elec. industry to produce capacitors. The overall elec. behavior of the coated films has been investigated. The elec. strength of the coated films increases up to 10-15% of the uncoated ones regardless of polymer type (PEO/PCL) and amt. of inorg. phase, as far as the thickness of the coating is below 5 mm. A systematic increase of surface elec. cond. is found in all coated samples which however still behave as insulators. Permittivity and loss factor also increase particularly at low frequencies (<10 Hz) on account of the presence of ions deriving from the sol-gel process and on the presence of interfacial polarization probably related to the coatings nanostructurated morphol. which leads to phase sepn.
Saccani A., Toselli M., Messori M., Fabbri P., Pilati F. (2006). Electrical behavior of PET films coated with nanostructured organic-inorganic hybrids. JOURNAL OF APPLIED POLYMER SCIENCE, 102, 4870-4877 [10.1002/app.24847].
Electrical behavior of PET films coated with nanostructured organic-inorganic hybrids.
SACCANI, ANDREA;TOSELLI, MAURIZIO;FABBRI, PAOLA;
2006
Abstract
Hybrid coatings, based on poly(ethylene oxide) (PEO) or polycaprolactone (PCL) and silica (SiO2), at different org.-inorg. compns. have been used to coat PET films employed in the elec. industry to produce capacitors. The overall elec. behavior of the coated films has been investigated. The elec. strength of the coated films increases up to 10-15% of the uncoated ones regardless of polymer type (PEO/PCL) and amt. of inorg. phase, as far as the thickness of the coating is below 5 mm. A systematic increase of surface elec. cond. is found in all coated samples which however still behave as insulators. Permittivity and loss factor also increase particularly at low frequencies (<10 Hz) on account of the presence of ions deriving from the sol-gel process and on the presence of interfacial polarization probably related to the coatings nanostructurated morphol. which leads to phase sepn.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
