An easy method of incorporating TiO nanoparticles into Nafion perfluorinated ionomer is proposed. Ultrathin films of Nafion were prepared by employing the Langmuir-Schaefer (LS) technique. The pressure-area isotherm study of a Langmuir monolayer of Nafion at the air-water interface on different concentrations of NaCl as the subphase allowed us to find the best experimental conditions for the deposition of stable Langmuir-Schaefer films. Incorporation of TiO nanoparticles was performed by dipping Nafion LS films in a solution of TiO nanoparticles. The uniformity of the TiO incorporation was detected by UV-visible spectroscopy. The morphology of the Nafion, Nafion/TiO nanoparticles thin films, and the changes due to the annealing procedure were investigated by atomic force microscopy. Interestingly, the AFM investigation showed that Nafion and Nafion/TiO LS films have thermal stability up to 600°C.
Langmuir-Schaefer films of nafion with incorporated TiO2 nanoparticles
Notargiacomo Andrea;
2005
Abstract
An easy method of incorporating TiO nanoparticles into Nafion perfluorinated ionomer is proposed. Ultrathin films of Nafion were prepared by employing the Langmuir-Schaefer (LS) technique. The pressure-area isotherm study of a Langmuir monolayer of Nafion at the air-water interface on different concentrations of NaCl as the subphase allowed us to find the best experimental conditions for the deposition of stable Langmuir-Schaefer films. Incorporation of TiO nanoparticles was performed by dipping Nafion LS films in a solution of TiO nanoparticles. The uniformity of the TiO incorporation was detected by UV-visible spectroscopy. The morphology of the Nafion, Nafion/TiO nanoparticles thin films, and the changes due to the annealing procedure were investigated by atomic force microscopy. Interestingly, the AFM investigation showed that Nafion and Nafion/TiO LS films have thermal stability up to 600°C.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
