Optical properties
Transparency of the TPS and the TPS-CNF films was
studied using UV/Visible light spectroscopy. A Perkin
Elmer UV/Vis Spectrometer Lambda 2S (Überlingen,
Germany) was used to measure the light transmittance of
the films in a light wavelength area from 300 to
1000 nm. The scan speed used in the analysis was
240 nm/min, and three replicates of each material were
measured.