- Tytuł:
- Analysis of free volumes and light transmission in hydrogel and silicone-hydrogel polymer contact lenses
- Autorzy:
-
Kocela, A.
Miedzinski, R.
Filipecka, K.
Filipecki, J. - Powiązania:
- https://bibliotekanauki.pl/articles/173601.pdf
- Data publikacji:
- 2016
- Wydawca:
- Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
- Tematy:
-
positron annihilation
UV-vis-NIR
polymers
contact lenses
free volume - Opis:
- The free volume holes and light transmission of hydrogel and silicone-hydrogel polymer contact lenses were investigated. As the material, the Proclear family (omafilcon A) of hydrogel contact lenses and the Biofinity family (comfilcon A) of silicone-hydrogel contact lenses were used. Positron annihilation lifetime spectroscopy was used to characterize geometrical sizes and fractions of the free volume holes in the investigated samples. There was a clear difference in the size of free volume holes and the fractional free volume between silicone-hydrogel and hydrogel polymer contact lenses. These changes are shown by a thorough analysis of the long-lived component of lifetime of ortho-positronium. At the same time, UV-vis-NIR in the spectral range 200-1000 nm studies were performed on the same samples of contact lenses spectrometry.
- Źródło:
-
Optica Applicata; 2016, 46, 1; 35-45
0078-5466
1899-7015 - Pojawia się w:
- Optica Applicata
- Dostawca treści:
- Biblioteka Nauki
Artykuł