Sharif Digital Repository

Barrier properties of the biaxial oriented polypropylene (BOPP) films are the most important properties in food packaging industry. In this study different compatibilizers and materials were examined in order to find an appropriate blend composition to minimize the oxygen permeability of the films. It was observed that using organoclay and nanocomposits have positive effect on the oxygen permeability although the kind of compatibilizer is important. Through all evaluated materials the PVA (Poly(vinyl alcohol)) and MA (Maleic Anhydride) were the most successful selection for this goal. The BOPP film blended by PVA achieved the lowest oxygen transfer rate (300 cc 20 μm/m2 24 h atm) in compared... 

Blood oxygenation is the main performance characteristic of capillary membrane oxygenators (CMOs). Handling of natural blood in in vitro investigations of CMOs is quite complex and time-consuming. Since the conventional blood analog fluids (e.g. water/glycerol) lack a substance with an affinity to capture oxygen comparable to hemoglobin's affinity, in this study a novel approach using modified sulfite solution is proposed to address this challenge. The solution comprises sodium sulfite as a component, simulating the role of hemoglobin in blood oxygenation. This approach is validated by OTR (oxygen transfer rate) measured using native porcine blood, in two types of commercially available...