Structural Features and Transport Properties of Hybrid Membranes Based on Polylactide with Additives of Star-Shaped Macromolecules

Using biodegradable polymer, polylactide, two composites containing 5 wt % fillers, which are star-shaped macromolecules with a branching center, C60 fullerene, and grafted polymer arms of various nature, have been synthesized. The structural features and mechanical properties of the prepared film membranes were studied. The density and contact angles were determined to characterize the physical properties. The transport properties were studied by measuring the permeability of He, O2, N2, and CО2. It is shown that the incorporation of star-shaped modifiers into the polylactide matrix leads to a slight decrease in the permeability coefficients for all gases, but the ideal selectivity for O2/N2, Hе/N2, and CО2/N2 gas pairs increases.