Abstract
Active compounds derived from pomegranate and sea-buckthorn were encapsulated into polylactide (PLA-based fibers) and poly(vinyl-pirrolidone) (PVP-based fibers) nanofibers using electrospinning technique. The focus was on the antioxidant activity of prepared nonwovens. Morphology, thermal, and mechanical properties were also examined. Due to the different physical and chemical properties of the basic polymers, the obtained results indicate that PLA-based fibers have better antioxidant activity than PVP-based ones. All prepared samples were formed from bead-less continuous fibers networks, but in the case of PLA-based samples some small irregularities in the structure occurred. Mechanical properties were improved with the addition of active compounds in most of the cases, while thermal properties were slightly affected. Preserved antioxidant activity of active compounds by encapsulation and good material properties significant for manipulation, make these functional materials promising candidates for application in cosmetics.
Highlights
An imbalance in the generation of free radicals could induce oxidative stress in different mediums [1]
The main aim of this work was the examination of the antioxidant activity of functional materials containing pomegranate seed oil, sea-buckthorn oil, and extract of fermented pomegranate juice encapsulated into two different polymers: polylactide (PLA-based fibers) and poly(vinyl-pyrrolidone)
It was necessary to confirm the fiber morphology of pure polymers, so PLAand PVP-based nonwovens were examined by SEM (Figure 1), and after that samples with active compounds were prepared
Summary
An imbalance in the generation of free radicals could induce oxidative stress in different mediums [1]. Pomegranate and its extracts from all fruit parts were used through history from ancient times, as it was well known to have good activity [4,5]. Nowadays it is the subject of many studies examining its chemical composition and mechanisms of activity. Because of the high content of saturated and unsaturated fatty acids and many other valuable ingredients, they express antioxidant, anti-inflammatory, and regenerative effects to the skin [8]. They are often used in products for mature skin, and for treatment of wounds and scars.
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