Nanoparticle

Mass spectrometry

Chemistry

Materials science

Antioxidant

Chromatography

Composite number

Engineering

Composite material

Dispersity

Electrospray

Nanotechnology

Organic chemistry

Polymer chemistry

Gelatin

Polyphenol

Chitosan

Nuclear chemistry

Chemical engineering

Materials & Design

In this study, gelatin (GEL) extracted from grass carp and tea polyphenols (TP) were encapsulated in chitosan (CS) nanoparticles using an innovative electrospray based ionic gelation method. CS-TP nanoparticles were fully optimized in terms of encapsulation efficiency and polydispersity. The average diameter of the optimal CS-TP nanoparticles was 205 ± 14 nm, and encapsulation efficiency of 66.7% ± 9.9% was achieved. The effects of CS-TP nanoparticles on the physicochemical properties of the GEL/CS-TP composite films were studied. Our results showed that the combination of CS-TP and grass carp gelatin (GEL) can not only weaken the strong interaction between GEL and TP, but also improved the swelling and mechanical properties of GEL. Furthermore, GEL/CS-TP30% composite film showed strong barrier and good mechanical properties, low UV transmission, exhibited high free radical-scavenging ability and prolonged the stability of an easily oxidizable oil for over 14 days, making it a suitable film for use as an edible packaging material.

Physicochemical properties of gelatin films containing tea polyphenol-loaded chitosan nanoparticles generated by electrospray