Constructing of porous 1,2-polybutadiene/Fe(II)salen oxygen-scavenging fibrous film to improve the oxidation stability of walnut oil

This study proposes a novel approach for fabricating a high-efficiency, oxygen-scavenging 1,2-polybutadiene (PB)/Fe(II)salen fibrous film (PBUF) via electrospinning, aimed at improving the oxidative stability of edible oils. By optimizing the process using response surface methodology with a Box-Behnken design (RSM-BBD), the PBUF with a minimum fiber diameter of 1.18 μm and a defect-free microscale structure was successfully prepared in a single step. Owing to its high surface area and porous structure, PBUF showed an increase in maximum oxygen-scavenging uptake of 56.07% and 1003.88% compared to the 1,2-polybutadiene (PB)/Fe(II)salen cast film (PBCF) and a commercial iron-based scavenger, respectively ( p  < 0.05).When placed in the headspace of sealed walnut oil during accelerated oxidation (63 °C for 15 days), the PBUF (5 mg/g) can significantly inhibit the oil oxidation, resulting in reductions of 27.10% in peroxide value (PV), 36.19% in conjugated dienes (CD), and 52.10% in p-anisidine value (p-AV).