Linseed oil presents different patterns of oxidation in electrospun TA fibrous mats and TA aging assays

Abstract

Oxidative deterioration is a major issue limiting the utilisation of linseed oil. This study investigated the effect of electrospun guar gum (GG) fibrous mats with addition of natural antioxidants on the oxidative stability of linseed oil. As a new technology, electrospinning was chosen to prepare nanofibrous mats. Besides, tannic acid (TA) was used as natural antioxidants and water was used as a solvent. The synthesised fibrous were smooth under the electron microscope, which had no defect structure and relatively uniform diameter. Electrospun GG fibrous mats containing TA were added to the linseed oil and the same amount of TA powder was used for comparison, then stored at 60 °C for 30 days to monitor the oxidation of oil. Conjugated dienes, peroxide value, p-anisidine value, thiobarbituric acid and fatty acid composition were used as indicators of oxidative stability. It was shown that TA can delay primary and secondary oxidation and improve oxidation stability. In conclusion, electrospun TA fibrous mats can play a more effective role than adding TA alone in antioxidation of linseed oil, which had potential applications in oil preservation.