College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, China.
Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou, China.
J Sci Food Agric. 2021 Mar 15;101(4):1314-1322. doi: 10.1002/jsfa.10739. Epub 2020 Sep 14.
Pine oil contains a high percentage of polyunsaturated fatty acids, which make it prone to oxidation. Luteolin (LUT) micro-nano particles with antioxidant properties can be used as stabilizers to form an edible oil-in-water Pickering emulsion to improve the oxidative stability of pine nut oil.
Under optimal preparation conditions, the LUT micro-nano particles and pine nut oil account for about 0.44 and 90.9 g·kg of the total mass of the emulsion, respectively. The LUT particles in the suspension have a mean particle size of about 479 nm, present a sheet-like structure with a cut surface of 30-50 nm, and can reduce the surface tension of deionized water. In the optimized Pickering emulsion, the emulsion droplets are approximately spherical and have a mean diameter of about 125.6 nm and uniform distribution. The optimized Pickering emulsion droplets can remain stable for up to 2 h in an environment where the pH levels are 7-8.5, ultraviolet B radiation (UVB) irradiation, of less than 5.0 g·kg , and at a temperature of 80 °C. The stability of the emulsion in simulated digestive fluid changed minimally. In the first 7 days of the accelerated oxidation experiment, LUT micro-nano particles not only successfully protected the integrity of emulsion droplets but also fully inhibited the peroxidation of pine oil.
The strong antioxidant properties of LUT micro-nano particles, and the dense protective layer they formed, stabilized the Pickering emulsion successfully. The particles also improved the oxidation stability of pine nut oil. © 2020 Society of Chemical Industry.
松油含有高比例的多不饱和脂肪酸，容易氧化。具有抗氧化性能的叶黄素（LUT）微纳颗粒可用作稳定剂，形成油包水型 Pickering 乳液，以提高松子油的氧化稳定性。
在最佳制备条件下，LUT 微纳颗粒和松子油分别约占乳液总质量的 0.44 和 90.9 g·kg。悬浮液中的 LUT 颗粒平均粒径约为 479nm，呈片状结构，断面尺寸为 30-50nm，能降低去离子水的表面张力。在优化的 Pickering 乳液中，乳液液滴近似为球形，平均直径约为 125.6nm，分布均匀。在 pH 值为 7-8.5、紫外线 B 辐射（UVB）小于 5.0 g·kg 和 80°C 的环境中，优化后的 Pickering 乳液液滴可稳定长达 2 小时。在模拟消化液中，乳液的稳定性变化很小。在加速氧化实验的前 7 天，LUT 微纳颗粒不仅成功保护了乳液液滴的完整性，而且完全抑制了松子油的过氧化。
LUT 微纳颗粒具有较强的抗氧化性能，其形成的致密保护层成功稳定了 Pickering 乳液。颗粒还提高了松子油的氧化稳定性。 © 2020 英国化学学会。
