Abstract：
The microencapsulation of polysaturated fatty acids by spray drying remains a challenge due to their susceptibility to oxidation. In this work, antioxidant Pickering emulsions were attempted as feeds to produce oxidation stable tuna oil microcapsules. The results indicated that the association between chitosan (CS) and ovalbumin (OVA) was a feasible way to fabricate antioxidant and wettable complexes and a high CS percentage favored these properties. The particles could yield tuna oil Pickering emulsions with enhanced oxidation stability through high-pressure homogenization, which were successfully spray dried to produce microcapsules with surface oil content of 8.84 % and microencapsulation efficiency of 76.65 %. The microcapsules exhibited significantly improved oxidation stability and their optimum peroxide values after storage at 50 °C, 85 % relative humidity, or natural light for 15 d were 48.67 %, 60.07 %, and 39.69 % respectively lower than the powder derived from the OVA-stabilized emulsion. Hence, Pickering emulsions stabilized by the CS/OVA polyelectrolyte complexes are potential in the production of oxidation stable polyunsaturated fatty acid microcapsules by spray drying.
摘要：
通过喷雾干燥将多饱和脂肪酸微囊化仍然是一个挑战,因为它们易于氧化。在这项工作中,尝试将抗氧化剂Pickering乳液作为饲料来生产氧化稳定的金枪鱼油微胶囊。结果表明，壳聚糖（CS）和卵清蛋白（OVA）之间的缔合是制备抗氧化剂和可润湿复合物的可行方法，高CS百分比有利于这些性能。这些颗粒可以通过高压均化产生具有增强的氧化稳定性的金枪鱼油Pickering乳液，将其成功喷雾干燥，制得微胶囊，表面油含量为8.84％，微胶囊包封率为76.65％。在50°C下储存后，微胶囊显示出显着改善的氧化稳定性及其最佳过氧化物值，85%相对湿度,或15天的自然光为48.67%，60.07%,和39.69%分别低于衍生自OVA稳定乳液的粉末。因此，由CS/OVA聚电解质复合物稳定的Pickering乳液在通过喷雾干燥生产氧化稳定的多不饱和脂肪酸微胶囊中具有潜力。
