Wang Chenxi, Sun Cuixia, Lu Wei, Gul Khalid, Mata Analucia, Fang Yapeng
Department of Food Science and Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China.
Compr Rev Food Sci Food Saf. 2020 Nov;19(6):2955-2971. doi: 10.1111/1541-4337.12621. Epub 2020 Sep 5.
Polyunsaturated fatty acids (PUFAs) play an important role in promoting brain development, decreasing the incidence of cardiovascular diseases, and reducing inflammation. However, PUFAs are inherently unstable and susceptible to oxidative deterioration due to two or more double bonds in their structure. Delivery systems have been developed to provide effective encapsulation and protection for PUFAs, and finally fulfill their health benefits. Emulsion-based encapsulation is one of the most promising techniques for the delivery of PUFAs. The emulsion composition and structure, as well as the storage conditions are regarded as key factors to influence the stability of emulsions. To maximize the resistance of PUFAs in emulsions against oxidation, emulsion structure design has been particularly highlighted, and different methods for tailoring emulsion structure have been developed. The current work is focused on the careful design of emulsion structure to improve the oxidative stability of PUFAs. Different types of emulsions, including conventional emulsions, multilayer emulsions, gelled emulsions, and Pickering emulsions are introduced, and their protective effect for PUFAs are discussed. The major role of interfacial structure in emulsions is emphasized. The effects of emulsifiers and involved modification methods on the interfacial structure are presented to further improve the stability of PUFAs during storage.
多不饱和脂肪酸（PUFAs）在促进大脑发育、降低心血管疾病发病率和减轻炎症方面发挥着重要作用。然而，由于其结构中存在两个或更多双键，PUFAs本质上不稳定，容易发生氧化变质。人们已经开发出递送系统，为PUFAs提供有效的包封和保护，最终实现其健康益处。基于乳液的包封是递送PUFAs最有前景的技术之一。乳液的组成和结构以及储存条件被视为影响乳液稳定性的关键因素。为了最大限度地提高乳液中PUFAs的抗氧化性，乳液结构设计受到特别关注，并且已经开发出不同的方法来调整乳液结构。目前的工作重点是精心设计乳液结构以提高PUFAs的氧化稳定性。介绍了不同类型的乳液，包括常规乳液、多层乳液、凝胶乳液和皮克林乳液，并讨论了它们对PUFAs的保护作用。强调了界面结构在乳液中的主要作用。介绍了乳化剂及其相关改性方法对界面结构的影响，以进一步提高PUFAs在储存期间的稳定性。
