Eucommia ulmoides seed oil is a functional health oil with a high content of unsaturated fatty acids. However, excessively high content of unsaturated fatty acids can cause E. ulmoides seed oil to easily spoil. Microencapsulation technology can effectively encapsulate substances, thereby prolonging the spoilage time of oil products. In the present study, E. ulmoides seed oil from different manufacturers were analyzed by Agilent 7890B-5977A gas chromatography–mass spectrometry. Encapsulation efficiency, yield rate, and scanning electron microscopy results between microcapsules prepared use different wall materials and different methods (spray drying and complex coagulation) were compared to determine the best preparation process for microcapsules. The Wantong 892 professional oil oxidation stability tester was used to measure the induced oxidation time of the E. ulmoides seed oil and microcapsules. E. ulmoides seed oil comprises > 80% unsaturated fatty acids with a high α-linolenic acid content, followed by linoleic acid. The most promising combination was chitosan:gum arabic at 1:8 as the wall material and complex coagulation. The best preparation had a wall material concentration, stirring speed, aggregation pH, and core-to-wall ratio of 2.5%, 500 rpm, 4.2, and 1:4, respectively. Microcapsules prepared under these conditions exhibited higher yield and encapsulation efficiency (94.0% and 73.3%, respectively). The induced oxidation time of the E. ulmoides seed oil and microcapsules were 3.8 h and 13.9 h, respectively, indicating that microencapsulation can increase the oxidation induction time of this oil.

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杜仲籽油的成分分析及微胶囊化

杜仲籽油是一种不饱和脂肪酸含量高的功能性保健油。然而，过高的不饱和脂肪酸含量会导致杜鹃花籽油容易变质。微胶囊技术可以有效地包裹物质，从而延长油品的腐败时间。在本研究中，使用 Agilent 7890B-5977A 气相色谱-质谱法分析了来自不同制造商的 E. ulmoides 种子油。比较使用不同壁材料和不同方法（喷雾干燥和复合混凝）制备的微胶囊的包封率、产率和扫描电镜结果，以确定微胶囊的最佳制备工艺。使用万通892专业油品氧化安定仪测定黄花菜籽油及微胶囊的诱导氧化时间。E. ulmoides 种子油包含 > 80% 的不饱和脂肪酸，具有高 α-亚麻酸含量，其次是亚油酸。最有希望的组合是壳聚糖：1:8 的阿拉伯树胶作为壁材料和复合凝固。最佳制剂的壁材浓度、搅拌速度、聚集体 pH 值和芯壁比分别为 2.5%、500 rpm、4.2 和 1:4。在这些条件下制备的微胶囊表现出更高的产量和封装效率（分别为 94.0% 和 73.3%）。E. ulmoides 种子油和微胶囊的诱导氧化时间分别为 3.8 h 和 13.9 h，