Ng Siou Pei, Khor Yih Phing, Lim Hong Kwong, Lai Oi Ming, Wang Yong, Wang Yonghua, Cheong Ling Zhi, Arbi Nehdi Imededdine, Mansour Lamjed, Ping Tan Chin
Department of Bioscience, Faculty of Applied Sciences, Tunku Abdul Rahman University College, Jalan Genting Kelang, Setapak, Kuala Lumpur 53300, Malaysia.
Department of Food Technology, Faculty of Food Science and Technology, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia.
Foods. 2020 Jul 3;9(7):877. doi: 10.3390/foods9070877.
The present study focused on investigating the storage stability of oil-in-water (O/W) emulsions with high oil volume fractions prepared with palm olein-based diacylglycerol oil (POL-DAG)/soybean oil (SBO) blends at 25 °C. The incorporation of different ratios of oil blends significantly influenced ( < 0.05) the texture, color, droplet size distribution, and rheological parameters of the emulsions. Only emulsions incorporated with 10% to 20% POL-DAG in oil phase exhibited pseudoplastic behavior that fitted the Power Law model well. Furthermore, the O/W emulsions prepared with POL-DAG/SBO blends exhibited elastic properties, with higher than . During storage, the emulsion was found to be less solid-like with the increase in tan δ values. All emulsions produced with POL-DAG/SBO blends also showed thixotropic behavior. Optical microscopy revealed that the POL-DAG incorporation above 40% caused aggregated droplets to coalesce and flocculate and, thus, larger droplet sizes were observed. The current results demonstrated that the 20% POL-DAG substituted emulsion was more stable than the control emulsion. The valuable insights gained from this study would be able to generate a lot more possible applications using POL-DAG, which could further sustain the competitiveness of the palm oil industry.
本研究着重于考察在25℃下用棕榈油精基甘油二酯油（POL-DAG）/大豆油（SBO）混合物制备的高油相体积分数水包油（O/W）乳液的储存稳定性。不同比例油混合物的加入对乳液的质地、颜色、液滴尺寸分布和流变学参数有显著影响（<0.05）。只有油相中加入10%至20% POL-DAG的乳液表现出符合幂律模型的假塑性行为。此外，用POL-DAG/SBO混合物制备的O/W乳液表现出弹性性质，G'高于G''。在储存期间，随着损耗角正切值的增加，乳液被发现更不像固体。所有用POL-DAG/SBO混合物制备的乳液也表现出触变性。光学显微镜显示，加入超过40%的POL-DAG会导致聚集的液滴聚结和絮凝，因此观察到更大的液滴尺寸。目前的结果表明，20% POL-DAG替代的乳液比对照乳液更稳定。从这项研究中获得的宝贵见解将能够产生更多使用POL-DAG的可能应用，这可以进一步维持棕榈油行业的竞争力。
