School of Material Science & Chemical Engineering, Hubei University of Technology, Wuhan, Hubei 430068, China.
Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450000, China.
Int J Biol Macromol. 2024 Jun;270(Pt 1):132154. doi: 10.1016/j.ijbiomac.2024.132154. Epub 2024 May 10.
Flaxseed oil, rich in α-linolenic acid, plays a crucial role in various physiological processes. However, its stability presents certain challenges. In this study, the natural lignin-carbohydrate complex (LCC) was used to prepare the physical and oxidative stability of flaxseed oil-in-water emulsions. The LCC was characterized by HPLC, GPC, and FT-IR. The stability of emulsions was evaluated by viscosity, modulus, and micro-morphology changes. Then, the oxidation products were monitored by UV-vis spectrophotometer and HPLC. The results revealed that the high internal phase emulsion (HIPE) was successfully prepared with 2.5 wt% LCC at an oil/water ratio of 75/25 (v/v). Small droplet size (13.361 μm) and high viscosity (36,500 mPa·s) were found even after 30-day storage. Steric interactions of the LCC play a crucial role in ensuring stability, intricately linked to the interfacial properties of the emulsion. Meanwhile, the oxidative stability of α-linolenic acid in the encapsulated flaxseed oil was significantly higher than that in the bulk flaxseed oil. The results revealed that the LCC as a suitable emulsifier opens a new window for the storage of functional lipids rich in polyunsaturated fatty acids.
亚麻籽油富含α-亚麻酸，在各种生理过程中起着至关重要的作用。然而，其稳定性存在一定的挑战。在这项研究中，利用天然木质素-碳水化合物复合物（LCC）来制备亚麻籽油-水乳液的物理和氧化稳定性。通过高效液相色谱（HPLC）、凝胶渗透色谱（GPC）和傅里叶变换红外光谱（FT-IR）对 LCC 进行了表征。通过粘度、模量和微观形貌的变化来评估乳液的稳定性。然后，通过紫外可见分光光度计和高效液相色谱（HPLC）监测氧化产物。结果表明，在油/水比为 75/25（v/v）时，可使用 2.5wt%的 LCC 成功制备高内相乳液（HIPE）。即使在 30 天的储存后，仍发现小的液滴尺寸（13.361μm）和高粘度（36500mPa·s）。LCC 的空间位阻相互作用在确保稳定性方面起着至关重要的作用，这与乳液的界面性质密切相关。同时，包埋在亚麻籽油中的α-亚麻酸的氧化稳定性明显高于块状亚麻籽油。结果表明，LCC 作为一种合适的乳化剂，为富含多不饱和脂肪酸的功能性脂质的储存开辟了新的途径。
