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| 急冷温度及凝胶剂添加量对植物甾醇/谷维素油凝胶物理特性的影响 |
| Effect of rapid cooling temperature and gelator dosage on the physical properties of phytosterol/oryzanol oleogels |
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| DOI： |
| 中文关键词: 急冷温度 凝胶剂添加量 植物甾醇 谷维素 油凝胶 物理特性 |
| 英文关键词:rapid cooling temperature gelator dosage phytosterol oryzanol oleogel physical property |
| 基金项目: |
| Author Name | Affiliation | | ZHANG Huan1, SUN Shangde1, SHI Ziyun1, ZHANG Hao1, CHEN Xiaowei1,2 | 1.College of Food Science and Technology, Henan University of Technology, Zhengzhou 450001, China
2.National Engineering Laboratory/Key Laboratory of Henan Province,Henan University of Technology, Zhengzhou 450001, China |
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| 中文摘要: |
| 为促进植物甾醇/谷维素油凝胶在零反式、低饱和的营养型塑性脂肪中的应用，以大豆油为基料油，植物甾醇/谷维素为凝胶剂，在不同急冷温度（5、20℃）及凝胶剂添加量下制备油凝胶，测定不同急冷温度及凝胶剂添加量下植物甾醇/谷维素油凝胶的晶型、晶体形态、物理稳定性、质构和热力学特性的变化。结果表明：随着凝胶剂添加量的升高，油凝胶中晶体排列逐渐致密，硬度增大，熔点升高；尽管急冷温度对油凝胶的晶型（β晶型）没有明显影响，但相对于5℃急冷，20℃急冷得到的油凝胶晶体组装更为致密，物理稳定性增强；在与传统甘三酯固脂对比SFC与硬度和熔点的关系中发现，在油凝胶体系中熔点随SFC的增加呈现非线性关系增长，但低固体脂肪含量（4.85%）即可赋予植物甾醇/谷维素油凝胶较高的硬度。综上，急冷温度及凝胶剂添加量对植物甾醇/谷维素油凝胶的物理特性具有显著的影响。 |
| 英文摘要: |
| To promote the utilization of the phytosterol/oryzanol oleogels in the development of zero-trans, low saturated and nutritional plastic fats, with soybean oil as base oil, phytosterol/oryzanol as gelator, olegoels was prepared under different rapid cooling temperature(5, 20℃) and gelator dosages, and the changes of crystal form, crystal morphology, physical stability, texture and thermodynamic properties of phytosterol/oryzanol oleogels were investigated. The results showed that the hardness and melting point of the oleogels increased with the increase of gelator dosage, attributing to a denser arrangement of crystals. Although no obvious effect on the β crystal form of oleogels by rapid cooling temperature, the rapid cooling at 20℃ resulted in a denser crystals and higher physical stability compared with rapid cooling at 5℃. Compared with the traditional triglyceride solid fat, the relationship between SFC and hardness as well as melting point showed that the melting point increased in a non-linear with the increase of SFC in the oleogels system. Interestingly, a low SFC(4.85%) endowed a high hardness of phytosterol/oryzanol oleogels. To sum up, the rapid cooling temperature and gelator dosage have significant effect on the physical properties of phytosterol/oryzanol oleogels. |
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