张欢1,孙尚德1,时紫云1,张浩1,陈小威1,2.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[J].中国油脂,2023,48(3):.[ZHANG Huan1, SUN Shangde1, SHI Ziyun1, ZHANG Hao1, CHEN Xiaowei1,2.Effect of rapid cooling temperature and gelator dosage on the physical properties of phytosterol/oryzanol oleogels[J].China Oils and Fats,2023,48(3):.]
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
  
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:
作者单位
张欢1,孙尚德1,时紫云1,张浩1,陈小威1,2 1.河南工业大学 粮油食品学院郑州 450001
2.河南工业大学 国家工程实验室/省重点实验室, 郑州 450001 
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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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