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。
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 theβcrystal 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 C.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.
作者
张欢
孙尚德
时紫云
张浩
陈小威
ZHANG Huan;SUN Shangde;SHI Ziyun;ZHANG Hao;CHEN Xiaowei(College of Food Science and Technology,Henan University of Technology,Zhengzhou 450001,China;National Engineering Laboratory/Key Laboratory of Henan Province,Henan University of Technology,Zhengzhou 450001,China)
出处
《中国油脂》
CAS
CSCD
北大核心
2023年第3期90-94,122,共6页
China Oils and Fats
基金
广东省重点领域研发计划项目(2022B0202010003)
河南工业大学粮油食品学科国家工程实验室/省重点实验室开放课题(NL2021002)。
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
rapid cooling temperature
gelator dosage
phytosterol
oryzanol
oleogel
physical property
