| 刘 宏,刘慧敏,冯国霞，等.植物甾醇+γ-谷维素型凝胶油的制备及其影响因素的研究[J].中国油脂,2015,40(6):.[LIU Hong,LIU Huimin,FENG Guoxia，etc.Preparation of phytosterols +γ-oryzanol-based organogel and its influence factors[J].China Oils and Fats,2015,40(6):.] |
| 植物甾醇+γ-谷维素型凝胶油的制备及其影响因素的研究 |
| Preparation of phytosterols +γ-oryzanol-based organogel and its influence factors |
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| DOI： |
| 中文关键词: 植物甾醇 +γ-谷维素 凝胶油 甾醇酯 物性 |
| 英文关键词:phytosterols γ-oryzanol organogel phytosterol esters property of matter |
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| 中文摘要: |
| 以米糠油为油溶剂制备植物甾醇+γ-谷维素型凝胶油，采用流变仪、质构仪、X-射线衍射仪和偏振光显微镜分别研究了凝胶油的流变性、硬度、脆性、晶型、晶体形态等。结果表明：植物甾醇与γ-谷维素质量比为40∶60时所形成的凝胶油硬度最大，熔点最高，脆性最小；随着植物甾醇与γ-谷维素添加量的增大，凝胶油硬度和熔点随之增大，脆性随之减小；甾醇酯和植物甾醇不能使体系凝胶化，甾醇酯的存在会表现出拮抗性，阻碍凝胶的形成，凝胶油的硬度、黏度随着甾醇酯添加量的增加而减小，脆性和熔点则随着甾醇酯添加量的增加而增大，其次，凝胶形成的时间随着甾醇酯添加量的增加而延长；冷却过程中施加一定的剪切会降低凝胶体系的硬度、黏度和熔点，脆性增大；植物甾醇+γ-谷维素型凝胶油为β-晶型，随着储藏时间的延长，其中的纤维网络结构逐渐形成并聚集延伸。 |
| 英文摘要: |
| Phytosterols +γ-oryzanol-based organogel was prepared with rice bran oil as the oil solvent. The rheology, hardness, brittleness, crystal form and crystal morphology of the organogel were determined by rheometer, texture analyzer, X-ray diffraction and polarizing microscope. The results showed that when the mass ratio of phytosterols to γ-oryzanol was 40∶60, the hardness and the melting point of organogel were the highest, while the brittleness was the lowest. The hardness and the melting point of the organogel increased with the increase of the amounts of phytosterols and γ- oryzanol, while the brittleness was the opposite. The mixture of phytosterol esters and phytosterols could not form gel in rice bran oil. The presence of phytosterol esters exhibited resistance to hinder gel forming. The hardness and the viscosity of the organogel reduced as the amount of phytosterol esters improved, while the melting point and the brittleness were the opposite. In addition, the gel formation time prolonged as the amount of phytosterol esters increased. Besides, when shear was applied in the cooling process, the hardness, the viscosity and the melting point of the organogel reduced, while brittleness increased. The crystal form of phytosterols +γ-oryzanol-based organogel was β-form crystal. With storage time prolonging, the network structure of fibers gradually formed and developed in the organogel. |
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