| 刘尊，仇超颖，宋佳，杨雪，张宁，汪勇.脂肪酶催化饱和单甘酯与棕榈油酯交换制备含甘油二酯油及其结晶特性研究[J].中国油脂,2017,42(6):.[LIU Zun1,2, QIU Chaoying1,2, SONG Jia1,2, YANG Xue1,2, ZHANG Ning1,2, WANG Yong.Preparation and crystallization behaviors of diacylglycerol-contained oil by interesterification of saturated monoacylglycerols and palm olein catalyzed by lipase[J].China Oils and Fats,2017,42(6):.] |
| 脂肪酶催化饱和单甘酯与棕榈油酯交换制备含甘油二酯油及其结晶特性研究 |
| Preparation and crystallization behaviors of diacylglycerol-contained oil by interesterification of saturated monoacylglycerols and palm olein catalyzed by lipase |
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| DOI： |
| 中文关键词: 饱和单甘酯 脂肪酶Lipozyme TL IM 酯交换 含DAG油 固体脂肪含量 晶型 |
| 英文关键词:saturated monoacylgcerols Lipozyme TL IM interesterification DAG-contained oil solid fat content crystal form |
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| 中文摘要: |
| 采用脂肪酶Lipozyme TL IM催化饱和单甘酯和棕榈油(24?℃)进行酯交换反应，酯交换油脂经分子蒸馏分离纯化得到含28.10%甘油二酯(DAG）油。对比分析了酯交换反应前后油脂的甘油酯组成和脂肪酸组成、热力学性质以及固体脂肪含量（SFC）。结果表明：含DAG油的不饱和脂肪酸含量提高至42.94%，熔点降低至45.4?℃，SFC值显著降低；X射线衍射结果表明含DAG油的晶型以β型和β′型为主；偏光显微镜观察结果表明含DAG油的晶体网络结构主要由球状晶体聚集而成，且晶体尺寸变小，固液相分散更均匀；结晶熔化曲线、SFC分布以及结晶特性均表明含DAG油适合用作食品专用油脂基料。 |
| 英文摘要: |
| Interesterification of saturated monoacylgcerols and palm olein (24?℃) was catalyzed by Lipozyme TL IM, then the oil containing 28.10% DAG was separated by molecular distillation. The glyceride composition, fatty acid composition, thermodynamic property and solid fat content (SFC) of the oil before and after interesterification were detected. The results showed that the contents of unsaturated fatty acid of the DAG-contained oil increased to 42.94%; the melting decreased to 45.4?℃ and SFC decreased remarkably. XRD results indicated that the main crystal forms of the DAG-contained oil mixtures were β and β′. PLM results indicated that crystal network of DAG-contianed oil was mainly composed of spherical crystals with smaller size, and the distribution of solid and liquid phase was more evenly. The crystallization and melting curve, SFC distribution and crystallization behavior indicated that the DAG-contained oil could be applied as a special base oil in food industry. |
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