【作者】 陈丽云；

【导师】 李炎；

【作者基本信息】 暨南大学 ， 分析化学， 2001， 硕士

【摘要】 摄入过量的脂肪会引发肥胖、冠心病、高血压和某些癌症。故此，脂肪替代品已风靡全世界。蔗糖聚酯作为一种新型脂肪替代品，性质与常用食用油脂相似，其研究及应用有着广阔的前景。 本论文以超临界技术合成油酸甲酯，可将产率提高到94.83％，反应时间更是缩短到常压回流合成法所需时间的1/18；采用微波辐射加热法来研究蔗糖聚油酸酯的合成，结果表明：微波辐射的输出功率和辐射时间对此反应效果有明显的影响，在反应时间为40min，微波辐射功率为456w/h的条件下，反应产物的产率最高可达87.30％，与传统加热减压合成方法相比，产率提高了将近17％，还大幅度地缩短了反应时间，反应时间缩短到传统加热合成法所需时间的1/10，充分体现了微波辐射化学合成的“快速、收率高、操作方便、经济”等优点。 实验中得到的蔗糖聚油酸酯为金黄色、透明的油状液体，物理性质与常用食用油脂非常相近，有较好的热稳定性和抗氧化稳定性，具备了作为脂肪替代品的条件。 本论文的成果将为实现蔗糖聚酯的大规模工业化生产开辟一条新的、更快速、更有效的途径。更多还原

【Abstract】 Excessive dietary fat intake is associated with increasing risk of obesity, high blood cholesterol, coronary heart disease and some types of cancer. Foods formulated with fat substitutes are an enjoyable alternative than familiar high-fat foods. At present fat substitutes are fashionable all over the world. Sucrose polyester is a new functional fat substitute. In the world, the research and development of sucrose polyester still is promising. In this paper, oleic acid methyl esters were synthesized by methyl alcohol and oleic acid in supercritical state with supercritical fluid C02, and sucrose polyester were synthesized with sucrose and oleic acid methyl ester as materials by microwave radiation. Because the SFC has great diffusivity and good solubility, the gas-solid phase reaction is carried out in a similar homogeneous situation. A yield of oleic acid methyl ester about 94.83% was obtained the action time was reduced from 9 hours to 30 minutes. In addition, the influences of the reaction time and reaction power under the microwave radiation on the yields were also studied. The microwave radiation method takes only 1/10 time as short as the time taken by traditional heating method, and the yield of 87.3 0% is higher than that by the traditional heating method by about 17%. The analysis results of the product show that the physical properties of sucrose polyester are similar to the normal food oil, and the product possesses good anti-oxidation and thermal stability. We believe that our results will open a new way to realize a large-scale industrialized manufacture of sucrose polyester.更多还原