凝胶剂对三元油脂凝胶结构及其荷载量的影响

Effects of Structurants on Structure and Loading Capacity of Ternary Organogels

以玉米油为基料油,通过添加3种不同的凝胶剂(谷甾醇+卵磷脂,神经酰胺和乙基纤维素),制备了荷载姜黄素的三元油脂凝胶体系,并探讨了不同凝胶剂对三元油脂凝胶的流变行为、固体脂肪含量等宏观性质及其微观形貌、晶型结构等微观性质以及荷载量的影响.实验结果表明,谷甾醇+卵磷脂与神经酰胺形成的三元凝胶结构相似,都形成纤维状的结晶结构;前者的结构更为紧密,荷载量[(3.14±0.10)mg/g]和包埋率[(62.78±2.01)%]较高;乙基纤维素形成的凝胶结构与前两种有很大不同,其结晶结构为颗粒状,晶体较小,结构较为松散,但是由于其较高的制备温度,它的荷载水平最佳,荷载量和包埋率分别为(4.810±0.174)mg/g和(96.19±3.48)%.这说明油脂凝胶剂的种类对三元油脂凝胶的性能、微观结构和荷载量都有显著影响.

Ternary curcumin-organogels were prepared based on corn oil and by using sitosterol ＋ letithin, cera- mide, ethyecellulose as thestructurants. Then, the effects of the structurants on the macroscopic properties （the rheological behaviors, the solid fat content, etc） and the microscopic properties （the microstructures, the crys- talline structure, etc） of ternary organogels were discussed, and the conesponding loading capacities were also evaluated. Experimental results show that （ 1 ） the structures of sitosterol ＋ letithin-organogels and eeramide-structures, and it is granular with a smaller crystal and relatively loose network ; and （3） because of higher prepa- ration temperature, ethyecellulose-organogels show the highest load level, specifically, LC and EE are respectively （4. 810 ± 0. 174）mg/g and （96. 19±3.48 ）%. The above results indicate that the structurants significantly affect the properties, microstructures and loading capacity of organogels.