Cao Chuan, Xu Li, Xie Peng, Hu Jinwei, Qi Jun, Zhou Yibin, Cao Lei
Anhui Engineering Laboratory for Agro-products Processing, Anhui Agricultural University Hefei 230036 China
Anhui Vocational College of Grain Engineering Hefei 230011 China.
RSC Adv. 2020 Feb 12;10(11):6584-6591. doi: 10.1039/c9ra10748g. eCollection 2020 Feb 7.
Large-ring cyclodextrins LR-CDs (CD-CD) were obtained from rice starch using cyclodextrin glycosyltransferase (CGTase), and were used as a wall material for embedding α-tocopherol. Complexes of α-tocopherol and LR-CDs were prepared by co-precipitation. A molar ratio of α-tocopherol/LR-CD of 1 : 2 showed the highest encapsulation efficiency. The surface morphology of the complex particles was observed to vary from irregular flakes to the formation of smaller clusters of particles using scanning electron microscopy (SEM). Based on H NMR and FT-IR observations, the inclusion complexes exhibited significant chemical shifts of 0.3 ppm and decreased peak signals. In addition, thermal analysis showed that the microcapsules improved the thermostability of the α-tocopherols. Antioxidant activity analysis proved the stability of α-tocopherol during storage. This study could serve as a reference for the more effective use of LR-CDs as wall materials.
使用环糊精糖基转移酶（CGTase）从大米淀粉中获得大环环糊精（LR-CDs，即CD-CD），并将其用作包埋α-生育酚的壁材。通过共沉淀法制备α-生育酚与LR-CDs的复合物。α-生育酚/LR-CD的摩尔比为1∶2时包封率最高。使用扫描电子显微镜（SEM）观察到复合颗粒的表面形态从不规则薄片变化为形成较小的颗粒簇。基于核磁共振氢谱（H NMR）和傅里叶变换红外光谱（FT-IR）观察，包合物显示出0.3 ppm的显著化学位移和降低的峰信号。此外，热分析表明微胶囊提高了α-生育酚的热稳定性。抗氧化活性分析证明了α-生育酚在储存期间的稳定性。本研究可为更有效地将LR-CDs用作壁材提供参考。
