脂溶性茶多酚制备工艺的研究  

Preparation of Fat Soluble Tea Polyphenol

作　　者：朱媛[1] 张雪松[2] 黄小忠[2] 

机构地区：[1]南京晓庄学院,南京210017 [2]江苏农林职业技术学院,镇江212400

出　　处：《中国粮油学报》2014年第6期74-78,92,共6页Journal of the Chinese Cereals and Oils Association

摘　　要：本试验以乙酸酐为酰化剂对茶多酚乙酰化从而增强其脂溶性,以衡量脂溶性的产物透光率为参数。在分析乙酰化中料液比、吡啶催化剂用量、反应温度、时间等单因素对产物性能影响的基础上,利用响应面分析法优化了脂溶性茶多酚制备的条件并建立了可靠的多元二次回归模型。结果表明,当料液比为1∶8.03,催化剂用量为0.31 g,在61.3℃下回流反应1.93 h,改性茶多酚透光率达到了1.000,为茶多酚对照组的2.08倍。其油脂抗氧化保护系数为6.576 d,DPPH·抑制率0.922 1,分别提高了2.14倍和2.98倍。与丁基羟基茴香醚(BHA)与特丁基对苯二酚(TBHQ)相比,改性茶多酚的保护系数和DPPH·抑制率分别提高3.1倍、2.5倍、1.07倍、1.05倍。Tea polyphenol has been acetylated by acetic anhydride as acylating agent so as to enhance fat solubleas and using light transmittance as a parameter to measure the fatsoluble product. Based on the effects of single factors as acetylation of feed liquid ratio, pyridine catalyst dosage, reaction temperature and time on the properties of prod- ucts, the Box- Behnken analysis had been adopted to optimize the fat soluble tea polyphenol preparation conditions and establish a reliable multiple quadratic regression model. The results showed that on condition that the feed liquid ratio of 8.03, catalyst dosage 0.31 g, at 61.3 ~C reflux reaction 1.93 h, modification of tea polyphenols had satisfied fat soluble. The light transmittance was 1. 000, which was 2.08 times than unmodified tea polyphenol. Its oil an- tioxidant protection coefficient was 6. 576 d, DPPH suppression ratio 0.922 1, which were increased 2.14 times and 2.98 times. Compared with BHA and TBHQ, the protection coefficient and DPPH suppression ratio of modified tea polyphenol are rised 3.1 times, 2.5 times, 1.07 times and 1.05 times.

关 键 词：茶多酚 乙酰化 脂溶性 

分 类 号：TQ243.2[化学工程—有机化工]