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    Emulsifying properties of naturally acetylated xylans and their application in lutein delivery emulsion

    Year: 2022

    Journal: Carbohydr. Polym., Volume 296, NOV 15

    Authors: Wang, Shanyong; Gao, Wenhua; Wang, Yuhan; Song, Tao; Qi, Haisong; Xiang, Zhouyang

    Organizations: Natural Science Foundation of Guangdong Province [2020A1515011021]

    Keywords: Hemicelluloses; Xylan; Acetylation; Emulsifying; Lutein; Delivery emulsion

    Xylans play an important role in dispersing and lubricating cellulose fibrils in lignocellulosic plant cell walls. However, the effect of acetylation on the dispersing and emulsifying properties of xylan is still unclear. In this study, we show that the natural degree of acetylation is vital to ensure xylan an excellent water solubility and emulsifying ability. Alkali extracted xylans were artificially acetylated to degree of substitution (DSAc) between 0.12 and 2.00, while the DMSO extracted originally acetylated xylan (OAX) shows a DSAc of 0.18. Artificially acetylated xylans (AX) with DSAc value similar to OAX shows water solubility and emulsifying ability similar to those of OAX and the best among all the AX samples with different DSAc. They demonstrate excellent emulsifying properties with an emulsifying activity of similar to 1.3 and an emulsion cream index of similar to 5 %. AX with the natural DSAc value also demonstrates strong barrier effects in preparing lutein delivery emulsions.
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