Cheng Huai N, Biswas Atanu, Kim Sanghoon, Alves Carlucio R, Furtado Roselayne F
Southern Regional Research Center, USDA Agricultural Research Service, 1100 Robert E. Lee Blvd., New Orleans, LA 70124, USA.
National Center for Agricultural Utilization Research, USDA Agricultural Research Services, 1815 N. University Street, Peoria, IL 61604, USA.
Polymers (Basel). 2021 Jan 18;13(2):291. doi: 10.3390/polym13020291.
Xylan is a major type of hemicellulose that has attracted a lot of research and development activities. It is often derivatized in order to improve its properties. In the literature, hydrophobic modification of polymers is often used to produce surfactant-like materials and associative thickeners. In this work, we have derivatized xylan with alkyl ketene dimer (AKD) and two types of alkenyl succinic anhydrides (ASAs). The xylan-AKD derivatives have been made at 90 °C, using dimethyl sulfoxide as solvent and 4-dimethylaminopyridine as promoter. Samples with degrees of substitution (DS) up to 0.006 have been produced. The xylan-ASA derivatives have been synthesized at 120 °C in dimethyl sulfoxide with DS up to 0.105-0.135. The structures of these products have been confirmed with NMR and FT-IR. These xylan derivatives increase the structural diversity of xylan and provide additional options for people seeking to use hydrophobically modified polysaccharides in their applications.
木聚糖是半纤维素的一种主要类型，已引发了大量的研发活动。它常被衍生化以改善其性能。在文献中，聚合物的疏水改性常用于生产类似表面活性剂的材料和缔合增稠剂。在本工作中，我们用烷基烯酮二聚体（AKD）和两种烯基琥珀酸酐（ASA）对木聚糖进行了衍生化。木聚糖 - AKD衍生物是在90°C下，以二甲基亚砜为溶剂、4 - 二甲基氨基吡啶为促进剂制备的。已制备出取代度（DS）高达0.006的样品。木聚糖 - ASA衍生物是在120°C的二甲基亚砜中合成的，DS高达0.105 - 0.135。这些产物的结构已通过核磁共振（NMR）和傅里叶变换红外光谱（FT - IR）得到证实。这些木聚糖衍生物增加了木聚糖的结构多样性，并为那些试图在其应用中使用疏水改性多糖的人提供了更多选择。
