半纤维素酯化和醚化改性研究进展

近些年,从可再生资源获得新的功能性材料引起了广泛关注。半纤维素通过改性后可替代传统化石材料制备新型功能材料。从酯化和醚化两方面论述半纤维素化学改性的研究现状,并对半纤维素改性应用前景进行展望。半纤维素酰氯酯化赋予半纤维素斥水性能而酸酐酯化赋予亲水性能,羧甲基化、甲基化、季碱化和苄基化在半纤维素醚化方面取得很大进展。新的技术应用将会更大程度提高改性半纤维素取代度,为发掘其鲜为人知的用途提供了新窗口。

Progress in Modification of Hemicelluloses by Esterification and Etherfication

Preparation of novel and functional biopolymers from biomass has attracted extensive attention in recent years.Through modification,hemicelluloses can replace environmentally unfriendly fossil hydrocarbons as novel and functional biomaterials.This paper mainly reviewed esterification and etherification of hemicelluloses,and discussed prospects for modified hemicellulose application.Esterification with acyl chloride increases hydrophilic property of hemicelluloses,but anhydride decreases its hydrophobic property.Great progress has been made in carboxymethylation,methylation,quaternization and benzylation in the etherification modification of hemicelluloses.The new technology will improve the DS of modified hemicelluloses.These potential application and unexploited functions will open up new window for the utilization of hemicelluloses.