Xylan/chitosan composites prepared by an ionic liquid system with unique antioxidant properties  

作　　者：Hailong Gao Na Liu Shuzhen Ni Haixia Lin Yingjuan Fu 

机构地区：[1]Key Laboratory of Pulp&Paper Science and Technology of Ministry of Education,Qilu University of Technology,Jinan,Shandong,250353,China [2]Department of Pulp and Paper Science and Technology,Nanjing Forestry University,Nanjing,Jiangsu,210037,China

出　　处：《Journal of Bioresources and Bioproducts》2017年第3期100-104,共5页生物质资源与工程（英文）

基　　金：support from the key research and development program of Shandong province (Grant No.2016GGX108002);the National Natural Science Fund (31370581).

摘　　要：Antioxidant function and solubility in water are highly desirable in many applications of chitosan.In this paper,a xylan/chitosan composite was prepared in an ionic liquid system using glutaraldehyde as a crosslinking agent.The antioxidant activity,reducing capacity and metal ion chelating ability of the resulting composite were determined.The chemical structure and thermal stability were analyzed by FT-IR,XRD and TGA.The results showed that chitosan was successfully cross-linked with xylan by glutaraldehyde in the ionic liquid system.Compared to pure chitosan,the ABTS·+scavenging activity of the xylan/chitosan composite increased from 10.56%to 97.59%.After cross-linking with xylan by glutaraldehyde,the reducing power of xylan/chitosan composite increased from 0.054 to 2.109.The capacity of chelating metal ion of the composite also increased from 42.35%to 86.71%compared to that of pure chitosan.An underlying mechanism was proposed to account for the improvement of the chemical properties of the chitosan in the composite.

关 键 词：CHITOSAN XYLAN Composite Ionic liquid ANTIOXIDANT Chelating metal ion 

分 类 号：TB3[一般工业技术—材料科学与工程]