Maillard reaction products (MRPs) between xylan and chitosan or its derivatives was used to develop a series of antioxidants, antibacterial agents and absorbents on heavy metal ions, including xylan-chitosan, xylan-chitooligomer, xylan-glucosamine hydrochloride, xylan-taurine, xylan-chitooligomer-zinc complex (XCGZC) and highly porous chitosan-xylan-nanoTiO2 hybrid (CXTH). Their structure, UV absorbance, browning intensity, fluorescence changes, antioxidant activity and antimicrobial assessment were investigated to evaluate their promising applications. The results indicated that the properties of MRPs were closely related to molecular weight of model systems. The MRPs samples exhibited high radical scavenging activity. The XCGZC samples displayed the inhibition against E.coliand S. aureusas well as excellent antibacterial activity against Bacillus subtilis, salmonella typhimurium, bacillus megaterium. In addition, the water absorption of CXTH reached 1507 wt% in distilled water and 821 wt% in 0.9 wt% NaCl solution, showing smart salt-sensitivity behavior, and CXTH could adsorb efficiently the heavy metal ions such as Cu2+, Cr6+, Ni2+, Cd2+ and Hg2+.

Preparation and application of functional biomaterials based on xylan-chitosan

247th National Meeting (2014)

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