利用漆酶催化，使4-香豆酸与聚木糖发生接枝共聚反应，从而改善聚木糖的成膜性能.通过红外光谱(FT-IR)、核磁共振碳谱(13 C NMR)、裂解-气相色谱/质谱(Py-GC/MS)联用等分析，表明接枝反应后聚木糖与4-香豆酸之间产生化学键连接，发生了接枝共聚反应；通过聚合度测试，接枝后聚木糖的聚合度提高了17．78％；薄膜拉伸性能的测试结果得出，接枝反应后聚木糖薄膜的杨氏模量提高了25．29％，拉伸强度提高了19．41％.聚木糖与4-香豆酸之间的接枝作用在增强薄膜性能中发挥了重要的作用，接枝后聚木糖制得的薄膜具有良好强度性能.
The reaction of graft copolymerization of xylan with 4-coumaric acid by laccase-catalyzed oxidation,in a way to improve quality of filming of xylan.It was analyzed by infrared FT-IR analysis,13 C NMR analysis,Py-GC/MS analysis techniques for determining the reaction between xylan and 4-coumaric acid which were chemi-cally connected,and occurred copolymer.By testing the degree of polymerization,results showed that the de-gree of polymerization of the xylan improved 17.78%;and the films showed a significant increase in Young's modulus by 25.29%,tensile strength increased from 0.601 to 0.753 MPa and 1.020 to 1.218 MPa,respectively. The grafting between xylan and laccase-catalyzed oxidation of 4-coumaric acid played an important role in rein-forcing the films.The superior properties of the new films could have great potential applications.
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