利用漆酶-TEMPO 体系选择性地氧化壳聚糖C-6伯羟基，对氧化产物分别进行红外光谱、13 C NMR、离子色谱和热失重分析，确定产物结构的变化，并进一步对其抗氧化性进行研究.结果表明，经漆酶-TEMPO 体系氧化后，壳聚糖分子结构中的C-6伯羟基被选择性地氧化成羧基，其它结构基本不变，其产物为氧化壳聚糖钠盐；壳聚糖氧化产物与原样相比，热稳定性得到了提高；壳聚糖经漆酶-TEMPO 体系氧化后的 ABTS 自由基清除率5 min后达到66．36％，抗氧化性能得到改善.
Research adopting laccase-TEMPO system to selectively oxidise the C-6-hydroxyl of chitosan,the FT-IR,13 C NMR,Na+ chromatogram and TGA were used to characterize oxidation products,and further to study its antioxidant capability.Results showed that the C-6-hydroxyl of chitosan were selectively oxidised to carbox-yl,and other basic structure unchanged,the product is sodium salt of oxidised chitosan;compared to the oxida-tion product of chitosan with the original,can improve the thermal stability;after standing for 5 min,the oxi-dation product of chitosan provided an ABTS.+ radical scavenging ability of 66.36%,indicate that antioxidant capability of the oxidation product was improved.
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