干热条件下壳聚糖-木糖的美拉德反应

以木糖为模式还原糖，研究干热条件下壳聚糖与木糖发生美拉德反应的可能性，探讨反应温度、相对湿度、反应时间和壳聚糖/木糖配比4 个因素对美拉德反应的影响，并对在最适条件下获得的美拉德反应产物的热性能和流变学性质进行表征。结果表明，在干热条件下壳聚糖与木糖易于发生美拉德反应，且发生反应的最适条件为将两者按1∶1质量比例混合，在90 ℃及61.2%的相对湿度条件下反应4 h。在此条件下获得的壳聚糖-木糖美拉德反应产物的热分解温度与壳聚糖相比有所降低，流变学研究表明美拉德反应产物在溶液中的弹性明显增强。

Maillard Reaction between Chitosan and Xylose in Dry State

This experiment explored the possibility of the Maillard reaction between chitosan and xylose in the dry heat state
and investigated the effects of reaction temperature, relative humidity, reaction duration, and mixing ratio on the reaction.
Meanwhile, the thermal behavior and rheological properties of the resultant Maillard reaction products were characterized
as well. The results indicated that the Maillard reaction between chitosan and xylose occurred readily in the dry state
and the optimum conditions were determined as follows: chitosan-xylose mixing ratio, 1:1; reaction temperature,
90 ℃; relative humidity, 61.2%; and reaction duration, 4 h. The resultant Maillard reaction products displayed
a reduced thermal degradation temperature compared with chitosan. Rheological measurements revealed greatly
enhanced elastic property in solution.