有机化学 ›› 2003, Vol. 23 ›› Issue (10): 1149-1151. 上一篇    下一篇

研究论文

鲍鱼多糖Hal-A的热分析研究

佘志刚;胡谷平;郭志勇;林永成;林木良   

  1. 中山大学化学与化学工程学院;中山大学测试中心
  • 发布日期:2003-10-25

Study on the Thermal Decomposition of the Sulphated Polysaccharide Hal-A from Haliotis diverisicolor Reeve

She Zhigang;Hu Guping;Guo Zhiyong;Lin Yongcheng;Lin Muliang   

  1. School of Chemistry and Chemical Engineering, Zhongshan University;Test Centre, Zhongshan University
  • Published:2003-10-25

采用热重、热重-红外谱联用及差示扫描量热法,对鲍鱼多糖进行热分析研究 ,结果表明鲍鱼多糖在空气和氮气氛中,230 ~ 340 ℃之间发生剧烈的分解反应 。氮气氛中,是吸热的分解过程;而空气氛中,是放热氧化反应,并且在453 ℃左 右,有另一个急剧的氧化裂解过程。与淀粉、肝素、甲壳素和半乳糖的热分析比较 ,含有硫酸酯的鲍鱼多糖和肝素热稳定性较低,含氨基的甲壳素最高,这反映出不 同基团对多糖热稳定性的影响。

关键词: 鲍鱼, 多糖, 热重量分析, 示差扫描量热法, 热稳定性

The thermal decomposition of the sulphated polysacchaiide Hal-A from Haliotis diverisicolor Reeve has been studied by using thermogravimetry (TG), thennogravimetry-infrai-ed (TG-IR), differential thermogravimetry (DTG) and differential scanning calorimetry (DSC) in air and N_2. The results indicate that Hal-A is rapidly degraded at 276 ℃ (air) and 281 ℃ (N_2), respectively. It is exothermic in the air atmosphere and endothermic in the N_2 atmosphere. Comparing with chitin and starch, the thermal stability of the sulphated polysaccharide Hal-A and heparin is lower. The results of TG- IR analysis demonstrate that Hal-A is decomposed into CO_2, H_2O, alcohols, oxo-compounds etc and remains mainly contain Na_2SO_4 and carbon.

Key words: sulphated, POLYSACCHARIDE, TG, DSC, THERMAL STABILITY

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