盾叶薯蓣的热分析法研究  

Thermal Analysis for Dioscorea zingiberensis Powder

作　　者：陈俊英[1] 刘国际[1] 白净[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450002

出　　处：《安徽农业科学》2013年第4期1423-1424,1478,共3页Journal of Anhui Agricultural Sciences

基　　金：河南省教育厅自然科学基础研究项目(2007530004)

摘　　要：[目的]为了研究盾叶薯蓣在热分析处理时的变化情况。[方法]在氮气气氛下,加热温度从室温30℃到800℃,加热速率为10℃/min,采用热重法(TG)和差示扫描量热法(DSC)研究了盾叶薯蓣粉末、玉米淀粉和棉花纤维素的热性质。[结果]当温度低于100℃时,盾叶薯蓣只是处于失水干燥阶段,在100℃以后出现比较缓慢的失重过程,在280～400℃范围内热解反应比较剧烈,失重最迅速也最大。而后随着温度的逐渐升高,失重速度越来越慢,最终处于一个比较稳定的数值上。黄姜粉最终失重为75%。从室温到100℃,DSC线基本为一水平直线,吸收的热量较少,为干燥阶段。对黄姜粉而言,从100～550℃,放热量一直在递增,DSC曲线的峰值在553℃,之后开始吸热反应,吸热量呈直线上升趋势。[结论]盾叶薯蓣与玉米淀粉和棉花纤维素的变化曲线不同,不能仅仅看作是淀粉和纤维素的加和。[ Objeetive ] To study variation of Dioscorea zingiberensis in thermal analysis treatment. [ Method ] In nitrogen atmosphere, heating temperature from 30 ℃ to 800 ℃, heating rate 10 /min, TG and DSC were used to study thermal properties of Dioscorea zingibensis pow- der, corn starch and cotton cellulose. [ Result] Dioscorea zingiberersis was just in water loss drying stage under 100 ℃, then had a sh,w weight Loss rate over 100 ℃. The weight loss rate increased rapidly and up to the maximum, then dropped quickly in temperature range 280 - 400 ℃. With the temperature increasing, the weight loss rate dropped quickly to a coustant value. The total weight loss reached at 75%. The heat absorption curve was almost a level line under I00 ℃. Exotherm quantity rose quickly from 100 ℃ to 550 ℃. The peak temperature of exotherm was 553 ℃, and then the process became endothermic reaction, endotherm quantity rose quickly. [ Conclusion ] The variation curve of Dioscorea zingiberensis is different wilh corn starch and cotton cellulose.

关 键 词：盾叶薯蓣 热重分析 差示扫描量热分析 

分 类 号：S567[农业科学—中草药栽培]