干燥过程中稻米玻璃化转变的试验研究

Experimental Study on the Glass Transition of Rough Rice in Drying

利用玻璃化转变理论对稻米的干燥过程进行了试验研究。在干燥过程中 ,稻米会发生玻璃化转变现象。稻米的含水率越高 ,其玻璃化转变温度越低。建立了稻米玻璃化转变温度与其含水率之间的关系方程式 :Tg=77.1- 1.7w。发生玻璃化转变以后 ,稻米胚乳组织的淀粉颗粒变得杂乱无序 ,应力裂纹率明显上升 。

The glass transition theory was applied on the drying of rough rice kernel. A glass transition will occur in the temperature range typically encountered during rough rice drying. The mathematical equation was developed on the glass transition temperature and the moisture content of rough rice kernel. The glass transition theory was used to explain the mechanism of crack formation