麦管玻璃化技术的热特性研究

THE THERMAL CHARACTERISTICS RESEARCH OF VITRIFICATION TECHNOLOGY USING STRAW

研究了普通麦管和拉伸麦管在玻璃化保存过程中的降温速率和复温速率 ,结合溶液差示扫描量热曲线进行分析。研究表明采用拉伸麦管可将降温速率由普通麦管的 2 50 0～ 4 70 0K/min提高到 1 1 4 0 0～ 1 84 0 0K/min ;将复温速率由普通麦管的 4 2 0 0～ 6 70 0K/min提高到 1 2 2 0 0～ 32 30 0K/min。某些溶液解冻时的反玻璃化问题更需要重视 ,拉伸麦管的复温速率高于降温速率 ,有利于防止反玻璃化产生。

In this paper we studied the detemperature rate of freezing process and thawing process of vitrification preservation using straw and open pulled straw(OPS).We analyzed the result comparing with differential scanning calorimetry(DSC)curve of vitrification solution.The result is shown that the detemperature rate of freezing process increases from 2 500～4 700 K/min using straw to 11 400～18 400 K/min using OPS and the detemperature rate of thawing process increases from 4 200～6 700 K/min to 12 200～32 300 K/min.In some solution,the devitrification problem during thawing process is more important.The detemperature rate of OPS during thawing process is faster than that during freezing process,which is good for prevent the occurring of devitrification.