抑制共晶产生对低温保存非常重要.本文利用差示扫描量热法研究了加低温保护剂(DMSO、乙二醇、1,2丙二醇、甘油和1,3丁二醇)的NaCl水溶液的共晶行为.得到以5%、10%、15%NaCl水溶液为母液的五种保护剂溶液热流曲线图.研究发现,溶液共晶是过冷、随机过程.低温保护剂有抑制NaCl水溶液共晶的作用.低温保护剂浓度越高,共晶焓越小,对共晶的抑制作用越大.不同种类保护剂的抑制共晶的能力从强到弱依次是甘油、乙二醇、DMSO、1,2丙二醇和1,3丁二醇.升温过程中,溶液发生共晶反玻璃化现象和玻璃化现象.
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