摘要
利用差示扫描量热仪研究了乙二醇、丙三醇、1,3丙二醇、1,3丁二醇和2,3丁二醇水溶液的过冷行为和水合性质,得出了这些性质与线性多元醇溶液浓度的关系.研究发现,在低浓度过冷度与浓度之间没有明显关系;而在中高浓度则具有相似的变化规律,即随着溶液浓度增大而增大.各低温保护剂在水合性质上所表现出的差异性,体现了保护剂的官能团(羟基、甲基)所起到的重要作用.
A differential scanning calorimeter was used to study the thermal behaviors of polyalcohols aqueous solutions, such as supercooling degree of heterogeneous nucleating temperature, hydration properties. The experimental results show that the variation of supercooling and hydration behavior does not have obvious rules at the low concentrations. However, the supercooling degree and the content of unfrozen water increased with the solution concentration at the high concentrations. The difference of hydration properties shows the important effects of function groups （methyl groups and hydroxyl groups）.
基金
ProjectsupportedbytheNationalNaturalScienceFoundationofChina(50376040
50206013)
FoundationofShanghaiMunicipalEducationCommissionandyouthprojectofShanghaiMunicipalEducationCommission(02GQ25).
关键词
线性多元醇
低温保护剂
差示扫描量热法
过冷度
水合性质
Polyalcohols, Cryoprotectants, Differential scanning calorimetry, Supercooling, Hydration
