纳米低温保护剂水合及玻璃化性质的DSC研究  

HYDRATION AND VITRIFICATION PROPERTIES OF Nano-CRYOPROTECTANT SOLUTIONS EXAMINED WITH DSC

作　　者：徐海峰[1] 刘宝林[1] 郝保同[1] 周国燕[1] 

机构地区：[1]上海理工大学生物系统热科学研究所,上海200093

出　　处：《低温物理学报》2011年第6期458-462,共5页Low Temperature Physical Letters

基　　金：国家自然科学基金(批准号:50776060);教育部新世纪优秀人才计划(批准号:07-0559);上海市东方学者计划(批准号:S30503)资助的课题~~

摘　　要：利用差示扫描量热仪(DSC)研究了羟基磷灰石(HA)纳米微粒对丙三醇溶液冻结过程中水合性质及玻璃化性质的影响.实验结果表明在中高浓度HA纳米颗粒对溶液水合性质影响显著.与未加纳米颗粒的溶液相比,溶液结晶量减少,未冻水含量增大.在较低浓度溶液中,加入纳米颗粒后玻璃化温度变化不明显,但反玻璃化温度明显升高;当溶液浓度达到60%,加入纳米颗粒后玻璃化温度才有明显的升高趋势,并且玻璃化温度与熔融温度的间距缩短幅度很大.种种结果表明纳米颗粒对实现低温保护剂溶液玻璃化是有利的.In order to investigate the effects of nanoparticles（HA） on the vitrification properties of cryprotectant solutions at cryogenic temperatures, the hydration properties, vitrification and devitrification of Glycerol aqueous solutions with different sizes and concentrations of HA nanoparticles were employed by differential scanning calorimeter （DSC）. Experimental results indicate that the hydration behaviors can be significantly affected by nanoparticles. Compared with other solutions without nanoparticles the crystallization quantity reduce, unfrozen water increase. At low concentrations glass transition temperature change smoothly after adding nanoparticles, but devitrification tem- perature evidently rise. When concentrations arrive to 60 %, vitrification temperatures rise significantly and the distance between vitrification temperature and melting temperature reduced largely. All of them show that nanoparticles is benefit for realizing virification of cryoproteetant solutions.

关 键 词：纳米颗粒 水合性质 结晶量 玻璃化 反玻璃化 DSC 

分 类 号：TB383.1[一般工业技术—材料科学与工程]