纳米低温保护剂玻璃化过程中热学性质的研究  

Thermal Properties of Nano-cryoprotectant Solutions during Vitrification Examination

作　　者：徐海峰[1] 郝保同[1] 刘连军[1] 唐临利[1] 刘宝林[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：《制冷技术》2012年第4期8-11,共4页Chinese Journal of Refrigeration Technology

基　　金：国家自然科学基金(NO.51076108);教育部新世纪优秀人才计划(07-0559);上海市东方学者计划

摘　　要：本文利用差示扫描量热仪(DSC)对含有羟基磷灰石(HA)纳米颗粒的丙三醇溶液玻璃化过程中的主要热学性质进行了测定。其中包括玻璃化与反玻璃化温度的测定,玻璃化过程中比热的测定。结果表明加入HA纳米颗粒后的丙三醇溶液的反玻璃化温度(Td)表现出明显的上升趋势,当溶液浓度高于50%时玻璃化温度(Tg)也稍有升高;加入纳米颗粒后溶液在整个玻璃化过程中比热明显减小,并且减小程度与HA颗粒浓度及粒径大小均表现出一定的非线性关系。The differential scanning caborimetry(DSC) was used to measure the vitrification temperature, devitrification temperature and the specific heat of the glycerol solutions with/without nanoparticiles in the paper. The result shows that,the devitrification temperature(T_d) of the glycerol solutions with nanoparticiles rises significantly;when the solution concentration is more than 50%,vitrification temperature(T_g) has a little rising tendency;the specific heat was reduced by nanoparticles during the whole vitrification process,and the reduction shows nonlinear relationships with nanoparticle concentration and size.

关 键 词：纳米颗粒 玻璃化 反玻璃化 比热 差示扫描量热仪 

分 类 号：Q-33[生物学] TB383.1[一般工业技术—材料科学与工程]