| 摘要: |
| 为了研究纳米微粒对低温保护剂热力学性质的影响，实验利用差示扫描量热仪(DSC)测量了加入羟基磷灰石(HA)纳米微粒的丙三醇低温保护剂溶液(浓度为50%)比热容的值。实验结果表明：当加入HA纳米微粒质量分数为0.1%时，其溶液的比热容的值有略微的下降。但是当加入的纳米微粒质量分数提高到0.5%时，溶液的比热容的值发生了比较明显的下降。因为比热容与热扩散系数成反比，所以小的比热容能提高降温速率。针对实验中的比热容的变化，作者尝试做出了一些理论解释。 |
| 关键词: 工程热物理 DSC 比热容 纳米微粒 低温保护剂 |
| DOI： |
| 投稿时间：2011-09-26
|
| 基金项目:国家自然科学基金（51076108）资助项目。 |
|
| Effects of Nanoparticles on Specific Heat of Cryoprotectant Solutions |
|
Liu Lianjun, Xu Haifeng, Hao Baotong, Tang Linli, Liu Baolin
|
| (Institute of Biothermal Science, University of Shanghai for Science and Technology) |
| Abstract: |
| To study the effects of the nanoparticles on thermodynamic parameter of cryoprotectant solutions, the specific heat of the glycerol solutions (50% v/v) with/without nanoparticiles (HA) was measured by using DSC. The results show that specific heat of the glycerol solutions has decreased slightly, when the mass fraction of nanoparticles is 0.1%. While specific heat of the glycerol solutions has decreased obviously, when the mass fraction of nanoparticles is 0.5%. Because the specific heat is inverse to the thermal diffusivity, the less the specific heat is, the farther the cooling rate is. This paper provides a theoretical explanation about it. |
| Key words: engineering thermophysics dsc specific heat nanoparticles cryoprotectant solutions |
