| HA纳米微粒对PEG-600低温保护剂反玻璃化结晶的影响 |
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| 引用本文： | 吕福扣,刘宝林,李维杰.HA纳米微粒对PEG-600低温保护剂反玻璃化结晶的影响[J].低温物理学报,2012(4):315-320. |
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| 作者姓名： | 吕福扣 刘宝林 李维杰 |
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| 作者单位： | 上海理工大学生物热科学研究所 |
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| 基金项目： | 国家自然科学基金(批准号:51076108);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资助课题~~ |
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| 摘 要： | 为了研究羟基磷灰石HA纳米微粒对低温保护剂反玻璃化结晶的影响,本文利用DSC和低温显微镜研究了含有不同粒径(20nm、40nm、60nm)和不同质量浓度(0.1%、0.2%、0.4%、0.8%)HA纳米微粒的PEG-600(50%,w/w)溶液反玻璃化过程中的结晶现象.试验结果表明:与未添加纳米微粒的PEG-600溶液相比,加入40nm、0.4%纳米微粒的HA-PEG600溶液的反玻璃化温度升高了7℃;加入20nm、0.4%和40nm、0.8%纳米微粒的HA-PEG600溶液的冰晶生长速率分别降低了35%和提高了50%;纳米低温保护剂溶液的冰晶形貌从大圆形变成了小圆形、枝晶或小圆形中夹带枝晶.
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| 关 键 词： | DSC 低温显微镜 反玻璃化温度 冰晶生长速率 冰晶形貌 |
EFFECTS OF HA NANOPARTICLES ON DEVITRIFICATION CRYSTALLIZATION OF PEG-600 CRYOPROTECTANTS |
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| LV Fu-kou,LIU Bao-lin,LI Wei-jie.EFFECTS OF HA NANOPARTICLES ON DEVITRIFICATION CRYSTALLIZATION OF PEG-600 CRYOPROTECTANTS[J].Chinese Journal of Low Temperature Physics,2012(4):315-320. |
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| Authors: | LV Fu-kou LIU Bao-lin LI Wei-jie |
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| Institution: | Institute of Biothermal and Technology,University of Shanghai for Science and technology,shanghai 200093 |
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| Abstract: | To study the effects of HA nanoparticles on devitrification of cryoprotectant solutions,The crystallization of PEG-600(50%)solutions with HA nanoparticles of different particle size(20nm、40nm、60nm)and concentrations(0.1%、0.2%、0.4%、0.8%)were observed under a cryomicroscope,and vitrification parameters were measured by DSC.Experimental results showed that devitrification temperature of PEG-600 solution containing 0.4% HA with the particle size of 40nm increased by 7℃,the growth rate of ice crystal of PEG-600 solution containing 0.4% HA with the particle size of 20nm and 0.8% HA with the particle size of 40nm decreased by 35% and increased by 50% respectively.The structure of ice crystal in PEG-600 solution with HA changed remarkably. |
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| Keywords: | DSC cryomicroscope devitrification temperature growth rate structure |
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