石蜡/不同粒径膨胀石墨复合相变储热材料的制备和性能

doi:10.11901/1005.3093.2014.148

材料研究学报

2015, Vol. 29

Issue (4): 262-268 DOI: 10.11901/1005.3093.2014.148

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石蜡/不同粒径膨胀石墨复合相变储热材料的制备和性能

田云峰,李珍(

),王洋,曾萍,姜凌艺

中国地质大学材料与化学学院武汉 430074

Preparation and Performance of a Phase Change Heat Storage Composite of Paraffin/Different Particle Sized Expanded Graphite

Yunfeng TIAN,Zhen LI(

),Yang WANG,Ping ZENG,Lingyi JIANG

Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, China

引用本文:

田云峰,李珍,王洋,曾萍,姜凌艺. 石蜡/不同粒径膨胀石墨复合相变储热材料的制备和性能[J]. 材料研究学报, 2015, 29(4): 262-268.
Yunfeng TIAN, Zhen LI, Yang WANG, Ping ZENG, Lingyi JIANG. Preparation and Performance of a Phase Change Heat Storage Composite of Paraffin/Different Particle Sized Expanded Graphite[J]. Chinese Journal of Materials Research, 2015, 29(4): 262-268.

全文: PDF(3057 KB) HTML

摘要:

用熔融共混法制备石蜡/不同粒径膨胀石墨复合相变储热材料, 对样品进行XRD、FT-IR、SEM、DSC和LFA表征分析, 研究了不同粒径膨胀石墨的质量比例对复合相变储热材料性能的影响。结果表明: 随着小粒径膨胀石墨含量的增加, 复合相变储热材料的热扩散系数先增大后减小。在大小粒径膨胀石墨质量比例为9∶1时, 石蜡充分利用了大小粒径膨胀石墨的镶嵌式空间结构, 复合相变材料的热扩散系数为1.964×10^-6 m²/s, 比纯石蜡提高了22倍, 相变潜热为144.2 J/g。

关键词 ：复合材料, 大小粒径膨胀石墨, 石蜡, 镶嵌结构, 相变储热材料

Abstract：

As phase change heat storage material (PCM), composites of paraffin/expanded graphite of different particle sizes (DPS-EG) were prepared by melt blending method, which were then characterized by means of XRD, FT-IR, SEM, DSC and LFA. The effect of mass fraction of DPS-EG on performance of the composite PCM was studied. Results show that the thermal diffusivity of the composite PCM increased first and then decreased with the increasing mass fraction of small particle sized EG. When the ratio of mass fraction for large sized ones to the small ones of the DPS-EG was 9:1, paraffin may be allowed to fill fully into the free space of the mosaic structure of DPS-EG. The thermal diffusivity of the composite PCM was up to 1.964×10^-6 m²/s, 22 times higher than that of pure paraffin, while its latent heat was 144.2 J/g.

Key words： composite materials expanded graphite with different particle sizes paraffin mosaic structure phase change heat storage material

收稿日期: 2014-03-31

基金资助:* 全国大学生创新创业训练项目201310491014资助。

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https://www.cjmr.org/CN/10.11901/1005.3093.2014.148 或 https://www.cjmr.org/CN/Y2015/V29/I4/262

图1 制备EG/石蜡复合相变储热材料流程示意图

表1 大粒径膨胀石墨与小粒径膨胀石墨比例

图2 两种EG的XRD谱

图3 两种EG的SEM像

图4 EG、石蜡和复合相变储热材料的XRD谱

图5 石蜡、EG和复合相变储热材料的红外光谱

图6 复合相变储热材料的SEM像

图7 复合相变储热材料的吸附性能

图8 石蜡和复合相变储热材料的热扩散率

图9 石蜡和复合相变储热材料的DSC曲线

表2 石蜡和复合相变储热材料的相变潜热和相变温度

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