A new kind of shape-stabilized PCMs with positive temperature coefficient (PTC) effect
A new kind of shape-stabilized PCMs with positive temperature coefficient (PTC) effect
复制标题
一种具有正温度系数（PTC）效应的新型形状稳定相变材料
DOI：
10.1016/j.enconman.2013.12.053
复制
发表时间：
2014-03
影响因子：
10.4
通讯作者：
Liu Na
中科院分区：
文献类型：
--
作者：
Cheng Wen-long;Wu Wan-fan;Song Jia-liang;Liu Yi;Yuan Shuai;Liu Na
制备了一种具有正温度系数效应的形状稳定相变材料（PCMs）。通过在石蜡/低密度聚乙烯（LDPE）复合材料中加入石墨粉（GP）制备了该材料，并通过调整材料的组分比例获得了PTC特性。然后研究了材料的物理结构和热性能，并实验研究了不同GP质量分数和石蜡/LDPE质量比对材料PTC行为的影响。结果表明，材料的转换温度约为25℃（室温），接近石蜡分散在材料中的第一相变温度。当GP质量分数和LDPE/石蜡质量比分别为40 wt%和30 wt%时，材料的PTC性能最佳。此外，通过热处理可以有效地消除材料的负温度系数效应。这种新型材料不同于以往PTC材料的开关温度集中在高温范围。它弥补了以往材料开关温度只能在高温而不能在室温下工作的缺陷，为电子器件的热控制或其他室温热控制应用提供了一种潜在的手段。
A new kind of shape-stabilized phase change materials (PCMs) with positive temperature coefficient (PTC) effect was prepared in this paper. The materials were prepared by adding graphite powder (GP) to the paraffin/low density polyethylene (LDPE) composite and the PTC characteristic was found by adjusting the component ratio of the material. Then the physical structures and thermal properties of the materials were investigated and the effect of various GP mass fractions and paraffin/LDPE mass proportions on the PTC behavior of the materials was studied experimentally. The results showed that the switching temperature of the materials was about 25 °C (room temperature) which approached to the first phase change temperature of paraffin dispersed in the materials. The PTC behavior of the materials was the best when the GP mass fraction and the mass proportion of LDPE/paraffin were 40 wt% and 30:70, respectively. Furthermore, the negative temperature coefficient (NTC) effect of the materials could be eliminated effectively with heat treatment. This new kind of materials is different from the former PTC materials which the switching temperatures focus on high temperature ranges. It makes up for the defect of previous materials that the switching temperatures only range in high temperature rather than room temperature and provides a potential means for the thermal control of the electronic devices or other room temperature thermal control applications.
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DOI：
--
发表时间：
2003
期刊：
Polymeric materials science and engineering
影响因子：
--
作者：
Li Rong
通讯作者：
Li Rong
影响因子：
4.1
作者：
S. R. Syrtsov;V. Shut;I. F. Kashevich;A. S. Sedlovsky;B. Watts
通讯作者：
S. R. Syrtsov;V. Shut;I. F. Kashevich;A. S. Sedlovsky;B. Watts
影响因子：
5.7
作者：
Kathleen Kirstein;K. Reichmann;W. Preis;S. Mitsche
通讯作者：
Kathleen Kirstein;K. Reichmann;W. Preis;S. Mitsche
影响因子：
5.7
作者：
Zeming He;J. Ma;Y. Qu;Chenggang Wang
通讯作者：
Zeming He;J. Ma;Y. Qu;Chenggang Wang
影响因子：
6.9
作者：
Cheng, Wen-long;Zhang, Rong-ming;Wang, Jun
通讯作者：
Wang, Jun