Thermal Conductivity and Crystallization Behavior of Polyethylene Glycol/Boron Nitride Phase Change Composites

doi:10.11944/j.issn.1000-0518.2020.06.200031

Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (6): 650-657.DOI: 10.11944/j.issn.1000-0518.2020.06.200031

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Thermal Conductivity and Crystallization Behavior of Polyethylene Glycol/Boron Nitride Phase Change Composites

HE Yufang,YAN Pinping,HUANG Baoquan,LUO Fubin(),LI Hongzhou(),QIAN Qingrong,CHEN Qinghua

Polymer Resources Green Recycling Engineering Research Center of the Ministry of Education, College of Environmental Science and Engineering,Fujian Normal University,Fuzhou 350007,China

Received:2020-01-28 Accepted:2020-04-14 Published:2020-06-01 Online:2020-06-08
Contact: LUO Fubin,LI Hongzhou
Supported by:
Supported by the National Natural Science Foundation of China(No.51903049), and the Foundation of Quangang Petrochemical Research Institute, Fujian Normal University(No.2018YJY03)

Abstract

Abstract:

In this paper, polyethylene glycol/boron nitride (PEG/BN) phase change composite was prepared by molten blending method and the influence of the flake size of BN on the thermal conductivity and crystallization behavior of phase change composites was studied. The microstructure, thermal conductivity and phase transition performance of the prepared composites were investigated by scanning electron microscope (SEM), thermal constant analyzer, infrared thermal imaging analyzer and differential scanning calorimeter (DSC). The DSC results of were analyzed by Mo Zhishen method. Results show that larger diameter (50 μm) BN can improve the thermal conductivity of PEG more effectively. When the weight fraction of BN filler content is 40%, the thermal conductivity of phase change composite can reach 5.04 W/(m·K). Under conditions of rapid cooling, BN filler with a diameter of 50 μm can shorten the semi crystallization time and increase the crystallization rate of PEG, and make the phase change composites have a large phase change enthalpy.

Key words: polyethylene glycol, thermal conductivity, nonisothermal crystallization kinetics

HE Yufang, YAN Pinping, HUANG Baoquan, LUO Fubin, LI Hongzhou, QIAN Qingrong, CHEN Qinghua. Thermal Conductivity and Crystallization Behavior of Polyethylene Glycol/Boron Nitride Phase Change Composites[J]. Chinese Journal of Applied Chemistry, 2020, 37(6): 650-657.

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Thermal Conductivity and Crystallization Behavior of Polyethylene Glycol/Boron Nitride Phase Change Composites

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