具有石墨烯纳米片的聚四氟乙烯纳米复合材料的热性能改善

Thermal property improvement of polytetrafluoroethylene nanocomposites with graphene nanoplatelets.

作者信息

Cai Xinzhi, Jiang Zeyi, Zhang Xinru, Gao Ting, Yue Kai, Zhang Xinxin

机构信息

School of Energy and Environmental Engineering, University of Science and Technology Beijing Beijing 100083 China

Beijing Key Laboratory for Energy Saving and Emission Reduction of Metallurgical Industry, University of Science and Technology Beijing Beijing 100083 China.

出版信息

RSC Adv. 2018 Mar 21;8(21):11367-11374. doi: 10.1039/c8ra01047a.

DOI:10.1039/c8ra01047a

PMID:35542818

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9079155/

Abstract

Thermal properties including the crystallization behavior, thermal stability and thermal conductivity for a series of graphene nanoplatelet (GNP)-polytetrafluoroethylene (PTFE) nanocomposites were studied. The GNP-PTFE nanocomposites were fabricated solvent-assisted blending followed by cold-pressing and sintering. The results indicated that the GNP-PTFE nanocomposites retained the good thermal stability of the PTFE matrix, and possessed better crystallization and much higher thermal conductivity than pure PTFE. The thermal conductivity of PTFE nanocomposites with a GNP mass fraction of 20% could reach 4.02 W (m K), which was increased by 1300% compared with pure PTFE. Additionally, a theoretical model was proposed to analyze the thermal conductivity of GNP-PTFE nanocomposites. It is demonstrated that adding GNPs into PTFE homogeneously can effectively improve the thermal properties of the nanocomposites.

摘要

研究了一系列石墨烯纳米片（GNP）-聚四氟乙烯（PTFE）纳米复合材料的热性能，包括结晶行为、热稳定性和热导率。通过溶剂辅助共混，然后冷压和烧结制备了GNP-PTFE纳米复合材料。结果表明，GNP-PTFE纳米复合材料保留了PTFE基体良好的热稳定性，并且具有比纯PTFE更好的结晶性和更高的热导率。GNP质量分数为20%的PTFE纳米复合材料的热导率可达4.02W/（m·K），与纯PTFE相比提高了1300%。此外，还提出了一个理论模型来分析GNP-PTFE纳米复合材料的热导率。结果表明，将GNP均匀添加到PTFE中可以有效改善纳米复合材料的热性能。