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Synergistic enhancement of thermal conductivity by addition of graphene nanoplatelets to three‐dimensional boron nitride scaffolds for polyamide 6 composites
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2021-02-10 , DOI: 10.1002/pen.25658
Fangjuan Wu 1, 2, 3 , Anlin Chen 1 , Hanlu Pan 1 , Denghui Li 1 , Lingjie Zhang 1 , Hui Fang 1, 2, 3 , Xiangfang Peng 1 , Elena Bekyarova 2, 3
Affiliation  

Three‐dimensional boron nitride/graphene nanoplatelets (3D‐BN‐GNP) scaffolds were fabricated using an ice‐templating method and polyamide 6 (PA6)‐based composites were prepared by vacuum impregnation of caprolactam monomers into the scaffolds, followed by polymerization. The BN sheets in the PA6/3D‐BN and PA6/3D‐BN‐GNP composites display a predominant parallel alignment along the ice‐crystal formation constructing thermally conductive paths. The addition of few GNPs assists the dispersion of BN sheets in the PA6/3D‐BN‐GNP composites and repair the broken thermal paths caused by local agglomeration of the BN sheets. Consequently, GNPs play a morphology‐promoted synergistic role in the enhancement of the thermal conductivity of the PA6/3D‐BN‐GNP composites. The PA6/3D‐BN‐GNP composite prepared with 23.40 wt% BN sheets and 2.60 wt% GNPs exhibits the highest thermal conductivity of 2.80 W m−1 K−1, which is 833% and 33% higher than the values recorded for the pure PA6 and the PA6/3D‐BN composite at BN loading of 26.18 wt%, respectively. Infrared imaging analysis revealed that the surface of the PA6/3D‐BN‐GNP composite has a fast response to heating and cooling, suggesting the potential of the composites in thermal management applications.

中文翻译:

通过在三维氮化硼支架中添加石墨烯纳米片以增强聚酰胺6复合材料的导热性,从而协同提高导热性

使用冰模板法制造了三维氮化硼/石墨烯纳米片(3D-BN-GNP)支架,并通过将己内酰胺单体真空浸渍到支架中,然后进行聚合制备了聚酰胺6(PA6)基复合材料。PA6 / 3D-BN和PA6 / 3D-BN-GNP复合材料中的BN片材沿冰晶形成主要平行排列,构成导热路径。添加少量GNP有助于BN片材在PA6 / 3D-BN-GNP复合材料中的分散,并修复由BN片材的局部团聚引起的断裂热路径。因此,GNP在增强PA6 / 3D-BN-GNP复合材料的导热性方面起着形态促进的协同作用。PA6 / 3D-BN-GNP复合材料由23.40 wt%的BN片和2。-1 K -1,分别比纯PA6和PA6 / 3D-BN复合材料在BN负载为26.18 wt%时记录的值高833%和33%。红外成像分析表明,PA6 / 3D-BN-GNP复合材料的表面对加热和冷却具有快速响应,这表明该复合材料在热管理应用中的潜力。
更新日期:2021-02-10
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