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Simultaneous effects of silver-decorated graphite nanoplatelets and anisotropic alignments on improving thermal conductivity of stretchable poly(vinyl alcohol) composite films
Composites Part A: Applied Science and Manufacturing ( IF 8.7 ) Pub Date : 2020-07-16 , DOI: 10.1016/j.compositesa.2020.106045
Taeyong Ha , Dong-Gyun Kim , Jae-Won Ka , Yong Seok Kim , Won-Gun Koh , Ho Sun Lim , Youngjae Yoo

In this study, graphite nanoplatelets (GNPs), known as a thermally conductive and anisotropic carbon material, was used with polyvinyl alcohol (PVA) as matrix, which is a hydrophilic and biodegradable polymer. In order to expect enhanced thermal conductivity, silver nanoparticle-decorated graphite nanoplatelets (Ag-GNPs) were fabricated by adding silver acetate as a precursor using ‘mix-and-heat’ method. Polyvinyl alcohol composite films containing pristine GNPs and Ag-GNPs were prepared using solution casting method. The prepared composite films were uniaxially stretched to induce the filler alignment along the stretching direction as well as the strain-induced crystallization in polymer chains. The effects of the particle size of GNPs, the silver nanoparticle on the surface of GNPs, and the stretching ratios on the thermal conductivity of the composite films were investigated.



中文翻译:

银装饰石墨纳米片和各向异性排列对改善可拉伸聚乙烯醇复合薄膜导热性的同时影响

在这项研究中,石墨纳米片(GNPs)被称为导热和各向异性的碳材料,与聚乙烯醇(PVA)作为基质一起使用,聚乙烯醇(PVA)是一种亲水性和可生物降解的聚合物。为了期望提高的导热性,通过混合加热将醋酸银作为前驱物制备了银纳米颗粒修饰的石墨纳米片(Ag-GNP)。' 方法。采用溶液流延法制备了含有原始GNP和Ag-GNP的聚乙烯醇复合膜。将制备的复合膜单轴拉伸,以诱导填料沿拉伸方向排列以及聚合物链中的应变诱导结晶。研究了GNPs的粒径,GNPs表面的银纳米颗粒以及拉伸比对复合薄膜导热性的影响。

更新日期:2020-07-29
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