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首页> 外文期刊>RSC Advances >Effect of γ-PVDF on enhanced thermal conductivity and dielectric property of Fe-rGO incorporated PVDF based flexible nanocomposite film for efficient thermal management and energy storage applications
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Effect of γ-PVDF on enhanced thermal conductivity and dielectric property of Fe-rGO incorporated PVDF based flexible nanocomposite film for efficient thermal management and energy storage applications

机译：γ-PVDF对Fe-RGO掺入的柔性纳米复合膜的增强导热性和介电性能的影响，实现高效热管理和能量存储应用

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摘要

Here, we investigate the effect of thermal conductivity of γ-crystallites of PVDF in Fe-rGO/PVDF nanocomposite, which are of potential use as actuators and temperature sensors for thermal management applications. The formation of γ-crystallites help to increase the thermal conductivity of the nanocomposite up to 0.89 W mK ~(?1) at low level of filler loading (3 wt%) and we showed that the thermal conductivity depends on the amount of crystalline polar γ-phase in addition to filler concentration. Although thermal conductivity depends on the crystallinity of the nanocomposite, here enhancement of thermal conductivity is not related only to crystallinity, as the crystallinity is decreased compared to neat PVDF. However the thermal conductivity increases because of the generation of a higher number of γ-crystallites of small size. Furthermore, the nanocomposite at low filler loading also shows high dielectric constant with low dielectric loss of the order of ≈57 and ≈0.13, respectively, at 1 kHz. Moreover, the energy storage property and its dependence on γ-crystallite size reveals that the material can also exhibit superior released energy density (1.45 J cm ~(?3) ) as compared to pure PVDF.
机译：在这里，我们研究了PVDF在Fe-RGO / PVDF纳米复合材料中的γ晶体热导电性的影响，这与用于热管理应用的致动器和温度传感器的潜在用途。 γ-微晶的形成有助于在低水平的填料载荷（3wt％）下将纳米复合材料的导热率增加至0.89W mk〜（α1），并且我们表明导热率取决于晶体极性的量γ相除填料浓度之外。尽管导热率取决于纳米复合材料的结晶度，但是，由于与整齐的PVDF相比，结晶度降低，导热性的增强不相关。然而，由于产生较高数量的小尺寸的γ晶体，导热率增加。此外，低填料负载下的纳米复合材料还示出了具有在1kHz的低介电损耗的高介电常数，其≈57和≈0.13分别为1kHz。此外，与纯PVDF相比，能量储存性能及其对γ-微晶尺寸的依赖性显示，该材料也可以表现出优异的释放能量密度（1.45JCm〜（α3））。

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