Study of the thermal properties of polyester composites loaded with oriented carbon nanofibers using the front-face flash method

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• 作者：Nelson W. Pech-May^a ; ^b ; ^{nepem.86@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Caridad Vales-Pinzó ; n^c ; Alejandro Vega-Flick^a ; Á ; ngel Cifuentes^b ; ^d ; Alberto Oleaga^b ; Agustí ; n Salazar^b ; Juan J. Alvarado-Gil^a
• 关键词：Carbon nanofibers ; Polymer-matrix composites ; Thermal transport properties ; Flash method ; Non-destructive testing
• 刊名：Polymer Testing
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：50
• 期：Complete
• 页码：255-261
• 全文大小：977 K

文摘

In this work, we have prepared polyester resin based composites, loaded with carbon nanofibers decorated with magnetite nanoparticles (m-CNF) in several volumetric concentrations covering from 0 to 3.25% and oriented applying a constant magnetic field before polymerization. A study of the heat transfer along the direction of the alignment of the fibers was performed by measuring the in-depth thermal diffusivity and thermal effusivity using the laser flash method in the front-face configuration. For the maximum volumetric concentration of aligned nanofibers along the thickness of the sample, an improvement of 80% of the thermal conductivity above the thermal conductivity of the polyester resin was observed. In contrast, the increment of the thermal conductivity was only of 20% above the value of the matrix for samples with non-oriented carbon nanofibers. The effects of the m-CNF and their orientation on the effective thermal conductivity of the composites were analyzed using a simple theoretical model, which takes into account the thermal mismatch between the matrix and the fillers, as well as the aspect ratio of the embedded fibers.