Impact of carbon nanotubes addition on electrical, thermal, morphological, and tensile properties of poly (ethylene terephthalate)
Impact of carbon nanotubes addition on electrical, thermal, morphological, and tensile properties of poly (ethylene terephthalate)
复制标题
DOI：
10.1007/s13203-016-0161-2
复制
发表时间：
2016-09-01
影响因子：
--
通讯作者：
Wilkinson, Arthur
中科院分区：
文献类型：
--
作者：
Alshammari, Basheer A.;Wilkinson, Arthur
在这项研究中，多壁碳纳米管 (MWCNT) 以原样 (A-MWCNT) 和处理过的 (T-MWCNT) 形式并入聚对苯二甲酸乙二醇酯 (PET) 基质中。采用熔融复合法制备这些碳纳米管（CNT）增强PET复合材料。研究了导电性、热稳定性、形态和拉伸性能。为了进行测试和表征，使用了阻抗谱、热重分析、扫描电子显微镜、透射电子显微镜、傅里叶变换红外光谱和拉伸测试。结果表明，掺入了类似于 0.25 wt% A-MWCNT 的导电聚合物纳米复合材料（类似于 0.2 S/m），形成了低渗滤阈值（类似于 0.33 wt%）。相比之下，在相同的 T-MWCNT 负载量下，甚至增加 2 wt% 时，都不会产生导电聚合物。据推测，这种行为归因于酸处理破坏了碳纳米管固有的导电性并降低了它们的长宽比。尽管如此，T-MWCNT 在 PET 基质中表现出比 A-MWCNT 更好的分散性和分布性。此外，与 A-MWCNT 对应物相比，掺入 T-MWCNT 的复合材料的拉伸行为得到改善。在空气和氮气气氛中，PET/A-MWCNT 的热稳定性均得到改善。而 PET/T-MWCNT 在氮气气氛中的所有样品中表现出最高的热稳定性。然而，在空气气氛中，热响应较差。
In this study, multi-walled carbon nanotubes (MWCNTs) were incorporated into poly (ethylene terephthalate) (PET) matrix in their as-received (A-MWCNTs) and treated (T-MWCNTs) forms. Melt-compounding method was used for the preparation of these carbon nanotubes (CNTs)-reinforced PET composites. The electrical conductivity, thermal stability, morphological, and tensile properties were investigated. For testing and characterization, impedance spectroscopy, thermo-gravimetric analysis, scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy and tensile testing were utilized. The results demonstrates that an incorporation of similar to 0.25 wt% A-MWCNTs, an electrically conductive polymer nanocomposite (similar to 0.2 S/m), was formed with a low percolation threshold (similar to 0.33 wt%). In contrast, at the same loading of T-MWCNTs or even up 2 wt% did not yield conductive polymer. Presumably, such behavior is attributed to the acid treatment that disrupted the inherent electrical conductivity of the CNTs and also reduced their aspect ratio. Nevertheless, T-MWCNTs showed a better dispersion and distribution into the PET matrix than that of A-MWCNTs counterpart. Moreover, an improved tensile behavior was observed for T-MWCNTs incorporated composites than that of A-MWCNTs counterpart. Improved thermal stability was observed for PET/A-MWCNTs in both the air and nitrogen atmospheres. Whereas, PET/T-MWCNTs exhibited the highest thermal stability in all samples in nitrogen atmosphere. However, poor thermal response was seen in air atmosphere.