[ Journal of Materials Science & Technology] Multifunctional HDPE/CNTs/PW composite phase change materials with excellent thermal and electrical conductivities
作者：Xiaolong Li#, Xinxin Sheng#, Yongqiang Guo, Xiang Lu*, Hao Wu, Ying Chen, Li Zhang and Junwei Gu*
關鍵字：thermal conductivity
論文來源：期刊
具體來源：Journal of Materials Science & Technology
發表時間：2021年
AbstractThe risk of leakage and low thermal conductivity severely hinder the wide application of phase change materials (PCMs). In this work, the high-density polyethylene/carbon nanotubes (HDPE/CNTs) porous scaffolds were successfully fabricated via a sacrificial template method followed by the general melt blending and water solvent etching. Subsequently, a series of paraffin wax HDPE/CNTs/PW composite PCMs were obtained combined with the simple vacuum impregnation method. The obtained HDPE/CNTs porous scaffolds can effectively avoid the leakage of PW, meanwhile, the thermal conductivity and electrical conductivity of HDPE/CNTs/PW-3:7 are increased by 2.94 times and 13 orders of magnitude compared with the HDPE/PW-3:7 respectively, also, it exhibits high phase change enthalpy (153.95 J/g for melting enthalpy and 152.82 J/g for crystallization enthalpy). From the above perspectives, the HDPE/CNTs/PW-3:7 has promising potential value in the application of light-to-thermal conversion, electro-to-thermal conversion and thermal energy storage.
泄漏風險和低導熱率嚴重阻礙了有機相變材料的廣泛應用。本研究結合犧牲模板法、熔融共混法和水溶劑蝕刻法成功制備得到高密度聚乙烯（HDPE）/碳納米管（CNTs）多孔骨架。隨后，采用簡單的真空浸漬法制備得到一系列HDPE/CNTs/石蠟（PW）復合相變材料。所得HDPE/CNTs多孔支架可有效避免PW的泄漏，且與HDPE/PW-3:7相比，HDPE/CNTs/PW-3:7的熱導率和電導率分別提高了2.94倍和13個數量級，同時，該復合相變材料還具有較高的相變焓（熔化焓為153.95 J/g，結晶焓為152.82 J/g）。綜上所述，HDPE/CNTs/PW-3:7在光熱轉換、電熱轉換及熱能存儲等領域具有廣闊的應用前景。