Wang Yuanyuan, Bailey Josh, Zhu Yuan, Zhang Yingrui, Boetcher Sandra K S, Li Yongliang, Wu Chunfei
School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast BT7 1NN, UK.
School of Mechanical and Aerospace Engineering, Queen's University Belfast, Belfast BT7 1NN, UK.
Waste Manag. 2022 Dec;154:96-104. doi: 10.1016/j.wasman.2022.10.003. Epub 2022 Oct 10.
Carbon nanotube (CNT), has been demonstrated as a promising high-value product from thermal chemical conversion of waste plastics and securing new applications is an important prerequisite for large-scale production of CNT from waste-plastic recycling. In this study, CNT, produced from waste plastic through chemical vapor deposition (pCNT), was applied as a nanofiller in phase change material (PCM), affording pCNT-PCM composites. Compared with pure PCM, the addition of 5.0 wt% pCNT rendered the peak melting temperature increase by 1.3 ℃, latent heat retain by 90.7%, and thermal conductivity increase by 104%. The results of morphological analysis and leakage testing confirmed that pCNT has similar PCM encapsulation performance and shape stability to those of commercial CNT. The formation of uniform pCNT cluster networks allowed for a large CNT loading into the PCM on the premise of free phase change, responsible for the high thermal conductivity inside the homogeneous phase. Thus, the resulting capillary forces retained a high latent heat capacity and suitable melting temperature and prohibited PCM leakage from the matrix to the outside during re-melting as the pCNT loading ratio increased. Therefore, the as-prepared pCNT-PCM composite is believed to have similar potential to cCNT and shows prominent performance as a flowable conductive filler for battery thermal management systems.
碳纳米管（CNT）已被证明是废塑料热化学转化产生的一种有前景的高价值产品，确保其新应用是通过废塑料回收大规模生产碳纳米管的重要前提。在本研究中，通过化学气相沉积法由废塑料制备的碳纳米管（pCNT）被用作相变材料（PCM）中的纳米填料，得到了pCNT-PCM复合材料。与纯PCM相比，添加5.0 wt%的pCNT使峰值熔化温度提高了1.3℃，潜热保留率达到90.7%，热导率提高了104%。形态分析和泄漏测试结果证实，pCNT具有与商业碳纳米管相似的PCM封装性能和形状稳定性。均匀的pCNT簇网络的形成使得在自由相变的前提下能够在PCM中大量负载碳纳米管，这是均相内热导率高的原因。因此，随着pCNT负载率的增加，产生的毛细作用力保持了高潜热容量和合适的熔化温度，并在再熔化过程中防止PCM从基体泄漏到外部。所以，所制备的pCNT-PCM复合材料被认为具有与商业碳纳米管（cCNT）相似的潜力，并作为电池热管理系统的可流动导电填料表现出突出的性能。
