Synthesis and Characterization of Nanoalumina and CNTs-Reinforced Microcapsules with n-Dodecane as a Phase Change Material for Cold Energy Storage

热重分析 材料科学 碳纳米管 差示扫描量热法 热稳定性 化学工程 扫描电子显微镜 热分解 复合材料 化学 有机化学 热力学 物理 工程类
作者
Beibei Dong,Songlin Li,Xinwen Zhang,Jinghang Wang,Hao Peng
出处
期刊:Energy & Fuels [American Chemical Society]
卷期号:34 (6): 7700-7708 被引量:23
标识
DOI:10.1021/acs.energyfuels.0c01381
摘要

A series of microencapsulated phase change materials (MEPCMs) containing nanoalumina-reinforced n-dodecane (C12) as core materials and modified carbon nanotubes (CNTs) reinforced melamine–formaldehyde (MF) resin as shell materials was synthesized successfully via in situ polymerization. The effects of CNTs and nanoalumina on the morphology/thermal performance of the MEPCMs were investigated by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), differential scanning calorimetry (DSC), laser flash analyzer (LFA), and thermogravimetric analysis (TGA). The results indicated that adding CNTs or nanoalumina had little influence on the spherical structure of the MEPCMs, but the supercooling degree of MEPCMs was decreased obviously. The reinforced MEPCMs exhibited excellent thermal durability and distinguished cycling characteristics during the 100th thermal cycling test. It should be noted that the thermal conductivity of MEPCMs was improved distinctly and had a linear growth with the addition of CNTs. In particular, the thermal conductivity of the MEPCMs was improved by 380.8% with the incorporation of 3.3 wt % (0.5 g) CNTs. Furthermore, reinforced MEPCMs presented a superior thermal stability, and its decomposition temperature was increased by about 10 °C than that for MEPCMs without nanoparticles.
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