生物炭
生物复合材料
聚乙二醇
材料科学
热重分析
热解
差示扫描量热法
复合材料
傅里叶变换红外光谱
热稳定性
化学工程
复合数
热能储存
比表面积
化学
有机化学
生物
热力学
物理
工程类
催化作用
生态学
作者
Shiwang Liu,Shigui Peng,Bingbing Zhang,Bin Xue,Zhao Yang,Sheng Wang,Guomin Xu
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:12 (16): 9587-9598
被引量:19
摘要
The characteristics of biochar are of great significance to its application in the field of phase change energy storage. The objective of this research was to explore the effects of pyrolysis temperature on the characteristics of a biochar matrix and further on the heat energy storage properties of the promising green biochar-supported shape-stable biocomposite PCMs (ss-BCPCMs). Corn straw biochars (CSBCs) obtained under different pyrolysis conditions were loaded with polyethylene glycol (PEG) by an ultrasound-assisted vacuum impregnation method. The micro-morphology, specific surface area, pore structure and surface properties of biochar have been characterized and analyzed by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) method and Fourier transform infrared spectroscopy (FTIR). The thermal properties (chemical stability, latent heat storage, thermal conductivity, thermal stability, and thermal insulation) of PEG/CSBC composites have been characterized by FTIR, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and laser flash analysis (LFA). The study revealed that both pore structure and surface activity of biochar are key factors affecting the energy storage performance of biochar-based ss-BCPCMs. The obtained PEG/CSBC composite showed a high latent heat storage up to 100.2 J g-1, good shape stability and leakage resistance, suggesting its high thermal storage stability that is beneficial for thermal energy storage applications. In addition, its excellent photothermal conversion efficiency (68.95%) provides application potential in photothermal energy storage.
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