Chen Wenchao, Chen Qi, Yu Yajie, Gao Huabo, Ma Bin
school of Mechanical Engineering, Qinghai University, Xining, 810016, PR China.
Chempluschem. 2025 Jan;90(1):e202400542. doi: 10.1002/cplu.202400542. Epub 2024 Nov 11.
In this study, ultrafine linear nanostructured SiC with high wettability and large specific surface area were synthesized via the carbothermal reduction method. These nanowires were impregnated with NaSO ⋅ 10HO, CaCl ⋅ 6HO, MgCl ⋅ 6H2O, and CaMgCl ⋅ 12HO to obtain composite phase change materials (CPCMs), which demonstrated improved phase separation and significantly reduced supercooling. In particular, the supercooling degree of CaCl ⋅ 6HO was minimized to 0.1 °C. The SiC nanowires effectively prevented issues of dehydration and deliquescence in hydrated salts. The thermal storage capacities of the CPCMs exceeded 90 %, with NaSO ⋅ 10HO and MgCl ⋅ 6HO reaching 107.10 % and 103.35 %, respectively. Furthermore, the CPCMs exhibited greater sensitivity to changes in temperature compared with the pure hydrated salt phase change materials (PCMs). These results indicate that ultra-fine SiC nanowires can act as a versatile carrier for hydrated salt PCMs at low and intermediate temperatures.
在本研究中，通过碳热还原法合成了具有高润湿性和大比表面积的超细线性纳米结构碳化硅。这些纳米线浸渍有NaSO₄·10H₂O、CaCl₂·6H₂O、MgCl₂·6H₂O和CaMgCl₂·12H₂O，以获得复合相变材料（CPCM），其表现出改善的相分离并显著降低了过冷度。特别是，CaCl₂·6H₂O的过冷度最小化至0.1℃。碳化硅纳米线有效地防止了水合盐中的脱水和潮解问题。CPCM的蓄热能力超过90%，NaSO₄·10H₂O和MgCl₂·6H₂O分别达到107.10%和103.35%。此外，与纯的水合盐相变材料（PCM）相比，CPCM对温度变化表现出更高的敏感性。这些结果表明，超细碳化硅纳米线可作为低温和中温下水合盐PCM的通用载体。
