十八烷/膨胀石墨定形相变材料的制备与性能.

Aiming at the application of energy-saving and energy storage materials for buildings, a series of octadecane/intumescent graphite forming phase change materials with different octadecane content were prepared by vacuum adsorption method, and the optimal content of octadecane adsorption and its properties were explored through microscopic morphological observation, leakage performance test, differential scanning calorimetry analysis and cold-thermal cycle stability analysis. Through the analysis, it is concluded that when the adsorption amount of octadecane is 90 wt%, the comprehensive performance of the octadecane/expanded graphite forming phase change material under the adsorption content is the best, and its enthalpy of molten enthalpy and solidification enthalpy are 188 J/g and 186.9 J/g, which has a higher enthalpy values compared with different composite phase change materials at home and abroad. After heating the oven at 50 ℃ for 2 h, there is no obvious phenomenon of octadecane exudation, and the quality loss rate is less than 1%, indicating that it has good anti-leakage performance and structural stability. [ABSTRACT FROM AUTHOR]