肉豆蔻酸-硬脂酸/改性粉煤灰复合相变储能材料的制备及性能研究

Study on preparation and properties of myristic-stearic acid/modified fly ash composite phase change energy storage materials

以肉豆蔻酸(MA)和硬脂酸(SA)的二元低共熔混合物为相变储能基材、改性粉煤灰为复合基底,采用熔融混合法制备了MA-SA/改性粉煤灰的复合相变储能材料(CPCM)。利用TG/DTA与FT-IR分析研究了CPCM的热性能与结构。结果表明,MA-SA低共熔物可均匀的嵌入改性粉煤灰的多孔结构中。经过800次的吸放热循环后,CPCM的相变温度和相变焓变化都不大,表现出较好的储热稳定性,有望在储能方面得到实际的应用。

A new type of composite phase change energy storage material was prepared by melt-blending method, using myristic acid （MA）-stearic acid （SA） binary eutectic mixture as the substrate of phase change heat storage materialsand modified fly ash as complex substrates. The structure and heat performance of the composites were respectively characterized by FT-IR and TG/DTA. The results showed that MA-SA can be u-niformly embedded into porous structure of modified fly ash. After 800 cycles of absorption and rejection heat, the phase change temperatures and enthalpy of the composites had little change. Furthermore,the composites had good heat storage stability, showing good practical application in energy storage.