以肉豆蔻酸(MA)、棕榈酸(PA)和石蜡(PS)为原料,采用熔融共混法制备了MA-PA-PS(MPP)三元复合相变材料,并对其进行性能表征。结果表明:MPP中MA、PA与PS的最佳质量配比为42∶20∶38,MPP的相变温度与相变潜热分别为40.63℃与177.27J/g;MPP中各组分是通过物理作用结合,并未发生化学反应;MPP具有良好的储热性能;MPP在温度不高于144.54℃时不发生分解,具有较好的热可靠性;在经历500次冷热循环后,MPP相变温度与相变潜热的最大偏差均小于10%,具有良好的热稳定性与化学结构稳定性。因此,MPP在建筑节能领域具有较好的应用前景。
In this study,a ternary composite phase change material MA-PA-PS (MPP) was prepared by melt blending method from myristic acid (MA),palmitic acid (PA) and paraffin wax (PS),and its properties were characterized.The results showed that the optimal mass ratio of MA,PA and PS in MPP was 42∶20∶38,and the phase change temperature and latent heat of MPP were 40.63℃ and 177.27J/g,respectively.The components in MPP were combined by physical interactions without chemical reactions.MPP had good thermal storage performance and did not decompose when the ambient temperature was below 144.54℃,demonstrating good thermal reliability.After 500 cooling and heating cycles,the maximum deviation of phase change temperature and latent heat of MPP was less than 10%,indicating excellent thermal stability and chemical structural stability.So MPP has a good prospect of application in the field of building energy conservation.
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基金资助
国家自然科学基金(51966004);江西省自然科学基金项目(20212BAB204029);江西理工大学清江青年优秀人才项目(JXUSTQJYX2017003)
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