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基于凹凸棒土对有机物的良好吸附性能,以凹凸棒土为吸附介质、石蜡为吸附对象,制备有机/无机复合相变材料。由于有机相变材料被吸附到微孔中,使其相变在固定的空间内进行,从而避免了材料在液相状态下的流动和渗漏问题。试验结果显示,坡缕石占80%的凹凸棒土吸附石蜡的最优质量比为2∶1。DSC的测试显示,复合相变材料的焓变值与凹凸棒土和石蜡的吸附比例相关,凹凸棒土中坡缕石的含量越高,凹凸棒土的吸附能力就越强,复合相变材料的焓变值也就越大。温度循环试验的结果显示,复合相变材料具有良好的储(放)热性能,在环境温度上升和下降的过程中,能够储存和释放热量,这不仅增加了环境温度的惰性,也使能量能够在不同的时间和空间进行迁移,从而达到一定的节能效果。
Based on the good adsorption properties of attapulgite for organic compounds, the organic / inorganic composite phase change material is prepared by using attapulgite as the adsorption medium and paraffin as the adsorption target. As the organic phase change material is adsorbed into the pores, the phase transition is performed in a fixed space, thereby avoiding the problem of the flow and leakage of the material in the liquid phase. The experimental results show that the optimal mass ratio of attapulgite adsorbing paraffin to 80% palygorskite is 2: 1. The results of DSC show that the enthalpy change of composite phase change material is related to the adsorption ratio of attapulgite and paraffin, and the higher the content of palygorskite in attapulgite, the stronger the adsorption capacity of attapulgite. The composite phase change material The greater the enthalpy change. The result of the temperature cycle test shows that the composite phase change material has good storage (storage) thermal performance, which can store and release heat during the rise and fall of the ambient temperature, which not only increases the inertness of the ambient temperature but also enables the energy In different time and space for migration, so as to achieve a certain energy-saving effect.