Mineral Sepiolite Energy-saving Residential Materials

Mineral sepiolite as inorganic carrier, lauric acid(LA)-stearic acid(SA)as binary PCM(phase change material), CTAB as modifier, ethanol as solvent, mineral energy storage residential composite was prepared by intercalation, and the properties of composites were characterized using thermogravimetry(TG)/differential thermal analysis(DTA),scanning electron microscope(SEM),X-ray diffraction(XRD).Orthogo-nal experimental results show that the optimum proportion of composite materials is A(3)B(2)C(1)D(3), the initial phase change temperature is 31.44 degrees C, phase transition peak temperature is 35.25 degrees C, a wide range of endothermic peak is between 30.0 similar to 40.0 degrees C, scope of phase change temperature is 3.81. LA-SA eutectic mixture could be retained by adding into 42.3 wt% porous sepiolite, treated at 80 degrees C. The weight loss of the composites is no more than 2% when melting/freezing cycling within 100 degrees C, so it has good thermal reliability when applied to building material. Mainly due to relatively high content of mineral impurity, high temperature and CTAB can significantly help improve adsorption rate of mineral sepiolite. Sepiolite as a carrier material has features with low cost, broad sources, non-toxic and non-pollution. The composite material is a healthy residential energy-saving material, and it provides a good prospect for the realization of building energy efficiency, regulating room temperature in summer, and improving human comfort.