活性炭/有机质复合相变材料的热-电性能

用活性炭(AC)作为支撑材料,石蜡(PW)、十六酸(PA)和硬脂酸(SA)作为相变主材,通过熔融共混法制备AC/PW、AC/PA和AC/SA复合相变材料,并考察了其热-电性能。结果表明,添加活性炭时有机质均不会泄漏;复合材料充-放热过程中温度场分布都比较均匀,热循环会使材料导热性能略有下降;此外,三种复合材料的电阻率均随压力增加而减小。

Thermo-Physical and Electrical Properties of Activated Carbon/Organic Matter Composite Phase Change Materials

Composite phase change material AC/PW, AC/PA and AC/SA were prepared by melt blending using activated carbon (AC) as supporting material and paraffin (PW), palmitic acid (PA) and stearic acid (SA) as main phase change materials, and their thermal and electrical properties were studied by infrared thermal imager, thermal conduction coefficient and powder semi-conductor resistance tester. The results showed that organic matter will not leak when activated carbon is added, and the temperature field distribution during the charging and exothermic process of the composite is relatively uniform. Thermal cycling will slightly reduce the thermal conductivity of the material. In addition, the electrical resistivity of the three composite materials decreases with the increase of pressure.