中文摘要：

以甘露醇为母体,利用熔融共混法制备甘露醇/SiO2复合相变材料。采用SEM、FT-IR、XRD、DSC和TDC等对复合相变材料的结构和热性能进行了表征。实验结果表明,甘露醇和支撑体二氧化硅之间仅存在氢键作用,没有其他化学作用;通过对质量比m(SiO2)/m(mannitol)=2(S/M-2)复合材料循环测试实验表明,其具有良好的稳定性,S/M-2材料与甘露醇热扩散系数测试结果表明,在40±C固态时复合相变材料的热扩散系数提高了近8倍;在相变温度以上,200±C时热扩散系数也提高了20%。

英文摘要：

A series of mannitol/SiO2(S/M)phase change composite were prepared using mannitol as a matrix by the melt blending method.The structure and thermal properties of S/M composites characterized by SEM,FT-IR,XRD,DSC and TDC.The results showed that it was contacted only by hydrogen bonding and there was no other chemistry bond between mannitol and SiO2.The circle test of S/M-2indicated its best stability and the results of the thermal conductivity of S/M-2illustrated that it enhanced8times at40±C and increased by20%at200±C beyond its phase change temperature.