中文摘要：

将石蜡（PW）与棕榈酸（PA）熔融超声共混,制备出了一系列PA/PW复合材料。采用瞬态热丝法（SHW, Short-Hot-Wire）测量PA/PW复合材料的导热系数,用差示扫描量热仪（DSC, Differential Scanning Calorimetric）分析复合材料的相变温度（T ）和相变潜热（L）,采用红外光谱仪（FTIR, Fourier Transform Infrared）对复合物的组成进行表征。复合材料的红外吸收光谱图表明, PW和PA只是简单的物理混合,未生成新物质。复合相变材料的导热系数大致随温度的升高而降低,而在30和50？C左右时由于固-固和固-液相变的作用,导热系数测量值出现了一定程度的升高。复合材料的Ts-s（固-固相变温度）都比PW的略高；与纯PW相比,除PA的质量分数w=35%之外,其他比例复合材料的Ts-l （固-液相变温度）都较纯PW的低；除w =35%的Ls-l （固-液相变潜热）比纯PW的低之外,其他比例复合材料的Ls-l都比纯PW的Ls-l高。

英文摘要：

The paraffin wax （PW）/palmitic acid （PA） composites were prepared with ultrasound and stirring. Transientshort-hot-wire method （SHW） was used to measure the thermal conductivity of PA/PW composites. The phase change temperature （T ） and latent heat （L） of the composites were observed by differential scanning calorimetrics （DSC）. Fourier transform infrared （FTIR） was used to characterize the component of the composites. The absorption spectra indicated that there were no new chemical bonds between PA and PW. Results showed that the thermal conductivities of composite phase change materials decreased with the increasing of temperature, except for those at about 30 and 50？C, which near the phase change temperatures. The thermal conductivities showed a certain degree of increase in composites at the temperatures near phase change points. Ts-s （solid-solid phase change temperature） of the composites was slightly higher than that of paraffin wax, while Ts-l （solid-liquid phase transition temperature） of most of the composites were lower, except for w=35%（w is the mass fraction of PA）. PA/PW composites had higher Ls-l than pure PW, except for w=35%.