正癸酸/膨胀珍珠岩复合相变水泥板导热系数研究

关键字：正癸,酸,膨胀,珍珠,岩,复合,相变,水泥板,导热,

（辽宁工业大学 土木建筑学院，辽宁 锦州  121001）

 
    摘要：通过真空吸附法，以膨胀珍珠岩（EP）为多孔基体材料，正癸酸（CA）为相变材料，将水泥砂浆与正癸酸/膨胀珍珠岩相变材料混合，制备了正癸酸/膨胀珍珠岩复合相变水泥板，研究了温度、复合相变材料含量等对导热系数的影响。结果表明：相同温度条件下，复合相变材料含量越高，复合相变水泥板的导热系数越低；与普通水泥板相比，复合相变材料含量为8%、13%、18%的水泥板导热系数分别降了40.60%、49.59%、53.43%（21 ℃）和39.16%、47.89%、51.61%（51 ℃）。
    关键词：复合相变材料；水泥板；导热系数；热流密度
    中图分类号：TU55+1.34        文献标识码：A        文章编号：1001-702X（2017）12-0008-04

Study on the thermal conductivity of the n-decanoic acid/expanded perlite composite phase change cement board
YU Ge
（School of Civil Engineering and Architecture，Liaoning University of Technology，Jinzhou 121001，China）

    Abstract：The n-decanoic acid/expanded perlite composite phase change cement board was mixed with n-decanoic acid/expanded perlite phase change material by vacuum adsorption method with expanded perlite（EP） as the porous matrix material and n-decanoic acid（CA） as phase change material. The effect of temperature and content of phase change material on thermal conductivity was researched. The results show that the higher the phase change material content is，the lower the thermal conductivity of the cement board is under the same temperature condition. Compared with the thermal conductivity of ordinary cement board，the thermal conductivity of 8%，13% and 18% composite phase change cement slabs decreased by 40.60%，49.59%，53.43%（21 ℃）and 39.16%，47.89%，51.61%（51 ℃）.
    Key words：composite phase change material，cement board，thermal conductivity，heat flux density