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二元低共熔相变石蜡的制备及热性能研究
作者：孟多，王安琪，朱婉菁
（辽宁工业大学 土木建筑工程学院，辽宁 锦州 121001）
摘要：为降低用于建筑节能的相变石蜡的使用温度和成本，以2种相变石蜡为基材，采用步冷曲线法分析确定了2种相变石蜡的最低共熔配比，利用DSC、FT-IR和加热-冷却试验，研究了二元低共熔相变石蜡的热物性、结构特征及蓄放热性能。结果表明，二元低共熔相变石蜡的最佳配比为78∶22，相变温度为18.7 ℃，较单一相变石蜡有所降低，相变潜热为119.2 J/g，介于2种石蜡之间，2种石蜡共混后没有发生化学反应，保持了良好的相变蓄热功能。
关键词：二元低共熔相变石蜡；步冷曲线；蓄热性能
中图分类号：TU55+1 文献标识码：A 文章编号：1001-702X（2018）11-0079-05
Preparation and thermo-properties of the binary phase change paraffin eutectic
MENG Duo，WANG Anqi，ZHU Wanjing
（School of Civil and Architectural Engineering，Liaoning University of Technology，Jinzhou 121001，China）
Abstract：For decreasing the working temperature and cost of the phase change paraffin for building energy conservation，two phase change paraffins were chosen to prepare the binary eutectic. Step-cooling curve method was conducted to determine the minimum eutectic ratio and the thermo-physical properties，structural characteristic and heat storage-release performance of the eutectic paraffin was examined by DSC and FT-IR technique and heat-cooling experiment. The results show that the mass ratio of the binary paraffin eutectic is 78/22. The phase change temperature of the paraffin eutectic is 18.7 ℃ which is lower than both of the two single paraffin and the latent heat is measured to be 119.2 J/g that between the two single paraffin. There were no chemical reactions between these two paraffins when they were mixed together. The paraffin eutectic has good phase change thermal storage performance.
Key words：binary phase change paraffin eutectic，step-cooling curve，thermal heat storage performance