相变膨胀珍珠岩制备工艺及相变控温砂浆性能

发布时间：2018-03-09 08:41

本文选题：二元低共熔脂肪酸　切入点：相变骨料　出处：《同济大学学报(自然科学版)》2015年03期 　论文类型：期刊论文

【摘要】：根据低共熔相变点理论计算结果,制备月桂酸-肉豆蔻酸二元低共熔脂肪酸相变材料,以膨胀珍珠岩为无机载体,采用高温真空浸渍法制备相变骨料,并对其进行包裹,确定最佳包裹材料及掺量.通过场发射扫描电镜观测相变骨料切割截面,脂肪酸经吸附进入多孔颗粒内部,并黏附于珍珠岩孔隙内壁,经石蜡包裹后脂肪酸相变材料较稳定地处于石蜡与膨胀珍珠岩内壁包围的孔空间内.利用相变骨料制备相变控温砂浆,测试其物理力学性能及热性能.结果表明:相变珍珠岩砂浆板物理力学性能达到建筑保温砂浆标准要求,且具有较好的控温效果,随着脂肪酸掺量的增加,有效热量值降低越多,温度延时越长,降温幅度越大.
[Abstract]:Based on the calculation results of low eutectic phase change point theory, the phase change material of lauric acid and myristic acid binary eutectic fatty acid was prepared. The phase change aggregate was prepared by high temperature vacuum impregnation method with expanded perlite as inorganic carrier, and the phase change aggregate was encapsulated. The optimum encapsulation material and content were determined. The cut cross section of phase change aggregate was observed by field emission scanning electron microscope. Fatty acids were adsorbed into the porous particle and adhered to the inner wall of perlite pore. The phase change material of fatty acid after paraffin is stably located in the pore space surrounded by the inner wall of paraffin and expanded perlite. Phase change controlled temperature mortar is prepared from phase change aggregate. The results show that the physical and mechanical properties of phase change perlite mortar plate meet the requirements of building insulation mortar, and it has better temperature control effect with the increase of fatty acid content. The more the effective heat value decreases, the longer the temperature delay is and the larger the cooling range is.
【作者单位】：同济大学材料科学与工程学院;同济大学先进土木工程材料教育部重点实验室;
【基金】：国家自然科学基金(51378391) “十二五”国家科技支撑计划(2011BAE27B04)
【分类号】：TU551.3

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