为解决固-液相变材料封装问题,以石蜡为芯材,陶粒颗粒为载体,水泥为封装材料制备了石蜡胶囊.分析了石蜡胶囊的基本性质,测试了石蜡胶囊的DSC曲线;并将石蜡胶囊掺入砂浆中,研究了掺入石蜡胶囊对砂浆热导和力学性能的影响.研究表明:使用水泥封装后,石蜡胶囊的密封性好,高温下不会发生泄露;石蜡胶囊掺入砂浆中,对砂浆力学性能影响较小,且可降低砂浆的导热系数和水泥水化温度,并推迟水化温度峰值的出现.
To resolve the sealing problem of solid-liquid phase change materials when transforming into liquid, a novel paraffin-based capsule was prepared with paraffin as the core material, ceramsite particles as the carrier and cement paste as the coating material.The basic properties of the paraffin-based capsule were tested, and the test of DSC was conducted.In addition, the thermal conductance and mechanical properties of mortar incorporated with paraffin-based capsule were tested.Results reveal that cement paste helpes the paraffin-based capsule maintain a good hold ability of the loaded paraffin, without leakage under high temperature.The incorporation of paraffin-based capsule into mortar does not negatively affect the mechanical property of mortar, moreover, it reduces the thermal conductivity and hydration temperature of cement paste and delayes the appearance of the highest hydration temperature.
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