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为了提高建筑围护结构的蓄热能力,降低建筑能耗,开发能够用于建筑围护结构的室温复合石蜡相变陶粒。按照单因素试验法将52号石蜡和液体石蜡加热共融制备复合石蜡相变材料,采用真空吸附法将复合石蜡吸附于页岩陶粒中,分别采用苯丙乳液、环氧树脂、水泥净浆对吸附石蜡的陶粒进行封装,以满足建筑应用。利用差示扫描量热仪、压汞仪、扫描电镜等分别对相变陶粒相变温度、相变潜热、封装效果、吸附率、微观表征和相容性等进行试验测试。结果表明:复合石蜡的相变温度能够涵盖建筑室内、外热环境范围(18~35℃),石蜡通过真空吸附法能够大量吸附进入陶粒内部,吸附率在58%以上,并黏附于陶粒孔隙内壁,具有较好的相容性,相变陶粒的石蜡吸附量主要取决于陶粒中大孔的数量。
In order to increase the thermal storage capacity of the building envelope and reduce the building energy consumption, the room temperature composite paraffin phase change ceramsite can be developed for the building envelope. According to the single factor experiment method, the paraffin wax phase change material was prepared by heating and melting paraffin 52 and liquid paraffin. The paraffin wax was adsorbed on the shale ceramsite by vacuum adsorption method. Styrene-acrylic emulsion, epoxy resin and cement paste Encapsulate paraffin-embedded ceramsite to meet architectural applications. The phase transition temperature, phase transition latent heat, encapsulation effect, adsorption rate, microscopic characterization and compatibility of the phase transformation ceramsite were tested by differential scanning calorimetry, mercury intrusion porosimetry and scanning electron microscope respectively. The results show that the paraffin phase transition temperature can cover the indoor and outdoor thermal environment (18 ~ 35 ℃), the paraffin wax can be adsorbed into the ceramsite by vacuum adsorption, the adsorption rate is above 58% and adhered to the ceramsite Pore wall, with good compatibility, phase change ceramsite paraffin adsorption mainly depends on the number of large pores in the ceramsite.