癸酸-棕榈酸/硅藻土储能石膏复合材料的制备与性能  

Preparation and characterization of gypsum composites containing cupric-palmitic acid based phase change material in diatomite

作　　者：石文华 朱兴元[1] 朱教群[1] 刘凤利 李儒光[1] 张弘光[1] 

机构地区：[1]武汉理工大学材料与科学工程学院,湖北武汉430070 [2]河南大学材料与结构研究所,河南开封475004

出　　处：《储能科学与技术》2017年第6期1306-1312,共7页Energy Storage Science and Technology

基　　金：湖北省科技支撑计划项目(2015BAA107)

摘　　要：本文以脂肪酸癸酸(CA)-棕榈酸(PA)为相变材料,以多孔硅藻土为吸附介质,采用熔融吸附法制备CA-PA/硅藻土定形相变材料,将CA-PA/硅藻土掺入石膏基体中制备相变储能石膏复合材料。采用差示扫描量热分析仪(DSC)测定CA-PA/硅藻土定形相变材料和相变储能石膏复合材料的相变温度、相变焓,并通过储放热实验、稳定性实验、强度实验和吸水实验,对相变储能石膏复合材料的储放热性能、热循环稳定性、抗压强度、吸水性能等相关性能进行测试。结果表明,定形相变材料的相变温度和相变焓分别为26.44℃、83.71 J/g,随着定形相变材料掺量的增加,相变储能石膏复合材料的相变焓增加,强度和吸水率不断降低。最终确定掺量为25%定形相变材料的相变储能石膏(25%相变石膏)综合性能最佳,其相变温度为22.76℃,相变焓为8.42 J/g,7 d绝干抗压强度为5.93 MPa,7 d饱水抗压强度为4.59 MPa,吸水率为15.0%,具有良好的储放热性能、热循环稳定性能和防火耐燃性能。Cupric acid（CA）-palmitic acid（PA） based phase change material（PCM） was adsorbed by porous diatomite to form shape-stabilized PCM.The shape stable PCM was then mixed with gypsum to form gypsum composite.A differential scanning calorimetry（DSC） was used to measure the phase change temperature and the enthalpy of the composite PCM and the gypsum composite containing PCM in diatomite.The thermal storage material was further tested for the stability,strength,and water absorption behavior.The results showed that the phase change temperature and the enthalpy of the shape-stable are respectively 26.44 ℃and 83.71 J·g-1.An increase in the addition of the PCM in the gypsum increases the phase change enthalpy,whereas the strength and the rate of water absorption decrease.It is found that the gypsum composite with 25% of shape-stable phase change materials being the best with a phase change temperature of 22.76 ℃,a phase change enthalpy of 8.42 J·g-1,a 7-day oven dry compressive strength of 5.93 MPa,a 7-day full water compressive strength of 4.59 MPa,and a bibulous rate of 15.0%.

关 键 词：脂肪酸 硅藻土 定形相变材料 相变储能石膏复合材料 

分 类 号：TU526[建筑科学—建筑技术科学]