相变石墨工艺及其耐久性研究.pdfVIP

第19卷第1期 建 筑 材 料 学 报 Vo1．19，NO．1 学兔兔 2016年 2月 J OURNAL OF BUILDING MATER1ALS Feb．，2O16 文章编号：1007—9629(2016)01—0181—04 相变石墨工艺及其耐久性研究 何 燕， 张 雄 (1．同济大学材料科学与工程学院，上海201804； 2．同济大学先进土木工程材料教育部重点实验室，上海201804) 摘要：以多孔石墨为载体，采用高温吸附法将月桂酸一肉豆蔻酸二元低共融脂肪酸与其复合制备多 孔石墨基复合相变材料，通过冷热循环耐久性试验检测其温度敏感性和长期稳定性，以此确定多 孔石墨最佳烧制工艺及脂肪酸吸附量、吸附温度．结果表明：烧制温度为800℃的多孔石墨，在水浴 温度为7O℃的条件下可吸附700 (质量分数)脂肪酸，这种以多孔石墨为载体所制备的复合相变 材料冷热循环质量损失小于3 ，碱浸泡前后相变点基本无变化，相变焓损失为10．14 ． 关键词：脂肪酸；多孔石墨；冷热循环；碱环境；耐久性 中图分类号：TU599 文献标志码：A doi：10．3969／ ．issn．1007—9629．2016．O1．031 Process of Phase Change Graphite and Its Durability HE Yah， ZHANG Xiong (1．School of Materials Science and Engineering，Tonal University，Shanghai 201804，China；2．Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education，Tongji University，Shanghai 201804，China) Abstract：Using the porous graphite as an inorganic carrier，through the physica1 adsorption in high tern— perature，tWO fatty acids，lauric acid and myristic acid，were adsorbed into porous graphite．According to the temperature sensibility and long—term stability detected by hot and cold durability test，the proper fir— ing technology，the adsorption content of fatty acids，and the adsorption temperature were determined． The results show that when the firing temperature is 800℃ ，the porous graphite can adsorb 700 (by mass)fatty acids phase—change materials into the internal pores under 70℃ water bath．This kind of com- posite phase change product achieves less than 3 mass loss after thermal—cooling cycling．The phase transformation