| 摘要: |
| 以多孔石墨为载体,采用高温吸附法将月桂酸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70℃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1014%. |
| 关键词: 脂肪酸 多孔石墨 冷热循环 碱环境 耐久性 |
| DOI：103969/j.issn1007 9629201601031 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51378391）；“十二五”国家科技支撑计划项目（2011BAE27B04） |
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| Process of Phase Change Graphite and Its Durability |
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HE Yan1,2, ZHANG Xiong1,2
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1.School of Materials Science and Engineering, Tongji University, Shanghai 201804, China;2.Key Laboratory ofAdvanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China
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| Abstract: |
| Using the porous graphite as an inorganic carrier, through the physical adsorption in high temperature, 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 firing 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 composite phase change product achieves less than 3% mass loss after thermal cooling cycling. The phase transformation point is not changed and the loss of enthalpy of transformation is 1014% after being immersed into alkaline environment. |
| Key words: fatty acid porous graphite thermal cooling cycling alkaline environment durability |
