以石蜡为相变材料、膨胀石墨为支撑结构制备复合相变材料(CPCM),采用差示扫描量热仪、傅里叶红外光谱仪、导热系数测试仪和RC-4温度测试仪,研究了 CPCM的性质及其对磷酸镁水泥(MPC)水化产物、导热性以及水化热的影响规律。实验表明,与石蜡相比,CPCM的相变温度、相变焓略有降低,颗粒粒径减小,分散性提高,导热性能增强；CPCM是石蜡和膨胀石墨的物理复合,没有新物质生成,具有相变材料良好的热性能,通过CPCM相变,吸收MPC水化放出的热量,使得水化体系温度降低,MPC 水化反应速度减慢；CPCM加入 MPC后,CPCM相变控温范围无明显变化,MPC 导热系数略有减小,MPC 水化产物无明显变化,吸热峰温度略有升高,热稳定性提高。
The composite phase change material (CPCM)was prepared by using paraffin as phase change materi-al and expanded graphite as the supporting structure.Differential scanning calorimeter,Fu Li ye infrared spec-trometer,thermal conductivity coefficient tester and RH-4 temperature test instrument are used.The properties of CPCM and its effect on the hydration products,thermal conductivity and hydration heat of magnesium phos-phate cement (MPC)were studied.Test shows:compared with paraffin,the phase change temperature and phase change enthalpy of CPCM decreased,the particle size decreased,the dispersion increased,and the ther-mal conductivity was enhanced.CPCM was a physical complex of paraffin and expanded graphite,which has no new material and has good thermal properties of phase change materials.By phase transformation of CPCM,the hydration heat of MPC was absorbed,and the hydration system temperature was decreased,and the reaction rate of MPC was slowed down.After the addition of CPCM,the temperature range of CPCM phase changing was not obvious,The thermal conductivity of MPC was slightly decreased,and there was no obvious change of MPC hydration products,the temperature of the heat absorption peak was slightly increased,and the thermal stability was improved.
参考文献
| [1] | 赖振宇;钱觉时;卢忠远;李倩;邹秋林.不同温度处理对磷酸镁水泥性能的影响[J].功能材料,2012(15):2065-2070. |
| [2] | 陈兵;雒亚莉;王菁.磷酸镁水泥性能试验研究[J].水泥,2010(7):14-18. |
| [3] | 刘凯;李东旭.磷酸镁水泥的研究与应用进展[J].材料导报,2011(13):97-100. |
| [4] | 汪宏涛;钱觉时;曹巨辉;唐春平.粉煤灰对磷酸盐水泥基修补材料性能的影响[J].新型建筑材料,2005(12):41-43. |
| [5] | 孙道胜;孙鹏;王爱国;许炜.磷酸镁水泥的研究与发展前景[J].材料导报,2013(9):70-75. |
| [6] | 马保国;王景然;李相国;何超.不同环境条件下磷酸镁水泥对硝酸铅的固化[J].功能材料,2013(21):3183-3185,3189. |
| [7] | 王景然;马保国;李相国;李海南;田振.磷酸镁水泥固化Pb2＋、Zn2＋、Cu2＋及其水化产物研究[J].功能材料,2014(5):5060-5064. |
| [8] | 林毓韬;徐涛;朱忠其;柳清菊.Ag-LaFeO3的制备及甲醛气敏性能研究[J].功能材料,2012(7):831-834. |
| [9] | 徐选臣;邵云霞.水灰比对磷酸钾镁水泥性能的影响[J].硅酸盐通报,2013(2):236-241. |
| [10] | 段新勇;吕淑珍;赖振宇;牟思丞;廖其龙.多元复合缓凝剂制备及其对磷酸镁水泥性能的影响[J].武汉理工大学学报,2014(10):20-25. |
| [11] | 张钦真;郑秋云;赵增武;李保卫;张信荣.石蜡型复合相变材料蓄热性能实验研究[J].中国科技论文,2013(9):935-939. |
| [12] | 侯景鹏;史巍;张雄.石蜡相变控温混凝土热性能研究[J].建筑材料学报,2012(6):767-770. |
| [13] | Ahmet Sari;Ali Karaipekli.Thermal conductivity and latent heat thermal energy storage characteristics of paraffin/expanded graphite composite as phase change material[J].Applied thermal engineering: Design, processes, equipment, economics,20078-9(8-9):1271-1277. |
| [14] | 杨建明;史才军;常远;杨楠.掺复合缓凝剂的磷酸钾镁水泥浆体的水化硬化特性[J].建筑材料学报,2013(1):43-49. |
| [15] | 周序洋;杨建明;王进.磷酸钾镁水泥水化体系的微结构演化[J].硅酸盐通报,2012(6):1438-1444. |
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