十二醇/膨胀石墨相变石膏的制备与性能研究  

Preparation and Performance Study of Dodecyl Alcohol/Expanded Graphite Phase Change Gypsum

作　　者：陈倩倩 冯启彪 龚旭鹏 梁卫东[1] Chen Qianqian;Feng Qibiao;Gong Xupeng;Liang Weidong(School of Petrochemical Technology,Lanzhou University of Technology,Lanzhou,Gansu 730050;College of Hydraulic Engineering,Lanzhou University of Resources and Environment,Lanzhou,Gansu 730022)

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]兰州资源环境职业技术大学水利工程学院,甘肃兰州730022

出　　处：《非金属矿》2025年第2期33-36,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51962018);甘肃省高等学校产业支撑计划(2024CYZC-19);兰州市人才创新创业项目(2023-RC-11)。

摘　　要：为解决建筑领域的能耗问题,提升相变材料在该领域的应用性能,以膨胀石墨为介质吸附相变材料十二醇制备相变粉末(DEG),用果胶和海藻酸钠溶液为成膜剂对DEG进行微封装,制备出抗泄漏能力优异的相变复合材料(MDEG),进一步将建筑石膏、玻璃纤维、MDEG混合后经干燥、固化制得十二醇/膨胀石墨相变复合石膏(PCGB),并检测其储能性能、保温性能和机械性能。结果表明,选用十二醇含量较高的相变复合材料DEG-3,相变复合石膏的相变焓值为36.10 kJ/kg,导热系数为0.52512 W/(m·K),断裂载荷为10500 N。表明十二醇/膨胀石墨相变复合石膏是一种性能优异、可靠性高的建筑节能材料,具有潜在的应用前景。To address energy consumption issues in the construction field and enhance the application performance of phase change materials in this domain,the phase change powder(DEG)was prepared by adsorbing phase change material dodecyl alcohol with expanded graphite as the medium,the phase change composite materials(MDEG)with superior leak resistance were prepared by microencapsulation of DEG with pectin and sodium alginate solutions as film-forming agents.Furthermore,construction gypsum,glass fibers,MDEG were mixed and processed through drying and solidifying to prepare dodecanol/expanded graphite phase change gypsum(PCGB).The energy storage performance,thermal insulation property,and mechanical characteristic of PCGB were systematically investigated.The results show that the phase change enthalpy of PCGB with DEG-3 was 36.10 kJ/kg,thermal conductivity was 0.52512 W/(m·K),and fracture load was 10500 N,indicating that dodecyl alcohol/expanded graphite phase change composite gypsum is a kind of building energy saving material with excellent performance and high reliability,and has potential application prospects.

关 键 词：脂肪醇 相变储能 建筑节能 石膏砌块 

分 类 号：TQ177.3[化学工程—硅酸盐工业]