摘要
利用纳米成孔剂、相变胶囊制备相变水泥基微纳米多孔材料,研究其微观结构、力学性能、热工性能,并与水泥基微纳米多孔材料、相变水泥基材料进行对比。结果表明:高成孔剂掺量可降低试件的干密度及导热系数,掺入相变微胶囊会进一步降低导热系数,提高试件的比热容,其中成孔剂掺量为80%的相变水泥基微纳米多孔材料干密度及导热系数最低,分别为429.9 kg/m^(3)、0.086 W/(m·K),比热容为1.2 J/(g·K),具有较好的调控温度能力,相较于同尺寸的水泥净浆峰值温度降低7.2℃、谷值温度升高2.7℃,出现移峰填谷效应。
The phase change cement-based micro/nano-porous materials were prepared by using nanopore-forming agents and microencapsulated phase change materials.The microstructure,mechanical properties and thermal properties of the phase change cement-based micro/nano-porous materials were studied,and the results were compared with cement-based micro/nano-porous materials or phase change cement-based materials.The results show that the addition of high content of pore-forming agent can reduce the dry density and thermal conductivity of the materials,the addition of microencapsulated phase change materials can further reduce the compressive strength,dry density and thermal conductivity of the test materials,increase the porosity and average pore size,and greatly improve the specific heat capacity of the test materials.Among them,the phase change cement-based micro/nano-porous materials with a pore-forming agent content of 80% have the lowest dry density and thermal conductivity,were 429.9 kg/m~3 and 0.086 W/(m·K),and the specific heat capacity was 1.2 J/(g·K).The phase change cement-based micro/nano-porous materials have a good ability to regulate temperature,compared with the cement paste with the same size,the peak temperature decreased by 7.2 ℃ and the valley temperature increased by 2.7 ℃,and showed the effect of peak shifting and valley filling.
作者
王鸿
黄金桥
陈绍游
金超
刘铁
蒋俊
WANG Hong;HUANG Jin-qiao;CHEN Shao-you;JIN Chao;LIU Tie;JIANG Jun(State Key Laboratory for Environment-friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China;Ningbo Construction Engineering Group Co Ltd,Ningbo 345040,China)
出处
《武汉理工大学学报》
CAS
2024年第7期21-27,共7页
Journal of Wuhan University of Technology
基金
宁波市科技计划项目(2022T003)。
关键词
相变微胶囊
水泥基多孔材料
力学性能
微观结构
热工性能
microencapsulated phase change material
cement-basedporousmaterials
mechanical property
mi-crostructure
thermal property
作者简介
王鸿(2001-),女,硕士生.E-mail:3109245017@qq.com;通讯作者:蒋俊(1991-),男,博士,副教授.E-mail:jiangjun@swust.edu.cn。
