摘要
以SiO_(2)气凝胶粉末、硅酸盐水泥为原料,辅以质量分数为0,1.5%,2.5%,5.0%的碳纤维,制备建筑用碳纤维复合保温材料。结合BET、SEM、XRD、FT-IR及导热系数测试,分析碳纤维复合保温材料性能。结果表明:碳纤维的质量分数为2.5%时,材料孔容为0.454 cm^(3)/g,中孔占比增加,微观结构均匀且界面结合紧密,导热系数降至0.017 7 W/(m·K),较不含碳纤维的降低37.9%,同时高温下物相稳定性及化学结构均匀性最优。碳纤维质量分数为5.0%时,孔隙堵塞、团聚及导热系数回升。研究证实,碳纤维的质量分数为2.5%时,可优化材料的多孔结构与化学结合,兼顾保温性能与力学稳定性的平衡,为建筑节能、高性能保温材料的开发提供了参考。
Using SiO_(2) aerogel powder and silicate cement as raw materials,and adding carbon fibers with mass fractions of O,1.5%,2.5%,and 5.0% respectively,a carbon fiber composite insulation material for buildings was prepared.Through combined analysis using BET,SEM,XRD,FT-IR and thermal conductivity tests,the performance of the carbon fiber composite insulation material was analyzed.The results showes that when the carbon fiber mass fraction is 2.5%,the material's pore volume is 0.454 cm^(3)/g,the proportion of mesopores increases,the microstructure is uniform and the interface is tightly combined,the thermal conductivity droppes to 0.0177 W/(m·K),which is 37.9% lower than that of the material without carbon fibers,and at the same time,the phase stability and chemical structure uniformity under high temperature are the best.When the carbon fiber mass fraction is 5.0%,the pores are blocked,agglomerated and the thermal conductivity increases.The research confirmes that when the carbon fiber mass fraction is 2.5%,the multi-porous structure and chemical bonding of the material can be optimized,balancing the insulation performance and mechanical stability,providing a reference for the development of building energy-saving and high-performance insulation materials.
作者
卫倩倩
刘婉娟
WEI Qianqian;LIU Wanjuan(School of Applied Technology,Huanghe Science&Technology University,Jiyuan 459000,China)
出处
《兵器材料科学与工程》
北大核心
2025年第5期54-59,共6页
Ordnance Material Science and Engineering
基金
河南省科技攻关项目(242102220013)。
关键词
碳纤维
保温材料
导热性能
化学性能
XRD分析
carbon fiber
insulation material
thermal conductivity
chemical property
XRD analysis
