材料科学与工程学报2025，Vol.43Issue(3)：389-395,7.DOI:10.14136/j.cnki.issn1673-2812.2025.03.007
PU基固固相变储热材料及其调温沥青的制备与性能
Preparation and Properties of a PU-based Solid-solid Phase Change Thermal Energy Storage Material and Its Temperature Adjusting Asphalt
摘要
Abstract
To solve the problems such as reduced pavement stability caused by the high temperature of asphalt pavement in summer,a solid-solid phase change thermal storage material(PUPCM)with active temperature regulation function was synthesized using a two-step polymerization method and then used as an asphalt modifier.The chemical structure,phase change performance and thermal stability of the PUPCM were studied by FTIR,DSC and TG tests.The effects of PUPCM on the properties of temperature-adjusting asphalt were studied by the segregation,rheological and temperature regulation tests.The temperature regulation mechanism was revealed by the specific heat capacity test.The results indicate that the PUPCM exhibits solid-solid phase change behavior.It has no degradation and leakage problems at 180℃,which can withstand the high-temperature construction conditions of asphalt pavements.The PUPCM also has suitable phase change temperature values(melting and crystallization onset temperature values:48.07℃ and 37.50℃)and excellent phase change thermal energy storage ability(latent heat value:101.71 J/g).The incorporation of the PUPCM can improve the high-temperature stability and low-temperature cracking resistance of asphalt.To ensure the good storage stability,the largest content of PUPCM in the temperature-adjusting asphalt is 8％.Under this content,the time that the temperature of temperature-adjusting asphalt rises to 55℃ is 25 min later than the original asphalt,and the PUPCM can reduce the asphalt temperature up to 3.6℃.The reason is that the PUPCM always has larger specific heat capacity values than asphalt in the range of 20-60℃(especially in the phase change range).关键词
固固相变储热材料/调温沥青/流变性能/调温性能Key words
Solid-solid phase change thermal storage material/Temperature-adjusting asphalt/Rheological properties/Temperature regulation performance分类
交通工程引用本文复制引用
魏晋,贾猛,张帆,田鹏江..PU基固固相变储热材料及其调温沥青的制备与性能[J].材料科学与工程学报,2025,43(3):389-395,7.基金项目
国家自然科学基金项目(5240082747) （5240082747）
交通土建工程材料国家地方联合工程研究中心开放基金(TCEM-2023-02) （TCEM-2023-02）
山东省高等学校青创科技支持计划项目(2024KJH063) （2024KJH063）
