中低温双阶相变聚氨酯硬泡的制备及性能  

Preparation and properties of medium and low temperaturedual-stage phase change polyurethane rigid foam

作　　者：高宁 张伟丽 唐婷 杜焦丽 孙博存 李又兵[1,2,3] 夏天 GAO Ning;ZHANG Weili;TANG Ting;DU Jiaoli;SUN Bocun;LI Youbing;XIA Tian(School of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China;Chongqing Key Laboratory of Mold Technology,Chongqing 400054,China;Ministry of Education Key Laboratory of Advanced Manufacturing Technology for Auto Parts,Chongqing 400054,China)

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400054 [2]重庆市模具技术重点实验室,重庆400054 [3]汽车零部件先进制造技术教育部重点实验室,重庆400054

出　　处：《功能材料》2023年第5期5217-5222,5229,共7页Journal of Functional Materials

基　　金：重庆市教委重大科技项目(KJZD-M201901101);重庆市教委创新群体项目(CXQT19027);重庆市研究生科研创新项目(CYS22639)。

摘　　要：采用真空吸附法制备了十八烷/膨胀石墨和石蜡/膨胀石墨定形相变材料为前驱体,将其按比例复配得到中低温双阶相变材料,并采用全水发泡一步法制备了中低温双阶相变聚氨酯硬泡材料。通过SEM、DSC、TGA和万能试验机等测试方法对聚氨酯硬泡的泡孔结构、力学性能、相变性能、热稳定性和调温能力进行研究。结果表明,当双阶相变材料为95%时,其熔融焓和结晶焓分别为58.29和53.69 J/g,且在匀速加热和降温的过程中,在26oC和60oC出现了恒温平台,表现出良好的调温控温能力。Octadecane/expanded graphite and paraffin/expanded graphite shape-set phase change material precursors were prepared by vacuum adsorption.The medium and low-temperature dual-stage phase change polyurethane rigid foam was prepared by a one-step foa ming method.Cell structure,mechanical properties,phase change properties,thermal stability and temperature regulation capability of polyurethane rigid foams were investigated by SEM,DSC,TGA,universal testing machine and other test methods.The results showed that when the dual-stage phase change material was 95 wt%,the melting enthalpy and crystallization enthalpy of the medium-low temperature dual-stage phase-change polyurethane rigid foam reached 58.29 J/g and 53.69 J/g,respectively.Tow constant temperature platforms appeared at 26℃and 60℃,respectively in the process of uniform heating and cooling,showing excellent temperature regulation and control ability.

关 键 词：十八烷 石蜡 膨胀石墨 双阶相变材料 聚氨酯硬泡 调温控温 

分 类 号：TU[建筑科学] TB34[一般工业技术—材料科学与工程]