导热增强聚氨酯基柔性定形相变材料的制备及性能  

Preparation and properties of thermal conductivity enhanced polyurethane based flexible and form-stable phase change materials

作　　者：赵梦阳 张宇昂 唐炳涛[1] ZHAO Mengyang;ZHANG Yuang;TANG Bingtao(State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]大连理工大学精细化工国家重点实验室,辽宁大连116024

出　　处：《精细化工》2022年第6期1155-1161,1189,共8页Fine Chemicals

基　　金：国家自然科学基金(22178050,22108026)。

摘　　要：以聚乙二醇(PEG10000)和氨丙基封端的聚二甲基硅氧烷(APDMS)为软段,甲苯-2,4-二异氰酸酯为硬段,碳纳米管(CNTs)为功能性材料,采用一锅法制备了导热增强的聚氨酯基柔性定形相变材料(PU/APDMS/CNTs)。采用FTIR、XRD、DSC和TGA表征了材料的结构特征和热性能。结果表明,当APDMS的含量(以软段和硬段单体总质量计,下同)为10%,CNTs含量为5%时,制备的PU/APDMS-1/CNTs的相变焓值为88.3 J/g,在200℃内不发生热分解,具有良好的热稳定性和定形相变效果,能够实现光热转换和热能存储,其光热转换和热能存储效率为62.8%,与未加入CNTs的相变材料相比,导热性能明显增强,其升降温速率提高了1.76倍。PU/APDMS-1/CNTs能够贴附于散热片表面随之弯曲,反复弯折100次后,其相变性能、柔韧性以及形态无明显变化。Polyurethane based flexible form-stable phase change materials(PU/APDMS/CNTs) with enhanced thermal conductivity were prepared by one-pot method using polyethylene glycol(PEG10000)and aminopropyl terminated polydimethylsiloxane(APDMS) as soft segments, toluene 2, 4-diisocyanate as hard segments, and carbon nanotubes(CNTs) as functional materials. The structural characteristics and thermal properties of materials were characterized by FTIR, XRD, DSC and TGA. When the content(based on the total mass of soft and hard monomers, the same below) of APDMS was 10% and that of CNTs was 5%, the prepared PU/APDMS-1/CNTs had a phase change enthalpy value of 88.3 J/g and no thermal decomposition at 200 ℃, exhibited good thermal stability and form-stable performance, and could realize photothermal conversion and heat storage. The photothermal conversion and heat storage efficiency of PU/APDMS-1/CNTs was 62.8%. Compared with that of the phase change material without CNTs, the thermal conductivity was obviously enhanced, and the rate of rise and fall was increased by 1.76 times.PU/APDMS-1/CNTs could be attached to the surface of the heat sink and then bent. After repeated bending for 100 times, the phase transformation properties, flexibility and morphology of PU/APDMS-1/CNTs had no obvious change.

关 键 词：相变材料 柔性 聚氨酯 导热 聚二甲基硅氧烷 热能存储 功能材料 

分 类 号：TB34[一般工业技术—材料科学与工程]