新型炭材料（中英文）2025，Vol.40Issue(5)：1136-1153,18.DOI:10.1016/S1872-5805(25)60977-2
高导热、刚-柔一体的石墨烯复合气凝胶基相变材料
A graphene composite aerogel with a high thermal conductivity,com-pressibility and flexibility meets the requirements of phase-change materials for rigid-flexible material innovation
摘要
Abstract
Oriented graphene aerogels have limited applica-tions because the flexibility of their graphene sheets and mi-crostructure give them a low skeleton strength,insufficient compression resilience,and poor flexibility.We report the preparation of novel aerogel materials with a much better per-formance.Using the driving force of graphene oxide(GO)self-assembly and π-π interactions,carbon nanotubes(CNTs)were attached to the GO sheets,and an oriented composite carbon skeleton was constructed using"hydro-plastic foam-ing".The introduction of CNTs significantly increased the strength of the skeleton and gave the aerogel an excellent re-versible compressibility.The innovative use of cold pressing greatly improved the thermal conductivity and flexibility of the aerogel,providing new ideas for the development of high-performance aerogels.Tests show that the obtained graphene composite aerogel has a reversible compressive strain of over 90%and can withstand 500 compression cycles along the direc-tion of pore accumulation.It can endure more than 10 000 bending cycles perpendicular to the direction of composite carbon layer stacking,and its in-plane thermal conductivity reaches 64.5 W·m-1·K-1.When filled with phase change materials,the high porosity of the carbon skeleton enables the material to have a high phase change filling rate,and its phase change enthalpy is greater than 150 J/g.Thanks to the exceptional flexibility of the carbon skeleton,the macrostructure of phase change materials can be bent as needed to adapt to thermal management scenarios and conform to device shapes.This significantly enhances practical application compatibility,providing flexible support for temperature control and thermal management across diverse device forms.关键词
取向石墨烯气凝胶/氧化石墨烯(GO)/碳纳米管(CNT)/水塑性发泡/相变材料Key words
Oriented graphene aerogel/GO/CNT/Hydro-plastic foaming/Phase change material分类
化学工程引用本文复制引用
崔佳铭,陈伊星,徐文涛,王胜..高导热、刚-柔一体的石墨烯复合气凝胶基相变材料[J].新型炭材料（中英文）,2025,40(5):1136-1153,18.基金项目
Funding was provided by Lanzhou University of Technology(2022CYZC-20). 兰州理工大学(No.2022CYZC-20). （2022CYZC-20）
