摘要
将氧化石墨烯和石墨烯纳米片通过水热法制备成混杂三维网状石墨烯。以棕榈酸作为相变材料,通过真空浸渍法,棕榈酸与混杂三维网状石墨烯复合得到混杂三维网状石墨烯相变复合材料。系统研究石墨烯纳米片的种类与掺量对相变复合材料热性能的影响,并对混杂三维网状石墨烯的导热增强机理进行分析。研究结果表明:随着石墨烯纳米片掺量的增加,相变复合材料的热导率提高。石墨烯纳米片的种类影响相变复合材料的热性能。掺加M系列石墨烯纳米片的混杂三维网状石墨烯能够显著提高相变材料热导率,但相变潜热与相变温度变化较小。当石墨烯纳米片的掺量为8%时,掺加M系列石墨烯纳米片的相变复合材料的热导率为0.634W/(m·K),与棕榈酸相比,热导率增大3.2倍。
Hybrid composites made of three-dimensional（3D） networked graphene and a phase change material（PCM） were synthesized by hydrothermal processing of graphene nanoplates（GNPs） and graphene oxide. Palmitic acid（PA） was used as the PCM. The composite PCM were prepared by vacuum impregnation. The effects of the type and content of GNPs on the thermal properties of the composite PCMs were investigated. The results showed that an increase in the content of GNPs increased the thermal conductivity of the composites PCMs. The type of GNPs had an influence on the thermal properties of the PCM composites The M-type of GNPs had the most significant effect on the thermal conductivity of the composite PCMs. No obvious changes to the latent heat and the phase change temperature were observed. When the content of GNPs was 8%, the thermal conductivity was 0.634 W/（m·K）, which was almost a 3-fold increase compared with the PA. The heat transfer enhancement mechanisms were also discussed.
出处
《储能科学与技术》
CAS
CSCD
2017年第4期675-680,共6页
Energy Storage Science and Technology
关键词
三维网状石墨烯
相变材料
热导率
热性能
graphene
phase change material
thermal conductivity
thermal properties
