石墨烯含量及膜定量对导热石墨烯膜性能的影响

Effect of Graphene Content and Basis Weight on Performance of Thermal Conductive Graphene Membrane

关键词:  纳米微纤化纤维素  石墨烯  导热系数

Key Words:nanofibrillated cellulose  graphene  thermal conductivity

摘要:本研究以纳米微纤化纤维素（NFC）和石墨烯（GR）为原料，通过湿法造纸技术，制备超薄高导热复合膜（GR/NFC膜），并探讨了GR含量和膜定量对GR/NFC膜性能的影响。结果表明，GR含量和GR/NFC膜的定量均会影响GR/NFC膜的整体性能。TG-DSC分析显示，随GR含量增加，GR/NFC膜的热稳定性增加，膜内部孔隙变小，导热系数提高。当GR/NFC膜定量80 g/m²，GR含量10%时，膜的导热系数为9.863 W/(m·K)。当GR含量提高至30%时，GR/NFC膜的导热系数提高了43.72%；当GR含量30%，GR/NFC膜定量从40 g/m²提高至80 g/m²时，膜的导热系数提高了23.24%。

Abstract:In this study， nanofibrillated cellulose （NFC） and graphene （GR） were used as raw materials to prepare ultra-thin high thermal conductive composite membrane （GR/NFC membrane） through wet papermaking technology， and the effects of GR content and basis weight of membrane on the performance of GR/NFC membrane were also discussed. The results showed that both the GR content and basis weight affected the overall performance of the GR/NFC membrane. TG-DSC analysis showed that the thermal stability of GR/NFC membrane increased with the increase of GR content， the pore of membrane became smaller， and the thermal conductivity was improved. When the basis weight of GR/NFC membrane was 80 g/m² and the GR content was 10%， the thermal conductivity was 9.863 W/（m·K）. When the GR content increased to 30%， the thermal conductivity was increased by 43.72%. When the GR content was 30% and the basis weight of GR/NFC membrane was increased from 40 g/m² to 80 g/m²， the thermal conductivity increased by 23.24%.