超声辅助强制浸润法制备CNT-Gr/PDMS导热复合材料

Thermal Conductive CNT-Gr/PDMS Composites Prepared via Ultrasonic-assisted Forced Infiltration Method

由于电子器件的小型化、便携性和灵活性的快速发展,对具有高导热性和力学柔性聚合物复合材料的需求显著增加。介绍了一种通过超声辅助强制浸润方法制备具有优良导热性和力学柔性的碳纳米管(CNT)-石墨烯(Gr)/聚二甲基硅氧烷(PDMS)复合材料。在复合体系中,不同的CNT与Gr的质量比会导致不同的导热性能,当CNT与Gr的质量比达到3∶1时,CNT-Gr(3∶1)/PDMS复合材料的导热系数为4.641 W/(m·K),比纯PDMS复合材料的导热系数0.27 W/(m·K)高1619%。此外,CNT-Gr(3∶1)/PDMS复合材料还具有优异的力学性能,其拉伸强度和断裂伸长率分别达到3.29 MPa和29.40%。所制备的PDMS复合材料在电子器件的热管理方面具有很强的应用潜力。

Due to the rapid development of miniaturization,portability and flexibility of electronic devices,the demand for polymer composites with high thermal conductivity and mechanical flexibility had increased significantly.A carbon nanotube(CNT)-graphene(Gr)/polydimethylsiloxane(PDMS)composite with excellent thermal conductivity and mechanical flexibility was prepared by ultrasound-assisted infiltration.When the mass ratio of CNT and Gr reaches 3∶1,the thermal conductivity of CNT-GR(3∶1)/PDMS composite is 4.641 W/(m·K),which is 1619%higher than that of pure PDMS matrix.In addition,CNT-GR(3∶1)/PDMS composite also has excellent mechanical properties.The tensile strength and elongation at break of CNT-Gr(3∶1)/PDMS composites could achieve 3.29 MPa and 29.40%,respectively.The PDMS composites have great potential in thermal management of electronic devices.