Cellulose Nanofiber Supported 3D Interconnected BN Nanosheets for Epoxy Nanocomposites with Ultrahigh Thermal Management Capability. (19th December 2016)

• Record Type: Journal Article
• Authors: Chen, Jin; Huang, Xingyi; Zhu, Yingke; Jiang, Pingkai
• Is Part Of: Advanced functional materials. Volume 27:Number 5(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2016-12-19
• Subjects: boron nitride nanosheets -- cellulose nanofibers -- epoxy resin -- nanocomposites -- thermal conductivity; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201604754
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract : Thermally conductive but electrically insulating polymer composites are highly desirable for thermal management applications because of their wide range of utilization, ease of processing, and low cost. However, the traditional approaches to thermally conductive polymer composites usually suffer from the low thermal conductivity enhancement and/or the deterioration of electrical insulating property. In this study, using cellulose nanofiber‐supported 3D interconnected boron nitride nanosheet (3D–C–BNNS) aerogels, a novel method for highly thermally conductive but electrically insulating epoxy nanocomposites is reported. The nanocomposites exhibit thermal conductivity enhancement of about 1400% at a low BNNS loading of 9.6 vol%. In addition, the epoxy nanocomposites are still highly insulating, having a volume electrical resistivity of 10 15 Ω cm. The strong potential application for thermal management has been demonstrated by the surface temperature variations of the nanocomposites with time during heating and cooling. Abstract : A novel strategy for the fabrication of cellulose nanofiber supported 3D interconnected boron nitride nanosheet (3D‐C‐BNNS) aerogels is presented. The aerogels show significant enhancement of thermal conductivity of epoxy nanocomposites while maintaining the excellent electrical insulating property of the nanocomposites. Accordingly, the corresponding epoxy/3D‐C‐BNNS nanocomposites exhibit strong thermal management capability.