期刊
ACS NANO
卷 8, 期 4, 页码 3606-3613出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn500134m
关键词
nanocomposite paper; boron nitride nanosheets; thermal conductivity; percolative network; optical transparence; nanofibrillated cellulose
类别
资金
- DOD (Air Force of Scientific Research) Young Investigator Program [FA95501310143]
- NSF [CBET 1232949]
- Maryland Nanocenter
- Fablab
- Nisplab
- NSF as a MRSEC
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1232949] Funding Source: National Science Foundation
In this work, we report a dielectric nanocomposite paper with layered boron nitride (BN) nanosheets wired by one-dimensional (1D) nanofibrillated cellulose (NFC) that has superior thermal and mechanical properties. These nanocompersite papers are fabricated from a filtration of BN and NFC suspensions, in which NFC is used as a stabilizer to stabilize BN nanosheets. In these nanocomposite papers, two-dimensional (2D) nanosheets form a thermally conductive network, while 1D NFC provides mechanical strength. A high thermal conductivity has been achieved along the BN paper surface (up to 145.7 W/m K for 50 wt % of BN), which is an order of magnitude higher than that In randomly distributed BN nanosheet composites and is even comparable to the thermal conductivity of aluminum alloys. Such a high thermal conductivity is mainly attributed to the structural alignment within the BN nanosheet papers; the effects of the interfacial thermal contact resistance are minimized by the fact that the heat transfer is in the direction parallel to the interface between BN nanosheets and that a large contact area occurs between BN nanosheets.
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