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Constructing a Layer-by-Layer Architecture to Prepare a Transparent, Strong, and Thermally Conductive Boron Nitride Nanosheet/Cellulose Nanofiber Multilayer Film
journal contribution
posted on 2020-02-24, 20:11 authored by Zhuorong Hu, Shan Wang, Yingchun Liu, Zhencai Qu, Zhiyou Tan, Kun Wu, Jun Shi, Liyan Liang, Mangeng LuConstructing
a layer-by-layer framework is a highly efficient strategy for preparing
thermal management materials with excellent performance. In this report,
thermal oxidation and ultrasonic exfoliation of hexagonal boron nitride
can prepare hydroxylated boron nitride nanosheet (BNNS-OH). BNNS-OH
layer and cellulose nanofiber (CNF) layer are assembled, respectively,
on the CNF surface to form a homogeneous film by vacuum-assisted self-assembly
and hydrogen bond interaction. With the increase in the number of
BNNS-OH layers and CNF layers, the in-plane thermal conductivity of
the multilayer film increases dramatically, which is up to 1.47 W·m–1·K–1 for 0.16 wt % BNNS-OH,
and the thermal conductivity efficiency of the unit weight filler
is up to 1142%. The multilayer films maintain optical transparency
and mechanical property owing to the hierarchical structure and ultralow
filler content. This work provides a new method to prepare a good
transparent, mechanically and thermally conductive cellulose nanofiber/boron
nitride nanosheet multilayer film, which is promising for thermal
dissipation in a series of modern devices.
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- Biophysics
- Space Science
- Physical Sciences not elsewhere classified
- Microbiology
- Cell Biology
- Molecular Biology
- Pharmacology
- Biotechnology
- Evolutionary Biology
- Environmental Sciences not elsewhere classified
- Ecology
- Biological Sciences not elsewhere classified
- Developmental Biology
- Inorganic Chemistry
- Infectious Diseases
Keywords
management materialsCNF surfaceBNNS-OH layerslayer-by-layer frameworkboron nitridehydroxylated boron nitride nanosheetConstructingLayer-by-Layer Architectureultralow filler contentCNF layerscellulose nanofibervacuum-assisted self-assemblyunit weight fillerBNNS-OH layerconductivity efficiencyfilm increaseshydrogen bond interaction
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