Holocellulose nanofibrils assisted exfoliation of boron nitride nanosheets for thermal management nanocomposite films.

Authors :: Zhang C
Wang M
Lin X
Tao S
Wang X
Chen Y
Liu H
Wang Y
Qi H
Source :: Carbohydrate polymers [Carbohydr Polym] 2022 Sep 01; Vol. 291, pp. 119578. Date of Electronic Publication: 2022 May 06.
Publication Year :: 2022
Abstract: High-quality boron nitride nanosheets (BNNSs) were exfoliated via eco-friendly holocellulose nanofibrils (HCNFs) assisted ultrasound treatment in water. The resultant H-BNNSs possessed high yields (23.4%), few surface defects, a high aspect ratio (~134), and excellent dispersibility in water (Zeta potential, -53.5 mV). Furthermore, H-BNNSs were functionalized by liquid metal (Gallium, Ga) dominated interface engineering and assembled with cellulose fibers into Ga@H-BNNSs filled nanocomposite films. Owing to the well-designed interface engineering, the obtained nanocomposite films exhibited outstanding integrated performance, especially excellent in-plane thermal conductivity (11.78 W m <superscript>-1</superscript>  K <superscript>-1</superscript> ), and had great potential in the thermal management of flexible electronics.<br /> (Copyright © 2022 Elsevier Ltd. All rights reserved.)

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