AUTHOR=Kong Xiangdong , Li Linhong , Li Maohua , Xia Juncheng , Wang Yandong , Wei Xianzhe , Xiong Shaoyang , Gong Ping , Pan Zhongbin , Wu Xinfeng , Cai Tao , Nishimura Kazuhito , Lin Cheng-Te , Jiang Nan , Yu Jinhong TITLE=Two-Dimensional Hexagonal Boron Nitride Nanosheets as Lateral Heat Spreader With High Thermal Conductivity JOURNAL=Frontiers in Materials VOLUME=8 YEAR=2022 URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2021.817061 DOI=10.3389/fmats.2021.817061 ISSN=2296-8016 ABSTRACT=

A highly thermally conductive heat spreader for applications in electronic devices is becoming increasingly demanding, and therefore the removal of excess heat requires an efficient heat dissipating device. Boron nitride nanosheets (BNNSs) were prepared as thermally conductive fillers using hexagonal boron nitride (h-BN) powder as raw material by a water exfoliation method. A composite film was prepared by vacuum filtration using cellulose nanofibers (CNFs) as the substrate with an in-plane thermal conductivity (TC) of 82.4 W m−1 K−1, thermal conductivity enhancement increasing by 9,486% compared to pure cellulose film. Thus, CNF/BNNS composite films are promising as effective thermal interface materials (TIMs) in electronic devices and electronic component applications.