基于全纤维素纳米纤维辅助剥离的氮化硼纳米片用于热管理纳米复合薄膜。
Holocellulose nanofibrils assisted exfoliation of boron nitride nanosheets for thermal management nanocomposite films.
机构信息
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Department of Food Science and Agricultural Chemistry, McGill University, 21111 Lakeshore, Ste Anne de Bellevue, Quebec H9X 3V9, Canada.
出版信息
Carbohydr Polym. 2022 Sep 1;291:119578. doi: 10.1016/j.carbpol.2022.119578. Epub 2022 May 6.
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 K), and had great potential in the thermal management of flexible electronics.
通过环保的全纤维素纳米纤维（HCNFs）辅助超声处理在水中剥离出高质量的氮化硼纳米片（BNNSs）。所得的 H-BNNSs 具有高产率（23.4%）、表面缺陷少、高纵横比（~134）和在水中的优异分散性（Zeta 电位，-53.5 mV）。此外，H-BNNSs 通过液态金属（镓，Ga）主导的界面工程进行功能化，并与纤维素纤维组装成 Ga@H-BNNSs 填充纳米复合材料薄膜。由于采用了精心设计的界面工程，所得的纳米复合材料薄膜表现出了出色的综合性能，特别是在面内热导率（11.78 W m K）方面表现优异，在柔性电子产品的热管理方面具有很大的应用潜力。
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