Boron nitride nanosheets (BNNSs) with intrinsically ultra-high thermal conductivity have attracted more and more attention and various methods have been proposed to prepare BNNSs-based thermally conductive adhesives. In this work, a liquid phase shear exfoliation process was proposed to prepare BNNSs. BNNSs can be directly prepared by exfoliating h-BN particles dispersed in isopropanol at a controlled rotational speed range of 16,000–22,000 rpm and the maximum yield of BNNSs is up to 32.1%. After the BNNSs were modified with polydopamine (M-BNNSs), the dispersion performance of BNNSs in water was significantly improved. BNNSs were incorporated into a cellulose nanofiber-based adhesive, and the highly thermally conductive films were prepared by a flow-delay process. A tested in-plane thermal conductivity of up to 23.23 W·m·K and excellent mechanical properties are demonstrated and thermal infrared images provide a more visual representation of the high thermal conductivity and heat dissipation properties of the film, indicating the promising application of the film in the field of thermal conductivity.

中文翻译：

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高剪切剥离的氮化硼纳米片可用于高性能导热薄膜

具有本质超高导热性的氮化硼纳米片（BNNS）引起了越来越多的关注，并且已经提出了各种方法来制备基于BNNS的导热粘合剂。在这项工作中，提出了液相剪切剥离工艺来制备 BNNS。 BNNS可以通过在16,000-22,000 rpm的控制转速范围下分散在异丙醇中的h-BN颗粒直接剥离来制备，BNNS的最大收率高达32.1%。 BNNSs经聚多巴胺（M-BNNSs）修饰后，BNNSs在水中的分散性能显着提高。将BNNS加入到纤维素纳米纤维基粘合剂中，并通过流动延迟工艺制备高导热薄膜。经测试，面内导热系数高达23.23 W·m·K，具有优异的机械性能，热红外图像更直观地展示了薄膜的高导热系数和散热性能，表明该薄膜的应用前景广阔。导热薄膜。