Abstract A one-step exfoliation and functionalization method using ball milling was employed to prepare an amine-group-treated hybrid filler (BA-NH2) comprising boron nitride (BN) and aluminum nitride (AlN). A thermal conductive film (CNF/BAH-NH2) was then fabricated using the hybrid filler (BA-NH2) and a cellulose nanofiber (CNF) matrix via vacuum filtration and hot-press processing. After treating the surfaces of each of the fillers, the hybrid filler exhibited better dispersion in the film matrix by hydrogen bonding interactions for improved interfacial adhesion between the filler and matrix. Moreover, the treated AlN particles deposited on the surface-treated BN assist in the formation of heat-transfer paths along the through-plane direction. Hence, the thermal conductivity increased from 0.5 W m−1 K−1 (neat CNF film) to 5.93 W m−1 K−1 (50 wt% filler loading), which was a 1092% enhancement compared with the neat CNF film, and the thermal stability was enhanced by 27% (62.5 °C). Moreover, favorable mechanical properties such as tensile stress of 35.93 MPa and elongation at break of 4.09% were observed for the film.

中文翻译：

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具有处理过的包含氮化硼和氮化铝的混合填料的纸状纤维素薄膜的增强的平面热导率

摘要 采用球磨一步剥离和功能化的方法制备了含氮化硼（BN）和氮化铝（AlN）的胺基处理杂化填料（BA-NH2）。然后使用混合填料 (BA-NH2) 和纤维素纳米纤维 (CNF) 基质通过真空过滤和热压加工制造导热膜 (CNF/BAH-NH2)。在处理每种填料的表面后，混合填料通过氢键相互作用在膜基体中表现出更好的分散性，从而改善了填料和基体之间的界面粘合。此外，沉积在表面处理过的 BN 上的处理过的 AlN 颗粒有助于沿通平面方向形成传热路径。因此，热导率从 0.5 W m-1 K-1（纯 CNF 膜）增加到 5。93 W m-1 K-1（50 wt% 填料负载），与纯 CNF 薄膜相比提高了 1092%，热稳定性提高了 27%（62.5 °C）。此外，该薄膜还观察到良好的机械性能，如 35.93 MPa 的拉伸应力和 4.09% 的断裂伸长率。