Preparation and properties of boron nitride nanosheets/cellulose nanofiber shear-oriented films with high thermal conductivity |
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| Affiliation: | 1. Institute of Applied Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230088, PR China;2. University of Science and Technology of China, Hefei, 230026, PR China;3. Key Laboratory of Photovoltaic and Energy Conservation Materials, Chinese Academy of Sciences, PR China;1. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;2. College of Materials Science and Engineering, Hunan University, Changsha 410082, China;1. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;2. School of Advanced Manufacturing & Mechanical Engineering, University of South Australia, Mawson Lakes, SA 5095, Australia;3. School of Mechanical, Materials, Mechatronics and Biomedical Engineering, University of Wollongong, Wollongong 2522, Australia;4. Shanghai LEVSON Group Co., Ltd., Shanghai, 200444, China;5. Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Wuhan Institute of Technology, Wuhan 430205, China;1. School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei 230026, China;2. Division of Advanced Nanomaterials, Key Laboratory of Nanodevices and Applications, Joint Key Laboratory of Functional Nanomaterials and Devices, CAS Center for Excellence in Nanoscience, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, China;3. Division of Nanomaterials, Suzhou Institute of Nano-Tech and Nano-Bionics, Nanchang, Chinese Academy of Sciences, Nanchang 330200, China;4. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;1. School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, PR China;2. State Key Laboratory of Advanced Transmission Technology, Global Energy Interconnection Research Institute, Beijing 102211, PR China;3. College of Material and Chemical Engineering, University of Hainan, Hainan 570228, PR China;4. State Key Laboratory of Electrical System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, PR China;1. The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi''an 710072, PR China;2. Division of Advanced Nanomaterials, Key Laboratory of Nanodevices and Applications, CAS Center for Excellence in Nanoscience, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, PR China;3. Department of Materials Science, Fudan University, 220 Handan Road, Shanghai 200433, PR China;1. Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Natural and Applied Science, Northwestern Polytechnical University, Xi’an 710129, PR China;2. Institute of Materials for Energy and Environment, Growing Base for State Key Laboratory, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China |
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| Abstract: | A highly thermally conductive boron nitride nanosheets/cellulose nanofiber (BNNS/CNF) oriented film was prepared by doctor blading method via mechanical shear-induced orientation. The SEM images for cross-sectional parts showed that BNNS were well aligned within the film, forming a good layered structure. The XRD results further confirmed the high orientation effect of BNNS. Due to the excellent thermal stability of BNNS and its good physical barrier effect on the matrix after the orientation treatment, the thermal stability of shear-oriented films was largely improved. Resulting from the shear-induced orientation, BNNS were closely contacted with each other, forming a good thermally conductive pathway within the CNF matrix. Thus the influence of the interfacial thermal resistance was dramatically reduced, and the thermal conductivity of shear-oriented films increased in proportion to filler loading. With 50 wt% BNNS, the thermal conductivity of the shear-oriented film reached 24.66 W/(m·K), which exhibited 1106% enhancement compared to the pure CNF. |
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| Keywords: | Boron nitride nanosheets Cellulose nanofiber Shear induced orientation Thermal conductivity |
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