Preparation of flat porous carbon films from paper-thin wood shavings and control of their mechanical,electrical and magnetic properties |
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| Affiliation: | 1. Research Institute for Science and Engineering, Waseda University, Tokyo 169-8555, Japan;2. Durart Company, Tokorozawa-shi, Saitama 359-1141, Japan;3. Department of Applied Chemistry, Waseda University, Tokyo 169-8885, Japan;1. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;2. Fast-growing Tree & Agro-fibre Materials Engineering Center, Nanjing 210037, China;1. Chemical Engineering Department, National Institute of Technology, Warangal 506004, India;2. Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400109, India;1. College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350116, China;2. School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing, 100191, China;2. Faculdade de Educação, Artes e Humanidades, Departamento do Ensino de Química, Universidade Nacional Timor Lorosa’e, Rua Jacinto Cândido, Dili, Timor-Leste |
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| Abstract: | A method for preparing flat porous carbonized films (FPCFs) by carbonizing paper-thin wood shavings was developed, and their structures and properties were investigated. The FPCFs were binder-free and had horizontal honeycomb structures consisting of macropores of 2–50 μm arising from tracheids and pittings. The FPCFs with approximate dimensions of 120 mm × 104 mm × 113 μm showed some flexibility. They were effectively reinforced and became twistable by introducing styrene–butadiene rubber (SBR) into the macropores via impregnation. The SBR-modified FPCFs carbonized at 1023 K retained electrical conductivity on the order of 10−3 S/m with the inclusion of SBR concentrations up to 15 mg/cm2. The electrical conductivity of FPCFs carbonized at 773 K changed from nonconductive to 10−2 S/m by impregnating the macropores with electrically conductive carbon paste or to 105 S/m with Cu chemical plating. The FPCFs became responsive to a magnetic field by impregnating the macropores with a magnetic fluid or by creating ferrites through chemical reactions within the macropores. |
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