In situ preparation and mechanical properties of CNTs/MCMBs composites |
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| Affiliation: | 1. School of Printing and Packaging Engineering, Xi’an University of Technology, No. 5 South Jinhua Road, Xi’an 710048, Shaanxi, PR China;2. School of Materials Science and Engineering, Northwestern Polytechnical University, No. 127 West Youyi Road, Xi’an 710072, Shaanxi, PR China;1. Institute of Solid State Chemistry and Mechanochemistry SB RAS, Kutateladze str. 18, Novosibirsk 630128, Russia;2. Novosibirsk State University, Pirogova str. 2, Novosibirsk 630090, Russia;3. Lavrentyev Institute of Hydrodynamics SB RAS, Lavrentyev Ave. 15, Novosibirsk 630090, Russia;4. Novosibirsk State Technical University, K. Marx Ave, 20, Novosibirsk 630073, Russia;5. Institute of Automation and Electrometry SB RAS, Koptyug Ave. 1, Novosibirsk 630090, Russia;1. College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China;2. College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China;1. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;2. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;3. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;4. Center for Combustion Energy, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;5. City Key Laboratory of Thermal Management Engineering and Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China |
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| Abstract: | By adding carbon nanotubes (CNTs) into medium temperature coal tar pitch, mesocarbon microbeads (MCMBs) were obtained via thermal condensation, then CNTs/MCMBs composites were in situ prepared using compression molding. The morphology, structure and mechanical properties of CNTs/MCMBs composites were characterized by optical microscope, digital camera, scanning electron microscope (SEM) and mechanical test machine. Results showed that CNTs were used as the nucleating agent and could inhibit the growth and coalescence of MCMBs. The optical textures of CNTs/MCMBs composites showed similar characteristics to the thermal condensation products from coal tar pitch with CNTs. The mass ratio of CNTs to coal tar pitch played an important role in the mechanical properties of CNTs/MCMBs composites. The density and bending strength of CNTs/MCMBs composite first increased and then decreased with the increase of the proportion of CNTs. When the proportion of CNTs was 5 wt%, the density of the composite reached the maximum (1.76 g/cm3). In addition, the bending strength of the composite reached the maximum (79.6 MPa) as adding 2 wt% CNTs into coal tar pitch. |
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