Mechanical and dielectric properties of mesoporous carbon microsphere/phenolic resin composites

ZHOU Jian-guo; ZHU Xiao-lei; ZHANG Li; QIAO Wen-ming; LONG Dong-hui; LING Li-cheng

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Article Navigation > New Carbon Mater. > 2016 > 31(3): 301-306

ZHOU Jian-guo, ZHU Xiao-lei, ZHANG Li, QIAO Wen-ming, LONG Dong-hui, LING Li-cheng. Mechanical and dielectric properties of mesoporous carbon microsphere/phenolic resin composites. New Carbon Mater., 2016, 31(3): 301-306.

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Mechanical and dielectric properties of mesoporous carbon microsphere/phenolic resin composites

1.
State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2.
China National Chemical Corporation, Beijing 100080, China

Funds: National Science Foundation of China (21576090, 51302083, 51172071);Fundamental Research Funds for the Central Universities and Shanghai Rising Star Program (15QA1401300).

Received Date: 2016-05-03
Accepted Date: 2016-06-28
Rev Recd Date: 2016-06-01
Publish Date: 2016-06-28

Abstract

Abstract

Mesoporous carbon microspheres (MCMs) were prepared by a scalable spray-drying method using resorcinol-formaldehyde resin as the carbon precursor. The MCMs were used as low density fillers of phenolic resin matrix composites for microwave absorption. They were coated with polyvinyl alcohol (PVA) before being added to the phenolic resin and the composites were prepared by the hot-pressing method. Results showed that the MCMs had a narrow particle size distribution of 1-10 μm and developed mesopores with a total pore volume of 3.0 cm³/g. The PVA coating densified the surface of the MCMs to form a core-shell structure while retaining the mesopores. The density of the composites decreased from 1.36 to 1.12 g/cm³ by increasingthe MCM content from 0 to 10 wt%. The corresponding dielectric constant in the frequency range of 102-107 Hzincreased from 4.0-3.6 to 10.4-9.1. The compressive strength exhibited a maximum of 168 MPa with a MCM content of 5 wt%.The low density, high mechanical strength and high dielectric constant of the composites suggests that the MCMs are ideal fillers for phenolic resin-based microwave absorption materials.
- Mesoporous carbon microspheres,
- Composites,
- Mechanical properties,
- Dielectric properties

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References(19)

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