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Effect of the composition on the morphology and mechanical properties of nanoporous carbon monoliths derived from phenol–formaldehyde/poly(methyl methacrylate) blends

Published online by Cambridge University Press:  10 November 2015

Xiaopeng Wang ,
Zhenhua Luo ,
Fenghua Chen ,
Li Ye ,
Hao Li  and
Tong Zhao
Xiaopeng Wang
Affiliation:
High Technology Materials Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China; and University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
Zhenhua Luo*
Affiliation:
High Technology Materials Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China; and University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
Fenghua Chen
Affiliation:
High Technology Materials Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China; and University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
Li Ye
Affiliation:
High Technology Materials Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China; and University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
Hao Li
Affiliation:
High Technology Materials Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China; and University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
Tong Zhao*
Affiliation:
High Technology Materials Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China; and University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

Nanoporous carbon monoliths with different pore structures were obtained by carbonizing cured phenol–formaldehyde (PF) resin/poly(methyl methacrylate) (PMMA) blends. The effect of the molecular weight of PMMA, reaction activity of PF, and content ratio of compositions on the pore structure of carbon monoliths was systematically investigated, with emphasis on controlling the morphology of the nanostructure and pore size distribution. Nanostructures were an important factor in determining the compressive strength of porous carbon monoliths. The relationship between the nanoporous structure of carbon monoliths and compressive strength was revealed. Co-continuous pores provided escape channels for those volatile gases produced in the carbonization process to escape, reducing inner stress of the carbon materials. During compressive loading, co-continuous pores could also help to scatter and absorb the stress and energy. Porous carbon monoliths with a compressive strength of 34 MPa were obtained, and the compressive strength increased by 580% compared with that of carbon monoliths obtained from pure PF.

Keywords

nanostructureporositystrength
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 22 , 27 November 2015 , pp. 3412 - 3422
Copyright
Copyright © Materials Research Society 2015 

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