Abstract
Phenolic-based carbon foams with controllable pore structure and high compressive strength were prepared by foaming of resin solution under the pressure of 4MPa and then carbonizing. Results showed that the average pore size of carbon foam ranging from 20 to 180nm can be controlled by changing the resin concentration. The nanometer pore structure resulted in significant improvement of compressive strength and thermal insulation properties of the carbon foams. Carbon foam with bulk density of 0.73g/cm3, average pore size of 20nm, compressive strength of 98.3MPa and thermal conductivity of 0.24W/mK was obtained.
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