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Carbon films were prepared from polyimide (PI) films by heat-treatment at low temperature in air. Porous pyrolyzed films were obtained by maintaining the PI films at 500∼560°C for 10min in air. It was shown that heat-treatment in air is advantageous for the production of porous films with low energy and low cost. Furthermore, the pore size of the films was distributed between 1nm and 6nm, having not...
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