Preparation of resorcinol-formaldehyde carbon cryogel microhoneycombs

被引:68
|
作者
Nishihara, H [1 ]
Mukai, SR [1 ]
Tamon, H [1 ]
机构
[1] Kyoto Univ, Dept Chem Engn, Nishikyo Ku, Kyoto 6158510, Japan
关键词
porous carbon; pyrolysis; adsorption; scanning electron microscopy; microstructure;
D O I
10.1016/j.carbon.2004.01.075
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The preparation of resorcinol-formaldehyde (RF) hydrogels by the sol-gel polycondensation of resorcinol (R) with formaldehyde (F) using sodium carbonate (C) as a basic catalyst and distilled water (W) was discussed. It was found that the ratios of resorcinol to formaldehyde (mol/mol; R/F), resorcinol to water (g/cm3; R/W) and resorcinol to catalyst (mol/mol; R/C) were 0.5, 0.2 and 100 respectively. The resulting hydrogels were washed five times with distilled water and placed into polypropylene tubes, which were filled with distilled water. These tubes were frozen at a constant rate of 20 cm/h, by dipping the tubes perpendicularly into a cold bath.
引用
收藏
页码:899 / 901
页数:3
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