Investigation on porous properties of carbon/carbon composite cryogels by using weighted arithmetic mean
Investigation on porous properties of carbon/carbon composite cryogels by using weighted arithmetic mean
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加权算术平均法研究碳/碳复合冷冻凝胶的多孔性能
DOI：
10.1016/j.micromeso.2016.05.005
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发表时间：
2016
影响因子：
5.2
通讯作者：
H. Tamon
中科院分区：
文献类型：
--
作者：
K. Kraiwattanawong;N. Sano;H. Tamon
采用棉纤维（CF）和间苯二酚甲醛（RF）溶胶合成复合冷冻剂。将其碳化制备碳/碳（C/C）复合冷冻机。间苯二酚与碳酸钠的摩尔比（R/C）、间苯二酚与蒸馏水的质量浓度（R/W）和CF与RF的质量比（CF/RF）分别为100和200 mol/mol、0.25和0.50 g/cm3和0.00 ~ 0.64 g/g。用氮吸附和扫描电镜对C/C复合材料进行表征。结果表明，碳/碳复合材料的介孔结构可以通过调节R/W或R/C比值来控制。C/C复合材料的平均微孔尺寸与普通碳低温材料相当。加权算术平均值适用于C/C复合材料的BET表面积和微孔表面积，对于高R/C比，其偏差约为21%；然而，它的低R/C比率很差。当CF/RF比小于0.40 g/g时，加权算术平均值对C/C复合冷体微孔体积的估计偏差约为20%。此外，加权算术平均值可以作为估计中孔体积的准则。
Cotton fibers (CF) and resorcinol and formaldehyde (RF) sol were used to synthesize composite cryogels. They were carbonized to prepare carbon/carbon (C/C) composite cryogels. In this work, the molar ratio of resorcinol to sodium carbonate (R/C), the mass concentration of resorcinol to distilled water (R/W) and the mass ratio of CF to RF (CF/RF) were changed as 100 and 200 mol/mol, 0.25 and 0.50 g/cm3and 0.00 up to 0.64 g/g, respectively. The C/C composites were characterized by nitrogen adsorption and scanning electron microscopy. The results showed that the mesopore structure of C/C composites could be controlled by the adjustment of an R/W or R/C ratio. Moreover, the mean micropore sizes of C/C composite cryogels were kept equivalently to those of normal carbon cryogels. The weighted arithmetic mean was well applied to the BET surface area and micropore surface area of C/C composites with the deviation of about 21% for the high R/C ratio; however, it poor for the low R/C ratio. The weighted arithmetic mean also estimated the micropore volume of C/C composite cryogels with the deviation of about 20% for the CF/RF ratio smaller than 0.40 g/g. Moreover, the weighted arithmetic mean can be used as a guideline to estimate the mesopore volume.
影响因子：
10.9
作者：
Kraiwattanawong, Kriangsak;Sano, Noriaki;Tamon, Hajime
通讯作者：
Tamon, Hajime
影响因子：
5.2
作者：
Kraiwattanawong, Kriangsak;Sano, Noriaki;Tamon, Hajime
通讯作者：
Tamon, Hajime