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| 为了考察不同的炭材料在微波高温下的热稳定性的重要性，我们对不同材料制备的固体酸的热降解做了(TGA)在空气气氛下（Figures 11）, 在所有的TGA曲线中，在150度之前比较明显的失重归于于吸附水的蒸发，各种不同碳材料上磺酸基团的失重差不多在同一位置上发生，在210-230度左右在10度/min的加热速率下。但是我们从图中可以明显看出，BC-SO3H的热稳定性相对其他几种是最差的，这有可能是由于竹粉原料中的纤维素含量比其他几种纤维素含量都要低所致。 |
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★ ★ ★ ★ ★ ★ ★ ★ ★ ★
催化粪子(金币+10,VIP+0):Thanks`` 6-30 13:40
催化粪子(金币+10,VIP+0):Thanks`` 6-30 13:40
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为了考察不同的炭材料在微波高温下的热稳定性的重要性，我们对不同材料制备的固体酸的热降解做了(TGA)在空气气氛下（Figures 11）, 在所有的TGA曲线中，在150度之前比较明显的失重归于于吸附水的蒸发，各种不同碳材料上磺酸基团的失重差不多在同一位置上发生，在210-230度左右在10度/min的加热速率下。但是我们从图中可以明显看出，BC-SO3H的热稳定性相对其他几种是最差的，这有可能是由于竹粉原料中的纤维素含量比其他几种纤维素含量都要低所致。 Thermal degradation of solid acid was analyzed using various materials in air atmosphere (Figures 11) in order to investigate thermal stability of different carbon materials under high temperature of microwave. Among all of TGA curves, evaporation of the adsorbed water was the right reason that caused weight loss obviously before 150 degrees, and then weight loss position in sulfonic group of different carbon materials was almost same when heating occurred at 210-230 degrees running at 10 degrees per min. As figure was shown clearly, BC-SO3H relative thermal stability is the worst among counterparts, likely, due to the cellulose concentration in bamboo cellulose powder as raw material was lower than others. |
2楼2009-06-28 16:17:18
★ ★ ★ ★ ★ ★ ★ ★ ★ ★
催化粪子(金币+10,VIP+0):Perfect!! 6-30 13:40
催化粪子(金币+10,VIP+0):Perfect!! 6-30 13:40
| In order to investigate different carbon materials under high temperature in the microwave the importance of thermal stability, we prepared a variety of materials of the thermal degradation of solid acid to do the (TGA) in air atmosphere (Figures 11), in all of the TGA curve, 150 degrees in the more obvious before the weight loss attributed to the evaporation of the Adsorbed Water, all kinds of different carbon materials on the weight loss of sulfonic acid group is almost in the same location occurred in the 210-230 degrees in 10 degrees / min heating rate . From the figure we can clearly see, BC-SO3H relative thermal stability is the worst among several other, which may be due to the bamboo cellulose powder raw materials in the cellulose content than the content of several other lower by addressed. |
3楼2009-06-29 09:22:04