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为高值化利用棕榈纤维,在不同活化温度下以磷酸为活化剂制备棕榈活性碳纤维,通过扫描电镜、氮气吸附-脱附、压汞法和亚甲基蓝吸附法对其孔隙结构和吸附性能表征,结果表明:(1)随着活化温度升高,棕榈纤维表面受活化剂侵蚀而引起组织结构破坏,产率逐渐降低;(2)随着活化温度升高,活性碳纤维中孔含量减少,有利于微孔的产生,导致比表面积的增加;随着活化温度继续增加,部分微孔扩大为中孔,引起中孔增多;(3)棕榈纤维的亚甲基蓝吸附能力较活化处理前有明显提高,并与活性碳纤维中孔含量变化呈正相关。
In order to increase the value of the use of palm fiber, phosphoric acid as activator at different activation temperature prepared palm activated carbon fiber, characterized by scanning electron microscopy, nitrogen adsorption - desorption, mercury porosimetry and methylene blue adsorption method of its pore structure and adsorption properties, the results The results showed that: (1) As the activation temperature increased, the surface of the palm fiber was damaged by the activator and the structure was destroyed, and the yield decreased gradually. (2) With the increase of the activation temperature, the content of the mesopores in the activated carbon fiber decreased, (3) The adsorption capacity of methylene blue of palm fiber was significantly increased compared with that before activation, and its activity was higher than that before activation Carbon fiber in the hole content was positively correlated.