远程氮等离子体改性活性炭纤维及其吸附性能研究

采用远程等离子体方法对活性炭纤维(ACF)进行表面功能化改性。研究了放电参数(放电时间、氮气压力、放电功率)与远程位置对ACF减重率及吸附性能的影响。结果表明，远程氮等离子体中的电子、离子对试样的刻蚀作用被抑制，远程等离子体改性后的ACF比未改性的ACF以及放电区的吸附剂对结晶紫的去除效果要好。ACF经过远程氮等离子体改性后，表面出现羧基，增加了其表面酸性含氧官能团，从而增强了对碱性染料结晶紫的吸附能力。当氮气压力10Pa、放电功率60W、放电时间100s时，在远程区80cm处经改性后的ACF的吸附性能最佳。

Research on Modification of Activated Carbon Fiber by Remote Nitrogen Plasma and Its Adsorptive Capacity

Remote plasma was used in the modification of surface functional group of activated carbon fiber (ACF). The effects of discharge parameters, such as discharge time, discharge power, discharge distance and nitrogen pressure, on the weight and adsorptive capacity of ACF were studied. The experimental results show that the etching effects of electrons and ions in remote nitrogen plasma on sample are inhibited; ACF modified by remote plasma has higher removing efficiency for methyl violet (basic dye) than non - modified ACF and the adsorbing agents in plasma generation region. The appearance of carboxyl groups on the surface of modified ACF, which increases the amount of acidic oxygen functional groups, improves its adsorptive capacity for methyl violet. The optimum conditions for ACF modification are as follows:nitrogen pressure 10 Pa,discharge power 60 W,discharge time 100 s,discharge distance 80 cm.