PAN基活性碳纤维的研制及吸附性能

<正> 活性碳纤维(ACF)是在碳纤维的基础上发展起来的又一新品种,它是纤维经碳化后,再用氧化性气体进行活化而制得。它具有比表面积大、微孔发达吸附性能好、吸脱附速度快等优点。作为吸附剂可用于环境保护、喷漆、医疗用品、水的纯化、溶剂回收等方面。 本文采用的原纤是PAN纤维,其单体克分子组成为:丙烯腈:丙烯酸甲酯:衣康酸

PREPARATION OF ACTIVATED CARBON FIBER (ACF) CONTAINING NITROGEN ATOM AND IT'S ABSORPTION BEHAVIOR

Polyacrylonitrile (PAN) fiber was activated at various temperature for varying lengths of time in different flux of CO2. In this experiment, it is good for activation that the tmperature is 850℃ and periods of time 2 hrs, flux of CO2 4 1/min. In this way the ACF which has a specific surface area 900-1000 m2/g and absorbs CCl4 60-70% (in weight) was obtained. It has been found that the PAN ACP posses same properties as viscose ACF made in Japan through the determination of absorption, desorption and pore diameter distribution. In addition, the pore diameter distribution is narrow and the peak of distribution is about 30 A. It has larger specific surface, enabling easy absorption and quick desorption as compared with the conventional activated carbon. It is being noticed as a new absorbent.