低温等离子体活化接枝以提高热解炭吸附效能的研究

STUDY ON IMPROVEMENT OF ADSORPTION PERFORMANCE OF PYROLYTIC CARBON BY LOW-TEMPERATURE PLASMA MODIFICATION AND GRAFTING

通过等离子体改性和接枝提高热解炭的吸附性能,同时探讨了改性热解炭的延时性和接枝率对于其吸附性能的影响,并利用扫描电子显微镜对热解炭、活化热解炭以及活化接枝热解炭的表面结构加以研究。实验结果表明,等离子体改性后的热解炭对亚甲基蓝的吸附性能有一定提高,但存在延时性问题,接枝丙烯酸后热解炭的吸附性能进一步提高。在等离子体活化后的1.5-2 h,接枝率为10%-15%时,活化接枝热解炭的吸附性能达到最佳。

This paper studies the adsorption performance of methylene blue（ MB） by pyrolytic carbon,aimed at improving the adsorption properties of pyrolytic carbon by plasma modification and grafting,at the same time,the influence on adsorption performance of timeliness and grafting rate was discussed. what＇ s more,we studed the surface structure of pyrolytic carbon,activated pyrolytic carbon and grafted activated pyrolytic carbon by scanning electron microscope. The results showed that plasma modification slightly improved the adsorption performance of pyrolytic carbon,but the issue of timeliness existed;grafting could further improve the adsorption capacity of pyrolytic carbon. Pyrolytic carbon showed the best adsorption performance when the grafting rate was up to 10% - 15% and activated after 1. 5 - 2 h.