关键词:

废轮胎, 热解炭黑, 改性, 表面分析

Abstract:

Modification of pyrolytic carbon black (CB_p) was carried out by acid washing (washed carbon black, WCB_p) and then added with stearic acid (stearic acid modified WCB_p, SWCB_p).These three carbon black samples were characterized by using X-ray fluorescence spectroscopy (XRF), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS)，etc.The CB_p is composed of carbon particles in micron scale containing a large proportion of ash.After acid washing, the ash content decreases from 20.46% to 8.65%.Both the WCB_p and the SWCB_p have a higher BET specific surface area and a higher volatile content than CB_p.As analyzed by XPS, the CB_p surface is covered by carbonaceous deposits, which makes the surface polarity decrease and the oil-affinity increase.Upon acid washing and stearic acid modification, part of the polar functional groups is exposed, and there contains more C—OR,C—OEt, COOR/COOH groups in SWCB_p.

Key words:

废轮胎, 热解炭黑, 改性, 表面分析