添加氧化石墨烯对煤沥青成焦行为的影响.pdfVIP

　 第38卷第7期 煤　 　 炭　 　 学　 　 报 Vol.38　 No.7　 　 2013年 7月 JOURNAL OF CHINA COAL SOCIETY July　 2013　 - - - 　 　 文章编号:0253 9993(2013)07 1260 05 添加氧化石墨烯对煤沥青成焦行为的影响 蔡秋红,林起浪,陈智明,马志超 (福州大学 材料科学与工程学院,福建 福州　 350108) 摘　 要:采用TEM观察添加异氰酸苯酯改性的氧化石墨烯(iGONSs)的微观结构,采用TGA研究添 加iGONSs前后煤沥青的热解行为,采用偏光显微镜研究添加iGONSs前后煤沥青焦化产物的光学 组织,采用XRD研究添加 iGONSs 对煤沥青焦化产物微晶结构的影响。 研究表明,添加 iGONSs 后,煤沥青的热分解温度变大,热失重率变小,其耐热性能变好;iGONSs对煤沥青碳质中间相的形 成起到成核和抑制生长的作用,这使得最终焦化产物的光学各向异性单元尺寸变小;随着iGONSs 添加量的增加,焦化产物的微晶层间距增大,平均微晶高度和平均微晶宽度减小。 关键词:煤沥青;氧化石墨烯;焦化;光学组织 中图分类号:TQ522.65　 　 　 文献标志码:A Effect of graphene oxide nanosheets addition on the coking behavior of coal-tar pitch CAI Qiu-hong,LIN Qi-lang,CHEN Zhi-ming,MA Zhi-chao (College of Materials Science and Engineering,Fuzhou University,Fuzhou　 350108,China) Abstract:Microstructure of the addition of phenyl isocyanate-modified graphene oxide nanosheets(iGONSs) was ex- amined using transmission electron microscope(TEM) and physical adsorption analyzer,and thermal behaviors of the coal-tar pitch with different iGONSs contentswere investigated by thermogravimetric analysis(TGA).In addition,the optical texture and micro-crystal structure of resultant coke of the coal-tar pitch with different iGONSs contents were characterized using reflected polarized light microscopy and X-ray diffraction(XRD),respectively.The results show thatwith the addition of iGONSs,thethermal stability of coal-tar pitch increases,theweight losstemperature and coke value are improved.The addition of iGONSs plays a role in both the nucleation and the growth inhibition of carbona- ceous mesophase,leading to a decrease