预氧化时间对中间相沥青及其泡沫炭的影响  

Effects of Pre-oxidization Time on the Mesophase Pitch and Its Carbon Foams

作　　者：张红波[1] 肖锋[1] 李万千[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《湖南大学学报（自然科学版）》2010年第10期67-71,共5页Journal of Hunan University:Natural Sciences

基　　金：'973'国家重点基础研究发展规划项目(2006CB600907)

摘　　要：对AR中间相沥青进行300℃预氧化处理,获得氧化沥青,以AR中间相沥青和氧化沥青为原料制备泡沫炭,采用氮/氧、碳/硫分析仪和热分析仪分析原料的元素含量和热分解过程,采用扫描电子显微镜观察泡沫炭的微观形貌,研究了300℃预氧化处理对AR中间相沥青元素和热重的影响机制.结果表明,AR中间相沥青经300℃预氧化2 h,4 h和6h后,沥青中氧元素含量由原来的0.85%增加到6.60%,10.47%和11.31%.AR中间相沥青经预氧化后获得了孔径较小的泡沫炭材料.当预氧化时间为6 h时,炭化和石墨化泡沫炭的压缩强度分别为12.07 MPa和9.06 MPa.Oxidation pitches were prepared from AR mesophase pitch pre-oxidized for different time at 300 ℃.Carbon foams were produced with AR mesophase pitch and the oxidation pitches.Element content and thermal decomposition processes of the pitches were analyzed with Nitrogen/oxygen and Carbon/sulfur analyzer and thermal analysis instrument.The microstructure of carbon foams was observed with SEM.The effects of pre-oxidization at 300℃ on composition and TG of AR mesophase pitch were investigated.After pre-oxidizing for 2 h,4 h and 6 h at 300 ℃,the content of oxygen increased from 0.85% to 6.60%,10.47% and 11.31%.Carbon foams had lesser aperture when the oxidation pitches were used as the precursor.The compressive strengths of carbonized and graphitized carbon foams were 12.07 MPa and 9.06 MPa when pre-oxidizing for 6 h at 300 ℃.

关 键 词：泡沫炭 AR中间相沥青 预氧化 压缩强度 

分 类 号：TQ127[化学工程—无机化工]