AR沥青的流变性对炭素泡沫材料结构的影响  

Effect of Rheological Properties of AR Pitch on Pore Structure of Carbon Foam

作　　者：许德平[1] 闵振华[1] 曹敏[2] 张书[1] 王永刚[1] 

机构地区：[1]中国矿业大学化学与环境工程学院,北京100083 [2]河南理工大学材料科学与工程学院,河南焦作454000

出　　处：《中国矿业大学学报》2008年第1期57-61,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50274071)

摘　　要：为探索优质炭素泡沫材料的制备条件，以AR（Aromatic Resin）沥青为原料，高压反应釜自发泡的方法制备泡沫炭基体，然后在1050℃炭化、2500℃石、墨化得到炭素泡沫材料．高温旋转式黏度计测定和评价了AR沥青的流变性能；扫描电镜、偏光显微镜对炭泡沫的孔胞结构进行了表征并与AR沥青的流变性能关联．结果表明，在外加压力为2．0MPa，温度为400～450℃时，AR沥青的黏度较低，对温度的敏感性较小，制得的炭素泡沫材料孔胞分布较窄（380～520μm），孔径较大（462μm），孔壁较薄，开孔较多，韧带排列规整，孔壁微裂纹较少，利于制备低密度、高压缩强度和高热导率的炭素泡沫材料．A carbon foam matrix was prepared from aromatic resin（AR） pitch in a autoclave and then was carbonized at 1 050 ℃ and graphitized at 2 500 ℃ to form carbon foam. The rheological properties of AR pitch were investigated by high temperature rotary viscometer. The pore structure and morphology of carbon foam were characterized using scanning electrical microscope （SEM） and polarizing microscope. The results show that carbon foam exhibited low viscosity, narrower pore distribution （380-520 μm）, greater pore size （462 μm）, thinner cell wall, more open-cells, better ligament and fewer cracks on cell wall by treatment of AR pitch at 2.0 MPa and 400-450 ℃. The carbon foam mentioned above is of low bulk density, high compressive strength and thermal conductivity.

关 键 词：流变性 炭素泡沫 温度 孔结构 

分 类 号：TQ127.1[化学工程—无机化工]