发泡条件对中间相沥青基泡沫炭形成的影响  

EFFECT OF FOAMING CONDITIONS ON FORMATION OF MESOPHASE PITCH - BASED CARBON FOAMS

作　　者：安秉学[1] 李同起[1] 王成扬[1] 

机构地区：[1]天津大学化工学院绿色合成与转化教育部重点实验室,天津300072

出　　处：《炭素技术》2005年第6期1-4,共4页Carbon Techniques

摘　　要：以石油系中间相沥青为原料,在不同发泡时间和压力、温度为440℃时发泡制得生料泡沫炭,经过氧化、炭化等处理得到了具有均一孔结构的泡沫炭。利用SEM观察孔结构并测定体积密度和真密度的方法计算出不同制备条件下所得到的泡沫炭的孔隙率的数据,发现泡沫炭的孔隙率与孔径主要受发泡压力的影响,可利用改变发泡压力的方法控制泡沫炭的孔结构。通过对泡沫炭生料进行氧化、炭化等后处理可有效地提高产物泡沫炭的密度、孔隙率和强度等材料性能。Carbon foams with uniform cell structures were obtained from a mesophase pitch derived from petroleum pitch by varying the foaming time and pressure at 440℃ and by oxidizing and carbonizing the green carbon foams. The porosity of carbon foams was studied using scanning electron microcopy, bulk and real density analysis. It has been found that the porosity and cell size of carbon foams are mainly influenced by foaming pressure, implying the cell structure of carbon foams can be tuned or controlled to some degree by varying the foaming pressure. The oxidation and carbonization treatments help to increase the density, porosity and strength of carbon foams.

关 键 词：中间相沥青 泡沫炭 多孔材料 

分 类 号：TQ127.11[化学工程—无机化工]