碳纳米泡沫
材料科学
复合材料
碳纤维
微观结构
碳化
抗压强度
发泡剂
煤
中间相
多孔性
扫描电子显微镜
化学
有机化学
复合数
液晶
光电子学
作者
Chong Chen,Elliot B. Kennel,Alfred H. Stiller,Peter G. Stansberry,John W. Zondlo
出处
期刊:Carbon
[Elsevier]
日期:2006-07-01
卷期号:44 (8): 1535-1543
被引量:278
标识
DOI:10.1016/j.carbon.2005.12.021
摘要
A series of carbon foams was developed by using low-cost precursors, such as coal, coal tar pitch and petroleum pitch. The properties of the resultant carbon foams cover a wide range, e.g., bulk density, 0.32–0.67 g/cm3, compressive strength, 2.5–18.7 MPa, isotropic and anisotropic microstructure, etc. The investigation of foaming mechanism and the relationship between properties and structure indicate that the fluidity and dilatation of the foaming precursors significantly affect the foaming performance and foam structure. Raw coal samples were foamed directly without pretreatment in this work. However, for the pitch based foaming precursor, a thermal pretreatment is necessary to adjust its thermoplastic properties to meet the foaming requirement. The mechanical strength of carbon foam is found to be related to not only the foam cell structure, but also the fluidity and anisotropic domain size of the foaming precursors. In addition, the micro and mesopore structure in carbon foam matrix was investigated by gas adsorption and it was found that it also affects the strength of carbon foam and is related to the fluidity of foaming precursor.
科研通智能强力驱动
Strongly Powered by AbleSci AI