摘要
以液态酚醛树脂为前驱体,正戊烷为发泡剂,吐温80为匀泡剂,在高压釜中通过卸压发泡的方法制备了酚醛树脂泡沫,然后将其经1000℃碳化后得到碳泡沫。研究结果表明,所得的典型碳泡沫样品是一种以无定形碳结构为主的轻质多孔碳材料,密度约为0.15g/cm3。碳泡沫的微结构可以通过调节卸压速率而得到有效控制,当卸压速率为0.05MPa/min时,可以得到孔洞相互贯穿、平均孔径约为300μm且分布较为均匀、接点完好,韧带光滑的多孔碳泡沫。
Phenolic foam resins were prepared in high-pressure autoclave by employing phenol formaldehyde resin as precursor,pentane as blowing reagent and Tween 80 as foam stabilizers. Then the phenolic foams were carbonized at 1000℃ to produce carbon foams. The results indicate that as-prepared carbon foams are porous amorphous carbon materials with very light bulk density of about 0.15g/cm^3. The microstructure of carbon foams could be controlled effectively by the depressurization rate of high-pressure autoclave. By controlling the depressurization rate of 0.05MPa/min,open celled carbon foams with uninterrupted network and uniform pore size of about 300μm could be obtained and the foams possess good microstructure such as lamellar framework,intact junctions and smooth ligaments.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2008年第1期108-110,共3页
Journal of Functional Materials
基金
国家自然科学基金资助项目(20473057
20673076)
上海市科委纳米专项资助项目(0652nm030)
关键词
碳泡沫
多孔材料
制备
酚醛树脂
卸压速蜜
carbon foam
porous materials
synthesis
phenolic resin
decompression rate
