Fabrication of Fibers of Resorcinol/Formaldehyde Gel by Electrospinning toward the Formation of Mesoporous Carbon Fibers
Carbon fibers having mesoporous structure is a promising material for several applications, including advanced catalyst support, adsorbent and filtration. Mesoporous carbon with controllable pore size can be formed via the pyrolysis of resorcinol/formaldehyde (RF) gel. In this work, electrospinning technique was applied to fabricate the RF-gel into fibers. The RF-gel was prepared by the sol-gel polycondensation of resorcinol (R) and formaldehyde (F) with sodium carbonate (C) as basic catalyst. Upon the application of high electrical potential, in the range of 10-22 kV, the RF mixture which was supplied to the nozzle at a flow rate of 0.8 ml/h was ejected toward the collector. Morphology and size of the obtained product were found to depend upon the conditions for RF-gel preparation, namely R/F molar ratio, aging period and aging environment, and upon the electrospinning conditions such as the applied potential and nozzle-to-collector distance. The RF-gel prepared by using R/F molar ratio of 0.5 that was aged in 8％-relative humidity (RH) environment was found to produce fibers with the average diameter of 1-3 冚m. As the aging period was increased, the average diameter of the fibers was increased. For the RF-gel aged under high humidity (e.g. 75％ and 100％ RH), the products were found to be mostly spherical particles deposited on the collector. After pyrolysis, all products retained the same morphology yet the RF-gel was converted into carbon.
Resorcinol/formaldehyde gel Fibers Electrospinning Mesoporous
Panitnart Ubollers Pitt Supaphol Varong Pavarajarn
Center of Excellence in Particle Technology,Faculty of Engineering,Chulalongkorn University,Bangkok, The Petroleum and Petrochemical College and The Center for Petroleum,Petrochemical and Advanced Mate
国际会议
西安
英文
537-544
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）