Preparation of Hollow/Porous Carbon Nanofibers from PAN with High Molecular Weight

Abstract:

In this paper, the hollow or porous carbon nanofibers based on the PAN with high molecular weight were manufactured through concentric electrospinning. The PAN terpolymers with the viscosity-average molecular weight of 30 kDa were synthesized via aqueous precipitation polymerization. Then the prepared PAN was dissolved in DMF to afford the shell. Two kinds of solutions, silicone oil and the 10% PVP DMF solution, were used as the core. After the concentric electrospinning, the obtained core-shell PAN nanofibers exhibit the different morphology. Compared with the 10% PVP DMF solution as the core, the silicone oil as the core led to the greater and more uneven in diameter. After the oxidative stabilization and carbonization, the PAN based carbon nanofibers (CNFs) showed the obvious hollow cores no matter the silicone oil or 10% PVP DMF solution is in core. When the silicone oil is in core, the profiles of the PAN based CNFs reveal the better fibrous shape and thinner diameter. Furthermore, a mixture of PAN and PMMA with the molecular ratio of 1:1 in shell and the 10% PVP DMF solution in core were also concentrically electrospun. FESEM reveals that the addition of PMMA made the nanofibers more even and thinner diameters. After carbonization, the resulted PAN based CNFs show the porous cross-section.

• Periodical: Advanced Materials Research (Volumes 912-914)
• Pages: 277-280
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.912-914.277
• Online since: April 2014
• Authors: Shu Feng Li*, Shao Ling Chen, Fei Yan Deng, Bo Wen Cheng
• Keywords: Carbon, Concentric Electrospinning, High Molecular Weight, Nanofiber, pan

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