Cellulose‐Derived Carbon Fibers with Improved Carbon Yield and Mechanical Properties. Issue 10 (5th July 2017)

• Record Type: Journal Article
• Authors: Spörl, Johanna M.; Beyer, Ronald; Abels, Falko; Cwik, Tomasz; Müller, Alexandra; Hermanutz, Frank; Buchmeiser, Michael R.
• Is Part Of: Macromolecular materials and engineering. Volume 302:Issue 10(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-07-05
• Subjects: biopolymers -- carbon fibers -- cellulose -- renewable resources -- structure–property relations; Plastics -- Periodicals; Polymers -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1002/mame.201700195
• Languages: English
• ISSNs: 1438-7492

Abstract

Abstract : High mechanical strength cellulose‐based carbon fibers (CFs) are prepared in a continuous process at comparably low temperatures and with high carbon yields. With a sulfur‐based carbonization agent, carbon yields of 37 wt% (83% of theory) and maximum tensile strengths and Young's moduli up to 2.0 and 84 GPa, respectively, are obtained at 1400 °C. Abstract : The manufacture of high mechanical strength cellulose‐based carbon fibers (CFs) is accomplished in a continuous process at comparably low temperatures and with high carbon yields. Applying a sulfur‐based carbonization agent, i.e., ammonium tosylate (ATS), carbon yields of 37% (83% of theory), and maximum tensile strengths and Young's moduli up to 2.0 and 84 GPa are obtained already at 1400 °C. For comparison, the use of the well‐known carbonization aid ammonium dihydrogenphosphate ((NH4 )H2 PO4 ), ADHP, is also investigated. Both the precursor and the CFs are characterized via elemental analysis, wide‐angle X‐ray scattering, Raman spectroscopy, scanning electron microscopy, and tensile testing. Thermogravimetric analysis coupled with mass spectrometry/infrared spectroscopy discloses differences in structure formation between ATS and ADHP‐derived CFs during pyrolysis.