Carbon Fiber Synthesis from Isolated Lignin from Organosolv Fractionation of Bagasse and Eucalyptus
Apisada Tandhapongse, Nakorn Worasuwannarak and Navadol Laosiripojana
<p style="margin-bottom:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-cluster;line-height:normal;"><strong><span style="font-size:medium;font-family:Verdana, Geneva, sans-serif;">Abstract: </span></strong><span style="font-size:9.0pt;font-family:'Times New Roman',serif;"><span style="font-family:Verdana, Geneva, sans-serif;"><span style="font-size:medium;">The 50:50 w/w blended<strong> </strong>of organosolv lignin from the fractionation of bagasse and eucalyptus was successfully converted into carbon fiber. The properties of isolated lignin samples were studied and analyzed by elemental analysis (CHNO), Fourier transform infrared spectroscopic (FT-IR), Nuclear Magnetic Resonance Spectroscopy (H-NMR), thermogravimetric analysis (TGA), gel permeation chromatography (GPC). The images of carbon fibers were observed by scanning electron microscope (SEM). The blended organosolv lignin could be melt spun at 140°C to form lignin fibers. The collected fibers had medium brittleness. The fibers could stabilize at 250°C under air at rate 0.1°C per minute however, some of areas of the fibers were slightly fused. Then, the fibers were carbonized under nitrogen at 900°C. The received blended organosolv lignin based carbon fibers had carbon content at 82.84%. The carbon fibers had smooth surface with the diameter of 13-20 µm. The 50:50 w/w blended<strong> </strong>of organosolv lignin from bagasse fractionation and organosolv lignin from eucalyptus fractionation had average electrical resistivity of 3x10<sup>-2</sup> Ωm which had a potential to be used as semiconductor material.</span></span></span></p><span style="font-family:Verdana, Geneva, sans-serif;font-size:medium;"></span><p style="margin-bottom:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-cluster;line-height:normal;"><span style="font-size:medium;font-family:Verdana, Geneva, sans-serif;"> </span></p><span style="font-family:Verdana, Geneva, sans-serif;font-size:medium;"></span><p style="margin-bottom:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-cluster;line-height:normal;"><strong><span style="font-size:medium;font-family:Verdana, Geneva, sans-serif;">Keywords: </span></strong><span style="font-size:medium;font-family:Verdana, Geneva, sans-serif;">Lignin fiber, Fractionation, Organosolv lignin, Melt spinning, Carbon fiber.</span></p>