Preparation and Characterization of Modified Soda Lignin with Polyethylene GlycolReport as inadecuate


Preparation and Characterization of Modified Soda Lignin with Polyethylene Glycol


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Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China





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Abstract Soda lignin does not have thermal flowing characteristics and it is impossible for it to be further thermally molded. To achieve the fusibility of soda lignin for fiber preparation by melt-spinning, an effective method for soda lignin modification was conducted by cooking it with polyethylene glycol PEG 400 at various ratios. The higher the ratio of PEG that was used, the more PEG molecular chains were grafted at the alpha carbon of the soda lignin through ether bonds, resulting in lower thermal transition temperatures and more excellent fusibility. The modified soda lignin with a weight ratio of lignin to PEG of 1:4 exhibited a relative thermal stability of molten viscosity at selected temperatures. Thereafter, the resultant fusible soda lignin was successfully melt-spun into filaments with an average diameter of 33 ± 5 μm, which is smaller than that of some industrial lignins. Accordingly, it is possible to utilize soda lignin to produce fibrous carbonaceous materials. View Full-Text

Keywords: soda lignin; polyethylene glycol; melt-spinning; fibers soda lignin; polyethylene glycol; melt-spinning; fibers





Author: Fangda Zhang, Jian Lin * and Guangjie Zhao

Source: http://mdpi.com/



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