Studying on the Soda and Dioxane Lignin of Bagasse using Derivatization Followed by Reductive Cleavage (DFRC) | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| Article 4, Volume 29, WINTER 4 - Serial Number 49, February 2015, Pages 538-549 PDF (862.18 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/ijwpr.2014.8455 | ||
| Authors | ||
| vida haji Aghaei* 1; Seeyed Ahmad Mirshokraie2; Tayyebe partovi3 | ||
| 1, Master of Science, Payame Noor University, Tehran, Iran | ||
| 2Professor, Department of Chemistry, Payame Noor University, Tehran, Iran | ||
| 3Assistant Professor, Department of Chemistry, Payame Noor University, Tehran, Iran | ||
| Abstract | ||
| In this study, the structure of Soda (soluble fraction in ethanol) and Dioxane lignins of bagasse were studied by using derivatization followed by reductive cleavage (DFRC) method and some techniques including gel permeation chromatography, gas chromatography-mass spectrometry and 13C-nuclear magnetic resonance spectroscopy and the results were compared. These comparative results show that the main monomeric compounds are obtained from the cleavage of β-O-4 bonds of lignins. The components obtained from Dioxane lignin and Soda lignin are guaiacyl, syringyl and p-hydroxyphenyl structures with different proportions. However, some differences have been observed in both lignins, including a variety of structural units in Dioxane lignin is greater than Soda lignin. In other words, soda lignin degradation and the structural components has become closer together and are more uniform structures. The average molecular weight of Dioxane lignin, is greater than Soda lignin, which is due to Soda lignin wide chemical degradation during industrial pulping processes and therefore it has less dense structure. These observations indicate that a mild method for lignin separation from a lignocellulosic material caused less damage and changes in lignin structure. Therefore, in structural studies, Dioxane lignin can actually be used as an appropriate representative of the lignin. | ||
| Keywords | ||
| Soda Lignin; Dioxane Lignin; Bagasse; Derivatization Followed by Reductive Cleavage; Spectroscopy Methods | ||
| References | ||
|
- Abdolkhni, A.; 2009. Chemical characterization of milled and cellulytic lignins from poplar (populous deltoides). Ph. D Thesis, Tehran university.
- Adler, E. and Hemestam, S., 1955. Estimation of phenolic hydroxyl groups in lignin: 1. Periodate oxidation of guaiacyl compounds, Acta Chem. Sand., 9:319-334.
- Belgacem, M. N., & Gandini, A., 2008. Monomers, polymers and composites from renewable resources. Oxford: Elsevier.
- Bjorkman, A., 1954. Isolation of lignin from finely divided wood with neutral solvents. Nature, 174, 1057.
- Brauns, F. E. and Brauns, D. A.، 1960. The chemistry of lignin، supplements volume، Academic Press، New York، 804 p.
- Lu, F., and Ralph, J., 1997. Derivatization Followed by Reductive Cleavage (DFRC Method), a New Method for Lignin Analysis: Protocol for Analysis of DFRC Monomers. Journal of Agricultural and Food Chemistry, 45, 2590-2592.
- Lu, F.; Ralph, J., 1997. The DFRC Method for Lignin Analysis. 1. New Method for β-Aryl Ether Cleavage: Lignin Model Studies. Journal of Agricultural and Food Chemistry, 45, 4655-4660.
- Lu, F., and Ralph, J., 1998. The DFRC method for lignin analysis. 2. Monomers from isolated lignin. Journal of Agricultural and Food Chemistry, 46, 547-552.
- Mirshokraie, S.A., 2011. Investigating the effect of structural changes of alkali lignins caused by reduction and methylation reaction on the optical characteristics of lignin-containing papers. Iranian J. Wood Paper Sci. Res., 26, 10-25.
- Partovi, T., Mirshokraie, S.A., 2013. The Structural Study of Milled Wood and Dioxane Lignin of Cupressus Sempervirens Using DFRC Method. Iranian J. Nat. Res., 65, 391-404.
- Rio, J. C. Del, Gutierrez, A., Mertinez, M. J. and Martinez, A. T. 2001. Py-GC-MS study of Eucalyptus globules wood treated with different fungi, J. Anal. Appl. Pyrolysis, 58/59: 441-453.
- Sederoff, R., Lewin, M. Goldstein, L. S. M. Dekker, H. M. Chang, 1991. Lignin: biosynthesis in wood structure and composition, Marcel, New York, 1328p.
| ||
|
Statistics Article View: 2,636 PDF Download: 1,571 |
||
Journal management system. designed by sinaweb