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Azimvand, J., Mirshokraie, S., Abdolkhani, A. (2012). Studing the effect of reducing agents (sodium borhydrade and sodium dithionite) on chemical structures of poplar kraft and bagasse soda alkali lignin by FT-IR spectroscopy. , 27(3), 556-568. doi: 10.22092/ijwpr.2012.116219
Jafar Azimvand; Seeyed Ahmad Mirshokraie; Ali Abdolkhani. "Studing the effect of reducing agents (sodium borhydrade and sodium dithionite) on chemical structures of poplar kraft and bagasse soda alkali lignin by FT-IR spectroscopy". , 27, 3, 2012, 556-568. doi: 10.22092/ijwpr.2012.116219
Azimvand, J., Mirshokraie, S., Abdolkhani, A. (2012). 'Studing the effect of reducing agents (sodium borhydrade and sodium dithionite) on chemical structures of poplar kraft and bagasse soda alkali lignin by FT-IR spectroscopy', , 27(3), pp. 556-568. doi: 10.22092/ijwpr.2012.116219
Azimvand, J., Mirshokraie, S., Abdolkhani, A. Studing the effect of reducing agents (sodium borhydrade and sodium dithionite) on chemical structures of poplar kraft and bagasse soda alkali lignin by FT-IR spectroscopy. , 2012; 27(3): 556-568. doi: 10.22092/ijwpr.2012.116219

Studing the effect of reducing agents (sodium borhydrade and sodium dithionite) on chemical structures of poplar kraft and bagasse soda alkali lignin by FT-IR spectroscopy

تحقیقات علوم چوب و کاغذ ایران
Article 15, Volume 27, Issue 3 - Serial Number 40, September 2012, Pages 556-568    PDF (289.5 K)
DOI: 10.22092/ijwpr.2012.116219
Authors
Jafar Azimvand* 1; Seeyed Ahmad Mirshokraie2; Ali Abdolkhani3
1M.Sc., Dept. of Organic Chemistery, Payam Noor University, Tehran, Iran
2Professor, Dept. of Organic Chemistry, Payam Noor University,Tehran, Iran
3Assistant professor, Dept. of Wood and Paper Science and Technoloy, Faculty of Natural Resources, University of Tehran, Karaj, Iran
Abstract
In this study, the chemical changes of functional groups (C=O) and double bond (C=C), induced in the structures of poplar kraft lignin and bagasse soda lignin were investigated. The reducing effect of sodium borohydride and sodium hydrosulfite, followed by the UV irradiation on these two compounds were determined using FT-IR spectroscopy. Results showed that, reduction of the lignin by reducing chemical imparted stability in lignin structure against UV light. The FT-IR spectroscopy showed that, the major light stabilizing phenomenon that is responsible for this stability is the conversion of carbonyl groups (C=O) alcohol group (C-OH) and double bonds (C=C) to single bonds (C-C). Between the two reducing compound, sodium borohydride showed better performance than sodium hydrosulfite.
Keywords
poplar Kraft lignin; bagasse Soda lignin; sodium borohydride; sodium hydrosulfite; FT-IR spectroscopy
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