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

Azimvand, Jafar; Mirshokraie, Seeyed Ahmad; Abdolkhani, Ali

doi:10.22092/ijwpr.2012.116219

Authors

¹ M.Sc., Dept. of Organic Chemistery, Payam Noor University, Tehran, Iran

² Professor, Dept. of Organic Chemistry, Payam Noor University,Tehran, Iran

³ Assistant professor, Dept. of Wood and Paper Science and Technoloy, Faculty of Natural Resources, University of Tehran, Karaj, Iran

https://doi.org/10.22092/ijwpr.2012.116219

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

References

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Iranian Journal of Wood and Paper Science Research

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

References

References

Volume 27, Issue 3 - Serial Number 40
September 2012
Pages 556-568

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

References

References

Volume 27, Issue 3 - Serial Number 40September 2012Pages 556-568

Volume 27, Issue 3 - Serial Number 40
September 2012
Pages 556-568