ANALYSIS OF PHOTODEGRADED LIGNIN AND LIGNIN MODEL COMPOUNDS BY ATR-FTIR SPECTROSCOPY

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MIRSHOKRAIE S.A.; LARIE J.; MOSTAGHNI F.; ABDULKHANI A.

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Journal: IRANIAN WOOD AND PAPER SCIENCE RESEARCH Year:2014 | Volume:29 | Issue:3 Page(s): 343-353

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Title

ANALYSIS OF PHOTODEGRADED LIGNIN AND LIGNIN MODEL COMPOUNDS BY ATR-FTIR SPECTROSCOPY

Author(s)

MIRSHOKRAIE S.A. | LARIE J. | MOSTAGHNI F. | ABDULKHANI A. | Issue Writer Certificate

Keywords

BJORKMANQ2

β-O-4 LIGNIN MODEL COMPOUNDSQ2

PHOTODEGRADATIONQ2

ATR-FTIR SPECTROSCOPYQ2

Abstract

In this study, optical behavior of methylated and unmethylated Bjorkman lignin from poplar wood and two lignin model compound (phenolic and non phenolic) with b-O-4 linkages was investigated. First, these lignins were precipitated on a cellulosic matrix (Whatman Paper) using different times (0, 5, 10, 15, 20 h) and then matrixcovered surface was analyzed using Attenuated Total Reflectance FTIR technique. The results showed that irradiation altered the chemical structure of all samples. Lignin was the most sensitive component to photodegradation and the intensities of its characteristic bands decreased significantly during the process of irradiation. This was accompanied by formation of new carbonyl groups appearing at 1735 cm-1. Compared with the unmethylated forms, the rate of lignin degradation and carbonyl formation was relatively lower in methylated forms. In other words, methylation of phenolic hydroxyl group reduced the chemical changes induced by irradiation.

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APA: Copy

MIRSHOKRAIE, S.A., LARIE, J., MOSTAGHNI, F., & ABDULKHANI, A.. (2014). ANALYSIS OF PHOTODEGRADED LIGNIN AND LIGNIN MODEL COMPOUNDS BY ATR-FTIR SPECTROSCOPY. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, 29(3), 343-353. SID. https://sid.ir/paper/109537/en

Vancouver: Copy

MIRSHOKRAIE S.A., LARIE J., MOSTAGHNI F., ABDULKHANI A.. ANALYSIS OF PHOTODEGRADED LIGNIN AND LIGNIN MODEL COMPOUNDS BY ATR-FTIR SPECTROSCOPY. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH[Internet]. 2014;29(3):343-353. Available from: https://sid.ir/paper/109537/en

IEEE: Copy

S.A. MIRSHOKRAIE, J. LARIE, F. MOSTAGHNI, and A. ABDULKHANI, “ANALYSIS OF PHOTODEGRADED LIGNIN AND LIGNIN MODEL COMPOUNDS BY ATR-FTIR SPECTROSCOPY,” IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, vol. 29, no. 3, pp. 343–353, 2014, [Online]. Available: https://sid.ir/paper/109537/en

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