LIGNIN MODIFICATIONS IN HYDRO-THERMAL TREATMENT CONDITIONS

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HAMZEH Y.; KOUL F.; NOURI AREZOU; KARIMI A.N.; RAHBARI AMIR HOSSEIN

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Journal: Journal of Forest and Wood Products Year:2009 | Volume:62 | Issue:1 Page(s): 121-131

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Title

LIGNIN MODIFICATIONS IN HYDRO-THERMAL TREATMENT CONDITIONS

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Keywords

WOODQ2

THERMAL TREATMENTQ3

LIGNINQ2

FTIRQ3

13C NMRQ3

HPSECQ3

FURFURALQ3

Abstract

Heat treatment of WOOD causes a number of chemical and physical changes in the WOOD. Usually these changes have been studied on massive WOOD. Under this conditions, the overlapping of LIGNIN and carbohydrates structural changes results in incomplete interpretation of changes in the main constituents of WOOD. To elucidate the modifications of LIGNIN, in this study the pure LIGNIN was treated under hydro-thermal treatment conditions of WOOD and its modifications were analyzed by means of FTIR, 13C NMR and HPSEC. The results showed that the cleavage of etherified bonds increased number of free phenolic groups. This resulted in activation of LIGNIN and led to more condensed structure of LIGNIN. Consequently, the solubility of LIGNIN decreased in organic solvents and its molar mass distribution increased. The results indicated that the some carbohydrates derivates such as FURFURAL participated in the condensation reaction of LIGNIN.

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APA: Copy

HAMZEH, Y., KOUL, F., NOURI, AREZOU, KARIMI, A.N., & RAHBARI, AMIR HOSSEIN. (2009). LIGNIN MODIFICATIONS IN HYDRO-THERMAL TREATMENT CONDITIONS. JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES), 62(1), 121-131. SID. https://sid.ir/paper/163082/en

Vancouver: Copy

HAMZEH Y., KOUL F., NOURI AREZOU, KARIMI A.N., RAHBARI AMIR HOSSEIN. LIGNIN MODIFICATIONS IN HYDRO-THERMAL TREATMENT CONDITIONS. JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES)[Internet]. 2009;62(1):121-131. Available from: https://sid.ir/paper/163082/en

IEEE: Copy

Y. HAMZEH, F. KOUL, AREZOU NOURI, A.N. KARIMI, and AMIR HOSSEIN RAHBARI, “LIGNIN MODIFICATIONS IN HYDRO-THERMAL TREATMENT CONDITIONS,” JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES), vol. 62, no. 1, pp. 121–131, 2009, [Online]. Available: https://sid.ir/paper/163082/en

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