Enzymatic modification of different lignins through oxidative coupling with hydrophilic compounds

Ionita Firuta Fiţigəu; Carmen Gabriela Boeriu; Francisc Peter

doi:10.1002/masy.201400157

Enzymatic modification of different lignins through oxidative coupling with hydrophilic compounds

Ionita Firuta Fiţigəu, Carmen Gabriela Boeriu^*, Francisc Peter

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

5 Citations (Scopus)

Abstract

The enzymatic oxidative coupling of five technical lignins from different sources and with different molecular properties, with glucosamine and the tripeptide glycil-tyrosyl-glycine was studied in acetone/water mixture, using laccase as catalyst. The modified lignin was isolated and the product was characterized by means of size exclusion chromatography, FT-IR and ³¹P-NMR, in order to evidence the main lignin modifications after laccase coupling reactions. An important increase of the molecular weight and significant structural modifications were observed for the product obtained after the coupling reactions of Organosolv Hardwood Lignin and Alkali pretreated Wheat straw Lignin with glucosamine and glycil-tyrosyl-glycine, demonstrating the achievement of the modification reactions.

Original language	English
Pages (from-to)	78-86
Journal	Macromolecular Symposia
Volume	352
Issue number	1
DOIs	https://doi.org/10.1002/masy.201400157
Publication status	Published - 2015

Keywords

grafting
laccase
lignin
oxidative coupling

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title = "Enzymatic modification of different lignins through oxidative coupling with hydrophilic compounds",

abstract = "The enzymatic oxidative coupling of five technical lignins from different sources and with different molecular properties, with glucosamine and the tripeptide glycil-tyrosyl-glycine was studied in acetone/water mixture, using laccase as catalyst. The modified lignin was isolated and the product was characterized by means of size exclusion chromatography, FT-IR and 31P-NMR, in order to evidence the main lignin modifications after laccase coupling reactions. An important increase of the molecular weight and significant structural modifications were observed for the product obtained after the coupling reactions of Organosolv Hardwood Lignin and Alkali pretreated Wheat straw Lignin with glucosamine and glycil-tyrosyl-glycine, demonstrating the achievement of the modification reactions.",

keywords = "grafting, laccase, lignin, oxidative coupling",

author = "Fi{\c t}igəu, {Ionita Firuta} and Boeriu, {Carmen Gabriela} and Francisc Peter",

year = "2015",

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language = "English",

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pages = "78--86",

journal = "Macromolecular Symposia",

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T1 - Enzymatic modification of different lignins through oxidative coupling with hydrophilic compounds

AU - Fiţigəu, Ionita Firuta

AU - Boeriu, Carmen Gabriela

AU - Peter, Francisc

PY - 2015

Y1 - 2015

N2 - The enzymatic oxidative coupling of five technical lignins from different sources and with different molecular properties, with glucosamine and the tripeptide glycil-tyrosyl-glycine was studied in acetone/water mixture, using laccase as catalyst. The modified lignin was isolated and the product was characterized by means of size exclusion chromatography, FT-IR and 31P-NMR, in order to evidence the main lignin modifications after laccase coupling reactions. An important increase of the molecular weight and significant structural modifications were observed for the product obtained after the coupling reactions of Organosolv Hardwood Lignin and Alkali pretreated Wheat straw Lignin with glucosamine and glycil-tyrosyl-glycine, demonstrating the achievement of the modification reactions.

AB - The enzymatic oxidative coupling of five technical lignins from different sources and with different molecular properties, with glucosamine and the tripeptide glycil-tyrosyl-glycine was studied in acetone/water mixture, using laccase as catalyst. The modified lignin was isolated and the product was characterized by means of size exclusion chromatography, FT-IR and 31P-NMR, in order to evidence the main lignin modifications after laccase coupling reactions. An important increase of the molecular weight and significant structural modifications were observed for the product obtained after the coupling reactions of Organosolv Hardwood Lignin and Alkali pretreated Wheat straw Lignin with glucosamine and glycil-tyrosyl-glycine, demonstrating the achievement of the modification reactions.

KW - grafting

KW - laccase

KW - lignin

KW - oxidative coupling

U2 - 10.1002/masy.201400157

DO - 10.1002/masy.201400157

M3 - Article

AN - SCOPUS:84932182585

VL - 352

SP - 78

EP - 86

JO - Macromolecular Symposia

JF - Macromolecular Symposia

SN - 1022-1360

IS - 1

ER -