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A preliminary investigation on enzymatic oxidative polymerization of lignin
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
2011 (English)In: 16th International Symposium on Wood, Fiber and Pulping Chemistry: Proceedings, ISWFPC, 2011, 238-241 p.Conference paper, Published paper (Refereed)
Abstract [en]

Enzyme catalyzed oxidative polymerization of technical bagasse lignin and low-molecular-weight ultra-filtered kraft pulp lignin (UFL) were studied in methanol-water solution. Lignin was dissolved in methanol-water solution at pH 13 in steam heated autoclave at 130°C for 2h. The polymerization reaction was conducted at 40°C with a commercial laccase under oxygen saturation. The weight-average molecular weight (Mw) of original macromonomer and polymerized lignin were characterized with alkaline size exclusion Chromatograph (SEC) system. Enzyme treatment increased the molecular weight of both technical bagasse lignin and ultra-filtered lignin up to 20 times. The reaction time and the enzyme dosage were studied to obtain the maximal molecular weight.

Place, publisher, year, edition, pages
2011. 238-241 p.
Series
16th International Symposium on Wood, Fiber and Pulping Chemistry - Proceedings, ISWFPC, 1
Keyword [en]
Laccase, Polymerization, Technical bagasse lignin, Ultra-filtered lignin, Enzyme dosage, Enzyme treatment, Laccases, Low molecular weight, Macromonomer, Methanol-water, Oxidative polymerization, Oxygen saturation, Polymerization reaction, Size exclusion, Weight-average molecular weight, Alkalinity, Bagasse, Enzymes, Kraft process, Kraft pulp, Lignin, Methanol, Molecular weight, Polymers, Wood, Kraft Pulps, Lignins
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:kth:diva-149766Scopus ID: 2-s2.0-84863418129OAI: oai:DiVA.org:kth-149766DiVA: diva2:743078
Conference
16th International Symposium on Wood, Fiber and Pulping Chemistry, ISWFPC; Tianjin, China, 8-10 June, 2011
Note

QC 20140903

Available from: 2014-09-03 Created: 2014-08-27 Last updated: 2014-09-03Bibliographically approved

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