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Hydrophobic properties conferred to Kraft pulp by a laccase-catalysed treatment with lauryl gallate
- Source :
- Journal of Biotechnology, Journal of Biotechnology, Elsevier, 2013, 167 (3), pp.302-308. ⟨10.1016/j.jbiotec.2013.07.014⟩
- Publication Year :
- 2013
- Publisher :
- Elsevier BV, 2013.
-
Abstract
- Hydrophobic properties were conferred to a high-lignin-content Kraft pulp by a laccase-catalysed treatment in the presence of lauryl gallate (LG). The treatment resulted in a two-fold increase in contact angle and conferred water absorption resistance to the pulp. Kappa number was increased, indicating that some phenolic compounds were incorporated in the pulp. A control treatment with LG alone did not affect water absorption, demonstrating that laccase was essential to attain these new properties. The loss of hydrophobicity after an acetone Soxhlet extraction highlighted that adsorbed acetone-soluble compounds played a key role in the properties. GC-FID and HPSEC-UV analysis of the acetone extract indicated the formation of dodecanol and different phenolic oligomers. SEM images showed the treatment-induced changes in the fibre network. Additional experiments with various reaction times and reactant concentrations highlighted the role of LG oxidation products in the introduction of absorption resistance. (C) 2013 Elsevier B.V. All rights reserved.
- Subjects :
- Paper
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences
0106 biological sciences
Absorption of water
Hydrophobicity
MODELS
Bioengineering
Kappa number
01 natural sciences
Applied Microbiology and Biotechnology
Acetone
GALLIC ACID
chemistry.chemical_compound
Adsorption
010608 biotechnology
Organic chemistry
Gallic acid
Laccase
010405 organic chemistry
Green Chemistry Technology
General Medicine
Wood
0104 chemical sciences
chemistry
Kraft process
Papermaking
Lauryl gallate
Dodecanol
Hydrophobic and Hydrophilic Interactions
Biotechnology
Subjects
Details
- ISSN :
- 01681656
- Volume :
- 167
- Database :
- OpenAIRE
- Journal :
- Journal of Biotechnology
- Accession number :
- edsair.doi.dedup.....85c69d8a5df666d7fadc1fffba2833a5
- Full Text :
- https://doi.org/10.1016/j.jbiotec.2013.07.014