Enzymatic treatments of pulp using laccase and hydrophobic compounds

García-Ubasart, Jordi; Esteban, Alberto; Vila, Carlos; Roncero, M. Blanca; Colom, J. F.; Vidal, Teresa

doi:10.1016/j.biortech.2010.10.020

Cited by 50 publications

(40 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…García-Ubasart et al tested, among different hydrophobic compounds, lauryl gallate with laccase from Trametes villosa in order to provide new characteristics to paper pulp from Eucalyptus globulus. [36] Grafting of lauryl gallate may work as an internal sizing agent of paper and also for significant reduction of paper surface wettability. [36,37] …”

Section: Wood Hydrophobization: Contact Angle Determinationsmentioning

confidence: 99%

“…[34][35][36][37] However, the effectiveness of this methodology had never been evaluated in wood until this work. For instance, Hossain et al evaluated the capability of lauryl gallate to provide hydrophobicity, antioxidant and antimicrobial properties to wool fabrics.…”

Section: Wood Hydrophobization: Contact Angle Determinationsmentioning

confidence: 99%

“…[31][32][33] In addition, it is conventionally used as an antioxidant compound in the food and cosmetic industries. Although lauryl gallate has been employed for the hydrophobization of cotton fibers [34,35] and, more recently, of paper pulp, [36,37] it has not yet been tested in wood.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Wood Hydrophobization by Laccase-Assisted Grafting of Lauryl Gallate

Fernández‐Fernández

Sanromán

Moldes

2014

Journal of Wood Chemistry and Technology

View full text Add to dashboard Cite

Hydrophobization of Fagus sylvatica veneers was carried out by grafting a hydrophobic compound (lauryl gallate) by means of an enzymatic treatment with a commercial laccase. Two parameters related to hydrophobization (time of water absorption and contact angle of water with the wood surface) were increased only when laccase was present in wood treatments. FTIR (Fourier Transform Infrared Spectroscopy) and XPS (X-ray Photoelectron Spectroscopy) analysis demonstrated that the bond between the lauryl gallate and the wood was stable, even after the organic extraction of wood. It was confirmed that the use of a procedure with laccase and hydrophobic phenol compounds can improve the hydrophobicity of wood surface in a permanent way.

show abstract

Section: Wood Hydrophobization: Contact Angle Determinationsmentioning

confidence: 99%

Section: Wood Hydrophobization: Contact Angle Determinationsmentioning

confidence: 99%

See 1 more Smart Citation

Wood Hydrophobization by Laccase-Assisted Grafting of Lauryl Gallate

Fernández‐Fernández

Sanromán

Moldes

2014

Journal of Wood Chemistry and Technology

View full text Add to dashboard Cite

show abstract

“…Although laccase has low redox potential, it can oxidize the phenolic compounds of lignin. This oxidation property of laccase can be improved further by addition of natural or chemical mediators, promoting the oxidation of other the recalcitrant aromatic compounds (Moldes et al 2010;Garcia-Ubasart et al 2011). Because of their wide reaction capability and broad substrate specificity, laccase enzymes possess great biotechnological potential (Kunamneni et al 2008b;Garcia-Ubasart et al 2012).…”

Section: Historical Developmentmentioning

confidence: 99%

Laccase, an Emerging Tool to Fabricate Green Composites: A Review

Mahmood¹,

Hashim²,

Sulaiman³

et al. 2015

BioResources

View full text Add to dashboard Cite

In the last two decades, laccases have received much attention from researchers because of their specific ability to oxidize lignin. This function of laccase is very useful for applications in several biotechnological processes, including delignification in the pulp and paper industry and the detoxification of industrial effluents from the textile and petrochemical industries. This review focuses on laccase-mediated fiberboard synthesis. Growing concerns regarding the emission of formaldehyde from wood composites has prompted industrialists to consider the fabrication of green composites. Laccase-mediated fiber treatments oxidize the lignin component without affecting the cellulose structure. As a result, free radicals are generated on the fiber surface, and these can act as potential reactive sites for further cross-linking reactions in board manufacturing. Binderless fiberboards prepared using such methods can be considered as green composites because the manufacturing process involves no additional resin.

show abstract

“…The grafting of fluorophenols and long chain alkylamines on wood fibers can increase the hydrophobicity of the wood fiber surface (Kudanga et al 2010c). The strongest internal sizing effect resulted when the kraft pulp was treated by laccase with hydrophobic compounds (Garcia-Ubasart et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Laccase-Catalyzed Fiber Functionalization with Different Phenolic Compounds for Enhancing Pulp Strength

Liu¹,

Qin²,

Li³

2013

BioResources

View full text Add to dashboard Cite

Chemo-enzymatic functionalization offers an innovative approach to produce paper and board products with enhanced performance. Unbleached softwood kraft pulps were functionalized by laccase with methyl syringate(MS), p-hydroxybenzoic acid(HBA), gallic acid(GA), and syringaldehyde(SyA). The wet strength of fibers treated with MS and SyA increased by 57.9% and 31.9%, respectively. The dry strength of fibers treated with HBA, GA, and SyA increased from about 64 N·m/g to 68 N·m/g. The opacity of MS-treated fibers was the highest, and the surface lignin coverage increased. The kappa number and surface lignin of HBAtreated fibers changed little; however, the total carboxyl group significantly increased. The participation of phenolic compounds enhanced the reactivity of fibers to laccase in varying degree. However, the reactivity of phenols to laccase did not show a direct relation to the paper strength. All treatments with phenols decreased the brightness and the curl index of fibers. The syringyl-type phenols with hydrophobic groups (OCH 3 ) were shown to be effective for improving the pulp wet strength. The compounds with carboxyl groups enhanced the pulp dry-strength. The observed pulp strength improvement could be attributed to the formation of covalent bonding via radical coupling, the attachment of the functional group, increased bonding area, and fiber entanglement.

show abstract

Enzymatic treatments of pulp using laccase and hydrophobic compounds

Cited by 50 publications

References 30 publications

Wood Hydrophobization by Laccase-Assisted Grafting of Lauryl Gallate

Wood Hydrophobization by Laccase-Assisted Grafting of Lauryl Gallate

Laccase, an Emerging Tool to Fabricate Green Composites: A Review

Laccase-Catalyzed Fiber Functionalization with Different Phenolic Compounds for Enhancing Pulp Strength

Contact Info

Product

Resources

About