A new procedure for the hydrophobization of cellulose fibre using laccase and a hydrophobic phenolic compound

García-Ubasart, Jordi; Colom, J. F.; Vila, Carlos; Hernandez, Nuria Gomez; Roncero, M. Blanca; Vidal, Teresa

doi:10.1016/j.biortech.2012.02.075

Cited by 58 publications

(40 citation statements)

References 16 publications

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“…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). The promising applications of laccase include textiledye bleaching (Mendonça Maciel et al 2010), pulp bleaching (Valls et al 2010), food improvement (Gochev and Krastanov 2007;Mendonça Maciel et al 2010), bioremediation of soils and water (Murugesan 2003;Bustos-Ramírez et al 2013), polymer synthesis , and the development of biosensors and biofuel cells (Kim et al 2014;Fokina et al 2015).…”

Section: Historical Developmentmentioning

confidence: 99%

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

Mahmood¹,

Hashim²,

Sulaiman³

et al. 2015

BioResources

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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.

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Section: Historical Developmentmentioning

confidence: 99%

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

Mahmood¹,

Hashim²,

Sulaiman³

et al. 2015

BioResources

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“…Internal sizing is a very common papermaking operation, accomplished by adding hydrophobic but reactive sizing agents into the pulp slurry. [5][6][7] Surface sizing is accomplished by applying sizing agents to the paper surface at the dry end of papermaking process. In addition to improve the water resistance, surface sizing treatment is also supposed to increase the surface strength and the tensile strength of paper.…”

Section: Introductionmentioning

confidence: 99%

Preparation and property of waterborne UV‐curable chain‐extended polyurethane surface sizing agent: Strengthening and waterproofing mechanism for cellulose fiber paper

Wang

Fan

Fei

et al. 2015

J of Applied Polymer Sci

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Waterborne UV-curable polyurethane (UWPU) dispersions with different hydrophilicity and functionalities were prepared by varying the content of dimethylol butanoic acid (DMBA) and pentaerythritol triacrylate (PETA). And linear and cyclic chain extenders with different functionalities were also incorporated into the UWPU backbone, including isophorone diamine (IPDA), diethylene triamine (DETA), and ethylene diamine (EDA). Effects of DMBA content, PETA content, photoinitiator content, UV curing time, chain extender on the properties of UWPU dispersions and films, as well as the properties of the unsized and sized paper were investigated. The water resistance and mechanical properties of sized paper were greatly relied on the particle size, the molecular weight, the croslinking density, and penetrability of UWPU. UWPU dispersion chain extended with IPDA (IPDA-UWPU) displayed smaller particle size than that of UWPU. The paper sized with IPDA-UWPU was endowed with best water resistance, tensile strength, folding strength and surface strength. XPS depth analysis revealed that IPDA-UWPU exhibited better penetrability into the paper substrate than UWPU. SEM and AFM demonstrated that the smoothness of sized paper was improved, and the bond strength between fibers was enhanced. The obtained UWPU could be directly used as an effective and fast drying surface sizing agent for cellulose fiber paper.

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“…In addition, they have been shown to possess amphiphilic and anticancer properties [11][12][13] . Several studies have employed gallates of variable alkyl chain length to modify the properties of materials such as wool 14 , cellulose 15 , chitosan 16 , titanium dioxide 17 , and ceramics 18 , conferring improved thermal and thermo-oxidative stability (polymers, foams) or dispersibility.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have shown that cellulose fibers can be functionalized using enzymes. Surface modification of cellulose fibers to obtain hydrophobic paper sheets 15 , improve mechanical resistance 19 , or obtain antimicrobial properties 20 , are among the many successful applications of enzyme-catalyzed cellulose functionalization. In contrast to what has been done so far, our recent studies were not aimed at directly modifying the surface of the fibers, but at functionalization of the surface of paper sheets by a method in which the presence of the cellulosic substrate was not necessary during the enzymatic reaction 1 .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Insights on the Hydrophobicity of Cellulose Substrates Imparted by Enzymatically Oxidized Gallates with Increasing Alkyl Chain Length

Cusola

Valls

Vidal

et al. 2015

ACS Appl. Mater. Interfaces

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In this work, we studied the influence of the alkyl chain length in enzymaticallyoxidized gallates on the development of hydrophobicity on paper-based materials, and further correlated the obtained effect to the redox mechanism of the enzymatic treatment. Laccase (Lac) enzyme was used to oxidize various members of the gallate homologous series in the presence or not of lignosulfonates (SL) to produce several functionalization solutions (FS), which were subsequently applied to cellulosic substrates. The hydrophobicity of the substrates was then assessed by means of water drop test (WDT) and contact angle (WCA) measurements. Hydrophobicity peaked reaching WDT and WCA values around 5000 seconds and 130º respectively, and then 2 decreased with increasing length of the hydrocarbon chain of gallate. Cyclic voltrammetry (CV) was used to study the effect of SL on the redox reactions of several gallates. The intensity of the anodic peak in their voltammograms decreased increasing the chain length of the gallate. The electrochemical behavior of lauryl gallate (LG) differed from that of other gallates. The fact that the voltammetric curves for SL and LG intersected at a potential of 478 mV indicates an enhancing effect of SL on LG oxidation at high potentials (above 478 mV).

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A new procedure for the hydrophobization of cellulose fibre using laccase and a hydrophobic phenolic compound

Cited by 58 publications

References 16 publications

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

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

Preparation and property of waterborne UV‐curable chain‐extended polyurethane surface sizing agent: Strengthening and waterproofing mechanism for cellulose fiber paper

Electrochemical Insights on the Hydrophobicity of Cellulose Substrates Imparted by Enzymatically Oxidized Gallates with Increasing Alkyl Chain Length

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