Hydrophobic surface functionalization of lignocellulosic jute fabrics by enzymatic grafting of octadecylamine

Dong, Aixue; Fan, Xuerong; Wang, Qiang; Yu, Yuanyuan; Cavaco-Paulo, Artur

doi:10.1016/j.ijbiomac.2015.05.007

Cited by 43 publications

(28 citation statements)

References 34 publications

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“…Furthermore, extensive washing and rinsing with a good solvent (with respect to the amines) assured that any adsorbed material was washed off. Similar results were later found for the modification of jute fabrics with octadecylamine . The importance of extraction prior to laccase‐mediated modification was again exemplified because non‐extracted and unmodified jute exhibited SWCAs of 111°, due to the presence of lipophilic wax and fats.…”

Section: Laccase‐mediated Grafting On Lignocellulosessupporting

confidence: 72%

“…These modest results indicate minimal grafting of acrylamide. Additionally, the initial SWCA of the jute proved to be exceptionally high (110°), which was likely to have been caused by contamination of the jute with fats and waxes . The presence of these compounds could also have influenced possible grafting, which makes these results hard to interpret.…”

Section: Laccase‐mediated Grafting On Lignocellulosesmentioning

confidence: 99%

“…Many of the materials discussed herein are of natural origin and could be contaminated with feculence or fats . Contaminants might shield the surface; thus hampering the intended grafting.…”

Section: Introductionmentioning

confidence: 99%

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Laccase‐Mediated Grafting on Biopolymers and Synthetic Polymers: A Critical Review

2017

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Laccase‐mediated grafting on lignocelluloses has gained considerable attention as an environmentally benign method to covalently modify wood, paper and cork. In recent decades this technique has also been employed to modify fibres with a polysaccharide backbone, such as cellulose or chitosan, to infer colouration, antimicrobial activity or antioxidant activity to the material. The scope of this approach has been further widened by researchers, who apply mediators or high redox potential laccases and those that modify synthetic polymers and proteins. In all cases, the methodology relies on one‐ or two‐electron oxidation of the surface functional groups or of the graftable molecule in solution. However, similar results can very often be achieved through simple deposition, even after extensive washing. This unintended adsorption of the active substance could have an adverse effect on the durability of the applied coating. Differentiating between actual covalent binding and adsorption is therefore essential, but proves to be challenging. This review not only covers excellent research on the topic of laccase‐mediated grafting over the last five to ten years, but also provides a critical comparison to highlight either the lack or presence of compelling evidence for covalent grafting.

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Section: Laccase‐mediated Grafting On Lignocellulosessupporting

confidence: 72%

Section: Laccase‐mediated Grafting On Lignocellulosesmentioning

confidence: 99%

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Laccase‐Mediated Grafting on Biopolymers and Synthetic Polymers: A Critical Review

2017

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“…The most common chemical treatments of fibres, improving the WPC performance, involve silane [290,291], maleic anhydride [292,293,294,295], mercerization [296,297,298] and acetylation [9,299,300]. To make the fibre more hydrophobic, several other types of treatment, such as permanganate [301], acrylation [302], isocyanate [303], benzoylation, fatty acid derivation (oleoyl chloride), enzymatic [235,304], fluorination [305], octadecylamine [306], PEI (polyethylene imine), CaCl 2 and Ca(OH) 2 have also been investigated. Some physical methods involving treatment by plasma [307], heat, corona, laser or γ-ray [308,309] have also been used and impact positively on the mechanical properties, such as stiffness, of the WPC.…”

Section: Fibre Improvementmentioning

confidence: 99%

Plant Fibre: Molecular Structure and Biomechanical Properties, of a Complex Living Material, Influencing Its Deconstruction towards a Biobased Composite

et al. 2016

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Plant cell walls form an organic complex composite material that fulfils various functions. The hierarchical structure of this material is generated from the integration of its elementary components. This review provides an overview of wood as a composite material followed by its deconstruction into fibres that can then be incorporated into biobased composites. Firstly, the fibres are defined, and their various origins are discussed. Then, the organisation of cell walls and their components are described. The emphasis is on the molecular interactions of the cellulose microfibrils, lignin and hemicelluloses in planta. Hemicelluloses of diverse species and cell walls are described. Details of their organisation in the primary cell wall are provided, as understanding of the role of hemicellulose has recently evolved and is likely to affect our perception and future study of their secondary cell wall homologs. The importance of the presence of water on wood mechanical properties is also discussed. These sections provide the basis for understanding the molecular arrangements and interactions of the components and how they influence changes in fibre properties once isolated. A range of pulping processes can be used to individualise wood fibres, but these can cause damage to the fibres. Therefore, issues relating to fibre production are discussed along with the dispersion of wood fibres during extrusion. The final section explores various ways to improve fibres obtained from wood.

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“…6b), probably because of the removal of cellulose by cellulase, as well as the enzymatic dislodgement and redistribution of bulgy lignins on the surface. The lignin removed from the jute surface at the beginning of the laccase treatment can polymerize and covalently reattach to the surface in the later stages of the reaction (Zhou et al 2013b;Dong et al 2015). In addition, cellulase/laccase-treated jute fiber membranes showed more combinations between jute short fibers, which indicated higher mechanical properties for the fiber membranes.…”

Section: Sem Analysismentioning

confidence: 99%

Enzymatic Treatments to Improve Mechanical Properties and Surface Hydrophobicity of Jute Fiber Membranes

Dong¹,

Fan²,

Wang³

et al. 2016

BioResources

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Fiber membranes prepared from jute fragments can be valuable, low cost, and renewable. They have broad application prospects in packing bags, geotextiles, filters, and composite reinforcements. Traditionally, chemical adhesives have been used to improve the properties of jute fiber membranes. A series of new laccase, laccase/mediator systems, and multi-enzyme synergisms were attempted. After the laccase treatment of jute fragments, the mechanical properties and surface hydrophobicity of the produced fiber membranes increased because of the cross-coupling of lignins with ether bonds mediated by laccase. The optimum conditions were a buffer pH of 4.5 and an incubation temperature of 60 °C with 0.92 U/mL laccase for 3 h. Laccase/guaiacol and laccase/alkali lignin treatments resulted in remarkable increases in the mechanical properties; in contrast, the laccase/2,2'-azino-bis-(3-ethylthiazoline-6-sulfonate) (ABTS) and laccase/2,6-dimethoxyphenol treatments led to a decrease. The laccase/ guaiacol system was favorable to the surface hydrophobicity of jute fiber membranes. However, the laccase/alkali lignin system had the opposite effect. Xylanase/laccase and cellulase/laccase combined treatments were able to enhance both the mechanical properties and the surface hydrophobicity of jute fiber membranes. Among these, cellulase/laccase treatment performed better; compared to mechanical properties, the surface hydrophobicity of the jute fiber membranes showed only a slight increase after the enzymatic multi-step processes.

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Hydrophobic surface functionalization of lignocellulosic jute fabrics by enzymatic grafting of octadecylamine

Cited by 43 publications

References 34 publications

Laccase‐Mediated Grafting on Biopolymers and Synthetic Polymers: A Critical Review

Laccase‐Mediated Grafting on Biopolymers and Synthetic Polymers: A Critical Review

Plant Fibre: Molecular Structure and Biomechanical Properties, of a Complex Living Material, Influencing Its Deconstruction towards a Biobased Composite

Enzymatic Treatments to Improve Mechanical Properties and Surface Hydrophobicity of Jute Fiber Membranes

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