Enzymatic grafting of natural phenols to flax fibres: Development of antimicrobial properties

Fillat, Amanda; Gallardo, Óscar; Vidal, Teresa; Pastor, F. I. Javier; Dı́az, Pilar; Roncero, M. Blanca

doi:10.1016/j.carbpol.2011.07.030

Cited by 98 publications

(51 citation statements)

References 32 publications

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“…Up to now the highest properties are reported for flax and nettle fibres slightly above hemp [5][6][7][8][9][10][11][12]. However, their weak point is their low antimicrobial activity [13][14][15]. This may be due to the low micro-fibrillar angles observed for flax and hemp (about 10˚ and 6˚ respectively [16]) as compared to coir 45˚.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Flax and Hemp Yarns Designed for the Manufacturing of Geotextiles. Improvement of the Resistance to Soil born Microorganisms

Ouagne¹,

Renouard²,

Lainé³

2017

JTEFT

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Geotextiles are widely used to stabilize river banks from erosion when these ones are restored into vegetal covered areas as mentioned by European regulations. For these applications imported coir (coconut shell fibres) based geotextiles are generally used because coir fibres show a good resistance to soil degradation. In Europe, flax and hemp plants are already grown for textile, building or oil applications. By-products of these industries such as flax tows and short hemp fibres were used to manufacture yarns. The resistance to degradation via the measurement of the mechanical properties of these yarns submitted to enzymatic (cellulase) and microbial attacks (Cellvibrio gandavensis) mimicking soil degradation was evaluated. Large decreases in mechanical properties were observed, even though these ones were still higher than the as received reference coir material. After impregnation by chitosan of the fibres, the tensile properties of the yarns globally remained unchanged after severe attacks. The chitosan acts as a protection against the soil microorganism attacks. As a consequence, flax and hemp by-products could be good candidates for local manufacturing of biodegradable geotextiles.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Flax and Hemp Yarns Designed for the Manufacturing of Geotextiles. Improvement of the Resistance to Soil born Microorganisms

Ouagne¹,

Renouard²,

Lainé³

2017

JTEFT

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“…In recent years, a great interest has grown in the development of polymeric materials or composites with multifunctional characteristics, such as antibacterial, anticorrosive, biocompatible and biodegradable, to explore their potential for wider use in a variety of applications e.g. biomedical, pharmaceutical, drug delivery, food packaging, sanitary materials, household, energy and military items [2,[4][5][6][7][8]. In our previous work, novel enzyme-based composites by grafting poly (3- [2,4,7].…”

Section: Introductionmentioning

confidence: 99%

“…From the last few years, antimicrobial finishing of medical materials has become extremely important in the production of protective, biocompatible, biodegradable, non-toxic products with respect to the health and safety. This has provided opportunities to expand the use of biomaterials to different applications in the pharmaceutical, medical, tissue engineering, agricultural, and food industries [4][5][6][7]. Most phenols like caffeic acid, as natural auxiliaries host antimicrobial activity and can also be grafted to improve or impart existing or antimicrobial properties, respectively.…”

Section: Introductionmentioning

confidence: 99%

Development of novel antibacterial active, HaCaT biocompatible and biodegradable CA-g-P(3HB)-EC biocomposites with caffeic acid as a functional entity

Iqbal¹,

Kyazze²,

Locke³

et al. 2015

Express Polym. Lett.

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Abstract.We have developed novel composites by grafting caffeic acid (CA) onto the P(3HB)-EC based material and laccase from Trametes versicolor was used for grafting purposes. The resulting composites were designated as CA-g-P(3HB)-EC i.e., P(3HB)-EC (control), 5CA-g-P(3HB)-EC, 10CA-g-P(3HB)-EC, 15CA-g-P(3HB)-EC and 20CA-g-P(3HB)-EC. FT-IR (Fourier-transform infrared spectroscopy) was used to examine the functional and elemental groups of the control and laccase-assisted graft composites. Evidently, 15CA-g-P(3HB)-EC composite exhibited resilient antibacterial activity against Gram-positive and Gram-negative bacterial strains. Moreover, a significant level of biocompatibility and biodegradability of the CA-g-P(3HB)-EC composites was also achieved with the human keratinocytes-like HaCaT cells and soil burial evaluation, respectively. In conclusion, the newly developed novel composites with multi characteristics could well represent the new wave of biomaterials for medical applications, and more specifically have promising future in the infection free would dressings, burn and/or skin regeneration field due to their sophisticated characteristics.

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“…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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Enzymatic grafting of natural phenols to flax fibres: Development of antimicrobial properties

Cited by 98 publications

References 32 publications

Mechanical Properties of Flax and Hemp Yarns Designed for the Manufacturing of Geotextiles. Improvement of the Resistance to Soil born Microorganisms

Mechanical Properties of Flax and Hemp Yarns Designed for the Manufacturing of Geotextiles. Improvement of the Resistance to Soil born Microorganisms

Development of novel antibacterial active, HaCaT biocompatible and biodegradable CA-g-P(3HB)-EC biocomposites with caffeic acid as a functional entity

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

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