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Surface Modification of Flax Yarns by Enzymatic Treatment and Their Interfacial Adhesion with Thermoset Matrices

The aim of this study was to assess the effects of commercially available and relatively inexpensive enzyme preparations based on endo 1,4-β-xylanase, pectinase and xyloglucanase on the thermal (TGA), morphological (SEM), chemical (FT-IR) and mechanical (single yarn tensile tests) properties of flax...

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Published in:	Applied sciences 2020-04, Vol.10 (8), p.2910
Main Authors:	Seghini, Maria Carolina, Tirillò, Jacopo, Bracciale, Maria Paola, Touchard, Fabienne, Chocinski-Arnault, Laurence, Zuorro, Antonio, Lavecchia, Roberto, Sarasini, Fabrizio
Format:	Article
Language:	English
Subjects:	Acids Adhesion Bond strength Composite materials Contact angle Engineering Sciences enzymatic treatment Enzymes Flax flax fibres Fourier transforms Hemicellulose interface/interphase Lignin Mechanical properties Mechanics Mechanics of materials Moisture absorption natural fibres Pectin Pectinase Polymers Shear strength surface modification treatments Tensile strength Tensile tests Thermal stability Thermosetting resins Vinyl ester resins Xylanase Xyloglucanase Yarn Yarns
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creator	Seghini, Maria Carolina Tirillò, Jacopo Bracciale, Maria Paola Touchard, Fabienne Chocinski-Arnault, Laurence Zuorro, Antonio Lavecchia, Roberto Sarasini, Fabrizio
description	The aim of this study was to assess the effects of commercially available and relatively inexpensive enzyme preparations based on endo 1,4-β-xylanase, pectinase and xyloglucanase on the thermal (TGA), morphological (SEM), chemical (FT-IR) and mechanical (single yarn tensile tests) properties of flax yarns. The preparation based on pectinase and xyloglucanase provided the best results, resulting in the effective removal of hydrophilic components such as hemicellulose and pectin, the individualization of yarns and increased thermal stability at the expense of a reduction in mechanical properties, depending on the treatment parameters. Single yarn fragmentation tests pointed out an improved interfacial adhesion after enzymatic treatment, with reduced debonding length values of 18% for an epoxy matrix and up to 36% for a vinylester resin compared to untreated flax yarns.
doi_str_mv	10.3390/app10082910
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subjects	Acids Adhesion Bond strength Composite materials Contact angle Engineering Sciences enzymatic treatment Enzymes Flax flax fibres Fourier transforms Hemicellulose interface/interphase Lignin Mechanical properties Mechanics Mechanics of materials Moisture absorption natural fibres Pectin Pectinase Polymers Shear strength surface modification treatments Tensile strength Tensile tests Thermal stability Thermosetting resins Vinyl ester resins Xylanase Xyloglucanase Yarn Yarns
title	Surface Modification of Flax Yarns by Enzymatic Treatment and Their Interfacial Adhesion with Thermoset Matrices
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