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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Bibliographic Details
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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Summary: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.
ISSN:2076-3417
2076-3417
DOI:10.3390/app10082910