Mechanical Properties of Cellulose and Flax Fiber Unidirectional Reinforced Plywood

This research presents the influence of two different cellulose (hydrophobic pretreated/non-pretreated) and one flax-fiber unidirectional nonwoven low areal weight fiber reinforcements on the mechanical properties of urea-formaldehyde bonded five layered beech ( L.) plywood as an alternative to comm...

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Bibliographic Details
Published in:Polymers 2022-02, Vol.14 (4), p.843
Main Authors: Jorda, Johannes, Kain, Günther, Barbu, Marius-Catalin, Köll, Berndt, Petutschnigg, Alexander, Král, Pavel
Format: Article
Language:English
Subjects:
Adhesives
Beech
Bond strength
Cellulose
Cellulose fibers
Composite materials
Elasticity
Fiber reinforcement
Flax
Humidity
Hydrophobicity
Lignocellulose
Mechanical properties
Modulus of elasticity
Modulus of rupture
Plywood
Product life cycle
Shear strength
Synthetic fibers
Tensile strength
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Summary:This research presents the influence of two different cellulose (hydrophobic pretreated/non-pretreated) and one flax-fiber unidirectional nonwoven low areal weight fiber reinforcements on the mechanical properties of urea-formaldehyde bonded five layered beech ( L.) plywood as an alternative to commonly used synthetic fiber reinforcements. The results display divergent trends regarding the improvement of the mechanical properties-modulus of elasticity, modulus of rupture, tensile strength, shear strength, and screw withdrawal resistance. The non-treated cellulose and flax reinforcing nonwoven fabrics revealed similar mechanical behaviors. The hydrophobic pretreatment of cellulose nonwovens improved the performance of plywood regarding tensile strength (10-11%), shear strength (7-16%), screw withdrawal resistance (11-15%), and modulus of rupture (0-2%), but lowered modulus of elasticity (2-3%) compared to the reference.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym14040843