Improving moisture durability of flax fibre composites by using non-dry fibres

Lu, Maria Morissa; Vuure, Aart Willem Van

doi:10.1016/j.compositesa.2019.05.029

Cited by 35 publications

(19 citation statements)

References 26 publications

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“…Placing the fibres in an oven before impregnation with a thermoset matrix will influence the mechanical properties of the composite (Baley et al, 2012). Furthermore, composites (flax/polyester) made of fibres which have not been dried show considerably lower moisture sorption and desorption behaviour, and degree of swelling and shrinkage, than composites reinforced with dried fibres (Lu and Vuure, 2019).…”

Section: Correlation Between Mechanical Properties Of Fibres and Thosmentioning

confidence: 99%

Variability of mechanical properties of flax fibres for composite reinforcement. A review

Baley

Gomina

Bréard

et al. 2020

Industrial Crops and Products

115

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Flax fibres are a promising reinforcement in the development of biocomposites and are finding new applications in transport structures. However, there is a perceived problem with plant fibres related to the variability of the properties of these natural materials. This paper describes the factors which affect variability, from plant growth conditions to fibre sampling and testing. A large number of test results are presented (characterization of elementary fibres, bundles, assemblies of bundles, and unidirectional composites), and it is shown that provided fibre supply is carefully controlled, characterization procedures are appropriate, and manufacturing processes are optimal then excellent composite properties can be achieved with low variability. Highlights ► This paper provides a unique review of a large quantity of data from hundreds of tests on flax fibers ► Data are discussed in terms of testing procedures and sample geometry ► Variability of composite properties is discussed in terms of fibre variability

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Section: Correlation Between Mechanical Properties Of Fibres and Thosmentioning

confidence: 99%

Variability of mechanical properties of flax fibres for composite reinforcement. A review

Baley

Gomina

Bréard

et al. 2020

Industrial Crops and Products

115

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“…7,8 The water absorption of composites affects the mechanical and viscoelastic properties that showed degradation effects of water molecules on composites. [9][10][11] Hence, it becomes quintessential to address the aforementioned challenges by altering the structure of the fiber so that reduction in moisture content could be achieved and hence high thermo-mechanical have sustained. Hybridization is another probable approach to improvise the moisture uptake and hence achieve high mechanical and viscoelastic properties of the natural fiber-reinforced composites.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of water absorption on thermomechanical and viscoelastic properties of flax‐hemp‐reinforced hybrid composite

Saha

Kumar

Zindani³

2021

Polymer Composites

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The recent development of natural fiber-reinforced polymer composites have shown innumerable economic and environmental benefits for a vast array of engineering applications. It is quintessential to investigate the effect of water absorption on the composites that remain in the water for a maximum of their intended service period. This study is an effort in this direction that investigates the effect of water absorption on thermo-mechanical properties of flaxhemp-reinforced epoxy composites fabricated using compression hand layup technique with different weight fraction of fiber. The fabricated composites have been characterized physically (density and water absorption), thermomechanically (tensile, flexural, thermal conductivity, and dynamical mechanical analysis), and morphologically (scanning electron microscopy [SEM]). The analysis revealed that hemp-reinforced composites (S1) had the highest water absorption capabilities in comparison to the flax-reinforced composites (S5).Higher water absorption capability had an adverse effect on the mechanical properties of fabricated composites. However, hybrid composites (S2, S3, and S4) reported better performance with regard to S1. The increased water content, however, increased the thermal conductivity of composites and maximum has been revealed for S1 (0.82 W/mK) and minimum for S5 (0.48 W/mK). The water molecules showed detrimental effects on the viscoelastic properties and revealed S3 have better interlocking bond with the lowest reduction in storage modulus (12%) and glass transition temperature (4 C) in comparison to S1 (30%) under wet conditions. A comparative analysis of the thermo-mechanical properties was also made for developed composites under dry, saturated, and re-dried conditions. The SEM has been used to characterize the morphological and fracture behavior of the fabricated composites under the influence of water uptake. The effects of water molecules on the hygrothermal aging index and diffusion co-efficient have also been discussed. Overall, the hybridization of

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“…A lot of studies on the water absorption of natural fiber-reinforced polymer composites have been carried out. The degradation effect of water molecules on the composites has been confirmed and the mechanical properties of the composites are affected by the water absorbed [21][22][23][24][25]. It is known that the mechanical properties of the natural fiber-reinforced polymer composites can be improved by the modification of fibers or polymers [26,27].…”

Section: Introductionmentioning

confidence: 85%

Water Absorption and Hygrothermal Aging Behavior of Wood-Polypropylene Composites

et al. 2020

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Environmentally sound composites reinforced with natural fibers or particles interest many researchers and engineers due to their great potential to substitute the traditional composites reinforced with glass fibers. However, the sensitivity of natural fiber-reinforced composites to water has limited their applications. In this paper, wood powder-reinforced polypropylene composites (WPCs) with various wood content were prepared and subjected to water absorption tests to study the water absorption procedure and the effect of water absorbed in the specimens on the mechanical properties. Water soaking tests were carried out by immersion of composite specimens in a container of distilled water maintained at three different temperatures, 23, 60 and 80 °C. The results showed that the moisture absorption content was related to wood powder percentage and they had a positive relationship. The transfer process of water molecules in the sample was found to follow the Fickian model and the diffusion constant increased with elevated water temperature. In addition, tensile and bending tests of both dry and wet composite samples were conducted and the results indicated that water absorbed in composite specimens degraded their mechanical properties. The tensile strength and modulus of the composites reinforced with 15, 30, 45 wt % wood powder decreased by 5.79%, 17.2%, 32.06% and 25.31%, 33.6%, 47.3% respectively, compared with their corresponding dry specimens. The flexural strength and modulus of the composite samples exhibited a similar result. Furthermore, dynamic mechanical analysis (DMA) also confirmed that the detrimental effect of water molecules on the composite specimens.

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Improving moisture durability of flax fibre composites by using non-dry fibres

Cited by 35 publications

References 26 publications

Variability of mechanical properties of flax fibres for composite reinforcement. A review

Variability of mechanical properties of flax fibres for composite reinforcement. A review

Investigation of the effect of water absorption on thermomechanical and viscoelastic properties of flax‐hemp‐reinforced hybrid composite

Water Absorption and Hygrothermal Aging Behavior of Wood-Polypropylene Composites

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