Modeling of the capillary wicking of flax fibers by considering the effects of fiber swelling and liquid absorption

Testoni, Guilherme Apolinario; Kim, Sihwan; Pisupati, Anurag; Park, Chung

doi:10.1016/j.jcis.2018.04.064

Cited by 21 publications

(15 citation statements)

References 31 publications

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“…In the future studies, the capillary elements developed here can be combined in greater numbers to yield porous devices with yet more complex flow features. The precise tuning of the flow process can be further enhanced by considering external effects such as evaporation [19,20], gravity [21], and swelling of the porous matrix [22,23].…”

Section: Discussionmentioning

confidence: 99%

“…As similar dynamics are involved, the Lucas-Washburn law has been applied to describe the unidirectional capillary flow in homogeneous porous media [16], and has also been modified to analyze non-unidirectional (i.e., radial and hemispherical) capillary flow [17,18]. Moreover, several fundamental and practical aspects of capillary flow in porous media have been the subjects of recent research efforts, including the effects of liquid evaporation [19,20], gravity [21], swelling of the porous matrix [22,23], and fractal and disordered microstructures [24,25]. Additionally, the capillary flow has been utilized as an inverse method to infer the effective properties of porous media, such as the pore size distribution and porosity [26].…”

Section: Introductionmentioning

confidence: 99%

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Tailoring porous media for controllable capillary flow

Liu

Suo

et al. 2019

Journal of Colloid and Interface Science

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HypothesisControl of capillary flow through porous media has broad practical implications. However, achieving accurate and reliable control of such processes by tuning the pore size or by modification of interface wettability remains challenging. Here we propose that the flow of liquid by capillary penetration can be accurately adjusted by tuning the geometry of porous media and develop numerical method to achieve this. Methodologies On the basis of Darcy's law, a general framework is proposed to facilitate the control of capillary flow in porous systems by tailoring the geometric shape of porous structures. A numerical simulation approach based on finite element method is also employed to validate the theoretical prediction. Findings A basic capillary component with a tunable velocity gradient is designed according to the proposed framework. By using the basic component, two functional capillary elements, namely, (i) flow amplifier and (ii) flow resistor, are demonstrated. Then, multi-functional fluidic devices with controllable capillary flow are realized by integrating the designed capillary elements. All the theoretical designs are validated by numerical simulations. Finally, it is shown that the proposed model can be extended to three-dimensional designs of porous media.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tailoring porous media for controllable capillary flow

Liu

Suo

et al. 2019

Journal of Colloid and Interface Science

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“…g/L NaHSO 3 , JFC 1 g/L, [1, 2, 3, 4, 5, 6] g/L PAA-Mg, bleaching at [60, 70, 80, 90, 95, 100] ℃ for [15,30,45,60,75, 90] min with a bath ratio of 25:1. After scouring and bleaching, the samples were removed from the bleaching bath and then rinsed in hot and cool water, respectively, then oven dried under 60 ℃ for 30 min.…”

Section: Scouring and Bleaching Of Ax Rovingmentioning

confidence: 99%

Bleaching flax roving with poly(acrylic acid) magnesium salt as oxygen bleaching stabilizer for hydrogen peroxide

et al. 2021

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“…It is well-known that plant fibres absorb moisture and water [69], but they have also been shown to absorb thermosetting resins. Testoni et al [70] proposed a modified Washburn equation to predict the capillarity behaviour of flax bundles, taking into account the absorption of resin and the swelling as a function of time. Another model was developed by Vo [71], taking into account only the swelling, but considering the dual-scale impregnation of a composite.…”

Section: Capillarity and Swelling Effectsmentioning

confidence: 99%

A Review of Permeability and Flow Simulation for Liquid Composite Moulding of Plant Fibre Composites

et al. 2020

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Liquid composite moulding (LCM) of plant fibre composites has gained much attention for the development of structural biobased composites. To produce quality composites, better understanding of the resin impregnation process and flow behaviour in plant fibre reinforcements is vital. By reviewing the literature, we aim to identify key plant fibre reinforcement-specific factors that influence, if not govern, the mould filling stage during LCM of plant fibre composites. In particular, the differences in structure (physical and biochemical) for plant and synthetic fibres, their semi-products (i.e., yarns and rovings), and their mats and textiles are shown to have a perceptible effect on their compaction, in-plane permeability, and processing via LCM. In addition to examining the effects of dual-scale flow, resin absorption, (subsequent) fibre swelling, capillarity, and time-dependent saturated and unsaturated permeability that are specific to plant fibre reinforcements, we also review the various models utilised to predict and simulate resin impregnation during LCM of plant fibre composites.

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Modeling of the capillary wicking of flax fibers by considering the effects of fiber swelling and liquid absorption

Cited by 21 publications

References 31 publications

Tailoring porous media for controllable capillary flow

Tailoring porous media for controllable capillary flow

Bleaching flax roving with poly(acrylic acid) magnesium salt as oxygen bleaching stabilizer for hydrogen peroxide

A Review of Permeability and Flow Simulation for Liquid Composite Moulding of Plant Fibre Composites

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