Elastocapillarity: Stress transfer through fibrous probes in wicking experiments

Monaenkova, Daria; Kornev, Konstantin G.

doi:10.1016/j.jcis.2010.04.001

Cited by 10 publications

(10 citation statements)

References 38 publications

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“…Others have paid attention on modifying the electrospun nanofiber mats 5–9. Although some works are have been carried out on studying the physical and mechanical properties of the electrospun nanofibers,10–17 further investigations are necessary for studying the structure‐related parameters with respect to the end uses.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of polyurethane electrospun nanofiber membranes for protective clothing applications

Gorji

Jeddi

Gharehaghaji

2012

J of Applied Polymer Sci

162

127

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Electrospun nanofibrous webs are important in nanotechnology applications due to their high surface area and interconnected porosity. In this study, the effect of electrospinning duration on some physical and mechanical properties of polyurethane (PU) electrospun webs is investigated for potential applications such as protective clothing and membranes. The results show that the thickness and weight of webs and subsequently their tensile strength increase linearly with the electrospinning duration. Air permeability of nanofibrous webs decrease and hydrostatic pressure increases nonlinearly while water vapor permeability remains constant. This work shows that air permeability of PU webs follows Fick's law of diffusion. Some regression models have been proposed to describe electrospun membranes behavior. The results of this investigation indicate that this new generation of nanofibrous materials has a good potential for application as membrane in protective clothing. V C 2012 Wiley Periodicals, Inc. J Appl Polym Sci 125: [4135][4136][4137][4138][4139][4140][4141] 2012

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Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of polyurethane electrospun nanofiber membranes for protective clothing applications

Gorji

Jeddi

Gharehaghaji

2012

J of Applied Polymer Sci

162

127

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“…This equation was derived from Darcy's law 15 and implies that the pressure in the liquid column drops linearly from zero at the liquid source, s ¼ 0, to ÀP c at the wetting front, s ¼ s Ã . The impregnation of nanoporous materials is driven mostly by the capillary pressure, [24][25][26] i.e.…”

Section: Fabric Profile and Forces Acting On Wet And Dry Partsmentioning

confidence: 99%

“…12 Other examples include buckling of carbon nanotubes exposed to the water vapor 13 and deformations of the nanoporous yarns transporting the wetting liquids. 14,15 The level of stresses in wearable textiles due to the elasto-capillary effect 15 is comparable with stresses which fabric encounters during its daily use. 6,16 Since the mechanical properties of textile material is one of the key features affecting the material performance, 6 an understanding of the influence of the liquid on the stressed state of the wetted fabric is important.…”

mentioning

confidence: 99%

Bernoulli catenary and elasto-capillary effect in partially wet fibrous materials

Monaenkova

Andrukh

Kornev

2013

Textile Research Journal

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When a wetting liquid wicks into a fibrous material, it causes the material to deform. In this paper we discuss the elasto-capillary effect that leads to spontaneous internal stresses in the materials. The elasto-capillary effect produced by menisci in pores can be identified through a specific stress distribution in the fibrous matrix. We show that the classical Bernoulli problem of a freely hanging fabric can be used for the analysis of gravity-induced stresses in textile materials. These stresses change due to elasto-capillary effect. Wicking of a wetting liquid into a freely suspended fibrous material is shown to be an instructive nontrivial experiment illustrating interesting distinguishable stress distributions in the fibrous matrix.

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“…Liquid spreading and wicking phenomena can change on the dusty layer depending on the layer structure on the hydrophobic surfaces. Capillary force variation due to composite wick structure has been investigated previously 14 – 16 . Hydrostatic pressure loss is associated with the flow resistance in the porous-like structure and wetted height and spreading velocity of liquid change with the permeability of the structure.…”

Section: Introductionmentioning

confidence: 99%

“…Dust forms porous-like structures in outdoor environments by time and excessive dust accumulations on the surfaces can limit the efficient dust removal from surfaces by rolling/sliding droplets. The wicking condition pertinent to porous-like structures is presented earlier [14][15][16][17][18][19][20] , however, a droplet rolling/sliding on porous structures, due to dust settlement on the hydrophobic surfaces, have not been investigated. In addition, as the accumulated dust height increases, the area of hydrophobic surface exposing to droplet interface becomes small and droplet rolling/sliding characteristics change, i.e.…”

mentioning

confidence: 99%

A water droplet-cleaning of a dusty hydrophobic surface: influence of dust layer thickness on droplet dynamics

Hassan

Yilbaş

Bahatab

et al. 2020

Sci Rep

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Water droplet cleaning of a dusty hydrophobic surface is examined. Environmental dust are used in the experiments and cloaking velocity of a dust layer by a droplet fluid is measured and hemi-wicking conditions for the dust layer are analyzed adopting the pores media wick structure approach. A droplet motion on dusty and inclined hydrophobic surface is analyzed using a high speed digital imaging system. Influences of dust layer thickness, droplet volume, and surface inclination angle on the mechanisms of dust removal by a rolling droplet are evaluated. The findings revealed that dust cloaking velocity decreases exponentially with time. The droplet fluid can cloak the dust layer during its transition on the dusty surface. The transition period of droplet wetted length on the dusty surface remains longer than the cloaking time of the dust layer by the droplet fluid. Translational velocity of rolling droplet is affected by the dust layer thickness, which becomes apparent for small volume droplets. Small volume droplet (20 µL) terminates on the thick dust layer (150 µm) at low surface inclination angle (1°). The quantity of dust picked up by the rolling droplet increases as the surface inclination angle increases. The amount of dust residues remaining on the rolling droplet path is relatively larger for the thick dust layer (150 µm) as compared to its counterpart of thin dust layer (50 µm).

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Elastocapillarity: Stress transfer through fibrous probes in wicking experiments

Cited by 10 publications

References 38 publications

Fabrication and characterization of polyurethane electrospun nanofiber membranes for protective clothing applications

Fabrication and characterization of polyurethane electrospun nanofiber membranes for protective clothing applications

Bernoulli catenary and elasto-capillary effect in partially wet fibrous materials

A water droplet-cleaning of a dusty hydrophobic surface: influence of dust layer thickness on droplet dynamics

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