Imbibition of Liquids through a Paper Substrate in a Controlled Environment

Mahapatra, Pallab Sinha

doi:10.1021/acs.langmuir.2c00318

Cited by 14 publications

(12 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The classical Lucas–Washburn expression was developed for liquid flow through capillary tubes. Later, the capillary rise formulation was modified by incorporating the effects of evaporation (from the surface) and swelling (of the fibers) . However, all modifications were based on the basic assumptions for a capillary tube, with the fiber orientations in a porous substrate, e.g., fabric or paper, not being considered.…”

Section: Passive Liquid-transport Mechanismsmentioning

confidence: 99%

“…Later, the capillary rise formulation was modified by incorporating the effects of evaporation (from the surface) and swelling (of the fibers). 137 However, all modifications were based on the basic assumptions for a capillary tube, with the fiber orientations in a porous substrate, e.g., fabric or paper, not being considered. Models capable of addressing time-dependent variation of porosity, permeability, and dynamic contact angle are lacking in the literature.…”

Section: Plasma Treatmentmentioning

confidence: 99%

See 1 more Smart Citation

Patterning Wettability for Open-Surface Fluidic Manipulation: Fundamentals and Applications

et al. 2022

Self Cite

View full text Add to dashboard Cite

Effective manipulation of liquids on open surfaces without external energy input is indispensable for the advancement of point-of-care diagnostic devices. Open-surface microfluidics has the potential to benefit health care, especially in the developing world. This review highlights the prospects for harnessing capillary forces on surface-microfluidic platforms, chiefly by inducing smooth gradients or sharp steps of wettability on substrates, to elicit passive liquid transport and higher-order fluidic manipulations without off-the-chip energy sources. A broad spectrum of the recent progress in the emerging field of passive surface microfluidics is highlighted, and its promise for developing facile, low-cost, easy-to-operate microfluidic devices is discussed in light of recent applications, not only in the domain of biomedical microfluidics but also in the general areas of energy and water conservation.

show abstract

Section: Passive Liquid-transport Mechanismsmentioning

confidence: 99%

Section: Plasma Treatmentmentioning

confidence: 99%

Patterning Wettability for Open-Surface Fluidic Manipulation: Fundamentals and Applications

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Paper strips ( 30 × 6 mm 2 ) are taken and multiple experiments are performed using a paper holding setup. As the liquid flows through the whole horizontal paper section within 30 s, in the case of only paper, the conventional Lucas-Washburn analytical model (without gravity) is applicable 16,80 . In this model, the force balance is considered between the capillary force and the viscous resistance force, where the capillary height (L) is related to time (t) as, L ∝ t 0.5 .…”

Section: Design Selectionmentioning

confidence: 99%

3D Paper-based milk adulteration detection device

Datta

Mahapatra

2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

Milk adulteration is a common problem in developing countries, and it can lead to fatal diseases in humans. Despite several studies to identify different adulterants in milk samples, the effects of multiple adulterants remain unexplored. In this work, a three-dimensional (3D) paper-based microfluidic device is designed and fabricated to simultaneously detect multiple chemical adulterants in milk. This device comprises a top cover, a bottom cover, and a middle layer composed of transportation and a detection zone. By making cuts on the middle layer’s support, the device’s flow path is characterised by optimum and uniform velocity. For the first time, seven adulterants (urea, detergents, soap, starch, hydrogen peroxide, sodium-hydrogen-carbonate, and salt) are detected in the milk sample simultaneously with specificity evaluation and detailed color interference analysis. Only 1–2 mL of sample volume is required to detect 7 adulterants at one time. We have used only 10 $$\upmu$$ μ L of the reagent’s volume for the colorimetric reaction and found the results within a few seconds. Observation reveals that the limit of detection (LOD) of the adulterants lies in the range between $$0.05\%$$ 0.05 % (vol./vol.) to $$0.2\%$$ 0.2 % (vol./vol.) using the colorimetric detection technique. The unknown quantity of the added adulterants is measured using the calibration curves obtained from the experiments results. The repeatability and reproducibility of the process, sensitivity, and the linear range of detection of the calibration curves and the statistical study of the color intensity data are thoroughly analysed herein. In any resource-limited setting, this simple, portable, and user-friendly 3D microfluidic device is expected to be used for testing liquid foods before consumption.

show abstract

“…[13], [32] The environment can play a role in the fluid flow properties of woven meshes, particularly through its effect on evaporation from the wick. [33] Changes in temperature and relative humidity can alter the radius of curvature of the liquid-vapor interface as described by the Kelvin equation. [34] Above a certain capillary pressure in a given porous structure, a percolating liquid phase no longer exists and the relative permeability drops to zero.…”

Section: Introductionmentioning

confidence: 99%

Permeability of Single-Layer-Free-Standing Meshes at Varying Capillary Pressure via a Novel Method

Shattique¹,

Giglio²,

Dede³

et al. 2023

Preprint

View full text Add to dashboard Cite

The permeability of mesh wicks is important for various applications, for example two-phase heat transfer. However, our understanding of the permeability of single-layer, free-standing mesh wicks (SLFSMW), with liquid-gas interfaces on both sides, is limited. We present a novel and simpler method to determine the permeability of a SLFSMW and apply it to a representative mesh. Our method involves modifying the capillary pressures elevation and simultaneously measuring the permeability to determine the permeability-capillary pressure relationship. When applied to a copper mesh with plain weave having undergone careful surface cleaning, the permeability is found to decrease as capillary pressure for deionized (DI) water increases. We present dimensional analysis to generalize our data for other mesh sizes with similar weaves, and fluids. We model the behavior of mesh in application based on the integration of Darcy’s law with an analytic function fit to measured data and conduct parametric studies to investigate the superficial velocity of liquids through the mesh under varying driving pressures, transport lengths, and liquid viscosity based on the obtained capillary pressure-permeability relationship. This study provides valuable insights into the transport properties of mesh wicks, with potential applications in fields such as electronics cooling, electrochemical devices, and fluid purification technologies.

show abstract

Imbibition of Liquids through a Paper Substrate in a Controlled Environment

Cited by 14 publications

References 58 publications

Patterning Wettability for Open-Surface Fluidic Manipulation: Fundamentals and Applications

Patterning Wettability for Open-Surface Fluidic Manipulation: Fundamentals and Applications

3D Paper-based milk adulteration detection device

Permeability of Single-Layer-Free-Standing Meshes at Varying Capillary Pressure via a Novel Method

Contact Info

Product

Resources

About