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  • Wicking in Paper Strips under Consideration of Liquid Absorption Capacity

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    Kasetsirikul439716-Published.pdf (4.068Mb)
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    Author(s)
    Kasetsirikul, Surasak
    Shiddiky, Muhammad JA
    Nguyen, Nam-Trung
    Griffith University Author(s)
    Kasetsirikul, Surasak
    Shiddiky, Muhammad J.
    Nguyen, Nam-Trung
    Year published
    2020
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    Abstract
    Paper-based microfluidic devices have the potential of being a low-cost platform for diagnostic devices. Electrical circuit analogy (ECA) model has been used to model the wicking process in paper-based microfluidic devices. However, material characteristics such as absorption capacity cannot be included in the previous ECA models. This paper proposes a new model to describe the wicking process with liquid absorption in a paper strip. We observed that the fluid continues to flow in a paper strip, even after the fluid reservoir has been removed. This phenomenon is caused by the ability of the paper to store liquid in its matrix. ...
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    Paper-based microfluidic devices have the potential of being a low-cost platform for diagnostic devices. Electrical circuit analogy (ECA) model has been used to model the wicking process in paper-based microfluidic devices. However, material characteristics such as absorption capacity cannot be included in the previous ECA models. This paper proposes a new model to describe the wicking process with liquid absorption in a paper strip. We observed that the fluid continues to flow in a paper strip, even after the fluid reservoir has been removed. This phenomenon is caused by the ability of the paper to store liquid in its matrix. The model presented in this paper is derived from the analogy to the current response of an electric circuit with a capacitance. All coefficients in the model are fitted with data of capillary rise experiments and compared with direct measurement of the absorption capacity. The theoretical data of the model agrees well with experimental data and the conventional Washburn model. Considering liquid absorption capacity as a capacitance helps to explain the relationship between material characteristics and the wicking mechanism.
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    Journal Title
    Chemosensors
    Volume
    8
    Issue
    3
    DOI
    https://doi.org/10.3390/chemosensors8030065
    Copyright Statement
    © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
    Subject
    Materials engineering
    Publication URI
    http://hdl.handle.net/10072/396643
    Collection
    • Journal articles

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