Precise capillary flow for paper-based viscometry
The imbibition dynamics of aqueous solutions in paper substrates determines the performance of all the operations integrated in analytical paper-based devices. In particular, an accurate control of the flow rate is required for quantitative analysis such as viscometry. This work experimentally inves...
| Autores: | , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2016 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/29762 |
| Acceso en línea: | http://hdl.handle.net/11336/29762 |
| Access Level: | acceso abierto |
| Palabra clave: | Paper-Based Microfluidics Capillary Filling Viscometry https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | The imbibition dynamics of aqueous solutions in paper substrates determines the performance of all the operations integrated in analytical paper-based devices. In particular, an accurate control of the flow rate is required for quantitative analysis such as viscometry. This work experimentally investigates paper filling dynamics in order to find a strategy to improve the precision and predictability of the imbibition process. The effect of performing successive wetting-drying cycles on the same strips is explored, since we have discovered that, after around four cycles, the filling kinematics is highly repetitive, and data closely follows the theoretical Lucas-Washburn model. It is found that the cyclic process enables quantitative assessment of the filling dynamics with uncertainties lower than 0.8%. Implementing this protocol, paper-based viscometry with a precision around 1% was experimentally demonstrated. This knowledge is of interest to develop paper-based microfluidic devices with a new level of precision. |
|---|