AI Article Synopsis
- The study focuses on the importance of diffusion in creating chemical patterns, particularly in reaction-diffusion systems with hydrogels to prevent convection.
- A specialized cell is used to measure how well strong electrolytes, like sodium and hydrogen ions, diffuse, enabling the calculation of hydrogen ion diffusion in hydrogels.
- The research also includes simulations of ionic diffusion models, which can be adapted for various hydrogels and ions, potentially aiding in innovations like self-healing materials and drug delivery systems.
Article Abstract
The role of diffusion in chemical pattern formation has been widely studied due to the great diversity of patterns emerging in reaction-diffusion systems, particularly in H-autocatalytic reactions where hydrogels are applied to avoid convection. A custom-made conductometric cell is designed to measure the effective diffusion coefficient of a pair of strong electrolytes containing sodium ions or hydrogen ions with a common anion. This together with the individual diffusion coefficient for sodium ions, obtained from PFGSE-NMR spectroscopy, allows the determination of the diffusion coefficient of hydrogen ions in hydrogels. Numerical calculations are also performed to study the behavior of a diffusion-migration model describing ionic diffusion in our system. The method we present for one particular case may be extended for various hydrogels and diffusing ions (such as hydroxide) which are relevant e.g. for the development of pH-regulated self-healing mechanisms and hydrogels used for drug delivery.
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| http://dx.doi.org/10.1039/c7cp00986k | DOI Listing |
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