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- W2902536631 abstract "This work is devoted to study the controlled release of a molecule of interest in an external medium. The molecule is previously adsorbed in an organic porous material, encapsulated in a thin clay layer. The experimental release kinetics is investigated for the organic material and the clay-based material in two external media: pure water and saline solution. A numerical modelling was developed to understand the different phenomena that act on the molecule transfer. The results show that the hydration of the clay-based material reduces the release kinetics. Moreover, it was observed that the molecules are released faster in pure water than in the saline solution. This phenomenon is explained by the osmotic pressure difference on both sides of the clay layer. Ce travail a pour but d'étudier le relargage contrôlé d'une molécule d'intérêt (tryptophane) dans un milieu. Pour cela, la molécule est adsorbée dans un matériau organique poreux, lui-même encapsulé sous une fine couche de type argile. La cinétique de relargage de la molécule est étudiée pour le matériau poreux seul et encapsulé dans deux milieux externes (eau pure et solution saline). Un modèle de connaissance a été réalisé afin de comprendre les différents phénomènes qui gouvernent le transport de la molécule. Les résultats montrent que l'hydratation du matériau encapsulé joue un rôle important dans la vitesse de relargage du tryptophane. De plus, il a été observé que cet acide aminé diffuse plus vite dans l'eau pure que dans la solution saline, ce qui est expliqué par la présence d'un gradient de pression lié à la différence de concentration en sel de part et d'autre de la fine couche argileuse." @default.
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- W2902536631 date "2019-02-01" @default.
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- W2902536631 title "Mass transfer modelling in clay-based material: Estimation of apparent diffusivity of a molecule of interest" @default.
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- W2902536631 doi "https://doi.org/10.1016/j.crci.2018.10.008" @default.
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