| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kamat, Ameya
Delft University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2024Capsule controlled release of crystallisation inhibitors in mortarscitations
- 2024Encapsulated crystallisation inhibitor as a long-term solution to mitigate salt damage in hydraulic mortarscitations
- 2023Tunable chitosan-alginate capsules for a controlled release of crystallisation inhibitors in mortarscitations
- 2023Energy consumption of a laboratory jaw crusher during normal and high strength concrete recyclingcitations
- 2023Experimental Study on Properties of Hydraulic Mortars with Mixed in Crystallisation Inhibitors
- 2023Leaching behaviour of a crystallisation inhibitor in mortarscitations
- 2023A study on leaching of crystallisation inhibitor in mortars
- 2022Effect of a mixed-in crystallization inhibitor on the properties of hydraulic mortarscitations
- 2021Effect Of Alkali Ferrocyanides On Crystallisation Of Sodium Chloride
Places of action
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document
Tunable chitosan-alginate capsules for a controlled release of crystallisation inhibitors in mortars
Abstract
Plasters and renders used in historic monuments are vulnerable to degradation caused by salt weathering. Crystallisation inhibitors (molecules/ions that alter salt crystallisation) mixed into mortars have shown promising results in mitigating salt damage by inhibiting salt crystallisation, promoting salt transport to the evaporating surface, and modifying crystal habit. However, past research suggests that inhibitors easily leach out from mortars, meaning their long-term positive effect is lost. Encapsulation of an inhibitor within a mortar is a potential solution to minimise leaching. Herein, capsules composed of a polyelectrolyte complex of calcium alginate coated in chitosan are investigated for the controlled diffusive release of sodium ferrocyanide, a known NaCl crystallisation inhibitor. Capsules with varying chitosan-calcium alginate ratios are prepared using the extrusion dripping technique. The release of the inhibitor from capsules in solutions of various pH values ranging from 7–13 is investigated. Results show that increasing the capsule’s chitosan to calcium alginate ratio reduces the inhibitor release for all studied solution pH values compared to pure calcium-alginate capsules. Therefore, a controlled inhibitor release can be obtained by tuning the chitosan-alginate ratio. In future, additional tests will be performed to find suitable capsule compositions for optimising their performance when mixed in mortars.