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EnglishHalloysite clay is a natural nanomaterial that is attracting a growing interest in colloidal science. The halloysite aqueous dispersion stability is a key aspect for the configuration of a purification protocol as well as to establish the durability of a formulation. A physico-chemical study demonstrated the role of ionic strength and nanotube characteristic sizes on the sedimentation behavior. We highlighted the importance of the electrostatic repulsions exercised between the particles in the settling process. A protocol for image analysis has been proposed to provide robust information from time resolved optical images on the suspensions. In conclusion, we managed to correlate microscopic aspect to the peculiar sedimentation process of halloysite nanotubes.
Cavallaro G., Lazzara G., Taormina V., & Cascio D. (2019). Sedimentation of halloysite nanotubes from different deposits in aqueous media at variable ionic strengths. COLLOIDS AND SURFACES. A, PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 576, 22-28 [10.1016/j.colsurfa.2019.05.038].
| Data di pubblicazione: | 2019 | |
| Titolo: | Sedimentation of halloysite nanotubes from different deposits in aqueous media at variable ionic strengths | |
| Autori: | ||
| Citazione: | Cavallaro G., Lazzara G., Taormina V., & Cascio D. (2019). Sedimentation of halloysite nanotubes from different deposits in aqueous media at variable ionic strengths. COLLOIDS AND SURFACES. A, PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 576, 22-28 [10.1016/j.colsurfa.2019.05.038]. | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.colsurfa.2019.05.038 | |
| Abstract: | Halloysite clay is a natural nanomaterial that is attracting a growing interest in colloidal science. The halloysite aqueous dispersion stability is a key aspect for the configuration of a purification protocol as well as to establish the durability of a formulation. A physico-chemical study demonstrated the role of ionic strength and nanotube characteristic sizes on the sedimentation behavior. We highlighted the importance of the electrostatic repulsions exercised between the particles in the settling process. A protocol for image analysis has been proposed to provide robust information from time resolved optical images on the suspensions. In conclusion, we managed to correlate microscopic aspect to the peculiar sedimentation process of halloysite nanotubes. | |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| MS_revised.pdf | Versione Editoriale | Open Access Visualizza/Apri | ||
| 1-s2.0-S0927775719304583-main.pdf | Versione Editoriale | Administrator Richiedi una copia |
http://hdl.handle.net/10447/360139
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