6533b86efe1ef96bd12cbf44
RESEARCH PRODUCT
Sedimentation of halloysite nanotubes from different deposits in aqueous media at variable ionic strengths
Donato CascioGiuseppe CavallaroVincenzo TaorminaGiuseppe Lazzarasubject
NanotubeMaterials scienceSedimentation (water treatment)Ionic bondingHalloysite02 engineering and technologyengineering.material010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesHalloysite0104 chemical sciencesNanomaterialsDiffusionColloidColloid and Surface ChemistryChemical engineeringSettlingIonic strengthengineeringImage analysiSedimentationζ potential0210 nano-technologydescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-09-01 | Colloids and Surfaces A: Physicochemical and Engineering Aspects |