Sedimentation of halloysite nanotubes from different deposits in aqueous media at variable ionic strengths

Giuseppe Lazzara, Vincenzo Taormina, Giuseppe Cavallaro, Donato Cascio, Giuseppe Cavallaro, Giuseppe Cavallaro, Giuseppe Lazzara

Risultato della ricerca: Articlepeer review

8 Citazioni (Scopus)

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.
Lingua originaleEnglish
pagine (da-a)22-28
Numero di pagine7
RivistaCOLLOIDS AND SURFACES. A, PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume576
Stato di pubblicazionePublished - 2019

All Science Journal Classification (ASJC) codes

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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