Solvent accommodation effect on dispersibility of metal oxide nanoparticle with chemisorbed organic shell

Takaaki Tomai, Naoya Tajima, Motoyuki Kimura, Akira Yoko, Gimyeong Seong, Tadafumi Adschiri

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The dispersibility of nanoparticles in solvents remains difficult to predict and control. In this paper, the dispersibility of organically-modified nanoparticles in various solvents with different solvent properties and molecular sizes are investigated. The study indicates that solvent molecular size, in addition to the affinity between organic modifier and solvent molecules, affects the dispersibility of the nanoparticles. The experimental results imply that solvents with molecular size small enough can disperse nanoparticles more efficiently. In addition, based on the concept that solvent accommodation induces the enhancement of dispersibility, two approaches to improve nanoparticle dispersibility in desired solvents are proposed. One is the addition of a small amount of solvent with the right size and properties to both penetrate the modifier shell and to act as intermediate between the desired solvent and the organic modifier molecules. The other is dual-molecule modification to create additional space at modifier-shell surface for the penetration of the desired solvent molecules. The results of these approaches based on the concept of the solvent accommodation can enhance the dispersibility trends.

Original languageEnglish
Pages (from-to)574-580
Number of pages7
JournalJournal of Colloid And Interface Science
Volume587
DOIs
Publication statusPublished - 2021 Apr

Keywords

  • Dispersion
  • Nanoparticles
  • Solubility parameters
  • Solvent accomodation
  • Surface modification

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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