The effects of particle concentration, ionic strength and shearing on the microstructure of alumina nanorod suspensions

Seokwon Kim, Chongyoup Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In the present study we investigated the microstructure of suspensions of alumina nanorods while varying particle loading and pH. The diameter and length of rod particles were 10 and 50 nm, respectively and particle loading was varied from 1 to 5 vol%. Using the optical microscopy, dynamic light scattering, Turbiscan and rheological measurement, we showed that the suspensions existed as weakly flocculated gels at pH = 4 while they became strongly flocculated gels when pH was 7 or 11. The cryo-SEM images confirmed that the rod suspensions had gel structures. Strong shearing by milling or sonication changed the microstructure to a certain degree but the basic honeycomb structure was maintained.

Original languageEnglish
Pages (from-to)65-71
Number of pages7
JournalKorea Australia Rheology Journal
Volume24
Issue number1
DOIs
Publication statusPublished - 2012 Mar 1

Fingerprint

Aluminum Oxide
Ionic strength
Nanorods
shearing
Shearing
nanorods
Suspensions
Alumina
Gels
aluminum oxides
gels
microstructure
Microstructure
rods
Honeycomb structures
honeycomb structures
Sonication
Milling (machining)
Dynamic light scattering
Optical microscopy

Keywords

  • Cryo-SEM
  • Dynamic light scattering
  • Gel
  • Honeycomb
  • Microscopy
  • Turbiscan

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Science(all)

Cite this

The effects of particle concentration, ionic strength and shearing on the microstructure of alumina nanorod suspensions. / Kim, Seokwon; Kim, Chongyoup.

In: Korea Australia Rheology Journal, Vol. 24, No. 1, 01.03.2012, p. 65-71.

Research output: Contribution to journalArticle

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