Investigation of alumina nanofluid stability by UV-vis spectrum

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • R. Sadeghi - , Isfahan University of Technology (Author)
  • S. Gh. Etemad - , Isfahan University of Technology (Author)
  • E. Keshavarzi - , Isfahan University of Technology (Author)
  • M. Haghshenasfard - , Isfahan University of Technology (Author)

Abstract

In this paper, UV-vis spectrum method and dynamic light scattering (DLS) methods were used to evaluate the stability of gamma-Al2O3 nanofluid. The results of DLS method indicate that zeta potential increases by increasing ultrasonic mixing time. After 150 min, zeta potential was 50 mV, which under these conditions the nanofluid was stable. The results also show that the size of the nanoclusters decreases with ultrasonic mixing time. The results obtained by UV-vis spectrum indicate that by increasing the ultrasonic mixing time, the value of maximum absorbency increases and after 30 min, it decreases gradually. After 150 min of ultrasonic mixing time, the maximum absorbency becomes constant. This mixing time can be considered as optimum mixing ultrasonic time.

Details

Original languageEnglish
Pages (from-to)1023-1030
Number of pages8
JournalMicrofluidics and nanofluidics
Volume18
Issue number5-6
Publication statusPublished - May 2015
Peer-reviewedYes
Externally publishedYes

External IDs

Scopus 84939890248
WOS 000353819900024

Keywords

Keywords

  • Dls, Nanofluid, Stability, Thermal conductivity, UV-vis spectrum