Preparation and Stability of Nanofluids

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Preparation and Stability of Nanofluids

Journal Title: 河南科技大学学报（自然科学版） - Year 2016, Vol 37, Issue 1

Abstract

Sodium dodecyl sulfate( SDS) and Arabic gum( AG) were adopted as the dispersant to prepare the Al2O3-water and SiO2-water nanofluids via two steps method. The critical micelle concentration( CMC) of SDS solution at 25 ℃ was determined by ring method. By intelligent suspended matter,the effects of ultrasonic dispersion time,dispersant concentration and dispersant type on the suspension stability of nanofluids were analyzed. The results show that Al2O3-water nanofluids has the best stability in ultrasonic dispersion for 3 hours while the SiO 2-water nanofluids has the best stability in ultrasonic dispersion for 5 hours. Two types of nanofluids have the best stability when the the mass concentration of anionic surface active agent SDS is around CMC. When the high molecular surfactant AG is added in the same as the nanoparticle's mass concentration,two types of nanofluids also have the best stability.

Authors and Affiliations

Hongyu WANG, Zhuliang WANG, Min DU, Li WANG, Zhiyong LING

Keywords

nanofluids; dispersant; stability; critical micelle concentration;

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EP ID EP459889
DOI 10.15926/j.cnki.issn1672-6871.2016.01.002
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