Preparation and Stability Analysis of Water Based Al2O3, TiO2 and ZnO Nanofluids

Yıl 2017, Cilt: 2 Sayı: 1, 70 - 78, 25.02.2017

Adnan Topuz

Öz

For nanofluids to be able to use practically, they
must not cluster and precipitate. Namely, they have to become stable. The
target of this study is to determine the parameters that are effective at
preparing stable nanofluid and to obtain stable one.To follow nanofluid
stability, its sedimentation state is determined by photo capturing and
controlling continuously. It is verified by SEM images that the nanofluids,
which do not precipitate and are determined as stable, are distributed
homogeneously and do not constitute considerable agglomerates.

The work fluid is made from Al₂O₃,
TiO₂, ZnO nanoparticles and deionized water as base fluid. The
solutions are prepared with 0.1%, 0.3%, 0.5%, 0.7% and 1.0% volume
concentration. They are mixed 30 minutes by probe type of ultrasonic
homogenizer at environment conditions. Sodium Dodecyl Sulfate (SDS) was added
to the solutions as surfactant to prevent instability occurred due to
agglomeration and sedimentation.

At this study, it is investigated that from where the
contradictory data for stability experiments in the literature stems. Moreover,
the various stable nanofluid preparation parameters that are not available in
the literature are given.It is observed that Al₂O₃, TiO₂
and ZnO nanofluids have stability up to 5 days, 7 days and 21 days without
considerably sedimentation, respectively. It is ascertained that properties of
nanoparticle and nanofluid preparation parameters are important to enable
stability.

Anahtar Kelimeler

Al2O3, TiO2, ZnO, Nanofluid, Stability, Surfactant

Kaynakça

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