Influence of nanoparticle concentration on thermo-physical properties of CuO-propylene glycol nanofluids.

Influence of nanoparticle concentration on thermo-physical properties of CuO-propylene glycol nanofluids.

Journal of nanoscience and nanotechnology (2014-04-18)

Kuppusamy Swaminathan Suganthi, Anju K Radhakrishnan, Natarajan Anusha, Kalpoondi Sekar Rajan

ABSTRACT

Experiments were performed on the preparation and characterization of CuO-propylene glycol nanofluids. The influence of nanoparticle concentration and temperature on nanofluid viscosity reveals existence of a range of nanoparticle concentration and temperature in which the viscosity of nanofluid is lower than that of propylene glycol, possibly due to interactions between nanoparticles and propylene glycol. A temperature-independent, thermal conductivity enhancement of 38% was obtained for nanoparticle concentration of 1.5 vol% over a temperature range of 10-60 degrees C. We believe that particle clustering contributes to the thermal conductivity enhancement in CuO-propylene glycol nanofluids.

MATERIALS

Product Number

Brand

Product Description

PHR1051

Supelco

Propylene glycol, Pharmaceutical Secondary Standard; Certified Reference Material

544868

Sigma-Aldrich

Copper(II) oxide, nanopowder, <50 nm particle size (TEM)

12816

Sigma-Aldrich

Copper, foil, ≥99.8% (complexometric)

326488

Sigma-Aldrich

Copper, beads, 2-8 mm, ≥99.99% trace metals basis

349208

Sigma-Aldrich

Copper, foil, thickness 0.025 mm, 99.98% trace metals basis

349216

Sigma-Aldrich

Copper, wire, diam. 1.0 mm, ≥99.9%

349151

Sigma-Aldrich

Copper, foil, thickness 0.5 mm, 99.98% trace metals basis

349224

Sigma-Aldrich

Copper, wire, diam. 2.0 mm, 99.999% trace metals basis

326410

Sigma-Aldrich

Copper, wire, diam. 0.64 mm, 99.995% trace metals basis

450804

Sigma-Aldrich

Copper(II) oxide, powder, 99.995% trace metals basis

254177

Sigma-Aldrich

Copper, beads, 2-8 mm, 99.9995% trace metals basis

266744

Sigma-Aldrich

Copper, foil, thickness 1.0 mm, 99.999% trace metals basis

W294004

Sigma-Aldrich

Propylene glycol, ≥99.5% (GC), FCC, FG

450812

Sigma-Aldrich

Copper(II) oxide, powder, 99.99% trace metals basis

326429

Sigma-Aldrich

Copper, wire, diam. 0.25 mm, 99.999% trace metals basis

207780

Sigma-Aldrich

Copper, powder, <75 μm, 99%

203130

Sigma-Aldrich

Copper(II) oxide, 99.999% trace metals basis

61139

Sigma-Aldrich

Copper, turnings, purum p.a., ≥99.0%

P4347

Sigma-Aldrich

Propylene Glycol, meets USP testing specifications

1576708

USP

Propylene glycol, United States Pharmacopeia (USP) Reference Standard

GF70966660

Copper - O.F.H.C., wire reel, 10m, diameter 0.125mm, annealed, 99.95+%

GF46869777

Copper - O.F.H.C., foil, 100x100mm, thickness 0.125mm, hard, 99.95+%

GF83531527

Copper - O.F.H.C., wire reel, 50m, diameter 0.5mm, as drawn, 99.95+%

GF53960283

Copper - O.F.H.C., foil, 150x150mm, thickness 0.25mm, annealed, 99.95+%

GF06542153

Copper - O.F.H.C., wire reel, 100m, diameter 0.25mm, as drawn, 99.95+%

GF58721632

Copper - O.F.H.C., foil, 150x150mm, thickness 0.125mm, hard, 99.95+%

540242

Sigma-Aldrich

(R)-(−)-1,2-Propanediol, 96%

417971

Sigma-Aldrich

Copper(II) oxide on alumina, 14-30 mesh, extent of labeling: 13 wt. % loading

GF09925106

Copper - O.F.H.C., wire reel, 5m, diameter 0.25mm, as drawn, 99.95+%

GF69546819

Copper, mesh, 100x100mm, nominal aperture 0.38mm, wire diameter 0.25mm, 40x40 wires/inch, open area 37%, plain weave mesh