A simple route to suspend boric acid in non-polar media
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A simple route to suspend boric acid in non‑polar media Zulhice Tanrıseven1,2 · Ahmet Gül1 · Murat Özayman2 Received: 8 July 2020 / Accepted: 20 August 2020 © Springer Nature Switzerland AG 2020
Abstract It is a very challenging purpose to suspend a nanoparticle in a non-polar medium. In this study, stable nanofluid of nanostructured lamellar boric acid (nBA), which is highly hydrophilic compound (log Kow value is 0.18), to be suspended in non-polar media was successfully prepared. Group III base oil; i.e. mineral base oil, was used for modeling non-polar media. According to characterization examinations, optimal nBA nanofluid adding ratio is found to be 3%. Viscosity analyses were held by Brookfield DV2T® Viscometer. Friction effect of adding the nBA nanofluid into base oil was characterized by a reciprocating tribometer. Stability of nanofluid suspension in base oil was characterized by Turbiscan Tower® instrument. Viscosity of original base oil was decreased by 2.88% at 100 °C, friction coefficient value of base oil was decreased by 2.91%; Turbiscan Stability Index (TSI) values of prepared sample was 2.9. These characterizations showed that boric acid, a highly hydrophobic material, suspended in a non-polar environment with the help of a simple route containing auxiliary chemicals and ultrasonic horn. Graphic abstract
Keywords Suspension · Nanofluids · Boric acid · Nano additives
1 Introduction It is a very challenging purpose to suspend a nanoparticle in a non-polar medium [1, 2]. Nanoparticles have high Gibbs free energy as they have tendencies to form agglomerates, and they are not thermodynamically
stable. Thus it is very difficult to obtain such a suspended solution and the current related literature is still immature on this issue [3]. In current literature, researchers have used several methods to disperse and suspend nanomaterials in the non-polar medium. Widely used methods for this purpose are magnetic stirring, chemical
* Ahmet Gül, [email protected] | 1Department of Chemistry, Technical University of Istanbul, 34469 Maslak, Istanbul, Turkey. 2Tribor Arge, Inc., YTU Ikitelli Teknopark St., Basaksehir, 34490 Istanbul, Turkey. SN Applied Sciences
(2020) 2:1604
| https://doi.org/10.1007/s42452-020-03385-8
Vol.:(0123456789)
Research Article
SN Applied Sciences
(2020) 2:1604
agitation, agitation by ultrasonic shaker, agitation using mechanical ball milling, ultrasonic horn, ultrasonic bath, adding surfactant and surface modification of nanoparticles [4–7]. In this study, we provide the suspension of boric acid in non-polar medium by preparing a stable nanofluid of boric acid. This boric acid nanofluid was prepared by practical and easy methods (by adding chemicals and using ultrasonic horn) without chemical modification. The chemicals that constitute the base liquid of the nanofluid were selected from substances that will help the suspension of boric acid in a non-polar environment. Two-step process method was followed to prepare nBA nanofluid. Two-step process method implies the fact th
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