Suspension- and powder-based derivation of Hansen dispersibility parameters for zinc oxide quantum dots--颗粒学报PARTICUOLOGY

Süß, S., Lin, W., Getmanenko, O., Pflug, L., Sobisch, T., Peukert, W., . . . Segets, D. (2019). Suspension- and powder-based derivation of Hansen dispersibility parameters for zinc oxide quantum dots. Particuology, 44, 71-79. https://doi.org/10.1016/j.partic.2018.05.010

Suspension- and powder-based derivation of Hansen dispersibility parameters for zinc oxide quantum dots

Sebastian Süß ^{a b}, Wei Lin ^{a b}, Olga Getmanenko ^a, Lukas Pflug ^c, Titus Sobisch ^d, Wolfgang Peukert ^{a b}, Dietmar Lerche ^d *, Doris Segets ^e *

a Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstr. 4, 91058 Erlangen, Germany
b Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstraße 9a, 91058 Erlangen, Germany
c Institute of Applied Mathematics 2, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 11, 91058 Erlangen, Germany
d LUM GmbH, Justus-von-Liebig Straße 3, 12489 Berlin, Germany
e Process Technology for Electrochemical Functional Materials, Institute for Combustion and Gas Dynamics – Reactive Fluids (IVG), University Duisburg-Essen (UDE), Carl-Benz-Straße 199, 47057 Duisburg, Germany

10.1016/j.partic.2018.05.010

Volume 44, June 2019, Pages 71-79

Received 16 April 2018, Revised 22 May 2018, Accepted 31 May 2018, Available online 23 December 2018, Version of Record 30 April 2019.

E-mail: D.Lerche@lum-gmbh.de; Doris.Segets@uni-due.de

Highlights

• The Hansen parameters for ZnO semiconductor nanoparticles were determined.

• The Hansen parameters of dry powder and a wet sediment were compared.

• Insights into particle- and ligand-induced surface properties are provided.

Abstract

For most particle-based applications, formulation in the liquid phase is a decisive step, and thus, particle interactions and stability in liquid media are of major importance. The concept of Hansen solubility parameters (HSP) was initially invented to describe the interactions of (polymer) molecules and their solubility in different liquids and is increasingly being used in particle technology to describe dispersibility. Because dispersions are not thermodynamically stable, the term Hansen dispersibility parameters (HDP) is used instead of HSP (Süß, Sobisch, Peukert, Lerche, & Segets, 2018). Herein, we extend a previously developed standardized and non-subjective method for determination of Hansen parameters based on analytical centrifugation to the important class of quantum materials. As a technically relevant model system, zinc oxide quantum dots (QDs) were used to transfer our methodology to nanoparticles (NPs) with sizes below 10 nm. The results obtained using the standard procedure starting from a dried powder were compared with those obtained through redispersion from the wet sediment produced during the typical washing procedure of QDs, and drying was observed to play an important role. In conclusion, our study reveals the high potential of HDP for quantifying the interfacial properties of NPs as well as their link to dispersibility.

Graphical abstract

Keywords

Hansen solubility parameter; Functionalization; Semiconductor nanoparticles; Colloidal stability; Quantum material

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