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Cited by 261

The DOI matches its Crossref record; 28 of the 28 references it cites were found in a registry or an index.

Colloidal Stabilization of Nanoparticles in Concentrated Suspensions

Open access
Studart, André R., Amstad, Esther, Gauckler, Ludwig J.·2007·Langmuir
DOI 10.1021/la062042s
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Abstract

The stabilization of nanoparticles in concentrated aqueous suspensions is required in many manufacturing technologies and industrial products. Nanoparticles are commonly stabilized through the adsorption of a dispersant layer around the particle surface. The formation of a dispersant layer (adlayer) of appropriate thickness is crucial for the stabilization of suspensions containing high nanoparticle concentrations. Thick adlayers result in an excessive excluded volume around the particles, whereas thin adlayers lead to particle agglomeration. Both effects reduce the maximum concentration of nanoparticles in the suspension. However, conventional dispersants do not allow for a systematic control of the adlayer thickness on the particle surface. In this study, we synthesized dispersants with a molecular architecture that enables better control over the particle adlayer thickness. By tailoring the chemistry and length of these novel dispersants, we were able to prepare fluid suspensions (viscosity < 1 Pa.s at 100 s-1) with more than 40 vol % of 65-nm alumina particles in water, as opposed to the 30 vol % achieved with a state-of-the-art dispersing agent. This remarkably high concentration facilitates the fabrication of a wide range of products and intermediates in materials technology, cosmetics, pharmacy, and in all other areas where concentrated nanoparticle suspensions are required. On the basis of the proposed molecular architecture, one can also envisage other similar molecules that could be successfully applied for the functionalization of surfaces for biosensing, chromatography, medical imaging, drug delivery, and aqueous lubrication, among others.

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Metadata

Authors
Studart, A. R., Amstad, E., & Gauckler, L. J.
Venue
Langmuir
Publisher
American Chemical Society (ACS)
Published
2006-12-20
Volume
23
Issue
3
Pages
1081-1090
ISSN
  • 0743-7463 (ISSN-L)
  • 1520-5827
DOI
10.1021/la062042s
OpenAlex
W2071154330
Cited by
261
References
28
FWCI
4.77
Type
journal article
Language
en
Open access
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