Length fractionation of boron nitride nanotubes using creamed oil-in-water emulsions

The fractionation by length of multiwalled boron nitride nanotubes (BNNTs) was achieved by emulsification and creaming of an oil/water/surfactant mixture. The length separation is based on the fact that nanoparticle-coated oil droplets polydisperse in size move toward the upper surface or the bottom...

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Détails bibliographiques
Publié dans:Langmuir : the ACS journal of surfaces and colloids. - 1985. - 30(2014), 7 vom: 25. Feb., Seite 1735-40
Auteur principal: Lau, Yiu-Ting R (Auteur)
Autres auteurs: Yamaguchi, Maho, Li, Xia, Bando, Yoshio, Golberg, Dmitri, Winnik, Françoise M
Format: Article en ligne
Langue:English
Publié: 2014
Accès à la collection:Langmuir : the ACS journal of surfaces and colloids
Sujets:Journal Article Research Support, Non-U.S. Gov't Boron Compounds Emulsions Hexanes Polysorbates Water 059QF0KO0R boron nitride 2U4T60A6YD
Description
Résumé:The fractionation by length of multiwalled boron nitride nanotubes (BNNTs) was achieved by emulsification and creaming of an oil/water/surfactant mixture. The length separation is based on the fact that nanoparticle-coated oil droplets polydisperse in size move toward the upper surface or the bottom of an emulsified mixture depending on the density of the droplets, such that droplets of different sizes are located at different heights. By sampling heightwise an unstable hexane/water/Tween 20/BNNT (1-20 μm long) emulsion, we observed that the lengths of the BNNTs adsorbed on the droplets display a strong correlation with the droplets sizes, thus leading to selective separation of the BNNT lengths, as confirmed by dark-field optical imaging and dynamic light scattering. This method may potentially be extended to other high aspect ratio nanomaterials exhibiting emulsification properties similar to those of BNNTs
Description:Date Completed 21.10.2014
Date Revised 26.02.2014
published: Print-Electronic
Citation Status MEDLINE
ISSN:1520-5827
DOI:10.1021/la404961p