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Title: Bicontinuous structured liquids with sub-micrometre domains using nanoparticle surfactants

Bicontinuous jammed emulsions (or bijels) are tortuous, interconnected structures of two immiscible liquids, kinetically trapped by colloidal particles that are irreversibly bound to the oil-water interface. A wealth of applications has been proposed for bijels in catalysis, energy storage and molecular encapsulation, but large domain sizes (on the order of 5 μm or larger) and difficulty in fabrication pose major barriers to their use. Here, we show that bijels with sub-micrometre domains can be formed via homogenization, rather than spinodal decomposition. We achieve this by using nanoparticle surfactants: polymers and nanoparticles of complementary functionality (for example, ion-pairing) that bind to one another at the oil-water interface. This allows the stabilization of the bijel far from the demixing point of the liquids, with interfacial tensions on the order of 20 mN m-1. Furthermore, our strategy is extremely versatile, as solvent, nanoparticle and ligand can all be varied.
Authors:
ORCiD logo ; ; ; ORCiD logo ; ORCiD logo ; ORCiD logo ;
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Nature Nanotechnology
Additional Journal Information:
Journal Volume: 12; Journal Issue: 11; Related Information: © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.; Journal ID: ISSN 1748-3387
Publisher:
Nature Publishing Group
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
OSTI Identifier:
1468343

Huang, Caili, Forth, Joe, Wang, Weiyu, Hong, Kunlun, Smith, Gregory S., Helms, Brett A., and Russell, Thomas P.. Bicontinuous structured liquids with sub-micrometre domains using nanoparticle surfactants. United States: N. p., Web. doi:10.1038/nnano.2017.182.
Huang, Caili, Forth, Joe, Wang, Weiyu, Hong, Kunlun, Smith, Gregory S., Helms, Brett A., & Russell, Thomas P.. Bicontinuous structured liquids with sub-micrometre domains using nanoparticle surfactants. United States. doi:10.1038/nnano.2017.182.
Huang, Caili, Forth, Joe, Wang, Weiyu, Hong, Kunlun, Smith, Gregory S., Helms, Brett A., and Russell, Thomas P.. 2017. "Bicontinuous structured liquids with sub-micrometre domains using nanoparticle surfactants". United States. doi:10.1038/nnano.2017.182. https://www.osti.gov/servlets/purl/1468343.
@article{osti_1468343,
title = {Bicontinuous structured liquids with sub-micrometre domains using nanoparticle surfactants},
author = {Huang, Caili and Forth, Joe and Wang, Weiyu and Hong, Kunlun and Smith, Gregory S. and Helms, Brett A. and Russell, Thomas P.},
abstractNote = {Bicontinuous jammed emulsions (or bijels) are tortuous, interconnected structures of two immiscible liquids, kinetically trapped by colloidal particles that are irreversibly bound to the oil-water interface. A wealth of applications has been proposed for bijels in catalysis, energy storage and molecular encapsulation, but large domain sizes (on the order of 5 μm or larger) and difficulty in fabrication pose major barriers to their use. Here, we show that bijels with sub-micrometre domains can be formed via homogenization, rather than spinodal decomposition. We achieve this by using nanoparticle surfactants: polymers and nanoparticles of complementary functionality (for example, ion-pairing) that bind to one another at the oil-water interface. This allows the stabilization of the bijel far from the demixing point of the liquids, with interfacial tensions on the order of 20 mN m-1. Furthermore, our strategy is extremely versatile, as solvent, nanoparticle and ligand can all be varied.},
doi = {10.1038/nnano.2017.182},
journal = {Nature Nanotechnology},
number = 11,
volume = 12,
place = {United States},
year = {2017},
month = {9}
}

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