This title appears in the Scientific Report :
2018
Please use the identifier:
http://dx.doi.org/10.1021/acs.langmuir.8b01325 in citations.
Structural Analysis of Cellulose-Coated Oil-in-Water Emulsions Fabricated from Molecular Solution
Structural Analysis of Cellulose-Coated Oil-in-Water Emulsions Fabricated from Molecular Solution
Natural cellulose has been used as a coating to stabilize oil-in-water (o/w) emulsions by exploiting the amphiphilic character of the cellulose chains molecularly dissolved in the ionic liquid 1-ethyl-3-methylimidazolium acetate. Its cellulose coating exhibits a continuous amorphous structure which...
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Personal Name(s): | Napso, Sofia (Corresponding author) |
---|---|
Rein, Dmitry M. / Fu, Zhendong / Radulescu, Aurel / Cohen, Yachin | |
Contributing Institute: |
Neutronenstreuung; JCNS-1 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Langmuir, 34 (2018) 30, S. 8857 - 8865 |
Imprint: |
Washington, DC
ACS Publ.
2018
|
DOI: |
10.1021/acs.langmuir.8b01325 |
PubMed ID: |
29979601 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) FRM II / MLZ |
Subject (ZB): | |
Publikationsportal JuSER |
Natural cellulose has been used as a coating to stabilize oil-in-water (o/w) emulsions by exploiting the amphiphilic character of the cellulose chains molecularly dissolved in the ionic liquid 1-ethyl-3-methylimidazolium acetate. Its cellulose coating exhibits a continuous amorphous structure which differs significantly from the cellulose particle stabilization used in Pickering emulsions. The structure of these cellulose-coated o/w emulsion particles, in particular the cellulose coating shell characteristics (thickness, porosity, and composition), is studied by using a combination of direct imaging methods such as cryogenic electron microscopy and fluorescence microscopy with small-angle neutron scattering measurements. This work suggests a unique multicompartment structure of the emulsion particles: an oil core, surrounded by an inner shell composed of a porous cellulose gel, encapsulated by a dense outer cellulose shell, a few nanometers in thickness. The thickness of the inner cellulose shell varies significantly. The nanoscale emulsion droplets exhibit a thickness of 10 ± 3 nm, whereas the larger micron-sized droplets exhibit a thicker inner cellulose shell of 500–750 nm. It is also inferred that the cellulose shells contain water rather than oil. |