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Pickering Janus emulsions and polyelectrolyte complex-stabilized Janus gels

  • Janus emulsions, containing olive oil (OO) and silicone oil (SiO), were formed in presence of polyelectrolyte complex particles, i.e., gelatin-sodium polyacrylate (NaPAA) complexes. The diameter of completely engulfed Janus droplets can be tuned between 50 and 200 mu m by varying the gelatin/NaPAA complex particle size between 200 and 400 nm. The gelatin/NaPAA complex particles adsorbed at the olive oil interface decrease the interfacial tension and stabilize the resulting completely engulfed Pickering Janus emulsions. Long-term stable Janus gels can be synthesized in presence of gelatin/sodium carboxymethylcellulose (NaCMC) mixtures. In that case Coulombic forces are of relevance with regard to the stabilization of the Janus droplets embedded in a gelatin/NaCMC gel matrix. Janus gels show elastic reological behavior and thixotropic properties.

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Metadaten
Author details:Rajarshi Roy RajuORCiDGND, Sabine KosmellaGND, Stig E. Friberg, Joachim KoetzORCiDGND
DOI:https://doi.org/10.1016/j.colsurfa.2017.08.022
ISSN:0927-7757
ISSN:1873-4359
Title of parent work (English):Colloids and surfaces : an international journal devoted to the principles and applications of colloid and interface science ; A, Physicochemical and engineering aspects
Publisher:Elsevier
Place of publishing:Amsterdam
Publication type:Article
Language:English
Year of first publication:2017
Publication year:2017
Release date:2020/04/20
Tag:Gelatin-NaCMC; Gelatin-NaPAA composites; Interfacial tension; Janus gels; Pickering Janus emulsions; Ring tensiometry
Volume:533
Number of pages:8
First page:241
Last Page:248
Funding institution:Polymer Science Program (Country of Brandenburg)
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer review:Referiert
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