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.
Author details: | Rajarshi Roy RajuORCiDGND, Sabine KosmellaGND, Stig E. Friberg, Joachim KoetzORCiDGND |
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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 |