Skip to Content
Merck
  • Amphiphilic Pickering Emulsifiers Based on Mushroom-Type Janus Particles.

Amphiphilic Pickering Emulsifiers Based on Mushroom-Type Janus Particles.

Langmuir : the ACS journal of surfaces and colloids (2015-07-15)
E Passas-Lagos, F Schüth
PMID26152905
ABSTRACT

Iron-based mushroom-type Janus particles consisting of a poly(sytrene-co-divinylbenzene) and a silica moiety both with controllable morphologies were successfully synthesized on the gram scale and investigated as surfactants for Pickering emulsions. Two oil-water model systems, namely toluene-water and vegetable oil-water, were stabilized, giving mainly water-in-oil (w/o) emulsions. By varying several parameters, including Janus particle morphologies and the oil-water ratio, fine-tuning of the emulsion systems was possible; it was even possible to invert the continuous phase to an oil-in-water (o/w) system. Furthermore, the emulsions were stable against coalescence and sedimentation and could be easily separated by centrifugation or a strong magnet. The synthesized mushroom-type Janus particles are suitable for creating Pickering emulsions and can be used as building blocks for creating nanostructures with tailored properties for specific applications.

MATERIALS
Product Number
Brand
Product Description
83697
Sigma-Aldrich
Rhodamine 6G, suitable for fluorescence, BioReagent
414565
Sigma-Aldrich
Divinylbenzene, technical grade, 80%
W292907
Sigma-Aldrich
Isopropyl alcohol, ≥99.7%, FCC, FG
169099
Sigma-Aldrich
Divinylbenzene, technical grade, 55%
151238
Sigma-Aldrich
Glycidyl methacrylate, 97%, contains 100 ppm monomethyl ether hydroquinone as inhibitor
252433
Sigma-Aldrich
Rhodamine 6G, Dye content 99 %
62840
Sigma-Aldrich
L-Lysine, crystallized, ≥98.0% (NT)
L5501
Sigma-Aldrich
L-Lysine, ≥98% (TLC)
S4972
Sigma-Aldrich
Styrene, ReagentPlus®, contains 4-tert-butylcatechol as stabilizer, ≥99%
R4127
Sigma-Aldrich
Rhodamine 6G, Dye content ~95 %
779342
Sigma-Aldrich
Glycidyl methacrylate, ≥97.0% (GC)
747343
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 5 nm avg. part. size (TEM), amine functionalized, 1 mg/mL Fe in H2O, dispersion
747319
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 10 nm avg. part. size (TEM), PEG functionalized, 1 mg/mL Fe in H2O, dispersion
747254
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 10 nm avg. part. size (TEM), carboxylic acid functionalized, 5 mg/mL Fe in H2O, dispersion
790508
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 5 nm avg. part. size (TEM), PEG functionalized, 1 mg/mL Fe in H2O, dispersion
747327
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 30 nm avg. part. size (TEM), amine functionalized, 1 mg/mL Fe in H2O, dispersion
700320
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 5 nm avg. part. size, 5 mg/mL in toluene
733458
Sigma-Aldrich
2-Propanol, electronic grade, 99.999% trace metals basis
700304
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 20 nm avg. part. size, 5 mg/mL in toluene
700312
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 10 nm avg. part. size, 5 mg/mL in toluene
725331
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 5 nm avg. part. size, 5 mg/mL in H2O
725366
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 20 nm avg. part. size, 5 mg/mL in H2O
725358
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 10 nm avg. part. size, 5 mg/mL in H2O
310069
Sigma-Aldrich
Iron(II,III) oxide, powder, <5 μm, 95%
518158
Sigma-Aldrich
Iron(II,III) oxide, 99.99% trace metals basis
59304
Sigma-Aldrich
2-Propanol, BioUltra, for molecular biology, ≥99.5% (GC)
09913
Sigma-Aldrich
Ammonium persulfate, BioUltra, for molecular biology, ≥98.0% (RT)
A7460
Sigma-Aldrich
Ammonium persulfate, BioXtra, ≥98.0%
747408
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 30 nm avg. part. size (TEM), PEG functionalized, 1 mg/mL Fe in H2O, dispersion
747300
Sigma-Aldrich
Iron oxide(II,III), magnetic nanoparticles solution, 10 nm avg. part. size (TEM), amine functionalized, 1 mg/mL Fe in H2O, dispersion