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Microfluidic production of snowman-shaped Janus hydrogel particles

Ghosh, Somnath LU and Schurtenberger, Peter LU (2019) In Colloids and Surfaces A: Physicochemical and Engineering Aspects 573. p.205-210
Abstract

We present a simple microfluidic-based synthesis protocol to fabricate snowman like Janus hydrogel particles of poly(N-isopropylacrylamide) (PNIPAM) in micron length scale. Particles are synthesized by emulsifying a hydrogel solution (water (w)/oil (o)) followed by partial solvent evaporation. Solvent evaporation allows the hydrogels to concentrate within the droplet and phase separate into a monomer-abundant and a sparse phase. Due to the difference in interfacial tension and chemical properties of the two phases, emulsion droplets are deformed into snowman like Janus droplets. After cross-linking the monomer by UV irradiation, the particles are transferred into water. The resulting Janus colloids exhibit thermo-responsive behavior and... (More)

We present a simple microfluidic-based synthesis protocol to fabricate snowman like Janus hydrogel particles of poly(N-isopropylacrylamide) (PNIPAM) in micron length scale. Particles are synthesized by emulsifying a hydrogel solution (water (w)/oil (o)) followed by partial solvent evaporation. Solvent evaporation allows the hydrogels to concentrate within the droplet and phase separate into a monomer-abundant and a sparse phase. Due to the difference in interfacial tension and chemical properties of the two phases, emulsion droplets are deformed into snowman like Janus droplets. After cross-linking the monomer by UV irradiation, the particles are transferred into water. The resulting Janus colloids exhibit thermo-responsive behavior and form self-assembled structures.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hydrogel particle, Janus particle, Microfluidics
in
Colloids and Surfaces A: Physicochemical and Engineering Aspects
volume
573
pages
6 pages
publisher
Elsevier
external identifiers
  • scopus:85065033649
ISSN
0927-7757
DOI
10.1016/j.colsurfa.2019.04.034
language
English
LU publication?
yes
id
1e92b1f9-f8e6-48ff-a0f7-a53a19ba5d7f
date added to LUP
2019-05-13 12:15:18
date last changed
2019-11-20 05:43:12
@article{1e92b1f9-f8e6-48ff-a0f7-a53a19ba5d7f,
  abstract     = {<p>We present a simple microfluidic-based synthesis protocol to fabricate snowman like Janus hydrogel particles of poly(N-isopropylacrylamide) (PNIPAM) in micron length scale. Particles are synthesized by emulsifying a hydrogel solution (water (w)/oil (o)) followed by partial solvent evaporation. Solvent evaporation allows the hydrogels to concentrate within the droplet and phase separate into a monomer-abundant and a sparse phase. Due to the difference in interfacial tension and chemical properties of the two phases, emulsion droplets are deformed into snowman like Janus droplets. After cross-linking the monomer by UV irradiation, the particles are transferred into water. The resulting Janus colloids exhibit thermo-responsive behavior and form self-assembled structures.</p>},
  author       = {Ghosh, Somnath and Schurtenberger, Peter},
  issn         = {0927-7757},
  language     = {eng},
  pages        = {205--210},
  publisher    = {Elsevier},
  series       = {Colloids and Surfaces A: Physicochemical and Engineering Aspects},
  title        = {Microfluidic production of snowman-shaped Janus hydrogel particles},
  url          = {http://dx.doi.org/10.1016/j.colsurfa.2019.04.034},
  doi          = {10.1016/j.colsurfa.2019.04.034},
  volume       = {573},
  year         = {2019},
}