Microfluidic production of snowman-shaped Janus hydrogel particles
(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.
(Less)
- author
- Ghosh, Somnath LU and Schurtenberger, Peter LU
- organization
- publishing date
- 2019
- 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
- 2023-11-18 21:32:03
@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}}, keywords = {{Hydrogel particle; Janus particle; Microfluidics}}, 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}}, }