Microfluidic production of snowman-shaped Janus hydrogel particles

Somnath Ghosh; Peter Schurtenberger

doi:10.1016/j.colsurfa.2019.04.034

Microfluidic production of snowman-shaped Janus hydrogel particles

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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 form self-assembled structures.

Original language	English
Pages (from-to)	205-210
Number of pages	6
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	573
DOIs	https://doi.org/10.1016/j.colsurfa.2019.04.034
Publication status	Published - 2019

Subject classification (UKÄ)

Nano-technology

Free keywords

Hydrogel particle
Janus particle
Microfluidics

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10.1016/j.colsurfa.2019.04.034

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title = "Microfluidic production of snowman-shaped Janus hydrogel particles",

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 form self-assembled structures.",

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doi = "10.1016/j.colsurfa.2019.04.034",

language = "English",

volume = "573",

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journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",

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T1 - Microfluidic production of snowman-shaped Janus hydrogel particles

AU - Ghosh, Somnath

AU - Schurtenberger, Peter

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - Hydrogel particle

KW - Janus particle

KW - Microfluidics

U2 - 10.1016/j.colsurfa.2019.04.034

DO - 10.1016/j.colsurfa.2019.04.034

M3 - Article

AN - SCOPUS:85065033649

SN - 0927-7757

VL - 573

SP - 205

EP - 210

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

ER -

Microfluidic production of snowman-shaped Janus hydrogel particles

Abstract

Subject classification (UKÄ)

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