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Hydrophilic Surface Modification of PDMS Microchannel for O/W and W/O/W Emulsions
- Source :
- Micromachines, Vol 6, Iss 10, Pp 1445-1458 (2015)
- Publication Year :
- 2015
- Publisher :
- MDPI AG, 2015.
-
Abstract
- A surface modification method for bonded polydimethylsiloxane (PDMS) microchannels is presented herein. Polymerization of acrylic acid was performed on the surface of a microchannel using an inline atmospheric pressure dielectric barrier microplasma technique. The surface treatment changes the wettability of the microchannel from hydrophobic to hydrophilic. This is a challenging task due to the fast hydrophobic recovery of the PDMS surface after modification. This modification allows the formation of highly monodisperse oil-in-water (O/W) droplets. The generation of water-in-oil-in-water (W/O/W) double emulsions was successfully achieved by connecting in series a hydrophobic microchip with a modified hydrophilic microchip. An original channel blocking technique to pattern the surface wettability of a specific section of a microchip using a viscous liquid comprising a mixture of honey and glycerol, is also presented for generating W/O/W emulsions on a single chip.
- Subjects :
- microchannel
microplasma
wettability
Mechanical engineering and machinery
TJ1-1570
Subjects
Details
- Language :
- English
- ISSN :
- 2072666X
- Volume :
- 6
- Issue :
- 10
- Database :
- Directory of Open Access Journals
- Journal :
- Micromachines
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.b89f0908205545cea9513aa03f9fc682
- Document Type :
- article
- Full Text :
- https://doi.org/10.3390/mi6101429