Hydrophilic Surface Modification of PDMS Microchannel for O/W and W/O/W Emulsions
AbstractA 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. View Full-Text
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Bashir, S.; Bashir, M.; Solvas, X.C.; Rees, J.M.; Zimmerman, W.B. Hydrophilic Surface Modification of PDMS Microchannel for O/W and W/O/W Emulsions. Micromachines 2015, 6, 1445-1458.
Bashir S, Bashir M, Solvas XC, Rees JM, Zimmerman WB. Hydrophilic Surface Modification of PDMS Microchannel for O/W and W/O/W Emulsions. Micromachines. 2015; 6(10):1445-1458.Chicago/Turabian Style
Bashir, Shazia; Bashir, Muhammad; Solvas, Xavier C.; Rees, Julia M.; Zimmerman, William B. 2015. "Hydrophilic Surface Modification of PDMS Microchannel for O/W and W/O/W Emulsions." Micromachines 6, no. 10: 1445-1458.