Journal ArticleDOI
Applications of Microfluidic Devices in Food Engineering
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TLDR
In this article, the authors introduce the use of dimensionless numbers to model the physical effects at the micro-fluidic scale, and present different types of geometries to generate multi-phase flows in micro-channels, techniques and materials to construct the microfluidics, as well as methods used to modify surface properties of channels.Abstract:
The design of novel food micro-structures aimed at the quality, health and pleasure markets will probably require unit operations where the scale of the forming device is closer to the size of the structural elements (i.e., 1–100 μm). One emerging possibility is microfluidics or devices that employ small amounts of fluids (10−6 to 10−9 l) flowing in channels where at least one dimension is less than 1 mm. However, under these conditions, the predominant effects are not necessarily those present in conventional macroscopic unit operations. Dominant physical effects at the microfluidic scale are introduced through the use of dimensionless numbers. Different types of geometries to generate multi-phase flows in micro-channels, techniques and materials to construct the micro-devices, principally soft lithography and laser ablation, as well as methods used to modify surface properties of channels, are reviewed. The operation of micro-devices, the role of flow regimes, rheological behaviour of fluids in micro-channels and of transient time is discussed. Finally, systems developed to generate emulsions and foams, fluid mixing and dispersion, and future applications of these devices in food processing and food analysis are presented.read more
Citations
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Microfluidics for food, agriculture and biosystems industries
Suresh Neethirajan,Isao Kobayashi,Mitsutoshi Nakajima,Dan Wu,Saravanan Nandagopal,Francis Lin +5 more
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Nanoencapsulation: a new trend in food engineering processing.
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References
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Journal ArticleDOI
Fabrication of microfluidic systems in poly(dimethylsiloxane)
J.C. McDonald,David C. Duffy,Janelle R. Anderson,Daniel T. Chiu,Hongkai Wu,Olivier Schueller,George M. Whitesides +6 more
TL;DR: Fabrication of microfluidic devices in poly(dimethylsiloxane) (PDMS) by soft lithography provides faster, less expensive routes to devices that handle aqueous solutions.
Journal ArticleDOI
Chaotic Mixer for Microchannels
Abraham D. Stroock,Stephan K. W. Dertinger,Armand Ajdari,Igor Mezic,Howard A. Stone,George M. Whitesides +5 more
TL;DR: This work presents a passive method for mixing streams of steady pressure-driven flows in microchannels at low Reynolds number, and uses bas-relief structures on the floor of the channel that are easily fabricated with commonly used methods of planar lithography.
BookDOI
Capillarity and Wetting Phenomena
TL;DR: The first € price and the £ and $ price are net prices, subject to local VAT as discussed by the authors, and prices and other details are subject to change without notice. All errors and omissions excepted.
Journal ArticleDOI
Formation of dispersions using “flow focusing” in microchannels
TL;DR: In this paper, a flow-focusing geometry is integrated into a microfluidic device and used to study drop formation in liquid-liquid systems, where both monodisperse and polydisperse emulsions can be produced.
Journal ArticleDOI
Cells on chips
TL;DR: Highly integrated microdevices show great promise for basic biomedical and pharmaceutical research, and robust and portable point-of-care devices could be used in clinical settings, in both the developed and the developing world.