Review on miniaturized paraffin phase change actuators, valves, and pumps

  title={Review on miniaturized paraffin phase change actuators, valves, and pumps},
  author={Sam Ogden and Lena Klintberg and Greger Thornell and Klas Hjort and Roger D. Boden},
  journal={Microfluidics and Nanofluidics},
During the last 15 years, miniaturized paraffin actuation has evolved through the need of a simple actuation principle, still able to deliver large strokes and high actuation forces at small scales. This is achieved by the large and rather incompressible volume expansion associated with the solid-to-liquid phase transition of paraffin. The common approach has been to encapsulate the paraffin by a stiff surrounding that directs the volume expansion toward a flexible membrane, which deflects in a… Expand
The challenge of upscaling paraffin wax actuators
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Corrugated paraffin nanocomposite films as large stroke thermal actuators and self-activating thermal interfaces.
  • D. Copic, A. Hart
  • Materials Science, Medicine
  • ACS applied materials & interfaces
  • 2015
It is shown how a CNT-paraffin film can serve as a self-activating thermal interface that closes a gap when it is heated and could be produced by large-area CNT growth, infiltration, and lamination methods, and are attractive for use in miniature systems due to their self-contained design. Expand
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In production processes, many adjustment tasks have to be carried out manually. In order to automate these activities, there is a need for cost and space efficient actuators that can provideExpand
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A multi-stable miniature paraffin actuator
When paraffin wax melts it exhibits a large, relatively incompressible volume expansion. This can be used in microactuators for strong and large displacements, a rare combination among actuators.Expand
A paraffin driven linear microactuator for high force and large displacement applications
When paraffin wax melts it exhibits a large, relatively incompressible volume expansion. This can be used in microactuators for strong and large displacements, a rare combination among actuators.Expand
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Abstract An actuator that uses the volume expansion related to the solid-to-liquid phase transition of paraffin wax has been fabricated and evaluated. The actuator consists of a ring-shaped paraffinExpand
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We present the potentially strongest micropump in sub-cm/sup 3/ size yet for microfluidics, using simple processes and materials such as epoxy, paraffin, and polyimide. Utilizing the large volumeExpand
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Abstract A new thermally actuated valving concept using paraffin as single-use valving material was developed. The paraffin undergoes a phase transition in response to changes in temperature. AExpand
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Paraffin wax is a promising material in microactuators not only because of its ability of producing large displacements and high forces at the same time but also because of the variety ofExpand
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The development of MEMS actuators is rapidly evolving and continuously new progress in terms of efficiency, power and force output is reported. Pneumatic and hydraulic are an interesting class ofExpand
This paper presents a new yet simple family of microactuators that provide both large displacements ( - m) and high forces ( N) hence suitable for microvalves. The actuators use the high volumetricExpand