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This platform contains porous media or rock structure chips and its interfacing for use at pressures between 5 and 100 bar. These microfluidic chips can be used in Enhanced Oil Recovery research, reservoir engineering, or environmental research. They are for instance used to verify simulation models of rock-pore structures in the EOR field.
This platform contains chips for Enhanced Oil Recovery, a chip holder, tubing and filters.
|Dimensions||80 mm x 55 mm x 9.5 mm|
|Sealing mechanism||Slide ´n Connect|
|Maximum operation temperature||80°C (Teflon), 50°C (Fused Silica)|
|Max. operating pressure||100 bar|
|Sealing material||PEEK, FEP|
|Contents||50 mm x 500 mm tubing, 5 x nuts, 5 x ferrules|
|Outer Diameter (OD)||1/16 inch|
|Inner Diameter (ID)||250 µm|
|Number of chips per pack||3|
|Distance between channel and top surface||1100 µm|
|Distance between channel and bottom surface||680 µm|
|Total chip thickness||1800 µm|
|Chip size||45 mm x 15 mm|
|Channel width||50 µm|
|Channel height||20 µm|
|Number of Inlets||1|
|Number of outlets||1|
|Inlet/outlet hole sizes on top of the chip||1.70 mm|
|Inlet/outlet holes size at channel||0.60 mm|
|Optical properties||Optically clear view from top and bottom|
|Supplied in Fluidic slide?||Yes|
|Material chip||Borosilicate glass|
|Material black cartridge||Polypropylene|
|Compatible to tubing with diameter||No|
One simple but very effective way to clean a microchip is to flush an alkaline solution through the channels. A solution of 1 M sodium hydroxide in water works well but a lower concentration might also be sufficient. If traces of the cleaning solution remaining inside the chip after cleaning and rinsing with water pose a problem then ammonia can be used instead. Note that these solutions are caustic and can cause damage to e.g. the polyimide coating of fused silica capillaries. Also plastic parts should not be exposed to very alkaline solutions.
In order to aid in the removal of particulate matter, a water bath with ultrasonic agitation can be used, preferably while flushing a watery solution through the channels using a Fluidic connect kit.
Glass microchips can be heated (e.g. >400° C) causing any organic material adsorbed on the glass surface to degrade. Try to use lower temperatures first because burning the content could make it stick. Make sure you only heat the glass chip and not the plastic parts around it.
Concentrated sulphuric acid works well to dissolve organic material such as fibres which are difficult to remove with alkaline solutions, but because of the extremely corrosive nature of the material a cleaning procedure is not so easily implemented.
Please note that chips that were coated by Micronit have different guidelines for cleaning.
Yes, Micronit offers coated, hydrophobic, EOR chips. Unlike most of our other products, these are not visible on the webstore. The reason for this is that we cannot measure if these chips are properly coated. For most chips, we can flow a fluid through to see if the surface wetting behavior is as expected. For EOR chips, because of the dead ends and irregular and parallel shapes, this does not work. This means we can sell the chips with coating, but we cannot guarantee that the coating is spread evenly throughout the chip. The EOR chips would be exposed to the same process for coating as other chips which makes us pretty confident that the chips are well coated, but not certain. If you are willing to take this risk, for example because you can test surface properties yourself, Micronit would be happy to offer coated EOR chips.