I fabricate polymer solutions with a high viscosity and degass them under vacuum. But when I want to pump these solutions, air bubbles produce again. What is the suitable pump for moving solutions without getting air bubbles.
Dear Foroogh Khodadadi,
the problem is not in the type of the pump but in the operating conditions, there must be conditions which lower air-bubbles formation, knowing the Reinolds and Deborah numbers of the solution help a lot. Sometimes when allowed there are additives that suppress or reduce bubbles. If you need accurate answers you should add some details. Regards
In general, the speed of pumping, fluidity of the pre-gel solution (if it will further form a hydrogel), and its viscosity as well as certain components of the pumped solutions are all among the factors which can cause the formation of bubbles. More clarification is required.
Moreover, you can check this link and may find a solution to your problem:
https://www.researchgate.net/post/How_can_I_avoid_the_formation_of_air_bubbles_when_hydrogels_are_made_by_gamma_irradiation_technique
Dear Abdelkader and Amir Mohammed,
Firstly thanks for your support and time. I fabricate a polymer solution with a high viscosity and then I degass it under vacuum. But when I want to move the solution from the bottle to another place with the pump, air bubbles produce again. I heard there are some kinds of pumps that they do not create air bubbles during transferring solutions. I need the model of the pump.
That depends on how viscous your "viscous" solution actually is. With glycerol and sucrose soultions I found piston-type pumps to perform poorly, peristaltic pumps much better.
Dear Engelbert Buxbaum,
Firstly thanks for your time and reply. The viscosity is about 15 Pa.S in 60 C. It is like a gel in room temperature with 23 Pa. S.
Regards
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