Another simple way to degas the fluid is to boil it in advance, pump out the
gases, keep the liquid in a sealed vessel and cool it down before use.
This way the liquid will be degassed and remain that way, at least till you
have injected it to your micro-device.

Good luck,

Danny.

P.S. - When you have the time, please post all the answers you have received
- I think that many people may use it.
________________________________

Danny Klein

Department of Mechanical Engineering
Technion - Israel Institute of  Technology
Email: dannykl@technion.ac.il


-----Original Message-----
From: mems-talk-bounces@memsnet.org [mailto:mems-talk-bounces@memsnet.org]
On Behalf Of Manscher Martin
Sent: Tuesday, January 04, 2005 3:21 PM
To: General MEMS discussion
Cc: Manscher Martin
Subject: RE: [mems-talk] How to get rid of the bubbles in
themicrofluidicdevice.

Trapping bubbles, removing bubbles etc. in microfluidic devices is almost a
science in itself (with many articles, patents etc.). The simplest way is
de-gassing the liquid in advance, by pumping on it and exposing it to
ultrasound. If you can accept the presence of the bubbles, having the liquid
run around it, another primitive solution you could try is that sketched in
"A unique solution for preventing clogging of flow channels by gas bubbles",
Kohnle et al, IEEE?? 2002, p. 77

http://www.imtek.de/content/pdf/public/2002/solutionpreventingcloggingfl
owbubbles.pdf

Martin

> -----Original Message-----
> I work on the microfluidic devices. I found it really annoying that
> when I inject the flow there will be always some air bubbles trapped
> in the microfluidic devices (made of PDMS and glass). Is there any way
> to get rid of them?
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