Hi Michael,
I am using glass microchannel with 150 x 150 micrometer cross section.
On Fri, Mar 15, 2013 at 12:11 AM, Michael Martin <
michael.martin@themicrowerks.com> wrote:
> Hi Avinash,
>
> What material are your channels made from? If it is PDMS then you might
> have had them change back to a hydrophobic state. I hear that if a plasma
> activated channel is left in air for even a short time (~hours) at room
> temperature, hydrophobic sections of the polymer will migrate to the
> surface thus creating a larger back pressure and causing hydrophobic
> material in the flow stream to precipitate out. So evidently you should
> keep PDMS chips in water at all times.
>
> Hope this helps,
> Michael
>
>
> On Mar 13, 2013, at 4:41 PM, Avinash sahu wrote:
>
> > hi all,
> > I have some issue related to microchannel hope you can resolve it. Please
> > suggest me the way to remove the blockage and cleaning procedure in
> > microchannel. One of the my microchannel was blocked by bromothymolblue
> dye
> > and Phenolphthalein dye solution and in other channel I had good flows
> like
> > slug, stratified etc at starting but now not even slug flow is not
> comming.
> > The slug flow comes at lower flow like 0.01 - 0.1 ml/min. I am using Y
> > junction mirochip 150x150 micrometer. I tried using Isopropyl alcohol,
> > acetone, 35% HCL,35%H2O2, H2SO4, sonication at 35 Hz and 135 Hz for both
> > cleaning and blockage purpose, nothing is working. Please help me with
> this
> > I will be thankful for you.
> >
> > --
> > Avinash Sahu
> > MS Research Scholar
> > Chemical Engineering
> > IIT Madras (T.N.) 600036
> > 9003387409(M)
> > Profile Page
> > http://www.che.iitm.ac.in/~spush/avinash.html
> > For details on the International Conference Mathematics in Chemical
> > Kinetics and Engineering- please visit
> > http://www.mackie2013.iitm.ac.in/
> > _______________________________________________
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--
Avinash Sahu
MS Research Scholar
Chemical Engineering
IIT Madras (T.N.) 600036
9003387409(M)
Profile Page
http://www.che.iitm.ac.in/~spush/avinash.html
For details on the International Conference Mathematics in Chemical
Kinetics and Engineering- please visit
http://www.mackie2013.iitm.ac.in/
_______________________________________________
Hosted by the MEMS and Nanotechnology Exchange, the country's leading
provider of MEMS and Nanotechnology design and fabrication services.
Visit us at http://www.mems-exchange.org
Want to advertise to this community? See http://www.memsnet.org
To unsubscribe:
http://mail.mems-exchange.org/mailman/listinfo/mems-talk