PDMS Isopropanol Microfluidics
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- เผยแพร่เมื่อ 30 ก.ย. 2024
- Full procedure can be found at: education.mrse...
Microfluidics deals with the precise control of fluids on the microscale. Often at the microscale, less reagents are used resulting in faster and less expensive laboratories. In this experiment, a fluidic channel is created by casting the PDMS on a master made with puffy paint. PDMS is cured by an organometallic crosslinking reaction to give an optically transparent polymer. Different colored isopropanol is dispensed into the channels to observe fluid mixing.
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What are the dimensions of channel
How did you get the cured PDMS to come out of the dish so easily? When I try the PDMS is stuck to the dish.
Not really into it. But I guess your curred silicone maybe not as flexible. Ratio of components.
Expand me PDMS guyss..
what is the red substance that you use to trace out the area for the mold?
+Tabitha Bailey The description says Puffy paint.
what is the red glue ?
It seems like one step is missing. After step 7, removing the elastomer layer from SU-8 mold, the micro channel block and the glass slide should be cleaned by nitrogen before aligning and bonding them. This should be done to ensure that there is no leak when the fluid is injected in the micro-channels.
May I know why do you apply vacuum to the PDMS?
Is it to remove the air bubbles due to mixing?
Will the viscosity still be the same after applying vacuum? Thks.
I know it's 3 years later and you may had the answer by now but I will post my answer anyway so anyone wondering would benefit from it.
Air bubbles due the mixing is bad after curing because it will create stress point where the PDMS could easily be teared. therefor the vacuum is applied to remove the bubbles. the thinner the PDMS the more effect those bubbles could have.