I want to spin coat GO film on the PDMS or PMMA surface, and I did the plasma treatment for PDMS and PMMA. After that, I got the surface with many cracks and very non-uniform hydrophilic, I don't know why and what parameters I can tune. Can you give me some suggestions?
I also saw someone said the APTES can increase the hydrophilic of PDMS, I also did it: 3% APTES dissolved in anhydrous toluene solution and immersed PDMS and PMMA for 12 h. But it only reduced the strength of PDMS.....So can you give me more details about it?
I would guess your plasma was too strong ....
To generate hydrophilic surface you do not very strong and long plasma treatment, sometimes several seconds are sufficient ...
Hope this helps
I fully agree with Gerhard's comments. To be more precisely, the power for a plasma Asher should be around 30 Watts, not higher than 40 Watts. The duration is 30 s. If too short, sometimes the coverage of the surface treatment is not complete.
Thank you all, I have tried again, the results have been improved, thank you very much again.@Xuhua Wang@Gerhard Keller
- Badges
- Science topic