How to make PDMS membranes
PDMS is the acronym for polydimethylsiloxane which is a liquid silicon-based organic polymer. A cross-linking agent is added to the polymer to get a solid and rubbery compound. We can give any shape to the solid compound by pouring the polymer/cross-linker solution in a mold. The stiffness can be controlled by the concentration of the cross-linking agent in the polymer/cross-linker solution and the temperature and time of curing. Dow Corning sells a kit (liquid PDMS + liquid cross-linker) called Sylgard 184 for making solid PDMS polymer.
Remember, increasing cross-linker concentration (2:10 or 3:10) and/or curing time and temperature will increase stiffness.
Funtionalization procedure coming soon