I am trying to build a mould for air liquid support, using PDMS. Previously,I have tried to build the mould using AB Liquid Food Maker silicone and it was perfect, until I tried to build the air liquid support using PDMS. I could not take the component out from the mould as it has performed 'mechanical lock' with the silicone. Any idea as to how to build the component and its mould using PDMS? Note that the component has notches on the surface as well as the base. Herewith I attached the file of the air liquid support I need to create.
Thank you.
Try printing a molding on a 3D printer using PVA material. It is completely soluble in water. You can easy remove PVA from your model by dint of water.
You could also try using a liquid PVA mold release in your mold. Pour it into the mold and then pour it out and allow it to dry. You will end up with a coating in the range of 1-10 microns (except for meniscus in corners) depending on the PVA concentration used.
Thanks for your suggestion. Am planning to build the mold using PDMS, as it is safe and well established to be used in cell culture work. Is there any chance I can use PVA as releasing agent of PDMS? Ron Reiserer
Yes, PVA is a fine release agent for PDMS. I use PVA to coat glass, plastic, and metal molds for casting PDMS as well as a lift-off layer for thin PDMS films.
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