not sure how you may call it, I need a material (epoxy, resin, polymer, dough, coating,....) plz that can take the shape of slightly viscous particles, and then solidify quickly around them. Talking about particles that are less than 1 mm. when it solidifies it must not have big pores or defects.....
I do not understand your question. But in my case I used silicone molds for asphalt binders of 8mm in diameter. The sample adheres well when the plates are at temperatures of 64 ° C or higher.
Probably the details of what you ask matter a lot, I am not sure if I understand correctly, but what I do is I use molds made of photoresist with an array of circular holds (~10um diameter), then I pour PDMS (is a kind of transparent silicone) and let it cure then the PDMS has pillars on it. There are a lot of details (for example avoiding pores), but that's an idea for your to check
thanks for replying guys. Sorry Javier I am looking for much smaller sizes below 1 mm.
Jorge, I checked Sigma there are many types and Mn lengths, as well as terminations... what do you think. May you suggest literature or resource with easy protocol. As for details, consider for example small particles of glass or amorphous material etc, that I'd like to catch the shape into a solid mold. talking sizes of 100 to 1000 micrometers
Toufic, I still don't get what you want to do. So you disperse these particles in a substrate? Then you want to do a mold, but what do you want the mold for?
Hi Jorge, imaging diamond or particles, crystals, etc that are 100 to 500 micrometers for example. Some are soft/amorphous etc. I would like to use a chemical to trap them and mold into their shape, I can then cut or slice and analyze the shape...
and they don't have to be in solution, particle can be isolated but maybe humid or slightly wet
I think the PDMS will work. I am using the "SYLGARD 184 SILICONE ELASTOMER KIT". You basically pour some in a disposable plastic glass, mix it with the cure 10:1 (weight ratio). Then put the mix in a vacuum box for about one hour (I use one of those plastic boxes with a manual pump) to get rid of all the air bubbles. The mixture will become crystal clear. Then very careful (to avoid air bubbles) pour it on your sample. You can put again your sample in vacuum to get rid of any trapped air. Then bake it for about 2 hours at 60C. After that you can cut and slice it to analyze the shape. I have done this with 10um features without a problem
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