Gelatin hydrogels for rheometer

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Marilli is seeking advice on acquiring suitable samples for rheometer measurements of chemically crosslinked gelatin hydrogels using EDC. The primary issue is that the hydrogels remain sticky post-crosslinking, making it difficult to punch out samples. A related study addressed a similar problem by applying a uniform thin layer of silicone vacuum grease to the edges of shear discs to prevent water loss from the samples. This method could potentially provide a solution to the stickiness issue encountered with the hydrogels.
marilli
Hello, I am Marilli and I have a problem. :p
I am trying to acquire some suitable samples for the rheometer measurements of gelatin hydrogels. The hydrogels are chemically crosslinked with EDC but after the crosslinking they remain sticky and therefore not suitable samples can be punzed out. Has anyone an idea?
 
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What is punzed?
 
This study also had a similar issue, this was their solution: " ...A uniform thin layer of silicone vacuum grease was applied to the outer circular edges of the shear discs to prevent water loss from the samples38."
 

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