The lab I contacted, accept samples in powdered form. Since nanocomposite is bulk obtained from mold, should it be powdered as well ? While powdering will the porosity definition still hold since some pores do not exist when powdered ? or are we talking about pores that are very tiny that are found even on smallest single particle that can be powdered ?
Muralishwara Kakunje, BET measurements can predict pores in three regimes, micropores < 2nm, 2nm
For a sample in powder form, its BET surface can increase depending on the material. This is what I observed on activated carbon. Because the crushing of the material makes pores appear which become more accessible.
I think it depends from the pores. BET analysis is generally used for microporous or ultramicroporous materials. For macroporous materials other methods are used (like mercury porosimetry).
Theoretically depending from the degree, powdering can destruct the strucutre.
Also, consider that the width of the BET tube is around 1-2 cm (I talk about most used apparatus, ASAP 2020 for example). I think the best thing to do, is to send 2 types of samples cutted into around 1 cm pieces and powdered form.
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