I have polymer film to analyse pore size distribution. I tried BET but it didn't work because the surface area was not even close to 5 m^2 although the sample holder was full. Therefore, the technician told me it will not work since the amount of pore is low and stopped the experiment. Does anyone have any idea how can I do the pore size distribution in such sample?
you can try krypton gas for low surface area. Many papers are there which report low surface area measurement using krypton gas. Mass of mono layer of krypton is more than nitrogen which increase the accuracy.
read this http://www.iesmat.com/iesmat/upload/file/QTC/QTC%20-%20Apl%20-%20Analisis%20de%20area%20superficial%20baja%20con%20Krypton%20a%2077%20K.pdf
You may also consider performing krypton adsorption experiments at liquid argon temperature (87.3 K) according to the following method, developed by Thommes et al.: http://cat.inist.fr/?aModele=afficheN&cpsidt=19308494.The method has been applied successfully to the assessment of pore size distributions of thin micro/mesoporous films, and was validated using micro- and mesoporous molecular sieves as reference materials.
Scanning Electron microscopy (SEM) or Transmission Electron Microscopy (TEM) Can help you in this case
I am looking for the same information. I see that that this question was asked 3 years ago.
Could you please inform me which technique did you use and which condition (gaz, temperature, etc). Thank you
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