Silica nanoparticle is embedded in the support layer. The support layer was prepared by the phase inversion method and the surface layer was prepared by interfacial polymerization.
According to Wikipedia and common sense, porosity does not exceed 100%.
Porosity is by concept the amount of void in a material structure. Of course, crystalline unit cells can present small porosity voids (like 4 angstroms) and so on, which can gives us a profound discussion. However, if your material has 100% porosity, it means that is 100% empty spaces, which is incorrect and has no physical meaning when dealing with materials that clearly occupies a space in the universe.
A simple way to try to measure it, is to soak your membrane in water, measure the weight before and after the soaking. You must know your membrane thickness as well.
Porosity(%) = (𝑊w - Wd)୵(𝜌w𝐴δ) × 100%
where Ww is the wet sample weight (g), Wd is the dry sample weight (g), ρw is the density of pure water (g/cm3), A is the area of membrane in the wet state (cm²), and δ is the thickness of membrane in the wet state (cm). I retrieved this information from equation 2 of the following article:
Article Preparation of Porous Polymeric Membranes Based on a Pyridin...
Best regards,
GG.
Thanks for your complete explanation dear Gustavo Henrique de Magalhães Gomes
- Badges
- Science topic
- Similar topics
- Gels