We all know how can we measure the water content or water uptake and porosity of the polymeric membranes. In my view they are both, related to void fraction of the membranes and water contact angle can affect on them. But what is the difference between them conceptually?
Here, porosity is the total accessible pores, while water content is the water penetrable pores.
As water surface tension is quite high, due to capillary effect it can not penetrate into all of the pores. So, pore volume is equal or greater than the water content.
I recommend the answer given by Ali N.
Further, difference of the theoretical porosity and experimental porosity will give the value numerically as asked by you.
Dear researchers,
Thank you so much for your answers. So Which one more affect the pure water flux? Or, What is the benefit of determining them? Can you explain more please?
Regards
The charge nature of the polymer membrane and that of feed water would as well affect the permeate water flux. Moreso, the pore size and symmetry would be relevant in flux rate. What would be more interesting to me is finding the most accurate method of determining the water content of membrane and its influence in membrane water flux, suggested would be appreciated.
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