Dear Sweety Rani, to a very low extent because of the hindrance of two bulky neighborhood benzene rings. Chain stiffness and compactness reflected by high Tg limit (almost excluded) diffusion at ambiant conditions. These are the main reasons behind PES chemical modification. My Regards

Polyethersulfone contains a sulfone (O=S=O) group in the main chain which is a polar group and it provides hydrophilicity to the membrane.

Dear all, neat polyethersulfone is hydrophobic. Membranes of polyethersulfone are hydrophilic because of surface modification, maily by introducing polar or charged functional groups. Please take a look at the following document. My Regards

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5812116/

Dear Abdelkader BOUAZIZ would the sulfone group in the membrane not interact with water (because of hydrogen bonding between oxygen of sulfone group and hydrogen of water)?

Dear Sweety Rani, to a very low extent because of the hindrance of two bulky neighborhood benzene rings. Chain stiffness and compactness reflected by high Tg limit (almost excluded) diffusion at ambiant conditions. These are the main reasons behind PES chemical modification. My Regards

Dear Abdelkader BOUAZIZ thank you so much.

Hi;

PES is hydrophilic in nature due to its molecular structure which facilitates hydrogen bonding with water molecules.

With my best regards