Can you suggest some methods to increase the hydrophobicity and surface roughness of a polymeric membrane surface? Is it possible to make the surface of a hydrophilic polymeric membrane in to superhydrophobic by any means of surface modification?
You can use plasma nanotexturing with a CF4 or C4F8 gas. Also plasma nanotexturing with O2 or Ar gas followed by deposition of a thin layer of PTFE, C4F8, pFOTS etc.
I propose plasma since you can modify both roughness and chemistry with one machine.