Hello dear, if you make the addition of material hydrophilic to another hydrophobic, the angle contact will change.

I think that you could make your question clearer, but I'm pretty sure that the answer is "Yes".

Hi dear Edwin, yes I know it but my question refers to concentration that should be used for final hydrophobic polymer.

for example I choose PVC for base polymer that it should be mixed with THF to solve and finaly nanoparticles added to it (the amount of added nanoparticles is 5% or 10% of PVC),  if I change the concentration of PVC( for example 2g or 3g PVC in 100cc THF ), is it possible that final contact angle be changed?!

Hi Dear Alan, I think that I could explane enough about my question, if there is still unclear explanation, please notice me about it. 

thanks a lot.

Mohammad, It's already much clearer from your remark above. Now my understanding is that you dry a polymer solution mixed with nanoparticles to make a superhydrophobic surface.

I believe your question could be rephrased as: Could the polymer solution concentration change the wetting properties of the nanoparticle/polymer composite created by drying? The answer is "Yes it could". The best example of particle migration during drying is Tom Witten's famous "coffee ring effect", which is not exactly your scenario.  I know that you can find a number of papers on particle migration during drying, in Langmuir. Unfortunately, a quick search with Google Scholar could not find them. Try "drying latex migration" in Google Scholar and follow up the references that appear.

Yes, exactly is this and I really appreciate your help .

You gave to me a main and important information about my project. 

THANK'S A LOT