How the swelling of the hydrogel is affected by the addition of zinc oxide nanoparticles?

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Dhanya George

Addition of ZnO nanoparticles might have resulted in hydrophobicity thus repelling water molecules and decrease in hydrogel swelling.

Arun Krishna Kodoth

Thank you Dhanya George

But how this happens ?

I have seen papers which describes the dual nature of ZnO. That is ZnO can be hydrophobic as well as hydrophilic. Is it so ? or can we give any other explanation ?