Why some hydrogels are opaque and some are transparent? Does it depends upon the thermodynamics/kinetics of gelation? Or on nanostructures of gel?

I have four hydrogels. Out of four two are transparent which take 8-10 hours to form. Other two are opaque which are formed after 3-4 hours. How to explain the transparency and opacity of these...

21 May 2018 8,677 3 View