Polarized light microscopy of cellulose nanocrystal suspensions and films (PPT)

摘要

1.Evaporation of water from CNC suspensions... (1)causes a decrease in chirat nematic pitch. (2)introduces concentration gradients in sample. (3)causes jamming at high CNC concentrations. (4)results in coffee-stain effect for open droplets. 2.The structures of the resulting films are heterogeneous, with spatial variations in.. (1)chiral nematic pitch (2)orientation of chiral nematic axis