Comparison of Photonic Block Copolymer Films Swollen with Two kinds of Ionic Liquid

Abstract

Volatile solvent(mainly Alcohol) swollen 1-dimenional photonic films of polystyrene-b-poly(2-vinylpyridine)(PS-b-P2VP) were widely studied. Because that solvent have volatile property, visual characteristic disappear quickly. we used two kinds of Ionic Liquid which have same anion (bis(trifluoromethanesulfonyl)imide and other kinds of cation (imidazolium and 1-Ethyl-3-methylimidazolium). Because Ionic Liquid have nonvolatile property, photonics swollen ionic liquid long maintained their photonic properties. Additionally, we studied different molecular weight of PS-b-P2VP (57k-57k and 75k-66.5k) at swelling two kinds of ionic liquid. Four results showed up wavelength from 400nm to 600nm.