Layer-by-layer assembly of titanate nanosheets/poly- (ethylenimine) on PEN films

摘要

Alternating layers of TiO_2 nanosheets and poly( ethylenimine) were sequentially dip coated onto a polyethylene naphthalate substrate (PEN) using layer-by-layer assembly. UV-vis spectroscopy shows a linear growth of the PEIanosheets bilayer on the PEN substrate. The cross-section microstructure of the LBL film was studied using scanning electron microscopy (SEM). Helium permeability measurement showed that the titania nanosheet/PEI bilayers reduced the permeation rate of He through the coated PEN film.