This paper describes a layer-by-layer (LbL) method to sandwich Linde type A (LTA) zeolite nanoparticles between two polyelectrolytes, polyacrylic acid (PAA) and polyethylenimine (PEI), on a polyacrylonitrile (PAN) support layer. The purpose of this LbL method is to make a Forward Osmosis (FO) membrane with high zeolite loading. This paper presents ...