Simple lysine-containing polypeptide and polyvinylamine adhesives for wet cellulose

A series of simple lysine-containing synthetic polypeptides was compared with polyvinylamine (PVAm) as adhesives laminating two-ply, wet, regenerated cellulose films. Adhesion was measured as the 90° delamination peel force. Adhesion increased with the molecular weight of both PVAm and the polypeptides. In all cases, PVAm gave stronger adhesion than polylysine or its copolymers. Oxidation of the cellulose films to introduce carboxyl groups …