Usage of cellulosic nanofibers, starch-nanocellulose, and polyacrylamide-nanocellulose hybrid systems were investigated for the replacement imported long bleached kraft fibers in production durable papers. In this study, softwood pulp was added to cotton at four levels. Nanofibrillated cellulose (NFC) prepared from chemimechanical a 5% level with optional 1% cationic starch or 0.1% polyacrylami...