Surface Modification of Cellulose Fibers by Starch Grafting

Grafting hydrogel polymer, such as polyacrylamide, acrylic acid, poly(n-propylacrylamide), etc, has been attracting more research interests. In this study, a technique that can easily graft raw starch on unrefined or slightly refined cellulose fibers is developed. The grafted starch functions similarly as wood fibrils generated by refining. The effects of grafting conditions, including pH, temperature, fiber consistency, crosslinker dosage, and starch dosage on grafting performance were investigated. The results indicate that grafted starch can significantly improve fiber-fiber bonding. Other advantages of by starch grafting will also be discussed.