Comparison of Produced Film of Cellulose Nanofibers by Dried and Vacuum Filtrated Method from Unbleached Kraft Pulp of Kenaf Bast Fiber

Nanofibrillated cellulose fibers were produced from unbleached kraft pulp of kenaf bast fiber. Air dried and vacuum filtrated films of cellulose nanofibers were produced and their density and tensile properties were investigated. Kenaf bast fiber unbleached kraft pulp has good potential for production of cellulose nanofibers by microfluidizer; so that the use of kenaf bast fiber unbleached kraft pulp suspension with consistency about 5. 6% has the potential for cellulose nanofibers production. Transmission electron microscopy image showed the production of cellulose nanofibers with dimensions less than 100 nanometers. Although the apparent density of vacuum filtrated film was more than that of the air dried film (1105 compared to 1007 kg/m3)، tensile strength index of the air dried film was more than that of the vacuum filtrated film (148 compared to 140 Nm/g). Tensile strength، tensile energy abortion index and strain at breaking percentage of the air dried film were more than those of the vacuum filtrated film too. However، the elastic modulus of vacuum filtrated film of cellulose nanofibers was more than that of the air dried film that it can be related to the apparent density different of these films.