Preparation and Investigation into the Effect of Mechanical Treatment Time on the Properties of Cellulose Nanofibril
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Abstract
In this work, sisal fiber was defibrillated into cellulose nanofibrils by mechanical treatment. The nanofibrillated fibers were subsequently characterized by field emission scanning electron microscope (FE-SEM), X-ray Diffractometer (XRD), Fourier transform infrared spectrometer (FTIR), and thermogravimetric analyzer (TGA). The cellulose nanofibers had been successfully prepared by high pressure homogenization at various mechanical treatment times (i.e., 50, 70, and 90 min). The morphology studies revealed the diameter of nanofibers was within the range of 10-30 nm. The experimental results showed that the thermal stability decreased (281.8-272.5๐C) with increasing defibrillation time, as a result of the reduction in crystallinity index (72.3-58.5%). Nevertheless, a decrease in crystallinity could enhance the absorption property, and the further study is going to use the nanocellulose as a precursor to prepare an absorptive hydrogel. The cellulose nanofibrils could be utilized in several applications, for instance, packaging, coating, electronic devices, medical, and cosmetic.
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