2017 : Temperature Effect of Crystalinity in Cellulose Nanocrystal from Oil Palm Empty Fruit Bunch (OPEFB) using Sonication-Hydrothermal Methods
Prof. Dr. Ir. Achmad Roesyadi M.Sc
Production of cellulose nanocrystals (CNCs) from cellulose of oil palm empty fruit bunches (OPEFB) have been done. The delignification of OPEFB was mixed with 17, 5% NaOH and carried out in the three-neck flask with refluxed for 2 hour at 80 o C. Further the suspension was bleached with NaOCl 2% for 1 hour at 70 o C. Then, to produce CNCs, Cellulose was firstly sonicated for 30 minutes at 40 o C. After that cellulose was hydrolized at hydrothermal reactor for 0, 1, 2, 3, 4, 5, hours at 110 and 120 o C respectively. After filtration and washing, CNCs was analyzed by X-Ray Diffraction and the result shows that the grade of the highest CNCs crystalinity at consentration of HCL 2 M at a temperature of 110 o C with reaction time of 2 hours is equal to 75.87%. It can be concluded that sonication-hydrothermal can increase the grade of crystalinity of cellulose nanocrystal.