| Summary: | Sodium periodate is as an oxidizing agent that breaks the cellulose ring at the C2-C3 bond of the anhydroglucose units (AGU) by creating two vicinal hydroxyl groups which have the potential to form a Schiff base for further reactions. The objective of this study was to evaluate the effects of different amounts of sodium periodate on the formation and arrangement of hydroxyl groups at the C2-C3 bond of the anhydroglucose units (AGU), which is so-called dihydroxyl cellulose (DHC). Firstly, microcrystalline cellulose (MCC) was sonicated to break down the intermolecular and intramolecular interactions. Then, MCC was oxidized with 3 g and 5 g of sodium periodate to prepare the DHC compounds. The DHC and MCC were characterized by FTIR-ATR, FESEM, TGA, and XRD techniques. The numbers of hydroxyl group of DHC increased with the addition of sodium periodate. Besides, the thermal stability and crystallinity of DHC was found to be higher with the increasing amount of sodium periodate. Lastly, the morphology of DHC was found to be smooth, needle-(1:3) and leaf-like (1:5) structure as compared to the irregular forms of MCC. Difference of thermal stability, crystallinity, and morphological structure of DHC compounds concluded that different amounts of sodium periodate could modify the physicochemical properties of MCC. © 2020, Malaysian Society of Analytical Sciences. All rights reserved.
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