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Effect of Time Parameter on the Physicochemical Properties of Carboxymethyl Cellulose from Delonix Regia Seed Pods

Boluwatife Samuel Olubusoye, Oluwatobi M. Alabi, Moyosore F. Oyeti, Peter G. Oni, Mmotunrayo Oladele, Taiwo M. Adeniji, Oluwafemi Awolesi


The need to make cellulose (natural polymer-insoluble in water) a water soluble material is essential to enhance its use in the pharmaceutical and food processing industries. This paper investigates the effect of time parameter on the physicochemical properties of carboxylmethyl cellulose from Flamboyant plant seed pods. Cellulose isolated from Flamboyant plant (Delonix regia) seed pods (FSP) was modified to carboxymethyl cellulose (CMC) via mercerization and etherification using sodium hydroxide (NaOH) and monochloroacetic acid (ClCH2COOH) respectively. The concentration of sodium hydroxide at 20g/100mL and 60 minutes solubility of the CMC produced a high quality product. Moisture contents of the native and carboxymethyl cellulose were calculated to be 33.6% and 30.8% at 110°C respectively, with a slight decrease in the crystallinity of the CMC compared to the native cellulose. Swelling capacities of the CMC were determined and reported to increase with increasing temperature. The degree of substitution on the cellulose backbone was calculated to be 0.77 which clearly show that the CMC produced is highly substituted and therefore soluble in water. FTIR analysis produced peak at 1589.07cm-1 and a broad band at 3353.56cm-1 for the carboxyl and hydroxyl functional groups respectively. Solubility of the CMC obtained after etherification process increased with increase in reaction time. This solubility of the CMC in aqueous system explains the potential for its use and application in the production/manufacturing industries, and can be used extensively for various applications in paper, food, detergents, cosmetics, and textiles.


Natural polymer; Delonix regia; Etherification; Carboxymethyl Cellulose; Swelling Capacity

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