Abstract
The implementation of dual chemical modification on starch represents a sophisticated approach to enhance the functional properties of starch for wider applications, surpassing those achieved through single modification. This study aimed to investigate the optimal functional properties of sago starch by utilizing a dual chemical modification technique that involves hydroxypropylation and succinylation. The sago starch was first modified by hydroxypropylation with 7% w/w propylene oxide under an alkaline condition for 3 hours. This process produced a hydroxypropylated starch with a degree of substitution of 0.107. Subsequently, succinylation was employed using succinic anhydride at 1% to 5% of starch weight in alkaline solutions for 2 hours. The results determined that the optimum functional characteristics of the dual modified sago starch were achieved by 3% succinic anhydride, in which succinyl degree of substitution, water holding capacity, oil holding capacity, swelling power, and solubility were 0.096, 3.28 g g-1, 2.66 g g-1, 5.83 g g-1, and 14.71%, respectively. Pasting properties, infrared spectroscopy, and morphological structure were performed to determine the change in the modified sago starch characteristics after hydroxypropylation and succinylation.
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Copyright (c) 2024 Derina Paramitasari, Musa Musa, Okta Nama Putra, Sarah Elisa, Suparman Suparman, Taufik Hidayat, Yanuar Sigit Pramana