Gelatinized Cassava Starch Obtained via Low Molar Ratio Hydroxypropylation Reaction.

ABSTRACT: Hydroxypropylated starch was successfully synthesized, aiming to address the limitations of native starch, such as poor mechanical properties and water sensitivity, which hinder its application in biodegradable polymers. The modification process, conducted at 115-135 °C with propylene oxide (PO) molar ratios of 0.4-0.8 [PO molecule per OH of starch], effectively disrupted the native starch structure. FTIR and ¹³C NMR confirmed methyl group incorporation, with lower temperatures and higher PO ratios yielding greater modification. SEM and XRD analyses demonstrated complete gelatinization; although some short-range order structures are present, long-range structures were eliminated, while DSC confirmed the absence of gelatinization peaks. TGA revealed the integration of lower molec

SUBMITTER: Lopes HSM 

PROVIDER: S-EPMC11966575 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature