Abstract
Knowing the characteristics of sago starch is necessary for the development of sago utilization. The mean diameter and nanostructure are characteristics of sago starch important for flocculation and dispersion, useful in printing, manufacturing paper and corrugated cardboard, and other industries. Sago starch granules are oval and bell shaped, with 37.59 μm of mean diameter in water and 37.73 to 38.27 μm in 0.01, 0.1, and 1 mol L-1 NaClO4 solution, which showed a C-type (mainly A-type (monoclinic) with B-type (hexagonal) as an accessory) X-ray diffraction pattern. Sago starch showed variable charge, and the surface charge of sago starch granules ranged from positive to negative with a point of zero charge at pH 6.1 in 0.1 mol L-1 NaClO4 solution. These results indicate that sago starch had the intermediate dynamics of a point of zero charge as compared to corn (pH 4.7) and potato starches (pH 6.0).
https://ror.org/00b45dj41 
