Journal
POLYMERS
Volume 13, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/polym13030431
Keywords
starch nanocrystals; waxy potato starch; water redispersibility; dispersion stability
Categories
Funding
- National Natural Science Foundation of China [31760469]
- Key Research and Development Program of Guangxi
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This study developed an efficient method for preparing starch nanocrystals (SNCs), with modified starch showing improved dispersion properties for potential applications in safe and biodegradable food packaging.
Starch nanocrystals (SNCs) are a biodegradable polymer which has been widely studied and used in many fields. In this study, we have developed an efficient procedure for the preparation of SNCs. First, sodium hexametaphosphate (SHMP) and vinyl acetate (VAC) were used to modify waxy potato starch (WPS). Then, the modified starches were hydrolyzed with sulfuric acid to prepare SNCs. Results showed that SNCs prepared with modified starch had higher zeta potentials and better dispersion properties than the original starch. After modification, WPS still maintained its semi-crystalline structure, but the surface became rougher. SHMP-modified WPS showed a decrease in viscosity peak and an increase in gelatinization temperature. VAC-modified WPS showed increased swelling power. Additionally, SNCs prepared with VAC-modified WPS had better water redispersibility and dispersion stability than those from SHMP-modified starch-which will have broader application prospects in the field of safe and biodegradable food packaging.
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