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In this work, the acetylation of potato starch (PS) was prepared in acidic medium using molar ratios (RM) of PS/acetic anhydride (AnAc) of 1:0.5, 1:1, and 1:1.5. The characterization of acetylated starch (AcS) was realized for FT-IR, volumetric analysis, 1H NMR, and SEM. Specific viscosity (ηsp ) an...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | México |
| Institución: | UNIVERSIDAD AUTÓNOMA DEL ESTADO DE HIDALGO |
| Repositorio: | PÄDI Boletín Científico de Ciencias Básicas e Ingeniería del ICBI |
| Idioma: | español |
| OAI Identifier: | oai:repository.uaeh.edu.mx:article/11828 |
| Acceso en línea: | https://repository.uaeh.edu.mx/revistas/index.php/icbi/article/view/11828 |
| Access Level: | acceso abierto |
| Palabra clave: | Starch Acetylation Biopolymer Hydrolysis Almidón Acetilación Biopolímero Hidrólisis |
| Sumario: | In this work, the acetylation of potato starch (PS) was prepared in acidic medium using molar ratios (RM) of PS/acetic anhydride (AnAc) of 1:0.5, 1:1, and 1:1.5. The characterization of acetylated starch (AcS) was realized for FT-IR, volumetric analysis, 1H NMR, and SEM. Specific viscosity (ηsp ) and paste viscosity were determined. Degree of substitution (DS) values of 0.14, 0.45, and 1.08 were obtained with reaction yields of 28%, 45%, and 75%, respectively. In this case the acetylation reactions can be controlled by RM. Thus, DS and reaction yield increases with an increase the RM, which appears to be related to greater fragmentation of PS granules. The analysis of η sp and paste viscosity revealed that the combination of hydrolysis reactions and associations of hydrophobic regions influence the viscosity of AcS. |
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