El Instituto Politécnico Nacional
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http://repositoriodigital.ipn.mx/handle/123456789/11221| Título : | Thermal, Mechanical and Microstructures Properties of Cellulose Derivatives Films: A Comparative Study |
| Palabras clave : | Photoacoustic Carboxyl methylcellulose Hydroxyl propylcellulose Pectin Starch |
| Fecha de publicación : | 16-ene-2013 |
| Editorial : | Food Biophysics |
| Descripción : | The proposal in this study was to evaluate the physical properties of different biopolymers films. The materials used were: pectin, carboxyl methylcellulose, methylcellulose, hydroxyl propylcellulose, hydroxypropylmethylcellulose,and corn waxy starch; from these polysaccharides aqueous dispersions were prepared to 3% (w/v) for obtained films. In these biopolymer films, the thermal diffusivities (α) was evaluated by the Open Photoacoustic Cell method; also, their mechanical properties as tensile strength, elongation, and Young’s modulus were measured, their crystallinity percentage was evaluated by X-ray diffraction and microstructure through atomic force microscopy in contact mode. From the polysaccharide films, it was observed that most of them were flexible and
transparent. In the case of the films, mechanical properties were found that the highest value of tensile strength and
Young’s modulus corresponded to carboxyl methylcellulose with 69.17 and 1,912.20 MPa values, respectively. Also, Open Photoacoustic Cell method and X-ray diffraction measurements showed that there exist a correlation between the thermal diffusivity values and the crystallinity measured in the biopolymer films. It was also observed that α values of cellulose derived was affected by the substitution group in the molecule, reaching the highest α value, the films of carboxyl methylcellulose. Regarding the microstructural of the films, starch showed the highest roughness value(88.6 nm) whereas hydroxypropyl-methylcellulose resulted
with the lowest roughness value (7.67 nm). ORIGINAL ARTICLE published in journal Indexed Science Citation or JCR Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada del Instituto Politécnico Nacional |
| URI : | http://www.repositoriodigital.ipn.mx/handle/123456789/11221 |
| Otros identificadores : | ISSN 1557-1858 http://hdl.handle.net/123456789/750 |
| Aparece en las colecciones: | Doctorado |
Ficheros en este ítem:
| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| Norma.pdf | 70.39 kB | Adobe PDF | Visualizar/Abrir |
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