Optimización de la formulación de membranas de alginato de calcio para aumentar sus propiedades impermeables
In recent years, the efforts to care for the environment have increased and many of these have focused on the development of biodegradable alternatives for plastic packaging. Among these alternatives is the use of natural polysaccharide films such as sodium alginate, carrageenan and agar-agar. One o...
- Autores:
-
Bocanegra Gómez, María Camila
Hernández Ampudia, María del Mar
- Tipo de recurso:
- Trabajo de grado de pregrado
- Fecha de publicación:
- 2020
- Institución:
- Universidad de los Andes
- Repositorio:
- Séneca: repositorio Uniandes
- Idioma:
- spa
- OAI Identifier:
- oai:repositorio.uniandes.edu.co:1992/51636
- Acceso en línea:
- http://hdl.handle.net/1992/51636
- Palabra clave:
- Empaques de plástico
Esferificación
Alginato de sodio
Permeabilidad
Ingeniería
- Rights
- openAccess
- License
- http://creativecommons.org/licenses/by-nc-nd/4.0/
| Summary: | In recent years, the efforts to care for the environment have increased and many of these have focused on the development of biodegradable alternatives for plastic packaging. Among these alternatives is the use of natural polysaccharide films such as sodium alginate, carrageenan and agar-agar. One of the techniques used to make packaging is spherification, which consists of obtaining semisolid spheres with a thin membrane coating and a liquid center. In this text an investigation is carried out for the company JabblE in which three different treatments are proposed to improve the permeability of the membranes of the calcium alginate spheres. The treatments consist of the addition of carrageenan, agar-agar and a mixture of both that are added to the sodium alginate bath. To determine the effect on the permeability of the membrane, two different methodologies were carried out, one at room temperature and the other at 50°C, in which the loss of weight in time of the spheres of each of the formulations was measured. Additionally, properties such as hardness, compressibility, adhesiveness and cohesiveness were measured and photographs of the membrane were taken. Finally, it was found that the best treatment was the one with a mixture of carrageenan and agar-agar (treatment C) at low concentrations (formulations F8 and F9). Secondly, there was the treatment in which only carrageenan was added (treatment B, better formulations: F5 and F6) and finally the treatment with only agar-agar (treatment A). |
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