رسالة جامعية
Antioxidant polylactic acid (PLA) films containing rice straw extracts for active food packaging applications
| العنوان: | Antioxidant polylactic acid (PLA) films containing rice straw extracts for active food packaging applications |
|---|---|
| المؤلفون: | Bas Gil, Nuria Julia |
| المساهمون: | Pineda Lucena, Antonio |
| سنة النشر: | 2021 |
| المجموعة: | RIUCV - Universidad Católica de Valencia San Vicente Mártir |
| مصطلحات موضوعية: | Polylactic acid, Rice straw extract, Phenolic compounds, Antioxidant activity, Ultrasound and heating extraction, Release kinetics, Film, Food simulant, Ácido poliláctico, Extracto de paja de arroz, Compuestos fenólicos, Actividad antioxidante, Extracción por ultrasonidos y calor, Cinética de liberación, Película, Simulante de alimentos, 3309 Tecnología de Los Alimentos, 3309.07 Productos de Cereales, 3309.13 Conservación de Alimentos |
| الوصف: | Rice straw is a residue produced in the agricultural industry, whose management and revaluation are of technological interest. In the present study, films of biodegradable polylactic acid (PLA), were made incorporating rice straw extract for active food packaging, with the aim of, firstly, to observe if the properties of the films change after the incorporation of the active extract, and secondly observe the antioxidant activity that these have on different food simulants. To achieve the objective, the mechanical, thermal, optical and permeability properties of the active films were measured and analyzed. In addition, the phenolic content of the simulants in contact with the films as function of time and the antioxidant capacity of the films were examined. Observable changes in appearance of films were noticed as extract was incorporated, particularly a more brown-yellowish color was acquired. Although tensile strength and extensibility values decreased as extract concentration increased, the elastic modulus increased. In addition, there was a slight and not so significant decrease in barrier properties to oxygen and water vapor. There wasn’t a drastic change in glass transition (Tg) values of the films by the extract incorporation. Finally, the extraction method used (combined ultrasound and reflux heating in water) gave rise to a rice straw extract with high phenolic content (37.1 mg GAE/ g freeze-dried extract) and a high antioxidant capacity. Likewise, the compound release to the simulants tested provide them with positive values of phenolic content and antioxidant activity. The attained results support that the films proposed are a potential material for use in food packaging which, in addition to act as a physical barrier for protection of the integrity of the foodstuff, can increase the shelf-life of products, limiting oxidation reactions. Thus, this study contributes to attend the two main problems existing nowadays: the reduction of the environmental problem associated to the single-use plastics and ... |
| نوع الوثيقة: | bachelor thesis |
| اللغة: | English |
| العلاقة: | http://hdl.handle.net/20.500.12466/2258Test |
| الإتاحة: | https://doi.org/20.500.12466/2258Test https://hdl.handle.net/20.500.12466/2258Test |
| حقوق: | Attribution-NonCommercial-NoDerivatives 4.0 Internacional ; http://creativecommons.org/licenses/by-nc-nd/4.0Test/ ; openAccess |
| رقم الانضمام: | edsbas.9BCCE116 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |