Effect of Homogenization Method and Carvacrol Content on Microstructural and Physical Properties of Chitosan-Based Films
| Autor: | Tatiana Beldarrain-Iznaga, Zoila Flores, Diego San-Martin, Javier Leiva-Vega, Ricardo Villalobos-Carvajal |
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| Rok vydání: | 2020 |
| Předmět: |
Health (social science)
Materials science Scanning electron microscope carvacrol microstuctural properties 02 engineering and technology Plant Science lcsh:Chemical technology Health Professions (miscellaneous) Microbiology Homogenization (chemistry) Article physical properties Chitosan chemistry.chemical_compound 0404 agricultural biotechnology lcsh:TP1-1185 Carvacrol nanoemulsified film Food preservation 04 agricultural and veterinary sciences 021001 nanoscience & nanotechnology Microstructure 040401 food science chemistry Chemical engineering Permeability (electromagnetism) Elongation chitosan 0210 nano-technology Food Science |
| Zdroj: | Foods Volume 10 Issue 1 Foods, Vol 10, Iss 141, p 141 (2021) |
| ISSN: | 2304-8158 |
| Popis: | The use of EOs nanoemulsion to develop active edible films offers a new way to modify transport properties and to release active compounds while improving mechanical resistance, transparency, and antioxidant and antimicrobial activity. The aim of this study was to study the influence of homogenization conditions and carvacrol content on the microstructure and physical properties of edible nanoemulsified chitosan films. Film-forming emulsions (FFE) were prepared with chitosan (1.5%), Tween 80 (0.5%), and carvacrol (0.25%, 0.5%, and 1.0%) two homogenization methods were used (rotor-stator and rotor-stator followed by high-pressure homogenization). Film internal and surface microstructure was characterized by scanning electron microscopy (SEM) and film physical properties, such as mechanical, optical, and water barrier, were evaluated. Results showed that the high-pressure homogenization method promoted a significant change on film microstructure, leading to improved properties. Carvacrol droplets were smaller and homogeneously distributed in the film when 0.5% (v/v) carvacrol was incorporated (1:1 Tween 80: carvacrol ratio). As a consequence, emulsified films obtained at high pressure were less opaque, had greater elongation, and had a lower permeability to water vapor than those obtained by the rotor-stator method. Therefore, high-pressure homogenization is a good method to obtain edible emulsified films with desirable properties for food preservation. |
| Databáze: | OpenAIRE |
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