Banca de DEFESA: KARINA LIZZETH PEDRAZA GALVÁN

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : KARINA LIZZETH PEDRAZA GALVÁN
DATA : 31/03/2020
HORA: 14:00
LOCAL: FACULDADE DE FARMACIA
TÍTULO:

DEVELOPMENT OF PBAT FILMS INCORPORATED WITH BIXIN AND CITRIC ACID: PROPERTIES AND ACTIVE ACTION

PALAVRAS-CHAVES:

Active packaging, Central Composite Rotational Delineation (CCCD), PBAT:bixin:citric acid films, antioxidant and antimicrobial efficiency.

PÁGINAS: 86
GRANDE ÁREA: Ciências Agrárias
ÁREA: Ciência e Tecnologia de Alimentos
SUBÁREA: Tecnologia de Alimentos
ESPECIALIDADE: Embalagens de Produtos Alimentares
RESUMO:

It is estimated that by 2040 synthetic polymers will disappear from different production chains due to the irreversible damage of the disposal to the environment. As a contribution to this new perspective, the use of biopolymers is increasingly promoted, associated with the development of active packaging that reduce the development of microorganisms and chemical reactions of the packaged product. Therefore, the aim of this study was to develop by casting, active films of the poly (butylene adipate co-terephthalate) (PBAT) and different concentrations of bixin and citric acid. Eleven active films were developed by a Central Composite Rotational Delineation (CCCD) and characterized in terms of the dependent variables: physical, chemical and mechanical properties, in addition to barrier and antioxidant and antimicrobial efficacy. The films showed homogeneity, thermal stability greater than 200 ° C, and reduced water vapor permeability by up to 10 times when compared to the PBAT control film (8.589 ± 0.689 g.mm / Kpahm2). All films containing the additives showed a representative decrease in tensile strength and elongation at break. Formulation 8 with intermediate concentrations of bixin (0.30%) and maximum citric acid (1.19%) inhibited the development of pathogenic bacteria Salmonella, Bacillus cereus, Staphylococcus aureus and mainly Listeria monocytogenes (P <0.05) and presented the highest percentage of free radical scavenging (DPPH). The films presented colors with different intensities depending on the concentration of bixin, some of which can be used as packaging for certain food matrices subject to oxidation and sensitive to the development of pathogenic microorganisms. The mechanical and color parameters, in addition to water vapor permeability and antioxidant action, underwent significant changes in at least one of the additives incorporated in the PBAT matrix. These results support the applicability of bixin and citric acid in PBAT films with potential for use as packaging materials, contributing to food safety and environmental sustainability.

MEMBROS DA BANCA:
Interno - 4725209 - CAROLINA OLIVEIRA DE SOUZA
Interno - 1350842 - JANICE IZABEL DRUZIAN
Interno - 1142664 - MARION PEREIRA DA COSTA
Externo à Instituição - DENILSON DE JESUS ASSIS - UNIFACS
Externo à Instituição - JANIA BETANIA ALVES DA SILVA - UFRB